January 2024 - Linux-stable-mirror

by Greg Kroah-Hartman

This is the start of the stable review cycle for the 6.6.10 release. There are 49 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know. Responses should be made by Fri, 05 Jan 2024 16:47:49 +0000. Anything received after that time might be too late. The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.10-rc1… or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y and the diffstat can be found below. thanks, greg k-h ------------- Pseudo-Shortlog of commits: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Linux 6.6.10-rc1 Pablo Neira Ayuso <pablo(a)netfilter.org> netfilter: nf_tables: skip set commit for deleted/destroyed sets Léo Lam <leo(a)leolam.fr> wifi: nl80211: fix deadlock in nl80211_set_cqm_rssi (6.6.x) Johannes Berg <johannes.berg(a)intel.com> wifi: cfg80211: fix CQM for non-range use Steven Rostedt (Google) <rostedt(a)goodmis.org> tracing: Fix blocked reader of snapshot buffer Steven Rostedt (Google) <rostedt(a)goodmis.org> ftrace: Fix modification of direct_function hash while in use Steven Rostedt (Google) <rostedt(a)goodmis.org> ring-buffer: Fix wake ups when buffer_percent is set to 100 Keith Busch <kbusch(a)kernel.org> Revert "nvme-fc: fix race between error recovery and creating association" Matthew Wilcox (Oracle) <willy(a)infradead.org> mm/memory-failure: check the mapcount of the precise page Matthew Wilcox (Oracle) <willy(a)infradead.org> mm/memory-failure: cast index to loff_t before shifting it Charan Teja Kalla <quic_charante(a)quicinc.com> mm: migrate high-order folios in swap cache correctly Baokun Li <libaokun1(a)huawei.com> mm/filemap: avoid buffered read/write race to read inconsistent data Muhammad Usama Anjum <usama.anjum(a)collabora.com> selftests: secretmem: floor the memory size to the multiple of page_size Sidhartha Kumar <sidhartha.kumar(a)oracle.com> maple_tree: do not preallocate nodes for slot stores Shin'ichiro Kawasaki <shinichiro.kawasaki(a)wdc.com> platform/x86: p2sb: Allow p2sb_bar() calls during PCI device probe Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: fix slab-out-of-bounds in smb_strndup_from_utf16() David E. Box <david.e.box(a)linux.intel.com> platform/x86/intel/pmc: Move GBE LTR ignore to suspend callback David E. Box <david.e.box(a)linux.intel.com> platform/x86/intel/pmc: Allow reenabling LTRs David E. Box <david.e.box(a)linux.intel.com> platform/x86/intel/pmc: Add suspend callback Christoph Hellwig <hch(a)lst.de> block: renumber QUEUE_FLAG_HW_WC Paolo Abeni <pabeni(a)redhat.com> mptcp: fix inconsistent state on fastopen race Paolo Abeni <pabeni(a)redhat.com> mptcp: fix possible NULL pointer dereference on close Paolo Abeni <pabeni(a)redhat.com> mptcp: refactor sndbuf auto-tuning Helge Deller <deller(a)gmx.de> linux/export: Ensure natural alignment of kcrctab array Helge Deller <deller(a)gmx.de> linux/export: Fix alignment for 64-bit ksymtab entries Arnd Bergmann <arnd(a)arndb.de> kexec: select CRYPTO from KEXEC_FILE instead of depending on it Arnd Bergmann <arnd(a)arndb.de> kexec: fix KEXEC_FILE dependencies Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> virtio_ring: fix syncs DMA memory with different direction Zizhi Wo <wozizhi(a)huawei.com> fs: cifs: Fix atime update check Jeff Layton <jlayton(a)kernel.org> client: convert to new timestamp accessors Jeff Layton <jlayton(a)kernel.org> fs: new accessor methods for atime and mtime Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: avoid duplicate opinfo_put() call on error of smb21_lease_break_ack() Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: lazy v2 lease break on smb2_write() Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: send v2 lease break notification for directory Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: downgrade RWH lease caching state to RH for directory Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: set v2 lease capability Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: set epoch in create context v2 lease Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: don't update ->op_state as OPLOCK_STATE_NONE on error Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: move setting SMB2_FLAGS_ASYNC_COMMAND and AsyncId Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: release interim response after sending status pending response Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: move oplock handling after unlock parent dir Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: separately allocate ci per dentry Zongmin Zhou <zhouzongmin(a)kylinos.cn> ksmbd: prevent memory leak on error return Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: fix kernel-doc comment of ksmbd_vfs_kern_path_locked() Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: no need to wait for binded connection termination at logoff Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: add support for surrogate pair conversion Kangjing Huang <huangkangjing(a)gmail.com> ksmbd: fix missing RDMA-capable flag for IPoIB device in ksmbd_rdma_capable_netdev() Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: fix kernel-doc comment of ksmbd_vfs_setxattr() Namjae Jeon <linkinjeon(a)kernel.org> ksmbd: reorganize ksmbd_iov_pin_rsp() Cheng-Han Wu <hank20010209(a)gmail.com> ksmbd: Remove unused field in ksmbd_user struct ------------- Diffstat: Makefile | 4 +- arch/powerpc/Kconfig | 4 +- arch/riscv/Kconfig | 4 +- arch/s390/Kconfig | 4 +- arch/x86/Kconfig | 4 +- drivers/nvme/host/fc.c | 21 +-- drivers/platform/x86/intel/pmc/adl.c | 9 +- drivers/platform/x86/intel/pmc/cnp.c | 26 ++- drivers/platform/x86/intel/pmc/core.c | 12 +- drivers/platform/x86/intel/pmc/core.h | 7 +- drivers/platform/x86/intel/pmc/mtl.c | 9 +- drivers/platform/x86/intel/pmc/tgl.c | 9 +- drivers/platform/x86/p2sb.c | 178 ++++++++++++++++----- drivers/virtio/virtio_ring.c | 6 +- fs/libfs.c | 41 +++-- fs/smb/client/file.c | 18 ++- fs/smb/client/fscache.h | 6 +- fs/smb/client/inode.c | 17 +- fs/smb/client/smb2ops.c | 6 +- fs/smb/common/smb2pdu.h | 1 + fs/smb/server/connection.c | 16 -- fs/smb/server/ksmbd_work.c | 51 +++--- fs/smb/server/mgmt/user_config.h | 1 - fs/smb/server/oplock.c | 118 ++++++++++++-- fs/smb/server/oplock.h | 8 +- fs/smb/server/smb2misc.c | 15 +- fs/smb/server/smb2ops.c | 9 +- fs/smb/server/smb2pdu.c | 258 ++++++++++++++++-------------- fs/smb/server/transport_rdma.c | 40 +++-- fs/smb/server/unicode.c | 187 ++++++++++++++++------ fs/smb/server/vfs.c | 14 +- fs/smb/server/vfs_cache.c | 30 ++-- fs/smb/server/vfs_cache.h | 9 +- include/linux/blkdev.h | 2 +- include/linux/export-internal.h | 6 +- include/linux/fs.h | 85 ++++++++-- kernel/Kconfig.kexec | 2 + kernel/trace/ftrace.c | 100 ++++++------ kernel/trace/ring_buffer.c | 12 +- kernel/trace/trace.c | 20 ++- lib/maple_tree.c | 11 ++ mm/filemap.c | 9 ++ mm/memory-failure.c | 8 +- mm/migrate.c | 9 +- net/mptcp/protocol.c | 27 +++- net/mptcp/protocol.h | 63 +++++++- net/mptcp/sockopt.c | 5 +- net/mptcp/subflow.c | 29 ++-- net/netfilter/nf_tables_api.c | 2 +- net/wireless/core.h | 1 + net/wireless/nl80211.c | 56 ++++--- tools/testing/radix-tree/maple.c | 2 +- tools/testing/selftests/mm/memfd_secret.c | 3 + 53 files changed, 1070 insertions(+), 524 deletions(-)

1 year, 1 month

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FAILED: patch "[PATCH] block: Don't invalidate pagecache for invalid falloc modes" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 1364a3c391aedfeb32aa025303ead3d7c91cdf9d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023101511-outpost-crucial-c477@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 1364a3c391ae ("block: Don't invalidate pagecache for invalid falloc modes") 05bdb9965305 ("block: replace fmode_t with a block-specific type for block open flags") 5e4ea834676e ("block: remove unused fmode_t arguments from ioctl handlers") cfb425761c79 ("block: move a few internal definitions out of blkdev.h") 99b07780814e ("rnbd-srv: replace sess->open_flags with a "bool readonly"") 658afed19cee ("mtd: block: use a simple bool to track open for write") 7d9d7d59d44b ("nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool") 2e80089c1824 ("scsi: replace the fmode_t argument to scsi_ioctl with a simple bool") 5f4eb9d5413f ("scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool") 81b1fb7d17c0 ("fs: remove sb->s_mode") 3f0b3e785e8b ("block: add a sb_open_mode helper") 2736e8eeb0cc ("block: use the holder as indication for exclusive opens") 2ef789288afd ("btrfs: don't pass a holder for non-exclusive blkdev_get_by_path") 29499ab060fe ("bcache: don't pass a stack address to blkdev_get_by_path") c889d0793d9d ("swsusp: don't pass a stack address to blkdev_get_by_path") ae220766d87c ("block: remove the unused mode argument to ->release") d32e2bf83791 ("block: pass a gendisk to ->open") 444aa2c58cb3 ("block: pass a gendisk on bdev_check_media_change") 7ae24fcee992 ("cdrom: remove the unused mode argument to cdrom_release") 473399b50de1 ("cdrom: remove the unused mode argument to cdrom_ioctl") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1364a3c391aedfeb32aa025303ead3d7c91cdf9d Mon Sep 17 00:00:00 2001 From: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Date: Wed, 11 Oct 2023 13:12:30 -0700 Subject: [PATCH] block: Don't invalidate pagecache for invalid falloc modes Only call truncate_bdev_range() if the fallocate mode is supported. This fixes a bug where data in the pagecache could be invalidated if the fallocate() was called on the block device with an invalid mode. Fixes: 25f4c41415e5 ("block: implement (some of) fallocate for block devices") Cc: stable(a)vger.kernel.org Reported-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> Reviewed-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Mike Snitzer <snitzer(a)kernel.org> Fixes: line? I've never seen those wrapped. Link: https://lore.kernel.org/r/20231011201230.750105-1-sarthakkukreti@chromium.o… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/block/fops.c b/block/fops.c index acff3d5d22d4..73e42742543f 100644 --- a/block/fops.c +++ b/block/fops.c @@ -772,24 +772,35 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, filemap_invalidate_lock(inode->i_mapping); - /* Invalidate the page cache, including dirty pages. */ - error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); - if (error) - goto fail; - + /* + * Invalidate the page cache, including dirty pages, for valid + * de-allocate mode calls to fallocate(). + */ switch (mode) { case FALLOC_FL_ZERO_RANGE: case FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOUNMAP); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOFALLBACK); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL); break;

1 year, 1 month

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[PATCH] input/vmmouse: Fix device name copies

by Zack Rusin

From: Zack Rusin <zackr(a)vmware.com> Make sure vmmouse_data::phys can hold serio::phys (which is 32 bytes) plus an extra string, extend it to 64. Fixes gcc13 warnings: drivers/input/mouse/vmmouse.c: In function ‘vmmouse_init’: drivers/input/mouse/vmmouse.c:455:53: warning: ‘/input1’ directive output may be truncated writing 7 bytes into a region of size between 1 and 32 [-Wformat-truncation=] 455 | snprintf(priv->phys, sizeof(priv->phys), "%s/input1", | ^~~~~~~ drivers/input/mouse/vmmouse.c:455:9: note: ‘snprintf’ output between 8 and 39 bytes into a destination of size 32 455 | snprintf(priv->phys, sizeof(priv->phys), "%s/input1", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 456 | psmouse->ps2dev.serio->phys); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Zack Rusin <zackr(a)vmware.com> Fixes: 8b8be51b4fd3 ("Input: add vmmouse driver") Cc: Dmitry Torokhov <dmitry.torokhov(a)gmail.com> Cc: VMware Graphics Reviewers <linux-graphics-maintainer(a)vmware.com> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Robert Jarzmik <robert.jarzmik(a)free.fr> Cc: Raul Rangel <rrangel(a)chromium.org> Cc: linux-input(a)vger.kernel.org Cc: <stable(a)vger.kernel.org> # v4.1+ --- drivers/input/mouse/vmmouse.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/mouse/vmmouse.c b/drivers/input/mouse/vmmouse.c index ea9eff7c8099..7248cada4c8c 100644 --- a/drivers/input/mouse/vmmouse.c +++ b/drivers/input/mouse/vmmouse.c @@ -72,7 +72,7 @@ */ struct vmmouse_data { struct input_dev *abs_dev; - char phys[32]; + char phys[64]; char dev_name[128]; }; -- 2.39.2

1 year, 1 month

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FAILED: patch "[PATCH] block: Don't invalidate pagecache for invalid falloc modes" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 1364a3c391aedfeb32aa025303ead3d7c91cdf9d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023101512-hurt-guise-534b@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 1364a3c391ae ("block: Don't invalidate pagecache for invalid falloc modes") 05bdb9965305 ("block: replace fmode_t with a block-specific type for block open flags") 5e4ea834676e ("block: remove unused fmode_t arguments from ioctl handlers") cfb425761c79 ("block: move a few internal definitions out of blkdev.h") 99b07780814e ("rnbd-srv: replace sess->open_flags with a "bool readonly"") 658afed19cee ("mtd: block: use a simple bool to track open for write") 7d9d7d59d44b ("nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool") 2e80089c1824 ("scsi: replace the fmode_t argument to scsi_ioctl with a simple bool") 5f4eb9d5413f ("scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool") 81b1fb7d17c0 ("fs: remove sb->s_mode") 3f0b3e785e8b ("block: add a sb_open_mode helper") 2736e8eeb0cc ("block: use the holder as indication for exclusive opens") 2ef789288afd ("btrfs: don't pass a holder for non-exclusive blkdev_get_by_path") 29499ab060fe ("bcache: don't pass a stack address to blkdev_get_by_path") c889d0793d9d ("swsusp: don't pass a stack address to blkdev_get_by_path") ae220766d87c ("block: remove the unused mode argument to ->release") d32e2bf83791 ("block: pass a gendisk to ->open") 444aa2c58cb3 ("block: pass a gendisk on bdev_check_media_change") 7ae24fcee992 ("cdrom: remove the unused mode argument to cdrom_release") 473399b50de1 ("cdrom: remove the unused mode argument to cdrom_ioctl") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1364a3c391aedfeb32aa025303ead3d7c91cdf9d Mon Sep 17 00:00:00 2001 From: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Date: Wed, 11 Oct 2023 13:12:30 -0700 Subject: [PATCH] block: Don't invalidate pagecache for invalid falloc modes Only call truncate_bdev_range() if the fallocate mode is supported. This fixes a bug where data in the pagecache could be invalidated if the fallocate() was called on the block device with an invalid mode. Fixes: 25f4c41415e5 ("block: implement (some of) fallocate for block devices") Cc: stable(a)vger.kernel.org Reported-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> Reviewed-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Mike Snitzer <snitzer(a)kernel.org> Fixes: line? I've never seen those wrapped. Link: https://lore.kernel.org/r/20231011201230.750105-1-sarthakkukreti@chromium.o… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/block/fops.c b/block/fops.c index acff3d5d22d4..73e42742543f 100644 --- a/block/fops.c +++ b/block/fops.c @@ -772,24 +772,35 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, filemap_invalidate_lock(inode->i_mapping); - /* Invalidate the page cache, including dirty pages. */ - error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); - if (error) - goto fail; - + /* + * Invalidate the page cache, including dirty pages, for valid + * de-allocate mode calls to fallocate(). + */ switch (mode) { case FALLOC_FL_ZERO_RANGE: case FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOUNMAP); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOFALLBACK); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL); break;

1 year, 1 month

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FAILED: patch "[PATCH] block: Don't invalidate pagecache for invalid falloc modes" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 1364a3c391aedfeb32aa025303ead3d7c91cdf9d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023101513-depraved-ecosphere-6b50@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: 1364a3c391ae ("block: Don't invalidate pagecache for invalid falloc modes") 05bdb9965305 ("block: replace fmode_t with a block-specific type for block open flags") 5e4ea834676e ("block: remove unused fmode_t arguments from ioctl handlers") cfb425761c79 ("block: move a few internal definitions out of blkdev.h") 99b07780814e ("rnbd-srv: replace sess->open_flags with a "bool readonly"") 658afed19cee ("mtd: block: use a simple bool to track open for write") 7d9d7d59d44b ("nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool") 2e80089c1824 ("scsi: replace the fmode_t argument to scsi_ioctl with a simple bool") 5f4eb9d5413f ("scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool") 81b1fb7d17c0 ("fs: remove sb->s_mode") 3f0b3e785e8b ("block: add a sb_open_mode helper") 2736e8eeb0cc ("block: use the holder as indication for exclusive opens") 2ef789288afd ("btrfs: don't pass a holder for non-exclusive blkdev_get_by_path") 29499ab060fe ("bcache: don't pass a stack address to blkdev_get_by_path") c889d0793d9d ("swsusp: don't pass a stack address to blkdev_get_by_path") ae220766d87c ("block: remove the unused mode argument to ->release") d32e2bf83791 ("block: pass a gendisk to ->open") 444aa2c58cb3 ("block: pass a gendisk on bdev_check_media_change") 7ae24fcee992 ("cdrom: remove the unused mode argument to cdrom_release") 473399b50de1 ("cdrom: remove the unused mode argument to cdrom_ioctl") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1364a3c391aedfeb32aa025303ead3d7c91cdf9d Mon Sep 17 00:00:00 2001 From: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Date: Wed, 11 Oct 2023 13:12:30 -0700 Subject: [PATCH] block: Don't invalidate pagecache for invalid falloc modes Only call truncate_bdev_range() if the fallocate mode is supported. This fixes a bug where data in the pagecache could be invalidated if the fallocate() was called on the block device with an invalid mode. Fixes: 25f4c41415e5 ("block: implement (some of) fallocate for block devices") Cc: stable(a)vger.kernel.org Reported-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> Reviewed-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Mike Snitzer <snitzer(a)kernel.org> Fixes: line? I've never seen those wrapped. Link: https://lore.kernel.org/r/20231011201230.750105-1-sarthakkukreti@chromium.o… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/block/fops.c b/block/fops.c index acff3d5d22d4..73e42742543f 100644 --- a/block/fops.c +++ b/block/fops.c @@ -772,24 +772,35 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, filemap_invalidate_lock(inode->i_mapping); - /* Invalidate the page cache, including dirty pages. */ - error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); - if (error) - goto fail; - + /* + * Invalidate the page cache, including dirty pages, for valid + * de-allocate mode calls to fallocate(). + */ switch (mode) { case FALLOC_FL_ZERO_RANGE: case FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOUNMAP); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOFALLBACK); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL); break;

1 year, 1 month

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FAILED: patch "[PATCH] block: Don't invalidate pagecache for invalid falloc modes" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 1364a3c391aedfeb32aa025303ead3d7c91cdf9d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023101515-buffing-copy-1686@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: 1364a3c391ae ("block: Don't invalidate pagecache for invalid falloc modes") 05bdb9965305 ("block: replace fmode_t with a block-specific type for block open flags") 5e4ea834676e ("block: remove unused fmode_t arguments from ioctl handlers") cfb425761c79 ("block: move a few internal definitions out of blkdev.h") 99b07780814e ("rnbd-srv: replace sess->open_flags with a "bool readonly"") 658afed19cee ("mtd: block: use a simple bool to track open for write") 7d9d7d59d44b ("nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool") 2e80089c1824 ("scsi: replace the fmode_t argument to scsi_ioctl with a simple bool") 5f4eb9d5413f ("scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool") 81b1fb7d17c0 ("fs: remove sb->s_mode") 3f0b3e785e8b ("block: add a sb_open_mode helper") 2736e8eeb0cc ("block: use the holder as indication for exclusive opens") 2ef789288afd ("btrfs: don't pass a holder for non-exclusive blkdev_get_by_path") 29499ab060fe ("bcache: don't pass a stack address to blkdev_get_by_path") c889d0793d9d ("swsusp: don't pass a stack address to blkdev_get_by_path") ae220766d87c ("block: remove the unused mode argument to ->release") d32e2bf83791 ("block: pass a gendisk to ->open") 444aa2c58cb3 ("block: pass a gendisk on bdev_check_media_change") 7ae24fcee992 ("cdrom: remove the unused mode argument to cdrom_release") 473399b50de1 ("cdrom: remove the unused mode argument to cdrom_ioctl") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1364a3c391aedfeb32aa025303ead3d7c91cdf9d Mon Sep 17 00:00:00 2001 From: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Date: Wed, 11 Oct 2023 13:12:30 -0700 Subject: [PATCH] block: Don't invalidate pagecache for invalid falloc modes Only call truncate_bdev_range() if the fallocate mode is supported. This fixes a bug where data in the pagecache could be invalidated if the fallocate() was called on the block device with an invalid mode. Fixes: 25f4c41415e5 ("block: implement (some of) fallocate for block devices") Cc: stable(a)vger.kernel.org Reported-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> Reviewed-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Mike Snitzer <snitzer(a)kernel.org> Fixes: line? I've never seen those wrapped. Link: https://lore.kernel.org/r/20231011201230.750105-1-sarthakkukreti@chromium.o… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/block/fops.c b/block/fops.c index acff3d5d22d4..73e42742543f 100644 --- a/block/fops.c +++ b/block/fops.c @@ -772,24 +772,35 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, filemap_invalidate_lock(inode->i_mapping); - /* Invalidate the page cache, including dirty pages. */ - error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); - if (error) - goto fail; - + /* + * Invalidate the page cache, including dirty pages, for valid + * de-allocate mode calls to fallocate(). + */ switch (mode) { case FALLOC_FL_ZERO_RANGE: case FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOUNMAP); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOFALLBACK); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL); break;

1 year, 1 month

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FAILED: patch "[PATCH] block: Don't invalidate pagecache for invalid falloc modes" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 1364a3c391aedfeb32aa025303ead3d7c91cdf9d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023101516-genetics-gratify-225c@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: 1364a3c391ae ("block: Don't invalidate pagecache for invalid falloc modes") 05bdb9965305 ("block: replace fmode_t with a block-specific type for block open flags") 5e4ea834676e ("block: remove unused fmode_t arguments from ioctl handlers") cfb425761c79 ("block: move a few internal definitions out of blkdev.h") 99b07780814e ("rnbd-srv: replace sess->open_flags with a "bool readonly"") 658afed19cee ("mtd: block: use a simple bool to track open for write") 7d9d7d59d44b ("nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool") 2e80089c1824 ("scsi: replace the fmode_t argument to scsi_ioctl with a simple bool") 5f4eb9d5413f ("scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool") 81b1fb7d17c0 ("fs: remove sb->s_mode") 3f0b3e785e8b ("block: add a sb_open_mode helper") 2736e8eeb0cc ("block: use the holder as indication for exclusive opens") 2ef789288afd ("btrfs: don't pass a holder for non-exclusive blkdev_get_by_path") 29499ab060fe ("bcache: don't pass a stack address to blkdev_get_by_path") c889d0793d9d ("swsusp: don't pass a stack address to blkdev_get_by_path") ae220766d87c ("block: remove the unused mode argument to ->release") d32e2bf83791 ("block: pass a gendisk to ->open") 444aa2c58cb3 ("block: pass a gendisk on bdev_check_media_change") 7ae24fcee992 ("cdrom: remove the unused mode argument to cdrom_release") 473399b50de1 ("cdrom: remove the unused mode argument to cdrom_ioctl") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1364a3c391aedfeb32aa025303ead3d7c91cdf9d Mon Sep 17 00:00:00 2001 From: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Date: Wed, 11 Oct 2023 13:12:30 -0700 Subject: [PATCH] block: Don't invalidate pagecache for invalid falloc modes Only call truncate_bdev_range() if the fallocate mode is supported. This fixes a bug where data in the pagecache could be invalidated if the fallocate() was called on the block device with an invalid mode. Fixes: 25f4c41415e5 ("block: implement (some of) fallocate for block devices") Cc: stable(a)vger.kernel.org Reported-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Sarthak Kukreti <sarthakkukreti(a)chromium.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> Reviewed-by: "Darrick J. Wong" <djwong(a)kernel.org> Signed-off-by: Mike Snitzer <snitzer(a)kernel.org> Fixes: line? I've never seen those wrapped. Link: https://lore.kernel.org/r/20231011201230.750105-1-sarthakkukreti@chromium.o… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/block/fops.c b/block/fops.c index acff3d5d22d4..73e42742543f 100644 --- a/block/fops.c +++ b/block/fops.c @@ -772,24 +772,35 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, filemap_invalidate_lock(inode->i_mapping); - /* Invalidate the page cache, including dirty pages. */ - error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); - if (error) - goto fail; - + /* + * Invalidate the page cache, including dirty pages, for valid + * de-allocate mode calls to fallocate(). + */ switch (mode) { case FALLOC_FL_ZERO_RANGE: case FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOUNMAP); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOFALLBACK); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); + if (error) + goto fail; + error = blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL); break;

1 year, 1 month

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[PATCH] KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache

by Oliver Upton

There is a potential UAF scenario in the case of an LPI translation cache hit racing with an operation that invalidates the cache, such as a DISCARD ITS command. The root of the problem is that vgic_its_check_cache() does not elevate the refcount on the vgic_irq before dropping the lock that serializes refcount changes. Have vgic_its_check_cache() raise the refcount on the returned vgic_irq and add the corresponding decrement after queueing the interrupt. Cc: stable(a)vger.kernel.org Signed-off-by: Oliver Upton <oliver.upton(a)linux.dev> --- arch/arm64/kvm/vgic/vgic-its.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/kvm/vgic/vgic-its.c b/arch/arm64/kvm/vgic/vgic-its.c index 2dad2d095160..e2764d0ffa9f 100644 --- a/arch/arm64/kvm/vgic/vgic-its.c +++ b/arch/arm64/kvm/vgic/vgic-its.c @@ -590,7 +590,11 @@ static struct vgic_irq *vgic_its_check_cache(struct kvm *kvm, phys_addr_t db, unsigned long flags; raw_spin_lock_irqsave(&dist->lpi_list_lock, flags); + irq = __vgic_its_check_cache(dist, db, devid, eventid); + if (irq) + vgic_get_irq_kref(irq); + raw_spin_unlock_irqrestore(&dist->lpi_list_lock, flags); return irq; @@ -769,6 +773,7 @@ int vgic_its_inject_cached_translation(struct kvm *kvm, struct kvm_msi *msi) raw_spin_lock_irqsave(&irq->irq_lock, flags); irq->pending_latch = true; vgic_queue_irq_unlock(kvm, irq, flags); + vgic_put_irq(kvm, irq); return 0; } base-commit: 33cc938e65a98f1d29d0a18403dbbee050dcad9a -- 2.43.0.472.g3155946c3a-goog

1 year, 1 month

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[PATCH] KVM: x86/pmu: fix masking logic for MSR_CORE_PERF_GLOBAL_CTRL

by Paolo Bonzini

When commit c59a1f106f5c ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS") switched the initialization of cpuc->guest_switch_msrs to use compound literals, it screwed up the boolean logic: + u64 pebs_mask = cpuc->pebs_enabled & x86_pmu.pebs_capable; ... - arr[0].guest = intel_ctrl & ~cpuc->intel_ctrl_host_mask; - arr[0].guest &= ~(cpuc->pebs_enabled & x86_pmu.pebs_capable); + .guest = intel_ctrl & (~cpuc->intel_ctrl_host_mask | ~pebs_mask), Before the patch, the value of arr[0].guest would have been intel_ctrl & ~cpuc->intel_ctrl_host_mask & ~pebs_mask. The intent is to always treat PEBS events as host-only because, while the guest runs, there is no way to tell the processor about the virtual address where to put PEBS records intended for the host. Unfortunately, the new expression can be expanded to (intel_ctrl & ~cpuc->intel_ctrl_host_mask) | (intel_ctrl & ~pebs_mask) which makes no sense; it includes any bit that isn't *both* marked as exclude_guest and using PEBS. So, reinstate the old logic. Another way to write it could be "intel_ctrl & ~(cpuc->intel_ctrl_host_mask | pebs_mask)", presumably the intention of the author of the faulty. However, I personally find the repeated application of A AND NOT B to be a bit more readable. This shows up as guest failures when running concurrent long-running perf workloads on the host, and was reported to happen with rcutorture. All guests on a given host would die simultaneously with something like an instruction fault or a segmentation violation. Reported-by: Paul E. McKenney <paulmck(a)kernel.org> Analyzed-by: Sean Christopherson <seanjc(a)google.com> Tested-by: Paul E. McKenney <paulmck(a)kernel.org> Cc: stable(a)vger.kernel.org Fixes: c59a1f106f5c ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS") Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> --- arch/x86/events/intel/core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index ce1c777227b4..0f2786d4e405 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -4051,12 +4051,17 @@ static struct perf_guest_switch_msr *intel_guest_get_msrs(int *nr, void *data) u64 pebs_mask = cpuc->pebs_enabled & x86_pmu.pebs_capable; int global_ctrl, pebs_enable; + /* + * In addition to obeying exclude_guest/exclude_host, remove bits being + * used for PEBS when running a guest, because PEBS writes to virtual + * addresses (not physical addresses). + */ *nr = 0; global_ctrl = (*nr)++; arr[global_ctrl] = (struct perf_guest_switch_msr){ .msr = MSR_CORE_PERF_GLOBAL_CTRL, .host = intel_ctrl & ~cpuc->intel_ctrl_guest_mask, - .guest = intel_ctrl & (~cpuc->intel_ctrl_host_mask | ~pebs_mask), + .guest = intel_ctrl & ~cpuc->intel_ctrl_host_mask & ~pebs_mask, }; if (!x86_pmu.pebs) -- 2.43.0

1 year, 1 month

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Re: [PATCH v3] rootfs: Fix support for rootfstype= when root= is given

by Askar Safin

On Sun, Nov 19, 2023 at 08:12:48PM -0500, Stefan Berger wrote: > Documentation/filesystems/ramfs-rootfs-initramfs.rst states: > > If CONFIG_TMPFS is enabled, rootfs will use tmpfs instead of ramfs by > default. To force ramfs, add "rootfstype=ramfs" to the kernel command > line. > > This currently does not work when root= is provided since then > saved_root_name contains a string and rootfstype= is ignored. Therefore, > ramfs is currently always chosen when root= is provided. Maybe it is a good idea to just fully remove ramfs? initramfs will always be tmpfs. And tmpfs will always be enabled. As well as I understand, ramfs was originally introduced, because tmpfs seemed too big. So, it seemed to be a good idea to have small fs (ramfs), which is always enabled. I just did an experiment. I compiled the kernel with a very small config. And without TMPFS and SHMEM. I got 1059440 bytes image. Then I enabled TMPFS and SHMEM, and I got 1072976 bytes. So tmpfs adds 13536 bytes, i. e. 14k, which is a very small amount. It adds 1.3 % to the kernel even with very small config. So I propose to remove ramfs and always enable tmpfs. This will decrease complexity. Here are my configs (x86_64). Just enough to run busybox in "qemu -serial stdio" make KCONFIG_ALLCONFIG="$FILE" allnoconfig CONFIG_64BIT=y CONFIG_PRINTK=y CONFIG_SERIAL_8250=y CONFIG_TTY=y CONFIG_SERIAL_8250_CONSOLE=y CONFIG_BLK_DEV_INITRD=y CONFIG_RD_GZIP=y CONFIG_BINFMT_ELF=y CONFIG_EMBEDDED=y CONFIG_EXPERT=y CONFIG_TMPFS=n # Try to change this to "y" CONFIG_SHMEM=n # Try to change this to "y" Here is full docker reproducer: # Reproducible # 20230227 = 20230227T000000Z = 20230226T090712Z FROM debian:sid-20230227 ENV LC_ALL C.UTF-8 RUN sed -i 's~^URIs:.*$~URIs: http://snapshot.debian.org/archive/debian/20230226T090712Z~' /etc/apt/sources.list.d/debian.sources RUN echo 'Acquire::Check-Valid-Until "false";' > /etc/apt/apt.conf.d/02acquire-check-valid-until RUN apt-get update && apt-get install -y apt-utils whiptail RUN apt-get update && apt-get install -y busybox-static qemu-system-x86 make gcc git flex bison bc libelf-dev less nano cpio RUN git clone --depth=1 -b v6.2 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git RUN : > /.config # See Linux f8f0d06438e5c810d1e13b5f8c2fed501fe36e9c RUN echo 'CONFIG_64BIT=y' >> /.config RUN echo 'CONFIG_PRINTK=y' >> /.config RUN echo 'CONFIG_SERIAL_8250=y' >> /.config RUN echo 'CONFIG_TTY=y' >> /.config RUN echo 'CONFIG_SERIAL_8250_CONSOLE=y' >> /.config RUN echo 'CONFIG_BLK_DEV_INITRD=y' >> /.config RUN echo 'CONFIG_RD_GZIP=y' >> /.config RUN echo 'CONFIG_BINFMT_ELF=y' >> /.config RUN echo 'CONFIG_EMBEDDED=y' >> /.config RUN echo 'CONFIG_EXPERT=y' >> /.config RUN echo 'CONFIG_TMPFS=y' >> /.config # try "n" RUN echo 'CONFIG_SHMEM=y' >> /.config # try "n" RUN cd linux && make KCONFIG_ALLCONFIG=/.config allnoconfig RUN cd linux && make -j4 RUN mkdir /initramfs && cp /bin/busybox /initramfs && cd /initramfs && ln -s busybox sh && find . | cpio --create --format=newc --quiet | gzip > /initramfs.cpio.gz RUN echo "qemu-system-x86_64 -M microvm -m 64M -serial stdio -display none -kernel /linux/arch/x86/boot/bzImage -initrd /initramfs.cpio.gz -append 'quiet console=ttyS0 earlyprintk=ttyS0 rdinit=/sh' -nodefaults -no-user-config" > /root/.bash_history -- Askar Safin

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