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[Linux-stable-mirror] Patch "md: free unused memory after bitmap resize" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled md: free unused memory after bitmap resize to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: md-free-unused-memory-after-bitmap-resize.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Zdenek Kabelac <zkabelac(a)redhat.com> Date: Wed, 8 Nov 2017 13:44:56 +0100 Subject: md: free unused memory after bitmap resize From: Zdenek Kabelac <zkabelac(a)redhat.com> [ Upstream commit 0868b99c214a3d55486c700de7c3f770b7243e7c ] When bitmap is resized, the old kalloced chunks just are not released once the resized bitmap starts to use new space. This fixes in particular kmemleak reports like this one: unreferenced object 0xffff8f4311e9c000 (size 4096): comm "lvm", pid 19333, jiffies 4295263268 (age 528.265s) hex dump (first 32 bytes): 02 80 02 80 02 80 02 80 02 80 02 80 02 80 02 80 ................ 02 80 02 80 02 80 02 80 02 80 02 80 02 80 02 80 ................ backtrace: [<ffffffffa69471ca>] kmemleak_alloc+0x4a/0xa0 [<ffffffffa628c10e>] kmem_cache_alloc_trace+0x14e/0x2e0 [<ffffffffa676cfec>] bitmap_checkpage+0x7c/0x110 [<ffffffffa676d0c5>] bitmap_get_counter+0x45/0xd0 [<ffffffffa676d6b3>] bitmap_set_memory_bits+0x43/0xe0 [<ffffffffa676e41c>] bitmap_init_from_disk+0x23c/0x530 [<ffffffffa676f1ae>] bitmap_load+0xbe/0x160 [<ffffffffc04c47d3>] raid_preresume+0x203/0x2f0 [dm_raid] [<ffffffffa677762f>] dm_table_resume_targets+0x4f/0xe0 [<ffffffffa6774b52>] dm_resume+0x122/0x140 [<ffffffffa6779b9f>] dev_suspend+0x18f/0x290 [<ffffffffa677a3a7>] ctl_ioctl+0x287/0x560 [<ffffffffa677a693>] dm_ctl_ioctl+0x13/0x20 [<ffffffffa62d6b46>] do_vfs_ioctl+0xa6/0x750 [<ffffffffa62d7269>] SyS_ioctl+0x79/0x90 [<ffffffffa6956d41>] entry_SYSCALL_64_fastpath+0x1f/0xc2 Signed-off-by: Zdenek Kabelac <zkabelac(a)redhat.com> Signed-off-by: Shaohua Li <shli(a)fb.com> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/md/bitmap.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -2084,6 +2084,7 @@ int bitmap_resize(struct bitmap *bitmap, for (k = 0; k < page; k++) { kfree(new_bp[k].map); } + kfree(new_bp); /* restore some fields from old_counts */ bitmap->counts.bp = old_counts.bp; @@ -2134,6 +2135,14 @@ int bitmap_resize(struct bitmap *bitmap, block += old_blocks; } + if (bitmap->counts.bp != old_counts.bp) { + unsigned long k; + for (k = 0; k < old_counts.pages; k++) + if (!old_counts.bp[k].hijacked) + kfree(old_counts.bp[k].map); + kfree(old_counts.bp); + } + if (!init) { int i; while (block < (chunks << chunkshift)) { Patches currently in stable-queue which might be from zkabelac(a)redhat.com are queue-4.9/md-free-unused-memory-after-bitmap-resize.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "mac80211_hwsim: Fix memory leak in hwsim_new_radio_nl()" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mac80211_hwsim: Fix memory leak in hwsim_new_radio_nl() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mac80211_hwsim-fix-memory-leak-in-hwsim_new_radio_nl.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Date: Fri, 10 Nov 2017 18:48:50 +0000 Subject: mac80211_hwsim: Fix memory leak in hwsim_new_radio_nl() From: Ben Hutchings <ben.hutchings(a)codethink.co.uk> [ Upstream commit 67bd52386125ce1159c0581cbcd2740addf33cd4 ] hwsim_new_radio_nl() now copies the name attribute in order to add a null-terminator. mac80211_hwsim_new_radio() (indirectly) copies it again into the net_device structure, so the first copy is not used or freed later. Free the first copy before returning. Fixes: ff4dd73dd2b4 ("mac80211_hwsim: check HWSIM_ATTR_RADIO_NAME length") Signed-off-by: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/net/wireless/mac80211_hwsim.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -3047,6 +3047,7 @@ static int hwsim_new_radio_nl(struct sk_ { struct hwsim_new_radio_params param = { 0 }; const char *hwname = NULL; + int ret; param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG]; param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE]; @@ -3086,7 +3087,9 @@ static int hwsim_new_radio_nl(struct sk_ param.regd = hwsim_world_regdom_custom[idx]; } - return mac80211_hwsim_new_radio(info, &param); + ret = mac80211_hwsim_new_radio(info, &param); + kfree(hwname); + return ret; } static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info) Patches currently in stable-queue which might be from ben.hutchings(a)codethink.co.uk are queue-4.9/mac80211_hwsim-fix-memory-leak-in-hwsim_new_radio_nl.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "libata: drop WARN from protocol error in ata_sff_qc_issue()" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled libata: drop WARN from protocol error in ata_sff_qc_issue() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: libata-drop-warn-from-protocol-error-in-ata_sff_qc_issue.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Tejun Heo <tj(a)kernel.org> Date: Mon, 6 Mar 2017 15:26:54 -0500 Subject: libata: drop WARN from protocol error in ata_sff_qc_issue() From: Tejun Heo <tj(a)kernel.org> [ Upstream commit 0580b762a4d6b70817476b90042813f8573283fa ] ata_sff_qc_issue() expects upper layers to never issue commands on a command protocol that it doesn't implement. While the assumption holds fine with the usual IO path, nothing filters based on the command protocol in the passthrough path (which was added later), allowing the warning to be tripped with a passthrough command with the right (well, wrong) protocol. Failing with AC_ERR_SYSTEM is the right thing to do anyway. Remove the unnecessary WARN. Reported-by: Dmitry Vyukov <dvyukov(a)google.com> Link: http://lkml.kernel.org/r/CACT4Y+bXkvevNZU8uP6X0QVqsj6wNoUA_1exfTSOzc+SmUtMO… Signed-off-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/ata/libata-sff.c | 1 - 1 file changed, 1 deletion(-) --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -1481,7 +1481,6 @@ unsigned int ata_sff_qc_issue(struct ata break; default: - WARN_ON_ONCE(1); return AC_ERR_SYSTEM; } Patches currently in stable-queue which might be from tj(a)kernel.org are queue-4.9/libata-drop-warn-from-protocol-error-in-ata_sff_qc_issue.patch queue-4.9/workqueue-trigger-warn-if-queue_delayed_work-is-called-with-null-wq.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "[media] lirc: fix dead lock between open and wakeup_filter" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [media] lirc: fix dead lock between open and wakeup_filter to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: lirc-fix-dead-lock-between-open-and-wakeup_filter.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Sean Young <sean(a)mess.org> Date: Mon, 13 Feb 2017 10:35:44 -0200 Subject: [media] lirc: fix dead lock between open and wakeup_filter From: Sean Young <sean(a)mess.org> [ Upstream commit db5b15b74ed9a5c04bb808d18ffa2c773f5c18c0 ] The locking in lirc needs improvement, but for now just fix this potential deadlock. ====================================================== [ INFO: possible circular locking dependency detected ] 4.10.0-rc1+ #1 Not tainted ------------------------------------------------------- bash/2502 is trying to acquire lock: (ir_raw_handler_lock){+.+.+.}, at: [<ffffffffc06f6a5e>] ir_raw_encode_scancode+0x3e/0xb0 [rc_core] but task is already holding lock: (&dev->lock){+.+.+.}, at: [<ffffffffc06f511f>] store_filter+0x9f/0x240 [rc_core] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&dev->lock){+.+.+.}: [<ffffffffa110adad>] lock_acquire+0xfd/0x200 [<ffffffffa1921327>] mutex_lock_nested+0x77/0x6d0 [<ffffffffc06f436a>] rc_open+0x2a/0x80 [rc_core] [<ffffffffc07114ca>] lirc_dev_fop_open+0xda/0x1e0 [lirc_dev] [<ffffffffa12975e0>] chrdev_open+0xb0/0x210 [<ffffffffa128eb5a>] do_dentry_open+0x20a/0x2f0 [<ffffffffa128ffcc>] vfs_open+0x4c/0x80 [<ffffffffa12a35ec>] path_openat+0x5bc/0xc00 [<ffffffffa12a5271>] do_filp_open+0x91/0x100 [<ffffffffa12903f0>] do_sys_open+0x130/0x220 [<ffffffffa12904fe>] SyS_open+0x1e/0x20 [<ffffffffa19278c1>] entry_SYSCALL_64_fastpath+0x1f/0xc2 -> #1 (lirc_dev_lock){+.+.+.}: [<ffffffffa110adad>] lock_acquire+0xfd/0x200 [<ffffffffa1921327>] mutex_lock_nested+0x77/0x6d0 [<ffffffffc0711f47>] lirc_register_driver+0x67/0x59b [lirc_dev] [<ffffffffc06db7f4>] ir_lirc_register+0x1f4/0x260 [ir_lirc_codec] [<ffffffffc06f6cac>] ir_raw_handler_register+0x7c/0xb0 [rc_core] [<ffffffffc0398010>] 0xffffffffc0398010 [<ffffffffa1002192>] do_one_initcall+0x52/0x1b0 [<ffffffffa11ef5c8>] do_init_module+0x5f/0x1fa [<ffffffffa11566b5>] load_module+0x2675/0x2b00 [<ffffffffa1156dcf>] SYSC_finit_module+0xdf/0x110 [<ffffffffa1156e1e>] SyS_finit_module+0xe/0x10 [<ffffffffa1003f5c>] do_syscall_64+0x6c/0x1f0 [<ffffffffa1927989>] return_from_SYSCALL_64+0x0/0x7a -> #0 (ir_raw_handler_lock){+.+.+.}: [<ffffffffa110a7b7>] __lock_acquire+0x10f7/0x1290 [<ffffffffa110adad>] lock_acquire+0xfd/0x200 [<ffffffffa1921327>] mutex_lock_nested+0x77/0x6d0 [<ffffffffc06f6a5e>] ir_raw_encode_scancode+0x3e/0xb0 [rc_core] [<ffffffffc0b0f492>] loop_set_wakeup_filter+0x62/0xbd [rc_loopback] [<ffffffffc06f522a>] store_filter+0x1aa/0x240 [rc_core] [<ffffffffa15e46f8>] dev_attr_store+0x18/0x30 [<ffffffffa13318e5>] sysfs_kf_write+0x45/0x60 [<ffffffffa1330b55>] kernfs_fop_write+0x155/0x1e0 [<ffffffffa1290797>] __vfs_write+0x37/0x160 [<ffffffffa12921f8>] vfs_write+0xc8/0x1e0 [<ffffffffa12936e8>] SyS_write+0x58/0xc0 [<ffffffffa19278c1>] entry_SYSCALL_64_fastpath+0x1f/0xc2 other info that might help us debug this: Chain exists of: ir_raw_handler_lock --> lirc_dev_lock --> &dev->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&dev->lock); lock(lirc_dev_lock); lock(&dev->lock); lock(ir_raw_handler_lock); *** DEADLOCK *** 4 locks held by bash/2502: #0: (sb_writers#4){.+.+.+}, at: [<ffffffffa12922c5>] vfs_write+0x195/0x1e0 #1: (&of->mutex){+.+.+.}, at: [<ffffffffa1330b1f>] kernfs_fop_write+0x11f/0x1e0 #2: (s_active#215){.+.+.+}, at: [<ffffffffa1330b28>] kernfs_fop_write+0x128/0x1e0 #3: (&dev->lock){+.+.+.}, at: [<ffffffffc06f511f>] store_filter+0x9f/0x240 [rc_core] stack backtrace: CPU: 3 PID: 2502 Comm: bash Not tainted 4.10.0-rc1+ #1 Hardware name: /DG45ID, BIOS IDG4510H.86A.0135.2011.0225.1100 02/25/2011 Call Trace: dump_stack+0x86/0xc3 print_circular_bug+0x1be/0x210 __lock_acquire+0x10f7/0x1290 lock_acquire+0xfd/0x200 ? ir_raw_encode_scancode+0x3e/0xb0 [rc_core] ? ir_raw_encode_scancode+0x3e/0xb0 [rc_core] mutex_lock_nested+0x77/0x6d0 ? ir_raw_encode_scancode+0x3e/0xb0 [rc_core] ? loop_set_wakeup_filter+0x44/0xbd [rc_loopback] ir_raw_encode_scancode+0x3e/0xb0 [rc_core] loop_set_wakeup_filter+0x62/0xbd [rc_loopback] ? loop_set_tx_duty_cycle+0x70/0x70 [rc_loopback] store_filter+0x1aa/0x240 [rc_core] dev_attr_store+0x18/0x30 sysfs_kf_write+0x45/0x60 kernfs_fop_write+0x155/0x1e0 __vfs_write+0x37/0x160 ? rcu_read_lock_sched_held+0x4a/0x80 ? rcu_sync_lockdep_assert+0x2f/0x60 ? __sb_start_write+0x10c/0x220 ? vfs_write+0x195/0x1e0 ? security_file_permission+0x3b/0xc0 vfs_write+0xc8/0x1e0 SyS_write+0x58/0xc0 entry_SYSCALL_64_fastpath+0x1f/0xc2 Signed-off-by: Sean Young <sean(a)mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab(a)s-opensource.com> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/media/rc/lirc_dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -446,6 +446,8 @@ int lirc_dev_fop_open(struct inode *inod return -ERESTARTSYS; ir = irctls[iminor(inode)]; + mutex_unlock(&lirc_dev_lock); + if (!ir) { retval = -ENODEV; goto error; @@ -486,8 +488,6 @@ int lirc_dev_fop_open(struct inode *inod } error: - mutex_unlock(&lirc_dev_lock); - nonseekable_open(inode, file); return retval; Patches currently in stable-queue which might be from sean(a)mess.org are queue-4.9/lirc-fix-dead-lock-between-open-and-wakeup_filter.patch queue-4.9/media-dvb-i2c-transfers-over-usb-cannot-be-done-from-stack.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "lib/genalloc.c: make the avail variable an atomic_long_t" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled lib/genalloc.c: make the avail variable an atomic_long_t to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: lib-genalloc.c-make-the-avail-variable-an-atomic_long_t.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Stephen Bates <sbates(a)raithlin.com> Date: Fri, 17 Nov 2017 15:28:16 -0800 Subject: lib/genalloc.c: make the avail variable an atomic_long_t From: Stephen Bates <sbates(a)raithlin.com> [ Upstream commit 36a3d1dd4e16bcd0d2ddfb4a2ec7092f0ae0d931 ] If the amount of resources allocated to a gen_pool exceeds 2^32 then the avail atomic overflows and this causes problems when clients try and borrow resources from the pool. This is only expected to be an issue on 64 bit systems. Add the <linux/atomic.h> header to pull in atomic_long* operations. So that 32 bit systems continue to use atomic32_t but 64 bit systems can use atomic64_t. Link: http://lkml.kernel.org/r/1509033843-25667-1-git-send-email-sbates@raithlin.… Signed-off-by: Stephen Bates <sbates(a)raithlin.com> Reviewed-by: Logan Gunthorpe <logang(a)deltatee.com> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Reviewed-by: Daniel Mentz <danielmentz(a)google.com> Cc: Jonathan Corbet <corbet(a)lwn.net> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- include/linux/genalloc.h | 3 ++- lib/genalloc.c | 10 +++++----- 2 files changed, 7 insertions(+), 6 deletions(-) --- a/include/linux/genalloc.h +++ b/include/linux/genalloc.h @@ -32,6 +32,7 @@ #include <linux/types.h> #include <linux/spinlock_types.h> +#include <linux/atomic.h> struct device; struct device_node; @@ -70,7 +71,7 @@ struct gen_pool { */ struct gen_pool_chunk { struct list_head next_chunk; /* next chunk in pool */ - atomic_t avail; + atomic_long_t avail; phys_addr_t phys_addr; /* physical starting address of memory chunk */ unsigned long start_addr; /* start address of memory chunk */ unsigned long end_addr; /* end address of memory chunk (inclusive) */ --- a/lib/genalloc.c +++ b/lib/genalloc.c @@ -194,7 +194,7 @@ int gen_pool_add_virt(struct gen_pool *p chunk->phys_addr = phys; chunk->start_addr = virt; chunk->end_addr = virt + size - 1; - atomic_set(&chunk->avail, size); + atomic_long_set(&chunk->avail, size); spin_lock(&pool->lock); list_add_rcu(&chunk->next_chunk, &pool->chunks); @@ -304,7 +304,7 @@ unsigned long gen_pool_alloc_algo(struct nbits = (size + (1UL << order) - 1) >> order; rcu_read_lock(); list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) { - if (size > atomic_read(&chunk->avail)) + if (size > atomic_long_read(&chunk->avail)) continue; start_bit = 0; @@ -324,7 +324,7 @@ retry: addr = chunk->start_addr + ((unsigned long)start_bit << order); size = nbits << order; - atomic_sub(size, &chunk->avail); + atomic_long_sub(size, &chunk->avail); break; } rcu_read_unlock(); @@ -390,7 +390,7 @@ void gen_pool_free(struct gen_pool *pool remain = bitmap_clear_ll(chunk->bits, start_bit, nbits); BUG_ON(remain); size = nbits << order; - atomic_add(size, &chunk->avail); + atomic_long_add(size, &chunk->avail); rcu_read_unlock(); return; } @@ -464,7 +464,7 @@ size_t gen_pool_avail(struct gen_pool *p rcu_read_lock(); list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) - avail += atomic_read(&chunk->avail); + avail += atomic_long_read(&chunk->avail); rcu_read_unlock(); return avail; } Patches currently in stable-queue which might be from sbates(a)raithlin.com are queue-4.9/lib-genalloc.c-make-the-avail-variable-an-atomic_long_t.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "kvm: nVMX: VMCLEAR should not cause the vCPU to shut down" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled kvm: nVMX: VMCLEAR should not cause the vCPU to shut down to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: kvm-nvmx-vmclear-should-not-cause-the-vcpu-to-shut-down.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Jim Mattson <jmattson(a)google.com> Date: Thu, 2 Mar 2017 12:41:48 -0800 Subject: kvm: nVMX: VMCLEAR should not cause the vCPU to shut down From: Jim Mattson <jmattson(a)google.com> [ Upstream commit 587d7e72aedca91cee80c0a56811649c3efab765 ] VMCLEAR should silently ignore a failure to clear the launch state of the VMCS referenced by the operand. Signed-off-by: Jim Mattson <jmattson(a)google.com> [Changed "kvm_write_guest(vcpu->kvm" to "kvm_vcpu_write_guest(vcpu".] Signed-off-by: Radim Krčmář <rkrcmar(a)redhat.com> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kvm/vmx.c | 22 ++++------------------ 1 file changed, 4 insertions(+), 18 deletions(-) --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7203,9 +7203,8 @@ static int handle_vmoff(struct kvm_vcpu static int handle_vmclear(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); + u32 zero = 0; gpa_t vmptr; - struct vmcs12 *vmcs12; - struct page *page; if (!nested_vmx_check_permission(vcpu)) return 1; @@ -7216,22 +7215,9 @@ static int handle_vmclear(struct kvm_vcp if (vmptr == vmx->nested.current_vmptr) nested_release_vmcs12(vmx); - page = nested_get_page(vcpu, vmptr); - if (page == NULL) { - /* - * For accurate processor emulation, VMCLEAR beyond available - * physical memory should do nothing at all. However, it is - * possible that a nested vmx bug, not a guest hypervisor bug, - * resulted in this case, so let's shut down before doing any - * more damage: - */ - kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); - return 1; - } - vmcs12 = kmap(page); - vmcs12->launch_state = 0; - kunmap(page); - nested_release_page(page); + kvm_vcpu_write_guest(vcpu, + vmptr + offsetof(struct vmcs12, launch_state), + &zero, sizeof(zero)); nested_free_vmcs02(vmx, vmptr); Patches currently in stable-queue which might be from jmattson(a)google.com are queue-4.9/kvm-nvmx-reset-nested_run_pending-if-the-vcpu-is-going-to-be-reset.patch queue-4.9/kvm-nvmx-vmclear-should-not-cause-the-vcpu-to-shut-down.patch queue-4.9/kvm-vmx-remove-i-o-port-0x80-bypass-on-intel-hosts.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "KVM: nVMX: reset nested_run_pending if the vCPU is going to be reset" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled KVM: nVMX: reset nested_run_pending if the vCPU is going to be reset to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: kvm-nvmx-reset-nested_run_pending-if-the-vcpu-is-going-to-be-reset.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Wanpeng Li <wanpeng.li(a)hotmail.com> Date: Mon, 6 Mar 2017 04:03:28 -0800 Subject: KVM: nVMX: reset nested_run_pending if the vCPU is going to be reset From: Wanpeng Li <wanpeng.li(a)hotmail.com> [ Upstream commit 2f707d97982286b307ef2a9b034e19aabc1abb56 ] Reported by syzkaller: WARNING: CPU: 1 PID: 27742 at arch/x86/kvm/vmx.c:11029 nested_vmx_vmexit+0x5c35/0x74d0 arch/x86/kvm/vmx.c:11029 CPU: 1 PID: 27742 Comm: a.out Not tainted 4.10.0+ #229 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:15 [inline] dump_stack+0x2ee/0x3ef lib/dump_stack.c:51 panic+0x1fb/0x412 kernel/panic.c:179 __warn+0x1c4/0x1e0 kernel/panic.c:540 warn_slowpath_null+0x2c/0x40 kernel/panic.c:583 nested_vmx_vmexit+0x5c35/0x74d0 arch/x86/kvm/vmx.c:11029 vmx_leave_nested arch/x86/kvm/vmx.c:11136 [inline] vmx_set_msr+0x1565/0x1910 arch/x86/kvm/vmx.c:3324 kvm_set_msr+0xd4/0x170 arch/x86/kvm/x86.c:1099 do_set_msr+0x11e/0x190 arch/x86/kvm/x86.c:1128 __msr_io arch/x86/kvm/x86.c:2577 [inline] msr_io+0x24b/0x450 arch/x86/kvm/x86.c:2614 kvm_arch_vcpu_ioctl+0x35b/0x46a0 arch/x86/kvm/x86.c:3497 kvm_vcpu_ioctl+0x232/0x1120 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2721 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1bf/0x1790 fs/ioctl.c:683 SYSC_ioctl fs/ioctl.c:698 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:689 entry_SYSCALL_64_fastpath+0x1f/0xc2 The syzkaller folks reported a nested_run_pending warning during userspace clear VMX capability which is exposed to L1 before. The warning gets thrown while doing (*(uint32_t*)0x20aecfe8 = (uint32_t)0x1); (*(uint32_t*)0x20aecfec = (uint32_t)0x0); (*(uint32_t*)0x20aecff0 = (uint32_t)0x3a); (*(uint32_t*)0x20aecff4 = (uint32_t)0x0); (*(uint64_t*)0x20aecff8 = (uint64_t)0x0); r[29] = syscall(__NR_ioctl, r[4], 0x4008ae89ul, 0x20aecfe8ul, 0, 0, 0, 0, 0, 0); i.e. KVM_SET_MSR ioctl with struct kvm_msrs { .nmsrs = 1, .pad = 0, .entries = { {.index = MSR_IA32_FEATURE_CONTROL, .reserved = 0, .data = 0} } } The VMLANCH/VMRESUME emulation should be stopped since the CPU is going to reset here. This patch resets the nested_run_pending since the CPU is going to be reset hence there should be nothing pending. Reported-by: Dmitry Vyukov <dvyukov(a)google.com> Suggested-by: Radim Krčmář <rkrcmar(a)redhat.com> Cc: Paolo Bonzini <pbonzini(a)redhat.com> Cc: Radim Krčmář <rkrcmar(a)redhat.com> Cc: Dmitry Vyukov <dvyukov(a)google.com> Cc: David Hildenbrand <david(a)redhat.com> Signed-off-by: Wanpeng Li <wanpeng.li(a)hotmail.com> Reviewed-by: David Hildenbrand <david(a)redhat.com> Reviewed-by: Jim Mattson <jmattson(a)google.com> Signed-off-by: Radim Krčmář <rkrcmar(a)redhat.com> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kvm/vmx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -10884,8 +10884,10 @@ static void nested_vmx_vmexit(struct kvm */ static void vmx_leave_nested(struct kvm_vcpu *vcpu) { - if (is_guest_mode(vcpu)) + if (is_guest_mode(vcpu)) { + to_vmx(vcpu)->nested.nested_run_pending = 0; nested_vmx_vmexit(vcpu, -1, 0, 0); + } free_nested(to_vmx(vcpu)); } Patches currently in stable-queue which might be from wanpeng.li(a)hotmail.com are queue-4.9/kvm-nvmx-reset-nested_run_pending-if-the-vcpu-is-going-to-be-reset.patch queue-4.9/kvm-x86-fix-apic-page-invalidation.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "KVM: arm/arm64: VGIC: Fix command handling while ITS being disabled" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled KVM: arm/arm64: VGIC: Fix command handling while ITS being disabled to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: kvm-arm-arm64-vgic-fix-command-handling-while-its-being-disabled.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Andre Przywara <andre.przywara(a)arm.com> Date: Thu, 16 Feb 2017 10:41:20 +0000 Subject: KVM: arm/arm64: VGIC: Fix command handling while ITS being disabled From: Andre Przywara <andre.przywara(a)arm.com> [ Upstream commit a5e1e6ca94a8cec51571fd62e3eaec269717969c ] The ITS spec says that ITS commands are only processed when the ITS is enabled (section 8.19.4, Enabled, bit[0]). Our emulation was not taking this into account. Fix this by checking the enabled state before handling CWRITER writes. On the other hand that means that CWRITER could advance while the ITS is disabled, and enabling it would need those commands to be processed. Fix this case as well by refactoring actual command processing and calling this from both the GITS_CWRITER and GITS_CTLR handlers. Reviewed-by: Eric Auger <eric.auger(a)redhat.com> Reviewed-by: Christoffer Dall <cdall(a)linaro.org> Signed-off-by: Andre Przywara <andre.przywara(a)arm.com> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- virt/kvm/arm/vgic/vgic-its.c | 109 +++++++++++++++++++++++++------------------ 1 file changed, 65 insertions(+), 44 deletions(-) --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -360,29 +360,6 @@ static int its_sync_lpi_pending_table(st return ret; } -static unsigned long vgic_mmio_read_its_ctlr(struct kvm *vcpu, - struct vgic_its *its, - gpa_t addr, unsigned int len) -{ - u32 reg = 0; - - mutex_lock(&its->cmd_lock); - if (its->creadr == its->cwriter) - reg |= GITS_CTLR_QUIESCENT; - if (its->enabled) - reg |= GITS_CTLR_ENABLE; - mutex_unlock(&its->cmd_lock); - - return reg; -} - -static void vgic_mmio_write_its_ctlr(struct kvm *kvm, struct vgic_its *its, - gpa_t addr, unsigned int len, - unsigned long val) -{ - its->enabled = !!(val & GITS_CTLR_ENABLE); -} - static unsigned long vgic_mmio_read_its_typer(struct kvm *kvm, struct vgic_its *its, gpa_t addr, unsigned int len) @@ -1162,33 +1139,16 @@ static void vgic_mmio_write_its_cbaser(s #define ITS_CMD_SIZE 32 #define ITS_CMD_OFFSET(reg) ((reg) & GENMASK(19, 5)) -/* - * By writing to CWRITER the guest announces new commands to be processed. - * To avoid any races in the first place, we take the its_cmd lock, which - * protects our ring buffer variables, so that there is only one user - * per ITS handling commands at a given time. - */ -static void vgic_mmio_write_its_cwriter(struct kvm *kvm, struct vgic_its *its, - gpa_t addr, unsigned int len, - unsigned long val) +/* Must be called with the cmd_lock held. */ +static void vgic_its_process_commands(struct kvm *kvm, struct vgic_its *its) { gpa_t cbaser; u64 cmd_buf[4]; - u32 reg; - if (!its) - return; - - mutex_lock(&its->cmd_lock); - - reg = update_64bit_reg(its->cwriter, addr & 7, len, val); - reg = ITS_CMD_OFFSET(reg); - if (reg >= ITS_CMD_BUFFER_SIZE(its->cbaser)) { - mutex_unlock(&its->cmd_lock); + /* Commands are only processed when the ITS is enabled. */ + if (!its->enabled) return; - } - its->cwriter = reg; cbaser = CBASER_ADDRESS(its->cbaser); while (its->cwriter != its->creadr) { @@ -1208,6 +1168,34 @@ static void vgic_mmio_write_its_cwriter( if (its->creadr == ITS_CMD_BUFFER_SIZE(its->cbaser)) its->creadr = 0; } +} + +/* + * By writing to CWRITER the guest announces new commands to be processed. + * To avoid any races in the first place, we take the its_cmd lock, which + * protects our ring buffer variables, so that there is only one user + * per ITS handling commands at a given time. + */ +static void vgic_mmio_write_its_cwriter(struct kvm *kvm, struct vgic_its *its, + gpa_t addr, unsigned int len, + unsigned long val) +{ + u64 reg; + + if (!its) + return; + + mutex_lock(&its->cmd_lock); + + reg = update_64bit_reg(its->cwriter, addr & 7, len, val); + reg = ITS_CMD_OFFSET(reg); + if (reg >= ITS_CMD_BUFFER_SIZE(its->cbaser)) { + mutex_unlock(&its->cmd_lock); + return; + } + its->cwriter = reg; + + vgic_its_process_commands(kvm, its); mutex_unlock(&its->cmd_lock); } @@ -1288,6 +1276,39 @@ static void vgic_mmio_write_its_baser(st *regptr = reg; } +static unsigned long vgic_mmio_read_its_ctlr(struct kvm *vcpu, + struct vgic_its *its, + gpa_t addr, unsigned int len) +{ + u32 reg = 0; + + mutex_lock(&its->cmd_lock); + if (its->creadr == its->cwriter) + reg |= GITS_CTLR_QUIESCENT; + if (its->enabled) + reg |= GITS_CTLR_ENABLE; + mutex_unlock(&its->cmd_lock); + + return reg; +} + +static void vgic_mmio_write_its_ctlr(struct kvm *kvm, struct vgic_its *its, + gpa_t addr, unsigned int len, + unsigned long val) +{ + mutex_lock(&its->cmd_lock); + + its->enabled = !!(val & GITS_CTLR_ENABLE); + + /* + * Try to process any pending commands. This function bails out early + * if the ITS is disabled or no commands have been queued. + */ + vgic_its_process_commands(kvm, its); + + mutex_unlock(&its->cmd_lock); +} + #define REGISTER_ITS_DESC(off, rd, wr, length, acc) \ { \ .reg_offset = off, \ Patches currently in stable-queue which might be from andre.przywara(a)arm.com are queue-4.9/kvm-arm-arm64-vgic-fix-command-handling-while-its-being-disabled.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "kbuild: pkg: use --transform option to prefix paths in tar" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled kbuild: pkg: use --transform option to prefix paths in tar to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: kbuild-pkg-use-transform-option-to-prefix-paths-in-tar.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Masahiro Yamada <yamada.masahiro(a)socionext.com> Date: Wed, 15 Nov 2017 18:17:07 +0900 Subject: kbuild: pkg: use --transform option to prefix paths in tar From: Masahiro Yamada <yamada.masahiro(a)socionext.com> [ Upstream commit 2dbc644ac62bbcb9ee78e84719953f611be0413d ] For rpm-pkg and deb-pkg, a source tar file is created. All paths in the archive must be prefixed with the base name of the tar so that everything is contained in the directory when you extract it. Currently, scripts/package/Makefile uses a symlink for that, and removes it after the tar is created. If you terminate the build during the tar creation, the symlink is left over. Then, at the next package build, you will see a warning like follows: ln: '.' and 'kernel-4.14.0+/.' are the same file It is possible to fix it by adding -n (--no-dereference) option to the "ln" command, but a cleaner way is to use --transform option of "tar" command. This option is GNU extension, but it should not hurt to use it in the Linux build system. The 'S' flag is needed to exclude symlinks from the path fixup. Without it, symlinks in the kernel are broken. Signed-off-by: Masahiro Yamada <yamada.masahiro(a)socionext.com> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- scripts/package/Makefile | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/scripts/package/Makefile +++ b/scripts/package/Makefile @@ -39,10 +39,9 @@ if test "$(objtree)" != "$(srctree)"; th false; \ fi ; \ $(srctree)/scripts/setlocalversion --save-scmversion; \ -ln -sf $(srctree) $(2); \ tar -cz $(RCS_TAR_IGNORE) -f $(2).tar.gz \ - $(addprefix $(2)/,$(TAR_CONTENT) $(3)); \ -rm -f $(2) $(objtree)/.scmversion + --transform 's:^:$(2)/:S' $(TAR_CONTENT) $(3); \ +rm -f $(objtree)/.scmversion # rpm-pkg # --------------------------------------------------------------------------- Patches currently in stable-queue which might be from yamada.masahiro(a)socionext.com are queue-4.9/clk-uniphier-fix-dapll2-clock-rate-of-pro5.patch queue-4.9/kbuild-do-not-call-cc-option-before-kbuild_cflags-initialization.patch queue-4.9/coccinelle-fix-parallel-build-with-check-scripts-coccicheck.patch queue-4.9/kbuild-pkg-use-transform-option-to-prefix-paths-in-tar.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "kbuild: do not call cc-option before KBUILD_CFLAGS initialization" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled kbuild: do not call cc-option before KBUILD_CFLAGS initialization to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: kbuild-do-not-call-cc-option-before-kbuild_cflags-initialization.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Tue Dec 12 13:26:17 CET 2017 From: Masahiro Yamada <yamada.masahiro(a)socionext.com> Date: Thu, 12 Oct 2017 18:22:25 +0900 Subject: kbuild: do not call cc-option before KBUILD_CFLAGS initialization From: Masahiro Yamada <yamada.masahiro(a)socionext.com> [ Upstream commit 433dc2ebe7d17dd21cba7ad5c362d37323592236 ] Some $(call cc-option,...) are invoked very early, even before KBUILD_CFLAGS, etc. are initialized. The returned string from $(call cc-option,...) depends on KBUILD_CPPFLAGS, KBUILD_CFLAGS, and GCC_PLUGINS_CFLAGS. Since they are exported, they are not empty when the top Makefile is recursively invoked. The recursion occurs in several places. For example, the top Makefile invokes itself for silentoldconfig. "make tinyconfig", "make rpm-pkg" are the cases, too. In those cases, the second call of cc-option from the same line runs a different shell command due to non-pristine KBUILD_CFLAGS. To get the same result all the time, KBUILD_* and GCC_PLUGINS_CFLAGS must be initialized before any call of cc-option. This avoids garbage data in the .cache.mk file. Move all calls of cc-option below the config targets because target compiler flags are unnecessary for Kconfig. Signed-off-by: Masahiro Yamada <yamada.masahiro(a)socionext.com> Reviewed-by: Douglas Anderson <dianders(a)chromium.org> Signed-off-by: Sasha Levin <alexander.levin(a)verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- Makefile | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) --- a/Makefile +++ b/Makefile @@ -370,9 +370,6 @@ LDFLAGS_MODULE = CFLAGS_KERNEL = AFLAGS_KERNEL = LDFLAGS_vmlinux = -CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,) -CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) - # Use USERINCLUDE when you must reference the UAPI directories only. USERINCLUDE := \ @@ -393,21 +390,19 @@ LINUXINCLUDE := \ LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE)) -KBUILD_CPPFLAGS := -D__KERNEL__ - +KBUILD_AFLAGS := -D__ASSEMBLY__ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common \ -Werror-implicit-function-declaration \ -Wno-format-security \ - -std=gnu89 $(call cc-option,-fno-PIE) - - + -std=gnu89 +KBUILD_CPPFLAGS := -D__KERNEL__ KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := -KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE) KBUILD_AFLAGS_MODULE := -DMODULE KBUILD_CFLAGS_MODULE := -DMODULE KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds +GCC_PLUGINS_CFLAGS := # Read KERNELRELEASE from include/config/kernel.release (if it exists) KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) @@ -420,7 +415,7 @@ export MAKE AWK GENKSYMS INSTALLKERNEL P export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS -export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN +export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_KASAN CFLAGS_UBSAN export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL @@ -620,6 +615,12 @@ endif # Defaults to vmlinux, but the arch makefile usually adds further targets all: vmlinux +KBUILD_CFLAGS += $(call cc-option,-fno-PIE) +KBUILD_AFLAGS += $(call cc-option,-fno-PIE) +CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,) +CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) +export CFLAGS_GCOV CFLAGS_KCOV + # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default # values of the respective KBUILD_* variables ARCH_CPPFLAGS := Patches currently in stable-queue which might be from yamada.masahiro(a)socionext.com are queue-4.9/clk-uniphier-fix-dapll2-clock-rate-of-pro5.patch queue-4.9/kbuild-do-not-call-cc-option-before-kbuild_cflags-initialization.patch queue-4.9/coccinelle-fix-parallel-build-with-check-scripts-coccicheck.patch queue-4.9/kbuild-pkg-use-transform-option-to-prefix-paths-in-tar.patch

7 years, 2 months

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