Linaro-mm-sig October 2022

linaro-mm-sig@lists.linaro.org

29 participants
28 discussions

[PATCH v2 0/1] tee: Add tee_shm_register_fd

by Olivier Masse

Add a new ioctl called TEE_IOC_SHM_REGISTER_FD to register a shared memory from a dmabuf file descriptor. This new ioctl will allow the Linux Kernel to register a buffer to be used by the Secure Data Path OPTEE OS feature. Please find more information here: https://static.linaro.org/connect/san19/presentations/san19-107.pdf Patch tested on Hikey 6220. Etienne Carriere (1): tee: new ioctl to a register tee_shm from a dmabuf file descriptor drivers/tee/tee_core.c | 38 +++++++++++++++ drivers/tee/tee_shm.c | 99 +++++++++++++++++++++++++++++++++++++++- include/linux/tee_drv.h | 11 +++++ include/uapi/linux/tee.h | 29 ++++++++++++ 4 files changed, 175 insertions(+), 2 deletions(-) -- 2.25.0

1 year, 10 months

Try to address the DMA-buf coherency problem

by Christian König

Hi guys, after finding that we essentially have two separate worlds for coherent sharing of buffer through DMA-buf I thought I will tackle that problem a bit and at least allow the framework to reject attachments which won't work. So those patches here add a new dma_coherent flag to each DMA-buf object telling the framework that dev_is_dma_coherent() needs to return true for an importing device to be able to attach. Since we should always have a fallback path this should give userspace the chance to still keep the use case working, either by doing a CPU copy instead or reversing the roles of exporter and importer. For DRM and most V4L2 devices I then fill in the dma_coherent flag based on the return value of dev_is_dma_coherent(). Exporting drivers are allowed to clear the flag for their buffers if special handling like the USWC flag in amdgpu or the uncached allocations for radeon/nouveau are in use. Additional to that importers can also check the flag if they have some non-snooping operations like the special scanout case for amdgpu for example. The patches are only smoke tested and the solution isn't ideal, but as far as I can see should at least keep things working. Please review and/or comment, Christian.

1 year, 11 months

[syzbot] inconsistent lock state in sync_info_debugfs_show

by syzbot

Hello, syzbot found the following issue on: HEAD commit: 1c52283265a4 Merge branch 'akpm' (patches from Andrew) git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1224663fb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=75bc179af0ff0457 dashboard link: https://syzkaller.appspot.com/bug?extid=007bfe0f3330f6e1e7d1 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+007bfe0f3330f6e1e7d1(a)syzkaller.appspotmail.com ================================ WARNING: inconsistent lock state 5.16.0-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.2/18360 [HC0[0]:SC0[0]:HE0:SE1] takes: ffffffff8c712cf8 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] ffffffff8c712cf8 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x2d/0x200 drivers/dma-buf/sync_debug.c:147 {IN-HARDIRQ-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 sync_timeline_debug_remove+0x25/0x190 drivers/dma-buf/sync_debug.c:31 sync_timeline_free drivers/dma-buf/sw_sync.c:104 [inline] kref_put include/linux/kref.h:65 [inline] sync_timeline_put drivers/dma-buf/sw_sync.c:116 [inline] timeline_fence_release+0x263/0x340 drivers/dma-buf/sw_sync.c:144 dma_fence_release+0x2ee/0x590 drivers/dma-buf/dma-fence.c:549 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:276 [inline] dma_fence_array_release+0x1e4/0x2b0 drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x2ee/0x590 drivers/dma-buf/dma-fence.c:549 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:276 [inline] irq_dma_fence_array_work+0xa5/0xd0 drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0x120/0x270 kernel/irq_work.c:211 irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242 irq_work_run+0x54/0xd0 kernel/irq_work.c:251 __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:399 [inline] sw_sync_debugfs_release+0x160/0x240 drivers/dma-buf/sw_sync.c:321 __fput+0x286/0x9f0 fs/file_table.c:311 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xb29/0x2a30 kernel/exit.c:806 do_group_exit+0xd2/0x2f0 kernel/exit.c:935 get_signal+0x4b0/0x28c0 kernel/signal.c:2862 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:288 irq event stamp: 124 hardirqs last enabled at (123): [<ffffffff894fd980>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (123): [<ffffffff894fd980>] _raw_spin_unlock_irqrestore+0x50/0x70 kernel/locking/spinlock.c:194 hardirqs last disabled at (124): [<ffffffff894fd6e1>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (124): [<ffffffff894fd6e1>] _raw_spin_lock_irq+0x41/0x50 kernel/locking/spinlock.c:170 softirqs last enabled at (116): [<ffffffff81465513>] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (116): [<ffffffff81465513>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 softirqs last disabled at (97): [<ffffffff81465513>] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (97): [<ffffffff81465513>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sync_timeline_list_lock); <Interrupt> lock(sync_timeline_list_lock); *** DEADLOCK *** 3 locks held by syz-executor.2/18360: #0: ffff88801e30c0f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:1034 #1: ffff88807a26dd58 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xdf/0x1280 fs/seq_file.c:182 #2: ffffffff8c712cf8 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] #2: ffffffff8c712cf8 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x2d/0x200 drivers/dma-buf/sync_debug.c:147 stack backtrace: CPU: 0 PID: 18360 Comm: syz-executor.2 Not tainted 5.16.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:203 [inline] valid_state kernel/locking/lockdep.c:3945 [inline] mark_lock_irq kernel/locking/lockdep.c:4148 [inline] mark_lock.cold+0x61/0x8e kernel/locking/lockdep.c:4605 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4206 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4224 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x135/0x400 kernel/locking/lockdep.c:4244 trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:399 [inline] sync_print_obj drivers/dma-buf/sync_debug.c:118 [inline] sync_info_debugfs_show+0xeb/0x200 drivers/dma-buf/sync_debug.c:153 seq_read_iter+0x4f5/0x1280 fs/seq_file.c:230 seq_read+0x3e8/0x5c0 fs/seq_file.c:162 vfs_read+0x1b5/0x600 fs/read_write.c:479 ksys_read+0x12d/0x250 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f781fb4b059 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f781e4c0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f781fc5df60 RCX: 00007f781fb4b059 RDX: 0000000000000008 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007f781fba508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0ff6575f R14: 00007f781e4c0300 R15: 0000000000022000 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller(a)googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

2 years, 1 month

[PATCH v7 00/21] Move all drivers to a common dma-buf locking convention

by Dmitry Osipenko

Hello, This series moves all drivers to a dynamic dma-buf locking specification. From now on all dma-buf importers are made responsible for holding dma-buf's reservation lock around all operations performed over dma-bufs in accordance to the locking specification. This allows us to utilize reservation lock more broadly around kernel without fearing of a potential deadlocks. This patchset passes all i915 selftests. It was also tested using VirtIO, Panfrost, Lima, Tegra, udmabuf, AMDGPU and Nouveau drivers. I tested cases of display+GPU, display+V4L and GPU+V4L dma-buf sharing (where appropriate), which covers majority of kernel drivers since rest of the drivers share same or similar code paths. Changelog: v7: - Rebased on top of recent drm-misc-next. - Added ack from Jason Gunthorpe to the RDMA patch. - Added iosys_map_clear() to dma_buf_vmap_unlocked(), making it fully consistent with dma_buf_vmap(). v6: - Added r-b from Michael Ruhl to the i915 patch. - Added acks from Sumit Semwal and updated commit message of the "Move dma_buf_vmap() to dynamic locking specification" patch like was suggested by Sumit. - Added "!dmabuf" check to dma_buf_vmap_unlocked() to match the locked variant of the function, for consistency. v5: - Added acks and r-bs that were given to v4. - Changed i915 preparation patch like was suggested by Michael Ruhl. The scope of reservation locking is smaller now. v4: - Added dma_buf_mmap() to the "locking convention" documentation, which was missed by accident in v3. - Added acks from Christian König, Tomasz Figa and Hans Verkuil that they gave to couple v3 patches. - Dropped the "_unlocked" postfix from function names that don't have the locked variant, as was requested by Christian König. - Factored out the per-driver preparations into separate patches to ease reviewing of the changes, which is now doable without the global dma-buf functions renaming. - Factored out the dynamic locking convention enforcements into separate patches which add the final dma_resv_assert_held(dmabuf->resv) to the dma-buf API functions. v3: - Factored out dma_buf_mmap_unlocked() and attachment functions into aseparate patches, like was suggested by Christian König. - Corrected and factored out dma-buf locking documentation into a separate patch, like was suggested by Christian König. - Intel driver dropped the reservation locking fews days ago from its BO-release code path, but we need that locking for the imported GEMs because in the end that code path unmaps the imported GEM. So I added back the locking needed by the imported GEMs, updating the "dma-buf attachment locking specification" patch appropriately. - Tested Nouveau+Intel dma-buf import/export combo. - Tested udmabuf import to i915/Nouveau/AMDGPU. - Fixed few places in Etnaviv, Panfrost and Lima drivers that I missed to switch to locked dma-buf vmapping in the drm/gem: Take reservation lock for vmap/vunmap operations" patch. In a result invalidated the Christian's r-b that he gave to v2. - Added locked dma-buf vmap/vunmap functions that are needed for fixing vmappping of Etnaviv, Panfrost and Lima drivers mentioned above. I actually had this change stashed for the drm-shmem shrinker patchset, but then realized that it's already needed by the dma-buf patches. Also improved my tests to better cover these code paths. v2: - Changed locking specification to avoid problems with a cross-driver ww locking, like was suggested by Christian König. Now the attach/detach callbacks are invoked without the held lock and exporter should take the lock. - Added "locking convention" documentation that explains which dma-buf functions and callbacks are locked/unlocked for importers and exporters, which was requested by Christian König. - Added ack from Tomasz Figa to the V4L patches that he gave to v1. Dmitry Osipenko (21): dma-buf: Add unlocked variant of vmapping functions dma-buf: Add unlocked variant of attachment-mapping functions drm/gem: Take reservation lock for vmap/vunmap operations drm/prime: Prepare to dynamic dma-buf locking specification drm/armada: Prepare to dynamic dma-buf locking specification drm/i915: Prepare to dynamic dma-buf locking specification drm/omapdrm: Prepare to dynamic dma-buf locking specification drm/tegra: Prepare to dynamic dma-buf locking specification drm/etnaviv: Prepare to dynamic dma-buf locking specification RDMA/umem: Prepare to dynamic dma-buf locking specification misc: fastrpc: Prepare to dynamic dma-buf locking specification xen/gntdev: Prepare to dynamic dma-buf locking specification media: videobuf2: Prepare to dynamic dma-buf locking specification media: tegra-vde: Prepare to dynamic dma-buf locking specification dma-buf: Move dma_buf_vmap() to dynamic locking specification dma-buf: Move dma_buf_attach() to dynamic locking specification dma-buf: Move dma_buf_map_attachment() to dynamic locking specification dma-buf: Move dma_buf_mmap() to dynamic locking specification dma-buf: Document dynamic locking convention media: videobuf2: Stop using internal dma-buf lock dma-buf: Remove obsoleted internal lock Documentation/driver-api/dma-buf.rst | 6 + drivers/dma-buf/dma-buf.c | 216 +++++++++++++++--- drivers/gpu/drm/armada/armada_gem.c | 8 +- drivers/gpu/drm/drm_client.c | 4 +- drivers/gpu/drm/drm_gem.c | 24 ++ drivers/gpu/drm/drm_gem_dma_helper.c | 6 +- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 +- drivers/gpu/drm/drm_gem_ttm_helper.c | 9 +- drivers/gpu/drm/drm_prime.c | 6 +- drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_object.c | 14 ++ .../drm/i915/gem/selftests/i915_gem_dmabuf.c | 16 +- drivers/gpu/drm/lima/lima_sched.c | 4 +- drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 4 +- drivers/gpu/drm/panfrost/panfrost_dump.c | 4 +- drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 6 +- drivers/gpu/drm/qxl/qxl_object.c | 17 +- drivers/gpu/drm/qxl/qxl_prime.c | 4 +- drivers/gpu/drm/tegra/gem.c | 17 +- drivers/infiniband/core/umem_dmabuf.c | 7 +- .../common/videobuf2/videobuf2-dma-contig.c | 22 +- .../media/common/videobuf2/videobuf2-dma-sg.c | 19 +- .../common/videobuf2/videobuf2-vmalloc.c | 17 +- .../platform/nvidia/tegra-vde/dmabuf-cache.c | 6 +- drivers/misc/fastrpc.c | 6 +- drivers/xen/gntdev-dmabuf.c | 8 +- include/drm/drm_gem.h | 3 + include/linux/dma-buf.h | 17 +- 29 files changed, 325 insertions(+), 155 deletions(-) -- 2.37.3

2 years, 1 month

[PATCH v2] dma-buf: fix racing conflict of dma_heap_add()

by Dawei Li

Racing conflict could be: task A task B list_for_each_entry strcmp(h->name)) list_for_each_entry strcmp(h->name) kzalloc kzalloc ...... ..... device_create device_create list_add list_add The root cause is that task B has no idea about the fact someone else(A) has inserted heap with same name when it calls list_add, so a potential collision occurs. v1: https://lore.kernel.org/all/TYCP286MB2323950197F60FC3473123B7CA349@TYCP286M… v1->v2: Narrow down locking scope, check the existence of heap before insertion, as suggested by Andrew Davis. Fixes: c02a81fba74f ("dma-buf: Add dma-buf heaps framework") base-commit: 447fb14bf07905b880c9ed1ea92c53d6dd0649d7 Signed-off-by: Dawei Li <set_pte_at(a)outlook.com> --- drivers/dma-buf/dma-heap.c | 37 ++++++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 9 deletions(-) diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c index 8f5848aa144f..1c787a147e3a 100644 --- a/drivers/dma-buf/dma-heap.c +++ b/drivers/dma-buf/dma-heap.c @@ -216,9 +216,21 @@ const char *dma_heap_get_name(struct dma_heap *heap) return heap->name; } +static inline bool dma_heap_exist(const char *name) +{ + struct dma_heap *h; + + list_for_each_entry(h, &heap_list, list) { + if (!strcmp(h->name, name)) + return true; + } + + return false; +} + struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) { - struct dma_heap *heap, *h, *err_ret; + struct dma_heap *heap, *err_ret; struct device *dev_ret; unsigned int minor; int ret; @@ -235,13 +247,11 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) /* check the name is unique */ mutex_lock(&heap_list_lock); - list_for_each_entry(h, &heap_list, list) { - if (!strcmp(h->name, exp_info->name)) { - mutex_unlock(&heap_list_lock); - pr_err("dma_heap: Already registered heap named %s\n", - exp_info->name); - return ERR_PTR(-EINVAL); - } + if (dma_heap_exist(exp_info->name)) { + mutex_unlock(&heap_list_lock); + pr_err("dma_heap: Already registered heap named %s\n", + exp_info->name); + return ERR_PTR(-EINVAL); } mutex_unlock(&heap_list_lock); @@ -283,13 +293,22 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) err_ret = ERR_CAST(dev_ret); goto err2; } + /* Add heap to the list */ mutex_lock(&heap_list_lock); + if (unlikely(dma_heap_exist(exp_info->name))) { + mutex_unlock(&heap_list_lock); + pr_err("dma_heap: Already registered heap named %s\n", + exp_info->name); + err_ret = ERR_PTR(-EINVAL); + goto err3; + } list_add(&heap->list, &heap_list); mutex_unlock(&heap_list_lock); return heap; - +err3: + device_destroy(dma_heap_class, heap->heap_devt); err2: cdev_del(&heap->heap_cdev); err1: -- 2.25.1

2 years, 1 month

[PATCH] drm/radeon: Replace kmap() with kmap_local_page()

by Fabio M. De Francesco

The use of kmap() is being deprecated in favor of kmap_local_page(). There are two main problems with kmap(): (1) It comes with an overhead as the mapping space is restricted and protected by a global lock for synchronization and (2) it also requires global TLB invalidation when the kmap’s pool wraps and it might block when the mapping space is fully utilized until a slot becomes available. With kmap_local_page() the mappings are per thread, CPU local, can take page faults, and can be called from any context (including interrupts). It is faster than kmap() in kernels with HIGHMEM enabled. Furthermore, the tasks can be preempted and, when they are scheduled to run again, the kernel virtual addresses are restored and still valid. Therefore, replace kmap() with kmap_local_page() in radeon_ttm_gtt_read(). Cc: "Venkataramanan, Anirudh" <anirudh.venkataramanan(a)intel.com> Suggested-by: Ira Weiny <ira.weiny(a)intel.com> Signed-off-by: Fabio M. De Francesco <fmdefrancesco(a)gmail.com> --- drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index d33fec488713..bdb4c0e0736b 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -869,11 +869,11 @@ static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf, page = rdev->gart.pages[p]; if (page) { - ptr = kmap(page); + ptr = kmap_local_page(page); ptr += off; r = copy_to_user(buf, ptr, cur_size); - kunmap(rdev->gart.pages[p]); + kunmap_local(ptr); } else r = clear_user(buf, cur_size); -- 2.37.3

2 years, 1 month

[PATCH] dma-buf: fix racing conflict of dma_heap_add()

by Dawei Li

2 years, 1 month

[PATCH v2] dma-buf: cma_heap: Fix typo in comment

by Mark-PK Tsai

Remove duplicated "by" from comment in cma_heap_allocate(). Signed-off-by: Mark-PK Tsai <mark-pk.tsai(a)mediatek.com> --- drivers/dma-buf/heaps/cma_heap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c index 28fb04eccdd0..cd386ce639f3 100644 --- a/drivers/dma-buf/heaps/cma_heap.c +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -316,7 +316,7 @@ static struct dma_buf *cma_heap_allocate(struct dma_heap *heap, kunmap_atomic(vaddr); /* * Avoid wasting time zeroing memory if the process - * has been killed by by SIGKILL + * has been killed by SIGKILL */ if (fatal_signal_pending(current)) goto free_cma; -- 2.18.0

2 years, 1 month

[PATCH v3] dma-buf: cma_heap: Remove duplicated 'by' in comment

by Mark-PK Tsai

Remove duplicated 'by' from comment in cma_heap_allocate(). Signed-off-by: Mark-PK Tsai <mark-pk.tsai(a)mediatek.com> --- drivers/dma-buf/heaps/cma_heap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c index 28fb04eccdd0..cd386ce639f3 100644 --- a/drivers/dma-buf/heaps/cma_heap.c +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -316,7 +316,7 @@ static struct dma_buf *cma_heap_allocate(struct dma_heap *heap, kunmap_atomic(vaddr); /* * Avoid wasting time zeroing memory if the process - * has been killed by by SIGKILL + * has been killed by SIGKILL */ if (fatal_signal_pending(current)) goto free_cma; -- 2.18.0

2 years, 1 month

etnaviv OOPS, NULL pointer dereference on Linux 6.0.2

by Francesco Dolcini

Hello all, I got the following Oops, on a Apalis iMX6 Dual with 512MB RAM, running glmark2 tests with the system under memory pressure (OOM Killer!). It's not something systematic and I cannot tell if this is a regression or not, any suggestion? The system just froze afterward. [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 6.0.2-6.1.0-devel+git.dab08f7eecdf (oe-user@oe-host) (arm-tdx-linux-gnueabi-gcc (GCC) 11.3.0, GNU ld (GNU Binutils) 2.38.20220708) #1 SMP Sat Oct 15 06:02:59 UTC 2022 [ 0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] OF: fdt: Machine model: Toradex Apalis iMX6Q/D Module on Ixora Carrier Board V1.1 ... [ 1.749471] etnaviv etnaviv: bound 130000.gpu (ops gpu_ops) [ 1.750527] etnaviv etnaviv: bound 134000.gpu (ops gpu_ops) [ 1.751522] etnaviv etnaviv: bound 2204000.gpu (ops gpu_ops) [ 1.751566] etnaviv-gpu 130000.gpu: model: GC2000, revision: 5108 [ 1.753141] etnaviv-gpu 134000.gpu: model: GC320, revision: 5007 [ 1.753392] etnaviv-gpu 2204000.gpu: model: GC355, revision: 1215 [ 1.753421] etnaviv-gpu 2204000.gpu: Ignoring GPU with VG and FE2.0 [ 1.756559] [drm] Initialized etnaviv 1.3.0 20151214 for etnaviv on minor 0 ... [ 480.994256] Out of memory: Killed process 1740 (Qt5_CinematicEx) total-vm:242656kB, anon-rss:105212kB, file-rss:9864kB, shmem-rss:1304kB, UID:0 pgtables:192kB oom_score_adj:0 [ 481.068691] 8<--- cut here --- [ 481.072037] Unable to handle kernel NULL pointer dereference at virtual address 00000004 [ 481.080366] [00000004] *pgd=00000000 [ 481.083994] Internal error: Oops: 805 [#1] SMP ARM [ 481.088813] Modules linked in: 8021q imx_sdma virt_dma coda_vpu v4l2_jpeg imx_vdoa dw_hdmi_ahb_audio fuse [ 481.098458] CPU: 1 PID: 1755 Comm: QSGRenderThread Not tainted 6.0.2-6.1.0-devel+git.dab08f7eecdf #1 [ 481.107619] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 481.114157] PC is at etnaviv_gem_free_object+0x40/0x128 [ 481.119412] LR is at lock_is_held_type+0xa4/0x15c [ 481.124138] pc : [<c0787f90>] lr : [<c0e46250>] psr: 60030113 [ 481.130421] sp : e1155da8 ip : 00000000 fp : 0000000c [ 481.135670] r10: c34ef400 r9 : c262066c r8 : 00000122 [ 481.140916] r7 : c2153000 r6 : c2153000 r5 : 00000870 r4 : c25f24a0 [ 481.147460] r3 : 00000000 r2 : 00000000 r1 : 00000100 r0 : 00000000 [ 481.153997] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 481.161143] Control: 10c5387d Table: 2caf004a DAC: 00000051 [ 481.166896] Register r0 information: NULL pointer [ 481.171615] Register r1 information: non-paged memory [ 481.176694] Register r2 information: NULL pointer [ 481.181429] Register r3 information: NULL pointer [ 481.181441] Register r4 information: slab kmalloc-128 start c25f2480 pointer offset 32 size 128 [ 481.186173] Register r5 information: non-paged memory [ 481.186181] Register r6 information: slab kmalloc-512 start c2153000 pointer offset 0 size 512 [ 481.199953] Register r7 information: slab kmalloc-512 start c2153000 pointer offset 0 size 512 [ 481.199975] Register r8 information: non-paged memory [ 481.199983] Register r9 information: slab kmalloc-2k start c2620000 pointer offset 1644 size 2048 [ 481.222276] Register r10 information: slab kmalloc-1k start c34ef400 pointer offset 0 size 1024 [ 481.222297] Register r11 information: non-paged memory [ 481.245038] Register r12 information: NULL pointer [ 481.245056] Process QSGRenderThread (pid: 1755, stack limit = 0xd30acffa) [ 481.245070] Stack: (0xe1155da8 to 0xe1156000) [ 481.245084] 5da0: c0787f50 fffffff4 00000870 c8102400 c212f000 c2620000 [ 481.245094] 5dc0: c262066c c34ef400 0000000c c078693c 00000003 00000000 00000000 c07e2960 [ 481.245103] 5de0: c2153000 042beef1 c2153a00 c2620000 c8102400 c8102940 c34ef5e4 c07324ec [ 481.245112] 5e00: c262066c c34ef400 0000000c c2153a00 c2620000 c34ef400 e1155e6c c0732a5c [ 481.245121] 5e20: c00c642e 0000000c c212f000 0000000c c0f6d968 e1155e6c c34ef400 c0723448 [ 481.245130] 5e40: 0000e280 00000001 c12b5820 c212f000 aed13e60 e1155e6c 0000002e c2f39000 [ 481.245138] 5e60: c0732e44 00000051 00000000 00000000 00000000 0000000c c212f000 c212f7a0 [ 481.318348] 5e80: 00000000 c018b61c c212f000 c16e0d20 c03514d8 c156155c 60070013 c0193790 [ 481.318369] 5ea0: b28a3000 00000254 c6d00280 00000001 00000000 042beef1 00000009 00004000 [ 481.318378] 5ec0: c212f000 c3caf280 00000001 c2f39000 00000028 c03514f0 00000000 00000000 [ 481.342916] 5ee0: c03513f0 c212f7a0 00000000 042beef1 aed13e60 c00c642e c2f39001 c0100080 [ 481.342928] 5f00: aed13e60 c212f000 c2f39000 c25b8710 00000009 c0342234 00000000 042beef1 [ 481.342938] 5f20: c36866e0 80000007 c212f000 b28a311c c3686680 c36866e0 e1155fb0 80000007 [ 481.342948] 5f40: c212f000 c0e516b0 aefd7cd0 c01d34b0 000001e0 00000000 00000000 00000000 [ 481.342958] 5f60: 00000193 00000007 c160fd90 b28a311c e1155fb0 c0e51500 0000021c 042beef1 [ 481.342969] 5f80: adf87818 aed13e90 aed13e60 c00c642e 00000036 c01002b4 c212f000 00000036 [ 481.342978] 5fa0: adf87818 c0100080 aed13e90 aed13e60 00000009 c00c642e aed13e60 aed13e40 [ 481.342988] 5fc0: aed13e90 aed13e60 c00c642e 00000036 00000001 0000021c 00870000 adf87818 [ 481.408411] 5fe0: 00000036 aed13e28 b6088089 b6001ae6 60070030 00000009 00000000 00000000 [ 481.408431] etnaviv_gem_free_object from etnaviv_gem_prime_import_sg_table+0x12c/0x160 [ 481.408469] etnaviv_gem_prime_import_sg_table from drm_gem_prime_import_dev+0x98/0x150 [ 481.408509] drm_gem_prime_import_dev from drm_gem_prime_fd_to_handle+0x188/0x1f8 [ 481.408528] drm_gem_prime_fd_to_handle from drm_ioctl+0x1e8/0x3a0 [ 481.408545] drm_ioctl from sys_ioctl+0x530/0xdbc [ 481.408571] sys_ioctl from ret_fast_syscall+0x0/0x1c [ 481.408587] Exception stack(0xe1155fa8 to 0xe1155ff0) [ 481.408599] 5fa0: aed13e90 aed13e60 00000009 c00c642e aed13e60 aed13e40 [ 481.408608] 5fc0: aed13e90 aed13e60 c00c642e 00000036 00000001 0000021c 00870000 adf87818 [ 481.477625] 5fe0: 00000036 aed13e28 b6088089 b6001ae6 [ 481.477641] Code: e5962174 e59f80e0 e3a01c01 e1a07006 (e5823004) [ 481.477819] ---[ end trace 0000000000000000 ]--- Francesco

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Linaro-mm-sig October 2022