Linaro-mm-sig April 2026

linaro-mm-sig@lists.linaro.org

91 participants
216 discussions

[PATCH] dma-buf: set SB_I_NOEXEC and SB_I_NODEV on dmabuf filesystem

by Chia-Lin Kao (AceLan)

The VFS now warns if an inode flagged with S_ANON_INODE is located on a filesystem that does not have SB_I_NOEXEC set. dmabuf inodes are created using alloc_anon_inode(), which sets S_ANON_INODE. This triggers a warning in path_noexec() when a dmabuf is mmapped, for example by GStreamer's v4l2src element. [ 60.061328] WARNING: CPU: 2 PID: 2803 at fs/exec.c:125 path_noexec+0xa0/0xd0 ... [ 60.061637] do_mmap+0x2b5/0x680 The warning was introduced by commit 1e7ab6f67824 ("anon_inode: rework assertions") which added enforcement that anonymous inodes must be on filesystems with SB_I_NOEXEC set. Fix this by setting SB_I_NOEXEC and SB_I_NODEV on the dmabuf filesystem context, following the same pattern as commit ce7419b6cf23d ("anon_inode: raise SB_I_NODEV and SB_I_NOEXEC") and commit 98f99394a104c ("secretmem: use SB_I_NOEXEC"). Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao(a)canonical.com> --- drivers/dma-buf/dma-buf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index a4d8f2ff94e46..dea79aaab10ce 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -221,6 +221,8 @@ static int dma_buf_fs_init_context(struct fs_context *fc) if (!ctx) return -ENOMEM; ctx->dops = &dma_buf_dentry_ops; + fc->s_iflags |= SB_I_NOEXEC; + fc->s_iflags |= SB_I_NODEV; return 0; } -- 2.51.0

1 month, 4 weeks

[PATCH] dma-fence: Move signalling tracepoint to before ops detach

by Tvrtko Ursulin

Move the signalling tracepoint to before fence->ops are reset otherwise tracepoint will dereference a null pointer. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin(a)igalia.com> Fixes: 541c8f2468b9 ("dma-buf: detach fence ops on signal v3") Cc: Christian König <christian.koenig(a)amd.com> Cc: Philipp Stanner <phasta(a)kernel.org> Cc: Boris Brezillon <boris.brezillon(a)collabora.com> Cc: linux-media(a)vger.kernel.org Cc: linaro-mm-sig(a)lists.linaro.org --- drivers/dma-buf/dma-fence.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index 1826ba73094c..1c1eaecaf1b0 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -363,6 +363,8 @@ void dma_fence_signal_timestamp_locked(struct dma_fence *fence, &fence->flags))) return; + trace_dma_fence_signaled(fence); + /* * When neither a release nor a wait operation is specified set the ops * pointer to NULL to allow the fence structure to become independent @@ -377,7 +379,6 @@ void dma_fence_signal_timestamp_locked(struct dma_fence *fence, fence->timestamp = timestamp; set_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags); - trace_dma_fence_signaled(fence); list_for_each_entry_safe(cur, tmp, &cb_list, node) { INIT_LIST_HEAD(&cur->node); -- 2.52.0

1 month, 4 weeks

(no subject)

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2 months

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2 months

Enigles

by Alex Morgan

2 months

HOW TO CREATE FLASH USDT FOR ONLINE TRADING, GAMING AND ONLINE PURCHASES

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2 months

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2 months

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2 months

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Linaro-mm-sig April 2026