erofs: correct FSDAX detection

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[ Upstream commit ebe4f3f6eb ]

The detection of the primary device is skipped incorrectly
if the multiple or flattened feature is enabled.

It also fixes the FSDAX misdetection for non-block extra blobs.

Fixes: c6993c4cb9 ("erofs: Fallback to normal access if DAX is not supported on extra device")
Reported-and-tested-by: syzbot+31b8fb02cb8a25bd5e78@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/r/691af9f6.a70a0220.3124cb.0097.GAE@google.com
Cc: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Gao Xiang 2025-11-17 19:57:29 +08:00 • committed by Greg Kroah-Hartman

parent 1fa7e6e78b

commit 46198ad004

1 changed files with 11 additions and 11 deletions

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fs/erofs/super.c

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