ext4: refuse to create ea block when umounted

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The ea block expansion need to access s_root while it is
already set as NULL when umount is triggered. Refuse this
request to avoid panic.

Reported-by: syzbot+2dacb8f015bf1420155f@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=3613786cb88c93aa1c6a279b1df6a7b201347d08
Link: https://lore.kernel.org/r/20230103014517.495275-3-jun.nie@linaro.org
Cc: stable@kernel.org
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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Jun Nie 2023-01-03 09:45:17 +08:00 • committed by Theodore Ts'o

parent 1e9d62d252

commit f31173c199

1 changed files with 7 additions and 0 deletions

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7

fs/ext4/xattr.c

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