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| author | Theodore Ts'o <[email protected]> | 2023-05-07 01:04:01 +0000 |
|---|---|---|
| committer | Theodore Ts'o <[email protected]> | 2023-05-13 22:05:05 +0000 |
| commit | f4ce24f54d9cca4f09a395f3eecce20d6bec4663 (patch) | |
| tree | 236dd40a035004bf3a07896147cd1ae102ad3a5a /lib/string_helpers.c | |
| parent | ext4: improve error recovery code paths in __ext4_remount() (diff) | |
| download | kernel-f4ce24f54d9cca4f09a395f3eecce20d6bec4663.tar.gz kernel-f4ce24f54d9cca4f09a395f3eecce20d6bec4663.zip | |
ext4: fix deadlock when converting an inline directory in nojournal mode
In no journal mode, ext4_finish_convert_inline_dir() can self-deadlock
by calling ext4_handle_dirty_dirblock() when it already has taken the
directory lock. There is a similar self-deadlock in
ext4_incvert_inline_data_nolock() for data files which we'll fix at
the same time.
A simple reproducer demonstrating the problem:
mke2fs -Fq -t ext2 -O inline_data -b 4k /dev/vdc 64
mount -t ext4 -o dirsync /dev/vdc /vdc
cd /vdc
mkdir file0
cd file0
touch file0
touch file1
attr -s BurnSpaceInEA -V abcde .
touch supercalifragilisticexpialidocious
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Reported-by: [email protected]
Link: https://syzkaller.appspot.com/bug?id=ba84cc80a9491d65416bc7877e1650c87530fe8a
Signed-off-by: Theodore Ts'o <[email protected]>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions