diff options
| author | Tetsuo Handa <[email protected]> | 2023-01-02 23:05:33 +0900 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2023-01-02 10:31:09 -0800 |
| commit | 0226635c304cfd5c9db9b78c259cb713819b057e (patch) | |
| tree | d953d1f6de947ca0a6e29ddedfbbcaa16afa2bfd /scripts/gdb/linux/rbtree.py | |
| parent | 88603b6dc419445847923fcb7fe5080067a30f98 (diff) | |
fs/ntfs3: don't hold ni_lock when calling truncate_setsize()
syzbot is reporting hung task at do_user_addr_fault() [1], for there is
a silent deadlock between PG_locked bit and ni_lock lock.
Since filemap_update_page() calls filemap_read_folio() after calling
folio_trylock() which will set PG_locked bit, ntfs_truncate() must not
call truncate_setsize() which will wait for PG_locked bit to be cleared
when holding ni_lock lock.
Link: https://lore.kernel.org/all/[email protected]/
Link: https://syzkaller.appspot.com/bug?extid=bed15dbf10294aa4f2ae [1]
Reported-by: syzbot <[email protected]>
Debugged-by: Linus Torvalds <[email protected]>
Co-developed-by: Hillf Danton <[email protected]>
Signed-off-by: Hillf Danton <[email protected]>
Signed-off-by: Tetsuo Handa <[email protected]>
Fixes: 4342306f0f0d ("fs/ntfs3: Add file operations and implementation")
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'scripts/gdb/linux/rbtree.py')
0 files changed, 0 insertions, 0 deletions