UPSTREAM: f2fs: fix deadlock in i_xattr_sem and inode page lock
Thread #1:
[122554.641906][ T92] f2fs_getxattr+0xd4/0x5fc
-> waiting for f2fs_down_read(&F2FS_I(inode)->i_xattr_sem);
[122554.641927][ T92] __f2fs_get_acl+0x50/0x284
[122554.641948][ T92] f2fs_init_acl+0x84/0x54c
[122554.641969][ T92] f2fs_init_inode_metadata+0x460/0x5f0
[122554.641990][ T92] f2fs_add_inline_entry+0x11c/0x350
-> Locked dir->inode_page by f2fs_get_node_page()
[122554.642009][ T92] f2fs_do_add_link+0x100/0x1e4
[122554.642025][ T92] f2fs_create+0xf4/0x22c
[122554.642047][ T92] vfs_create+0x130/0x1f4
Thread #2:
[123996.386358][ T92] __get_node_page+0x8c/0x504
-> waiting for dir->inode_page lock
[123996.386383][ T92] read_all_xattrs+0x11c/0x1f4
[123996.386405][ T92] __f2fs_setxattr+0xcc/0x528
[123996.386424][ T92] f2fs_setxattr+0x158/0x1f4
-> f2fs_down_write(&F2FS_I(inode)->i_xattr_sem);
[123996.386443][ T92] __f2fs_set_acl+0x328/0x430
[123996.386618][ T92] f2fs_set_acl+0x38/0x50
[123996.386642][ T92] posix_acl_chmod+0xc8/0x1c8
[123996.386669][ T92] f2fs_setattr+0x5e0/0x6bc
[123996.386689][ T92] notify_change+0x4d8/0x580
[123996.386717][ T92] chmod_common+0xd8/0x184
[123996.386748][ T92] do_fchmodat+0x60/0x124
[123996.386766][ T92] __arm64_sys_fchmodat+0x28/0x3c
Bug: 307367469
Bug: 305658663
Bug: 280545073
Fixes: 27161f13e3c3 "f2fs: avoid race in between read xattr & write xattr"
Cc: <stable@vger.kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 82d8a4f642421ece594542e1fabc689dcb094b1a)
Change-Id: Iec383216e1887e11c69374d28e4ecdedda133919
(cherry picked from commit d1ad7188cc123a9c83c7ab63fc77046d288e7a2c)
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
2 files changed