EXT4-fs (loop4): 1 truncate cleaned up
EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
======================================================
WARNING: possible circular locking dependency detected
6.12.0-next-20241126-syzkaller #0 Not tainted
------------------------------------------------------
syz.4.1239/10047 is trying to acquire lock:
ffff88805b7e8de0 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
ffff88805b7e8de0 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}, at: ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline]
ffff88805b7e8de0 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}, at: ext4_xattr_inode_lookup_create+0x1af1/0x2030 fs/ext4/xattr.c:1596
but task is already holding lock:
ffff88807ae3aa28 (&ei->i_data_sem/3){++++}-{4:4}, at: ext4_setattr+0x16e1/0x1da0 fs/ext4/inode.c:5504
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&ei->i_data_sem/3){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
down_write+0x99/0x220 kernel/locking/rwsem.c:1577
ext4_update_i_disksize fs/ext4/ext4.h:3394 [inline]
ext4_xattr_inode_write fs/ext4/xattr.c:1452 [inline]
ext4_xattr_inode_lookup_create+0x1798/0x2030 fs/ext4/xattr.c:1602
ext4_xattr_ibody_set+0x214/0x730 fs/ext4/xattr.c:2269
ext4_xattr_set_handle+0xba6/0x1580 fs/ext4/xattr.c:2446
ext4_xattr_set+0x280/0x3e0 fs/ext4/xattr.c:2560
__vfs_setxattr+0x468/0x4a0 fs/xattr.c:200
__vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234
vfs_setxattr+0x221/0x430 fs/xattr.c:321
do_setxattr fs/xattr.c:636 [inline]
filename_setxattr+0x2af/0x430 fs/xattr.c:665
path_setxattrat+0x440/0x510 fs/xattr.c:713
__do_sys_lsetxattr fs/xattr.c:754 [inline]
__se_sys_lsetxattr fs/xattr.c:750 [inline]
__x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
down_write+0x99/0x220 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:818 [inline]
ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline]
ext4_xattr_inode_lookup_create+0x1af1/0x2030 fs/ext4/xattr.c:1596
ext4_xattr_block_set+0x274/0x3980 fs/ext4/xattr.c:1916
ext4_xattr_move_to_block fs/ext4/xattr.c:2670 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2745 [inline]
ext4_expand_extra_isize_ea+0x12d7/0x1cf0 fs/ext4/xattr.c:2837
__ext4_expand_extra_isize+0x2fb/0x3e0 fs/ext4/inode.c:5888
ext4_try_to_expand_extra_isize fs/ext4/inode.c:5931 [inline]
__ext4_mark_inode_dirty+0x524/0x880 fs/ext4/inode.c:6009
ext4_setattr+0x1780/0x1da0 fs/ext4/inode.c:5507
notify_change+0xbca/0xe90 fs/attr.c:552
do_truncate+0x220/0x310 fs/open.c:65
vfs_truncate+0x2e1/0x3b0 fs/open.c:111
do_sys_truncate+0xdb/0x190 fs/open.c:134
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ei->i_data_sem/3);
lock(&sb->s_type->i_mutex_key#8/1);
lock(&ei->i_data_sem/3);
lock(&sb->s_type->i_mutex_key#8/1);
*** DEADLOCK ***
5 locks held by syz.4.1239/10047:
#0: ffff88802cedc420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88807ae3ab98 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#1: ffff88807ae3ab98 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: do_truncate+0x20c/0x310 fs/open.c:63
#2: ffff88807ae3ad38 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:863 [inline]
#2: ffff88807ae3ad38 (mapping.invalidate_lock){++++}-{4:4}, at: ext4_setattr+0xf94/0x1da0 fs/ext4/inode.c:5452
#3: ffff88807ae3aa28 (&ei->i_data_sem/3){++++}-{4:4}, at: ext4_setattr+0x16e1/0x1da0 fs/ext4/inode.c:5504
#4: ffff88807ae3a868 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:161 [inline]
#4: ffff88807ae3a868 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5928 [inline]
#4: ffff88807ae3a868 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x491/0x880 fs/ext4/inode.c:6009
stack backtrace:
CPU: 1 UID: 0 PID: 10047 Comm: syz.4.1239 Not tainted 6.12.0-next-20241126-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
down_write+0x99/0x220 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:818 [inline]
ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline]
ext4_xattr_inode_lookup_create+0x1af1/0x2030 fs/ext4/xattr.c:1596
ext4_xattr_block_set+0x274/0x3980 fs/ext4/xattr.c:1916
ext4_xattr_move_to_block fs/ext4/xattr.c:2670 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2745 [inline]
ext4_expand_extra_isize_ea+0x12d7/0x1cf0 fs/ext4/xattr.c:2837
__ext4_expand_extra_isize+0x2fb/0x3e0 fs/ext4/inode.c:5888
ext4_try_to_expand_extra_isize fs/ext4/inode.c:5931 [inline]
__ext4_mark_inode_dirty+0x524/0x880 fs/ext4/inode.c:6009
ext4_setattr+0x1780/0x1da0 fs/ext4/inode.c:5507
notify_change+0xbca/0xe90 fs/attr.c:552
do_truncate+0x220/0x310 fs/open.c:65
vfs_truncate+0x2e1/0x3b0 fs/open.c:111
do_sys_truncate+0xdb/0x190 fs/open.c:134
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb82237e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb8231b7038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007fb822535fa0 RCX: 00007fb82237e819
RDX: 0000000000000000 RSI: 000000000000003b RDI: 0000000020000180
RBP: 00007fb8223f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb822535fa0 R15: 00007ffd346c21a8
</TASK>
EXT4-fs error (device loop4): mb_free_blocks:1948: group 0, inode 15: block 33:freeing already freed block (bit 32); block bitmap corrupt.