======================================================
WARNING: possible circular locking dependency detected
5.15.167-syzkaller #0 Not tainted
------------------------------------------------------
syz.1.74/3958 is trying to acquire lock:
ffff888078ac8ae0 (&sdp->sd_quota_mutex){+.+.}-{3:3}, at: do_qc+0xc8/0x720 fs/gfs2/quota.c:678
but task is already holding lock:
ffff8880609649b8 (&ip->i_rw_mutex){++++}-{3:3}, at: __gfs2_iomap_alloc+0x2b7/0x2090 fs/gfs2/bmap.c:681
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&ip->i_rw_mutex){++++}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
down_read+0x45/0x2e0 kernel/locking/rwsem.c:1498
__gfs2_iomap_get+0x178/0x1480 fs/gfs2/bmap.c:858
gfs2_iomap_get fs/gfs2/bmap.c:1398 [inline]
gfs2_block_map+0x292/0x830 fs/gfs2/bmap.c:1213
bh_get+0x26d/0x6a0 fs/gfs2/quota.c:385
qdsb_get+0x209/0x3b0 fs/gfs2/quota.c:518
gfs2_quota_hold+0x19d/0x5c0 fs/gfs2/quota.c:604
gfs2_quota_lock+0x9f/0x450 fs/gfs2/quota.c:1076
gfs2_quota_lock_check fs/gfs2/quota.h:50 [inline]
gfs2_iomap_begin_write fs/gfs2/bmap.c:1015 [inline]
gfs2_iomap_begin+0x722/0x1350 fs/gfs2/bmap.c:1114
iomap_iter+0x631/0xe30 fs/iomap/iter.c:74
iomap_file_buffered_write+0x248/0x8a0 fs/iomap/buffered-io.c:814
gfs2_file_buffered_write+0x3e3/0x850 fs/gfs2/file.c:1057
gfs2_file_write_iter+0x4a2/0xf10 fs/gfs2/file.c:1165
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_pwrite64 fs/read_write.c:701 [inline]
__do_sys_pwrite64 fs/read_write.c:711 [inline]
__se_sys_pwrite64 fs/read_write.c:708 [inline]
__x64_sys_pwrite64+0x1a9/0x230 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #0 (&sdp->sd_quota_mutex){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
do_qc+0xc8/0x720 fs/gfs2/quota.c:678
gfs2_quota_change+0x2db/0x8c0 fs/gfs2/quota.c:1295
gfs2_alloc_blocks+0x1f0a/0x2970 fs/gfs2/rgrp.c:2504
__gfs2_iomap_alloc+0x4f0/0x2090 fs/gfs2/bmap.c:707
gfs2_iomap_begin_write fs/gfs2/bmap.c:1049 [inline]
gfs2_iomap_begin+0xb12/0x1350 fs/gfs2/bmap.c:1114
iomap_iter+0x631/0xe30 fs/iomap/iter.c:74
iomap_file_buffered_write+0x248/0x8a0 fs/iomap/buffered-io.c:814
gfs2_file_buffered_write+0x3e3/0x850 fs/gfs2/file.c:1057
gfs2_file_write_iter+0x4a2/0xf10 fs/gfs2/file.c:1165
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_pwrite64 fs/read_write.c:701 [inline]
__do_sys_pwrite64 fs/read_write.c:711 [inline]
__se_sys_pwrite64 fs/read_write.c:708 [inline]
__x64_sys_pwrite64+0x1a9/0x230 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ip->i_rw_mutex);
lock(&sdp->sd_quota_mutex);
lock(&ip->i_rw_mutex);
lock(&sdp->sd_quota_mutex);
*** DEADLOCK ***
5 locks held by syz.1.74/3958:
#0: ffff88807de9c460 (sb_writers#22){.+.+}-{0:0}, at: vfs_write+0x29a/0xe50 fs/read_write.c:590
#1: ffff888060964520 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
#1: ffff888060964520 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: gfs2_file_write_iter+0x373/0xf10 fs/gfs2/file.c:1122
#2: ffff88807de9c650 (sb_internal#5){.+.+}-{0:0}, at: gfs2_trans_begin+0x6d/0xe0 fs/gfs2/trans.c:118
#3: ffff888078ac90a8 (&sdp->sd_log_flush_lock){.+.+}-{3:3}, at: __gfs2_trans_begin+0x55a/0x940 fs/gfs2/trans.c:87
#4: ffff8880609649b8 (&ip->i_rw_mutex){++++}-{3:3}, at: __gfs2_iomap_alloc+0x2b7/0x2090 fs/gfs2/bmap.c:681
stack backtrace:
CPU: 1 PID: 3958 Comm: syz.1.74 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
do_qc+0xc8/0x720 fs/gfs2/quota.c:678
gfs2_quota_change+0x2db/0x8c0 fs/gfs2/quota.c:1295
gfs2_alloc_blocks+0x1f0a/0x2970 fs/gfs2/rgrp.c:2504
__gfs2_iomap_alloc+0x4f0/0x2090 fs/gfs2/bmap.c:707
gfs2_iomap_begin_write fs/gfs2/bmap.c:1049 [inline]
gfs2_iomap_begin+0xb12/0x1350 fs/gfs2/bmap.c:1114
iomap_iter+0x631/0xe30 fs/iomap/iter.c:74
iomap_file_buffered_write+0x248/0x8a0 fs/iomap/buffered-io.c:814
gfs2_file_buffered_write+0x3e3/0x850 fs/gfs2/file.c:1057
gfs2_file_write_iter+0x4a2/0xf10 fs/gfs2/file.c:1165
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_pwrite64 fs/read_write.c:701 [inline]
__do_sys_pwrite64 fs/read_write.c:711 [inline]
__se_sys_pwrite64 fs/read_write.c:708 [inline]
__x64_sys_pwrite64+0x1a9/0x230 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f697edc8ef9
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:00007f697d241038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f697ef80f80 RCX: 00007f697edc8ef9
RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000006
RBP: 00007f697ee3bb76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008000c61 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f697ef80f80 R15: 00007ffd41920568
==================================================================
BUG: KASAN: stack-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:784 [inline]
BUG: KASAN: stack-out-of-bounds in gfs2_file_buffered_write+0x505/0x850 fs/gfs2/file.c:1069
Read of size 8 at addr ffffc900020b7d50 by task syz.1.74/3958
CPU: 0 PID: 3958 Comm: syz.1.74 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
should_fault_in_pages fs/gfs2/file.c:784 [inline]
gfs2_file_buffered_write+0x505/0x850 fs/gfs2/file.c:1069
gfs2_file_write_iter+0x4a2/0xf10 fs/gfs2/file.c:1165
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_pwrite64 fs/read_write.c:701 [inline]
__do_sys_pwrite64 fs/read_write.c:711 [inline]
__se_sys_pwrite64 fs/read_write.c:708 [inline]
__x64_sys_pwrite64+0x1a9/0x230 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f697edc8ef9
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:00007f697d241038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f697ef80f80 RCX: 00007f697edc8ef9
RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000006
RBP: 00007f697ee3bb76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008000c61 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f697ef80f80 R15: 00007ffd41920568
addr ffffc900020b7d50 is located in stack of task syz.1.74/3958 at offset 48 in frame:
vfs_write+0x0/0xe50
this frame has 3 objects:
[32, 48) 'iov.i'
[64, 112) 'kiocb.i'
[144, 184) 'iter.i'
Memory state around the buggy address:
ffffc900020b7c00: 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
ffffc900020b7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900020b7d00: 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2 00 00 00 00
^
ffffc900020b7d80: 00 00 f2 f2 f2 f2 00 00 00 00 00 f3 f3 f3 f3 f3
ffffc900020b7e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================