======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.195/5328 is trying to acquire lock:
ffff8880605b5488 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x1b6/0x7f0 fs/ocfs2/sysfile.c:101
but task is already holding lock:
ffff88805ff34da0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x76f/0xe90 fs/ocfs2/file.c:2018
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}:
down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
ocfs2_read_virt_blocks+0x237/0x8d0 fs/ocfs2/extent_map.c:984
ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline]
ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline]
ocfs2_find_entry+0x3ca/0x2060 fs/ocfs2/dir.c:1091
ocfs2_find_files_on_disk+0xdb/0x2f0 fs/ocfs2/dir.c:1995
ocfs2_lookup_ino_from_name+0x4f/0xf0 fs/ocfs2/dir.c:2017
_ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline]
ocfs2_get_system_file_inode+0x32b/0x7f0 fs/ocfs2/sysfile.c:112
ocfs2_init_global_system_inodes+0x2f3/0x6d0 fs/ocfs2/super.c:458
ocfs2_initialize_super fs/ocfs2/super.c:2279 [inline]
ocfs2_fill_super+0x4060/0x50f0 fs/ocfs2/super.c:995
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3034
do_mount fs/namespace.c:3377 [inline]
__do_sys_mount fs/namespace.c:3585 [inline]
__se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #0 (&osb->system_file_mutex){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1e3/0x2400 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
ocfs2_get_system_file_inode+0x1b6/0x7f0 fs/ocfs2/sysfile.c:101
ocfs2_reserve_local_alloc_bits+0xfb/0x25f0 fs/ocfs2/localalloc.c:626
ocfs2_reserve_clusters_with_limit+0x1b6/0xc10 fs/ocfs2/suballoc.c:1162
ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline]
ocfs2_lock_allocators+0x2d5/0x5f0 fs/ocfs2/suballoc.c:2679
ocfs2_extend_allocation+0x400/0x1830 fs/ocfs2/file.c:588
ocfs2_allocate_unwritten_extents+0x303/0x840 fs/ocfs2/file.c:1499
__ocfs2_change_file_space+0x831/0xe90 fs/ocfs2/file.c:2026
ocfs2_fallocate+0x1ee/0x240 fs/ocfs2/file.c:2141
vfs_fallocate+0x587/0x6f0 fs/open.c:308
ioctl_preallocate fs/ioctl.c:294 [inline]
file_ioctl fs/ioctl.c:334 [inline]
do_vfs_ioctl+0x1b52/0x1ef0 fs/ioctl.c:853
__do_sys_ioctl fs/ioctl.c:872 [inline]
__se_sys_ioctl+0x83/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 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(&ocfs2_file_ip_alloc_sem_key);
lock(&osb->system_file_mutex);
lock(&ocfs2_file_ip_alloc_sem_key);
lock(&osb->system_file_mutex);
*** DEADLOCK ***
3 locks held by syz.5.195/5328:
#0: ffff888075df6460 (sb_writers#31){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff888075df6460 (sb_writers#31){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88805ff35108 (&sb->s_type->i_mutex_key#37){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88805ff35108 (&sb->s_type->i_mutex_key#37){+.+.}-{3:3}, at: __ocfs2_change_file_space+0x1d1/0xe90 fs/ocfs2/file.c:1952
#2: ffff88805ff34da0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x76f/0xe90 fs/ocfs2/file.c:2018
stack backtrace:
CPU: 1 PID: 5328 Comm: syz.5.195 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
check_noncircular+0x296/0x330 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 kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1e3/0x2400 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
ocfs2_get_system_file_inode+0x1b6/0x7f0 fs/ocfs2/sysfile.c:101
ocfs2_reserve_local_alloc_bits+0xfb/0x25f0 fs/ocfs2/localalloc.c:626
ocfs2_reserve_clusters_with_limit+0x1b6/0xc10 fs/ocfs2/suballoc.c:1162
ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline]
ocfs2_lock_allocators+0x2d5/0x5f0 fs/ocfs2/suballoc.c:2679
ocfs2_extend_allocation+0x400/0x1830 fs/ocfs2/file.c:588
ocfs2_allocate_unwritten_extents+0x303/0x840 fs/ocfs2/file.c:1499
__ocfs2_change_file_space+0x831/0xe90 fs/ocfs2/file.c:2026
ocfs2_fallocate+0x1ee/0x240 fs/ocfs2/file.c:2141
vfs_fallocate+0x587/0x6f0 fs/open.c:308
ioctl_preallocate fs/ioctl.c:294 [inline]
file_ioctl fs/ioctl.c:334 [inline]
do_vfs_ioctl+0x1b52/0x1ef0 fs/ioctl.c:853
__do_sys_ioctl fs/ioctl.c:872 [inline]
__se_sys_ioctl+0x83/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd527f72dd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd5261cc028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd5281ebfa0 RCX: 00007fd527f72dd9
RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000005
RBP: 00007fd528008d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd5281ec038 R14: 00007fd5281ebfa0 R15: 00007ffc4216db78
netlink: 224 bytes leftover after parsing attributes in process `syz.5.195'.
tipc: Enabling of bearer rejected, failed to enable media