DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: CPU: 0 PID: 13014 at kernel/locking/mutex.c:587 __mutex_lock_common kernel/locking/mutex.c:587 [inline] WARNING: CPU: 0 PID: 13014 at kernel/locking/mutex.c:587 __mutex_lock+0x328/0x9c0 kernel/locking/mutex.c:752 Modules linked in: CPU: 0 PID: 13014 Comm: syz-executor.3 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:587 [inline] RIP: 0010:__mutex_lock+0x328/0x9c0 kernel/locking/mutex.c:752 Code: d0 7c 08 84 d2 0f 85 50 06 00 00 8b 0d 75 73 03 05 85 c9 75 19 90 48 c7 c6 e0 a5 2c 8b 48 c7 c7 40 a4 2c 8b e8 79 6f 71 f6 90 <0f> 0b 90 90 90 e9 0d fe ff ff 4c 8d b5 60 ff ff ff 48 89 df 4c 89 RSP: 0018:ffffc900033be7b0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffe8ffad06a410 RCX: ffffc90028db3000 RDX: 0000000000040000 RSI: ffffffff81511296 RDI: 0000000000000001 RBP: ffffc900033be8d0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 000000002d2d2d2d R12: 1ffff92000677d00 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:00000000f5e59b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031e2e000 CR3: 000000005bc08000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_group_or_file fs/ext4/mballoc.c:5788 [inline] ext4_mb_initialize_context+0x814/0xdf0 fs/ext4/mballoc.c:5832 ext4_mb_new_blocks+0x96d/0x4e40 fs/ext4/mballoc.c:6206 ext4_ext_map_blocks+0x1c24/0x5cd0 fs/ext4/extents.c:4318 ext4_map_blocks+0x61d/0x17d0 fs/ext4/inode.c:623 ext4_getblk+0x17f/0x8a0 fs/ext4/inode.c:833 ext4_bread+0x2c/0x190 fs/ext4/inode.c:889 ext4_quota_write+0x219/0x610 fs/ext4/super.c:7207 write_blk+0x12e/0x220 fs/quota/quota_tree.c:70 get_free_dqblk+0x104/0x2f0 fs/quota/quota_tree.c:136 do_insert_tree+0x4e0/0x19e0 fs/quota/quota_tree.c:347 do_insert_tree+0x67d/0x19e0 fs/quota/quota_tree.c:402 do_insert_tree+0x144a/0x19e0 fs/quota/quota_tree.c:402 do_insert_tree+0x144a/0x19e0 fs/quota/quota_tree.c:402 dq_insert_tree fs/quota/quota_tree.c:432 [inline] qtree_write_dquot+0x248/0x660 fs/quota/quota_tree.c:451 v2_write_dquot+0x1b1/0x2a0 fs/quota/quota_v2.c:372 dquot_acquire+0x3a1/0x6f0 fs/quota/dquot.c:472 ext4_acquire_dquot+0x27f/0x4e0 fs/ext4/super.c:6856 dqget+0x691/0x1160 fs/quota/dquot.c:977 __dquot_initialize+0x588/0xd50 fs/quota/dquot.c:1505 ext4_create+0xa1/0x550 fs/ext4/namei.c:2823 lookup_open.isra.0+0x10a1/0x13c0 fs/namei.c:3505 open_last_lookups fs/namei.c:3574 [inline] path_openat+0x92f/0x29f0 fs/namei.c:3804 do_filp_open+0x1dc/0x430 fs/namei.c:3834 do_sys_openat2+0x17a/0x1e0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_compat_sys_openat fs/open.c:1480 [inline] __se_compat_sys_openat fs/open.c:1478 [inline] __ia32_compat_sys_openat+0x16e/0x210 fs/open.c:1478 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7267579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e595ac EFLAGS: 00000292 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000040 RDX: 00000000000000c1 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi