general protection fault, probably for non-canonical address 0xdffffc000000003d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000001e8-0x00000000000001ef] CPU: 1 PID: 107 Comm: jfsCommit Not tainted 6.4.0-rc2-syzkaller-00163-g2d1bcbc6cd70 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:__lock_acquire+0x69/0x2000 kernel/locking/lockdep.c:4942 Code: df 0f b6 04 30 84 c0 0f 85 5a 16 00 00 83 3d d1 df ea 0c 00 0f 84 02 11 00 00 83 3d 70 33 74 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 f7 e8 e9 35 78 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc90002d2fad8 EFLAGS: 00010002 RAX: 000000000000003d RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00000000000001e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 00000000000001e8 R15: ffff888013f15940 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f222629a000 CR3: 000000002dac3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:375 [inline] txLazyCommit fs/jfs/jfs_txnmgr.c:2663 [inline] jfs_lazycommit+0x4f5/0xb70 fs/jfs/jfs_txnmgr.c:2727 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x69/0x2000 kernel/locking/lockdep.c:4942 Code: df 0f b6 04 30 84 c0 0f 85 5a 16 00 00 83 3d d1 df ea 0c 00 0f 84 02 11 00 00 83 3d 70 33 74 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 f7 e8 e9 35 78 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc90002d2fad8 EFLAGS: 00010002 RAX: 000000000000003d RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00000000000001e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 00000000000001e8 R15: ffff888013f15940 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f222629a000 CR3: 000000002dac3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: df 0f fisttps (%rdi) 2: b6 04 mov $0x4,%dh 4: 30 84 c0 0f 85 5a 16 xor %al,0x165a850f(%rax,%rax,8) b: 00 00 add %al,(%rax) d: 83 3d d1 df ea 0c 00 cmpl $0x0,0xceadfd1(%rip) # 0xceadfe5 14: 0f 84 02 11 00 00 je 0x111c 1a: 83 3d 70 33 74 0b 00 cmpl $0x0,0xb743370(%rip) # 0xb743391 21: 74 2b je 0x4e 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 f7 mov %r14,%rdi 33: e8 e9 35 78 00 callq 0x783621 38: 48 rex.W 39: be 00 00 00 00 mov $0x0,%esi 3e: 00 fc add %bh,%ah