general protection fault, probably for non-canonical address 0xdffffc00000000ba: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000005d0-0x00000000000005d7] CPU: 0 PID: 3500 Comm: syz-executor366 Not tainted 5.15.153-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:bio_associate_blkg_from_css+0x113/0x960 block/blk-cgroup.c:1867 Code: ef 03 41 80 3c 2f 00 74 08 4c 89 f7 e8 46 d9 d4 fd bd d0 05 00 00 49 03 2e 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 1f d9 d4 fd bb 90 00 00 00 48 03 5d RSP: 0018:ffffc900020878d8 EFLAGS: 00010202 RAX: 00000000000000ba RBX: ffffffff915726f0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff915725e0 RDI: ffff88801dc92640 RBP: 00000000000005d0 R08: ffffffff83f529a4 R09: fffffbfff1f7a019 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff915725e0 R13: ffff88801dc92640 R14: ffff88801dc92648 R15: 1ffff11003b924c9 FS: 00005555573f1380(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555573fa6f8 CR3: 0000000013fcd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bio_associate_blkg+0x220/0x330 block/blk-cgroup.c:1893 lbmStartIO+0x207/0x4b0 fs/jfs/jfs_logmgr.c:2130 lbmWrite+0x379/0x4a0 fs/jfs/jfs_logmgr.c:2079 lmNextPage+0x3a9/0xa60 fs/jfs/jfs_logmgr.c:624 lmWriteRecord+0xe5d/0x12e0 fs/jfs/jfs_logmgr.c:537 lmLogSync+0x4d5/0xad0 fs/jfs/jfs_logmgr.c:977 jfs_syncpt+0x79/0x90 fs/jfs/jfs_logmgr.c:1049 jfs_sync_fs+0x86/0xa0 fs/jfs/super.c:690 sync_filesystem+0xe8/0x220 fs/sync.c:56 generic_shutdown_super+0x6e/0x2c0 fs/super.c:448 kill_block_super+0x7a/0xe0 fs/super.c:1414 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f5862ac84c7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fff9a9a6028 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5862ac84c7 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff9a9a60e0 RBP: 00007fff9a9a60e0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000206 R12: 00007fff9a9a7150 R13: 00005555573f26c0 R14: 431bde82d7b634db R15: 00007fff9a9a7170 Modules linked in: ---[ end trace a57671faee10e6c2 ]--- RIP: 0010:bio_associate_blkg_from_css+0x113/0x960 block/blk-cgroup.c:1867 Code: ef 03 41 80 3c 2f 00 74 08 4c 89 f7 e8 46 d9 d4 fd bd d0 05 00 00 49 03 2e 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 1f d9 d4 fd bb 90 00 00 00 48 03 5d RSP: 0018:ffffc900020878d8 EFLAGS: 00010202 RAX: 00000000000000ba RBX: ffffffff915726f0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff915725e0 RDI: ffff88801dc92640 RBP: 00000000000005d0 R08: ffffffff83f529a4 R09: fffffbfff1f7a019 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff915725e0 R13: ffff88801dc92640 R14: ffff88801dc92648 R15: 1ffff11003b924c9 FS: 00005555573f1380(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555573fa6f8 CR3: 0000000013fcd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ef out %eax,(%dx) 1: 03 41 80 add -0x80(%rcx),%eax 4: 3c 2f cmp $0x2f,%al 6: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1) a: 89 f7 mov %esi,%edi c: e8 46 d9 d4 fd call 0xfdd4d957 11: bd d0 05 00 00 mov $0x5d0,%ebp 16: 49 03 2e add (%r14),%rbp 19: 48 89 e8 mov %rbp,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 ef mov %rbp,%rdi 33: e8 1f d9 d4 fd call 0xfdd4d957 38: bb 90 00 00 00 mov $0x90,%ebx 3d: 48 rex.W 3e: 03 .byte 0x3 3f: 5d pop %rbp