page: ffffea0000a056f0: 00000001ffffffff ffff888075630000 general protection fault, probably for non-canonical address 0xfbd59c000000001e: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead0000000000f0-0xdead0000000000f7] CPU: 0 PID: 20731 Comm: syz-executor.1 Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:jfs_flush_journal+0xbbf/0xec0 fs/jfs/jfs_logmgr.c:1596 Code: c8 4e 08 42 80 3c 2b 00 74 08 4c 89 f7 e8 e9 b1 d1 fe 4d 8b 26 4d 39 f4 0f 84 32 01 00 00 4d 8d 7c 24 f0 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 f5 00 00 00 41 0f b7 1f 89 de 81 e6 00 RSP: 0018:ffffc90004a77b20 EFLAGS: 00010a06 RAX: 1bd5a0000000001e RBX: 0000000000001000 RCX: ffff888017293c00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc90004a77c48 R08: ffffffff8176a40c R09: 1ffff9200094eecc R10: dffffc0000000000 R11: fffff5200094eecd R12: dead000000000100 R13: dffffc0000000000 R14: ffff88801e715228 R15: dead0000000000f0 FS: 0000555580933480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556654f978 CR3: 00000000642e2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_umount+0x170/0x3a0 fs/jfs/jfs_umount.c:58 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 deactivate_locked_super+0xc4/0x130 fs/super.c:472 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f313a67f1d7 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fffcd507f28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f313a67f1d7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffcd507fe0 RBP: 00007fffcd507fe0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffcd5090a0 R13: 00007f313a6c93b9 R14: 00000000000fe5b0 R15: 000000000000000f Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:jfs_flush_journal+0xbbf/0xec0 fs/jfs/jfs_logmgr.c:1596 Code: c8 4e 08 42 80 3c 2b 00 74 08 4c 89 f7 e8 e9 b1 d1 fe 4d 8b 26 4d 39 f4 0f 84 32 01 00 00 4d 8d 7c 24 f0 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 f5 00 00 00 41 0f b7 1f 89 de 81 e6 00 RSP: 0018:ffffc90004a77b20 EFLAGS: 00010a06 RAX: 1bd5a0000000001e RBX: 0000000000001000 RCX: ffff888017293c00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc90004a77c48 R08: ffffffff8176a40c R09: 1ffff9200094eecc R10: dffffc0000000000 R11: fffff5200094eecd R12: dead000000000100 R13: dffffc0000000000 R14: ffff88801e715228 R15: dead0000000000f0 FS: 0000555580933480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f40daee0000 CR3: 00000000642e2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c8 4e 08 42 enter $0x84e,$0x42 4: 80 3c 2b 00 cmpb $0x0,(%rbx,%rbp,1) 8: 74 08 je 0x12 a: 4c 89 f7 mov %r14,%rdi d: e8 e9 b1 d1 fe call 0xfed1b1fb 12: 4d 8b 26 mov (%r14),%r12 15: 4d 39 f4 cmp %r14,%r12 18: 0f 84 32 01 00 00 je 0x150 1e: 4d 8d 7c 24 f0 lea -0x10(%r12),%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 f5 00 00 00 jne 0x12c 37: 41 0f b7 1f movzwl (%r15),%ebx 3b: 89 de mov %ebx,%esi 3d: 81 .byte 0x81 3e: e6 00 out %al,$0x0