ocfs2: Unmounting device (7,9) on (node 0) Oops: general protection fault, probably for non-canonical address 0xdffffc0000000016: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in [ 366.308683][ T9534] KASAN: null-ptr-deref in range [0x00000000000000b0-0x00000000000000b7] CPU: 1 UID: 0 PID: 9534 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:ocfs2_ci_fully_checkpointed fs/ocfs2/journal.h:98 [inline] RIP: 0010:ocfs2_checkpoint_inode fs/ocfs2/journal.h:199 [inline] RIP: 0010:ocfs2_clear_inode fs/ocfs2/inode.c:1224 [inline] RIP: 0010:ocfs2_evict_inode+0x255b/0x43c0 fs/ocfs2/inode.c:1303 Code: 04 00 74 08 4c 89 f7 e8 93 1b 6e fe 4d 89 f7 4d 8b 36 48 81 c3 b0 00 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 67 1b 6e fe 48 8b 1b 48 c7 c7 c0 b2 RSP: 0018:ffffc90017e7f300 EFLAGS: 00010202 RAX: 0000000000000016 RBX: 00000000000000b0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8ba7f080 RDI: 00000000ffffffff RBP: ffffc90017e7fa50 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f1375f R12: 1ffff1100bacd56a R13: fffff52002fcfe74 R14: 0000000000000000 R15: ffff88805d66ab50 FS: 0000555589b72500(0000) GS:ffff888126244000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055df55498950 CR3: 00000000596fa000 CR4: 00000000003526f0 Call Trace: evict+0x624/0xb50 fs/inode.c:828 __ocfs2_free_slot_info fs/ocfs2/slot_map.c:311 [inline] ocfs2_free_slot_info+0x6f/0x220 fs/ocfs2/slot_map.c:465 ocfs2_delete_osb+0x58/0x170 fs/ocfs2/super.c:2449 ocfs2_dismount_volume+0x572/0x8d0 fs/ocfs2/super.c:1883 generic_shutdown_super+0x13d/0x2d0 fs/super.c:647 kill_block_super+0x44/0x90 fs/super.c:1665 deactivate_locked_super+0xbc/0x130 fs/super.c:477 cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:70 [inline] exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fef8c7de097 Code: a2 c7 05 5c 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffd1884f018 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fef8c8722ca RCX: 00007fef8c7de097 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd1884f0d0 RBP: 00007ffd1884f0d0 R08: 00007ffd188500d0 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd18850160 R13: 00007fef8c8722ca R14: 000000000005959b R15: 00007ffd188501a0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_ci_fully_checkpointed fs/ocfs2/journal.h:98 [inline] RIP: 0010:ocfs2_checkpoint_inode fs/ocfs2/journal.h:199 [inline] RIP: 0010:ocfs2_clear_inode fs/ocfs2/inode.c:1224 [inline] RIP: 0010:ocfs2_evict_inode+0x255b/0x43c0 fs/ocfs2/inode.c:1303 Code: 04 00 74 08 4c 89 f7 e8 93 1b 6e fe 4d 89 f7 4d 8b 36 48 81 c3 b0 00 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 67 1b 6e fe 48 8b 1b 48 c7 c7 c0 b2 RSP: 0018:ffffc90017e7f300 EFLAGS: 00010202 RAX: 0000000000000016 RBX: 00000000000000b0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8ba7f080 RDI: 00000000ffffffff RBP: ffffc90017e7fa50 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f1375f R12: 1ffff1100bacd56a R13: fffff52002fcfe74 R14: 0000000000000000 R15: ffff88805d66ab50 FS: 0000555589b72500(0000) GS:ffff888126244000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0d70503000 CR3: 00000000596fa000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 04 00 add $0x0,%al 2: 74 08 je 0xc 4: 4c 89 f7 mov %r14,%rdi 7: e8 93 1b 6e fe call 0xfe6e1b9f c: 4d 89 f7 mov %r14,%r15 f: 4d 8b 36 mov (%r14),%r14 12: 48 81 c3 b0 00 00 00 add $0xb0,%rbx 19: 48 89 d8 mov %rbx,%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 df mov %rbx,%rdi 33: e8 67 1b 6e fe call 0xfe6e1b9f 38: 48 8b 1b mov (%rbx),%rbx 3b: 48 rex.W 3c: c7 .byte 0xc7 3d: c7 .byte 0xc7 3e: c0 .byte 0xc0 3f: b2 .byte 0xb2