loop0: detected capacity change from 0 to 32768 ocfs2: Readonly device (7,0) detected. Cluster services will not be used for this mount. Recovery will be skipped. ocfs2: Mounting device (7,0) on (node local, slot 65535) with ordered data mode. ocfs2: Unmounting device (7,0) on (node local) Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 5349 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ocfs2_clear_inode fs/ocfs2/inode.c:1284 [inline] RIP: 0010:ocfs2_evict_inode+0x2d05/0x40e0 fs/ocfs2/inode.c:1296 Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 2c d7 83 fe 4d 01 f4 48 8b 1b 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 0c d7 83 fe 48 8b 3b 49 81 c7 88 RSP: 0018:ffffc9000ff0f340 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000100000 RDX: ffffc9000de12000 RSI: 0000000000007b75 RDI: 0000000000007b76 RBP: ffffc9000ff0fa70 R08: ffff888043e8b0b7 R09: 1ffff110087d1616 R10: dffffc0000000000 R11: ffffed10087d1617 R12: fffff52001fe1e78 R13: ffff888043e8b360 R14: dffffc0000000000 R15: ffff888043e8b338 FS: 00007f07996776c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6066d5a000 CR3: 00000000439aa000 CR4: 0000000000352ef0 Call Trace: evict+0x504/0x9c0 fs/inode.c:810 __ocfs2_free_slot_info fs/ocfs2/slot_map.c:307 [inline] ocfs2_free_slot_info+0x79/0x260 fs/ocfs2/slot_map.c:443 ocfs2_delete_osb+0x58/0x170 fs/ocfs2/super.c:2450 ocfs2_dismount_volume+0x57a/0x8d0 fs/ocfs2/super.c:1884 generic_shutdown_super+0x135/0x2c0 fs/super.c:643 kill_block_super+0x44/0x90 fs/super.c:1766 deactivate_locked_super+0xb9/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f079879038a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0799676e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffec RBX: 00007f0799676ef0 RCX: 00007f079879038a RDX: 0000200000004480 RSI: 00002000000044c0 RDI: 00007f0799676eb0 RBP: 0000200000004480 R08: 00007f0799676ef0 R09: 0000000000800401 R10: 0000000000800401 R11: 0000000000000246 R12: 00002000000044c0 R13: 00007f0799676eb0 R14: 000000000000446c R15: 00002000000000c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_clear_inode fs/ocfs2/inode.c:1284 [inline] RIP: 0010:ocfs2_evict_inode+0x2d05/0x40e0 fs/ocfs2/inode.c:1296 Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 2c d7 83 fe 4d 01 f4 48 8b 1b 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 0c d7 83 fe 48 8b 3b 49 81 c7 88 RSP: 0018:ffffc9000ff0f340 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000100000 RDX: ffffc9000de12000 RSI: 0000000000007b75 RDI: 0000000000007b76 RBP: ffffc9000ff0fa70 R08: ffff888043e8b0b7 R09: 1ffff110087d1616 R10: dffffc0000000000 R11: ffffed10087d1617 R12: fffff52001fe1e78 R13: ffff888043e8b360 R14: dffffc0000000000 R15: ffff888043e8b338 FS: 00007f07996776c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc3ac98a4c CR3: 00000000439aa000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 02 00 add (%rax),%al 2: 00 48 89 add %cl,-0x77(%rax) 5: d8 48 c1 fmuls -0x3f(%rax) 8: e8 03 42 80 3c call 0x3c804210 d: 30 00 xor %al,(%rax) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 2c d7 83 fe call 0xfe83d745 19: 4d 01 f4 add %r14,%r12 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 08 add $0x8,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 0c d7 83 fe call 0xfe83d745 39: 48 8b 3b mov (%rbx),%rdi 3c: 49 rex.WB 3d: 81 .byte 0x81 3e: c7 (bad) 3f: 88 .byte 0x88