general protection fault, probably for non-canonical address 0xdffffc0000000011: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f] CPU: 0 PID: 5104 Comm: syz-executor.0 Not tainted 6.3.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:evict_linked_inode fs/gfs2/super.c:1370 [inline] RIP: 0010:gfs2_evict_inode+0xa0b/0x14a0 fs/gfs2/super.c:1420 Code: fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 9e c8 26 fe bb 8c 00 00 00 49 03 1e 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 18 09 00 00 8b 13 45 31 e4 4c 89 ff 31 f6 RSP: 0018:ffffc9000424f9a0 EFLAGS: 00010207 RAX: 0000000000000011 RBX: 000000000000008c RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000424fb40 R08: ffffffff83b282dd R09: ffffed100f9a2769 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888040909f98 R13: ffff888040909ae0 R14: ffff888079b10900 R15: ffff888079b10000 FS: 0000555555c03400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb66690e2c2 CR3: 00000000511dd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: evict+0x2a4/0x620 fs/inode.c:665 gfs2_jindex_free+0x44d/0x500 fs/gfs2/super.c:75 gfs2_put_super+0x81f/0x890 fs/gfs2/super.c:631 generic_shutdown_super+0x134/0x340 fs/super.c:500 kill_block_super+0x7e/0xe0 fs/super.c:1407 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f599a08d567 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 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 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc0c1f1498 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f599a08d567 RDX: 00007ffc0c1f156b RSI: 000000000000000a RDI: 00007ffc0c1f1560 RBP: 00007ffc0c1f1560 R08: 00000000ffffffff R09: 00007ffc0c1f1330 R10: 0000555555c048b3 R11: 0000000000000246 R12: 00007f599a0e6b74 R13: 00007ffc0c1f2620 R14: 0000555555c04810 R15: 00007ffc0c1f2660 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:evict_linked_inode fs/gfs2/super.c:1370 [inline] RIP: 0010:gfs2_evict_inode+0xa0b/0x14a0 fs/gfs2/super.c:1420 Code: fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 9e c8 26 fe bb 8c 00 00 00 49 03 1e 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 18 09 00 00 8b 13 45 31 e4 4c 89 ff 31 f6 RSP: 0018:ffffc9000424f9a0 EFLAGS: 00010207 RAX: 0000000000000011 RBX: 000000000000008c RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000424fb40 R08: ffffffff83b282dd R09: ffffed100f9a2769 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888040909f98 R13: ffff888040909ae0 R14: ffff888079b10900 R15: ffff888079b10000 FS: 0000555555c03400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555658e708 CR3: 00000000511dd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: df 80 3c 08 00 74 filds 0x7400083c(%rax) 6: 08 4c 89 f7 or %cl,-0x9(%rcx,%rcx,4) a: e8 9e c8 26 fe callq 0xfe26c8ad f: bb 8c 00 00 00 mov $0x8c,%ebx 14: 49 03 1e add (%r14),%rbx 17: 48 89 d8 mov %rbx,%rax 1a: 48 c1 e8 03 shr $0x3,%rax 1e: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 25: fc ff df * 28: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2c: 84 c0 test %al,%al 2e: 0f 85 18 09 00 00 jne 0x94c 34: 8b 13 mov (%rbx),%edx 36: 45 31 e4 xor %r12d,%r12d 39: 4c 89 ff mov %r15,%rdi 3c: 31 f6 xor %esi,%esi