general protection fault, probably for non-canonical address 0xdffffc0000000011: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f] CPU: 3 PID: 9931 Comm: syz-executor.1 Not tainted 6.3.0-rc6-syzkaller-00188-g3e7bb4f24617 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:evict_linked_inode fs/gfs2/super.c:1370 [inline] RIP: 0010:gfs2_evict_inode+0xf02/0x1c10 fs/gfs2/super.c:1420 Code: 03 80 3c 02 00 0f 85 e7 0b 00 00 48 8b 9d 00 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 8c 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d3 RSP: 0018:ffffc90002e9f978 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000011 RSI: ffffffff8395ba51 RDI: 000000000000008c RBP: ffff888027fe4000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff8880291191a8 R14: ffff888029119638 R15: ffff888029119180 FS: 00005555555c6400(0000) GS:ffff88802c900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31c3e000 CR3: 00000000614e3000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput.part.0+0x50a/0x740 fs/inode.c:1774 iput+0x5c/0x80 fs/inode.c:1764 gfs2_jindex_free+0x391/0x560 fs/gfs2/super.c:75 gfs2_put_super+0x48f/0x670 fs/gfs2/super.c:631 generic_shutdown_super+0x158/0x480 fs/super.c:500 kill_block_super+0x9b/0xf0 fs/super.c:1407 gfs2_kill_sb+0x378/0x430 fs/gfs2/ops_fstype.c:1807 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fefffc8d5d7 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:00007ffcba2ab968 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fefffc8d5d7 RDX: 00007ffcba2aba3b RSI: 000000000000000a RDI: 00007ffcba2aba30 RBP: 00007ffcba2aba30 R08: 00000000ffffffff R09: 00007ffcba2ab800 R10: 00005555555c78b3 R11: 0000000000000246 R12: 00007fefffce6cdc R13: 00007ffcba2acaf0 R14: 00005555555c7810 R15: 00007ffcba2acb30 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:evict_linked_inode fs/gfs2/super.c:1370 [inline] RIP: 0010:gfs2_evict_inode+0xf02/0x1c10 fs/gfs2/super.c:1420 Code: 03 80 3c 02 00 0f 85 e7 0b 00 00 48 8b 9d 00 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 8c 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d3 RSP: 0018:ffffc90002e9f978 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000011 RSI: ffffffff8395ba51 RDI: 000000000000008c RBP: ffff888027fe4000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff8880291191a8 R14: ffff888029119638 R15: ffff888029119180 FS: 00005555555c6400(0000) GS:ffff88802c900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31c35000 CR3: 00000000614e3000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 03 80 3c 02 00 0f add 0xf00023c(%rax),%eax 6: 85 e7 test %esp,%edi 8: 0b 00 or (%rax),%eax a: 00 48 8b add %cl,-0x75(%rax) d: 9d popfq e: 00 09 add %cl,(%rcx) 10: 00 00 add %al,(%rax) 12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 19: fc ff df 1c: 48 8d bb 8c 00 00 00 lea 0x8c(%rbx),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 48 89 f8 mov %rdi,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 d3 test %edx,%ebx