general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 2956 Comm: mount Not tainted 5.15.0-rc6-next-20211019-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:blk_mq_free_request+0x16d/0x5d0 block/blk-mq.c:589 Code: 48 8b 9d d8 00 00 00 48 85 db 0f 84 7c 02 00 00 e8 48 3d b3 fd 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 34 04 00 00 48 8b 7b 08 e8 90 97 fe ff 4c 89 fa RSP: 0018:ffffc90000dc0ca0 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: 0000000000000007 RCX: 0000000000000100 RDX: 0000000000000001 RSI: ffffffff83c437a8 RDI: 000000000000000f RBP: ffff88801d12cc00 R08: 0000000000000001 R09: ffff88801d022cbf R10: ffffffff83ce54c3 R11: 0000000000000000 R12: ffff88814739d2e0 R13: ffff88801d12cc1c R14: ffff88801b511000 R15: ffff88801d12ccd8 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005621fd575451 CR3: 000000007bc14000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __blk_mq_end_request+0x339/0x580 block/blk-mq.c:782 blk_flush_complete_seq+0x561/0x1040 block/blk-flush.c:204 flush_end_io+0x76e/0xbf0 block/blk-flush.c:259 __blk_mq_end_request+0x123/0x580 block/blk-mq.c:780 scsi_end_request+0x485/0x980 drivers/scsi/scsi_lib.c:577 scsi_io_completion+0x24f/0x1650 drivers/scsi/scsi_lib.c:939 scsi_complete+0x129/0x3b0 drivers/scsi/scsi_lib.c:1433 blk_complete_reqs+0xad/0xe0 block/blk-mq.c:852 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 common_interrupt+0xa9/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:629 RIP: 0010:__find_get_block+0x229/0xdb0 fs/buffer.c:1343 Code: 8d e1 9d ff 49 8d 7f 60 be 04 00 00 00 e8 4f 7d e4 ff f0 41 ff 47 60 eb 03 45 31 ed e8 70 e1 9d ff e8 cb 27 a4 ff fb 4d 85 ed <0f> 84 b2 01 00 00 e8 5c e1 9d ff 0f 1f 44 00 00 e8 52 e1 9d ff e8 RSP: 0018:ffffc90001aff4f0 EFLAGS: 00000286 RAX: 0000000000002371 RBX: 0000000000000000 RCX: 1ffffffff1feff26 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888016f8f658 R08: 0000000000000001 R09: ffffffff8ff46a97 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000021e2 R13: ffff8880112d9828 R14: 0000000000035d40 R15: ffff8880112d9828 __getblk_gfp+0x28/0x80 fs/buffer.c:1367 sb_getblk include/linux/buffer_head.h:327 [inline] ext4_getblk+0x1d7/0x6b0 fs/ext4/inode.c:854 ext4_bread_batch+0x7c/0x550 fs/ext4/inode.c:921 __ext4_find_entry+0x482/0x1050 fs/ext4/namei.c:1600 ext4_lookup_entry fs/ext4/namei.c:1701 [inline] ext4_lookup fs/ext4/namei.c:1769 [inline] ext4_lookup+0x4fc/0x730 fs/ext4/namei.c:1760 lookup_open.isra.0+0x69f/0x13d0 fs/namei.c:3260 open_last_lookups fs/namei.c:3352 [inline] path_openat+0x9a5/0x2740 fs/namei.c:3558 do_filp_open+0x1aa/0x400 fs/namei.c:3588 do_sys_openat2+0x16d/0x4d0 fs/open.c:1200 do_sys_open fs/open.c:1216 [inline] __do_sys_open fs/open.c:1224 [inline] __se_sys_open fs/open.c:1220 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1220 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f3c9e4d01b7 Code: f3 c3 90 f7 d8 89 05 88 bf 20 00 b8 ff ff ff ff c3 66 90 c7 05 76 bf 20 00 16 00 00 00 b8 ff ff ff ff c3 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 59 bf 20 00 f7 d8 89 01 48 83 RSP: 002b:00007ffda1de42f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffda1de43e0 RCX: 00007f3c9e4d01b7 RDX: 00007f3c9e6d5000 RSI: 0000000000080000 RDI: 00007f3c9e6d6388 RBP: 00007ffda1de4350 R08: 0000000000000000 R09: 00007ffda1de43cf R10: 00007ffda1de43e0 R11: 0000000000000246 R12: 00007f3c9e6d5000 R13: 0000000000000000 R14: 00007ffda1de43cf R15: 0000000000000000 Modules linked in: ---[ end trace 616f4a12e908f46c ]--- RIP: 0010:blk_mq_free_request+0x16d/0x5d0 block/blk-mq.c:589 Code: 48 8b 9d d8 00 00 00 48 85 db 0f 84 7c 02 00 00 e8 48 3d b3 fd 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 34 04 00 00 48 8b 7b 08 e8 90 97 fe ff 4c 89 fa RSP: 0018:ffffc90000dc0ca0 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: 0000000000000007 RCX: 0000000000000100 RDX: 0000000000000001 RSI: ffffffff83c437a8 RDI: 000000000000000f RBP: ffff88801d12cc00 R08: 0000000000000001 R09: ffff88801d022cbf R10: ffffffff83ce54c3 R11: 0000000000000000 R12: ffff88814739d2e0 R13: ffff88801d12cc1c R14: ffff88801b511000 R15: ffff88801d12ccd8 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005621fd575451 CR3: 000000007bc14000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 8b 9d d8 00 00 00 mov 0xd8(%rbp),%rbx 7: 48 85 db test %rbx,%rbx a: 0f 84 7c 02 00 00 je 0x28c 10: e8 48 3d b3 fd callq 0xfdb33d5d 15: 48 8d 7b 08 lea 0x8(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 34 04 00 00 jne 0x468 34: 48 8b 7b 08 mov 0x8(%rbx),%rdi 38: e8 90 97 fe ff callq 0xfffe97cd 3d: 4c 89 fa mov %r15,%rdx