RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000020000080 RBP: 00007ffc4b618b90 R08: 0000000000000000 R09: 0000000000003636 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffc4b618c30 R14: 00007ffc4b618bf0 R15: 0000000000000001 general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 1 PID: 4070 Comm: syz-executor369 Not tainted 5.16.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ext4_fill_super+0x2c7/0xccc0 fs/ext4/super.c:5656 Code: 8d be a8 06 00 00 4c 89 b8 f0 00 00 00 e8 d1 b0 84 01 49 8d bf 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 de 3e 00 00 48 8b 85 e8 fe ff ff 48 8d bb 88 00 RSP: 0018:ffffc900025cfac0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88801cd69300 RCX: 0000000000000004 RDX: 0000000000000012 RSI: 000000000000002f RDI: 0000000000000090 RBP: ffffc900025cfd10 R08: 0000000000000dc0 R09: ffffffff8acbdf93 R10: fffffbfff1597bf2 R11: 3e4b5341542f3c20 R12: ffff88801009cd18 R13: ffff8880196724f8 R14: ffff88801d348000 R15: 0000000000000000 FS: 0000555555d493c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc4b618b98 CR3: 00000000770b6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: get_tree_bdev+0x398/0x680 fs/super.c:1295 vfs_get_tree+0x7f/0x2c0 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x41e/0x1a30 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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: 0033:0x7f43c0dd0a39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc4b618b88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f43c0dd0a39 RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000020000080 RBP: 00007ffc4b618b90 R08: 0000000000000000 R09: 0000000000003636 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffc4b618c30 R14: 00007ffc4b618bf0 R15: 0000000000000001 Modules linked in: ---[ end trace 478559488d8a3c49 ]--- RIP: 0010:ext4_fill_super+0x2c7/0xccc0 fs/ext4/super.c:5656 Code: 8d be a8 06 00 00 4c 89 b8 f0 00 00 00 e8 d1 b0 84 01 49 8d bf 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 de 3e 00 00 48 8b 85 e8 fe ff ff 48 8d bb 88 00 RSP: 0018:ffffc900025cfac0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88801cd69300 RCX: 0000000000000004 RDX: 0000000000000012 RSI: 000000000000002f RDI: 0000000000000090 RBP: ffffc900025cfd10 R08: 0000000000000dc0 R09: ffffffff8acbdf93 R10: fffffbfff1597bf2 R11: 3e4b5341542f3c20 R12: ffff88801009cd18 R13: ffff8880196724f8 R14: ffff88801d348000 R15: 0000000000000000 FS: 0000555555d493c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc4b618b98 CR3: 00000000770b6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d be a8 06 00 00 lea 0x6a8(%rsi),%edi 6: 4c 89 b8 f0 00 00 00 mov %r15,0xf0(%rax) d: e8 d1 b0 84 01 callq 0x184b0e3 12: 49 8d bf 90 00 00 00 lea 0x90(%r15),%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 de 3e 00 00 jne 0x3f12 34: 48 8b 85 e8 fe ff ff mov -0x118(%rbp),%rax 3b: 48 rex.W 3c: 8d .byte 0x8d 3d: bb .byte 0xbb 3e: 88 00 mov %al,(%rax)