RBP: 00000000f58d54c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 0 PID: 24267 Comm: syz-executor.3 Not tainted 5.16.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:ext4_fill_super+0x2be/0xe800 fs/ext4/super.c:5553 Code: 8d be a8 06 00 00 4c 89 b8 f0 00 00 00 e8 fa 29 ba 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 8b 5b 00 00 48 8b 44 24 08 48 8d bb 88 00 00 00 RSP: 0018:ffffc90020c3fac8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88806c7df700 RCX: ffffc90003132000 RDX: 0000000000000012 RSI: ffffffff83dd73bc RDI: 0000000000000090 RBP: ffff88806c32e8a0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff83dd737b R11: 0000000000000000 R12: ffff888073214c00 R13: 000000000000000c R14: ffff88806bd98000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f58d5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7039034 CR3: 00000000737f0000 CR4: 0000000000150ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: get_tree_bdev+0x440/0x760 fs/super.c:1295 vfs_get_tree+0x89/0x2f0 fs/super.c:1500 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3522 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf6edb549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f58d5410 EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00000000f58d5480 RCX: 0000000020000040 RDX: 0000000020000000 RSI: 0000000000008008 RDI: 00000000f58d54c0 RBP: 00000000f58d54c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 24475e3f071eea04 ]--- RIP: 0010:ext4_fill_super+0x2be/0xe800 fs/ext4/super.c:5553 Code: 8d be a8 06 00 00 4c 89 b8 f0 00 00 00 e8 fa 29 ba 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 8b 5b 00 00 48 8b 44 24 08 48 8d bb 88 00 00 00 RSP: 0018:ffffc90020c3fac8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88806c7df700 RCX: ffffc90003132000 RDX: 0000000000000012 RSI: ffffffff83dd73bc RDI: 0000000000000090 RBP: ffff88806c32e8a0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff83dd737b R11: 0000000000000000 R12: ffff888073214c00 R13: 000000000000000c R14: ffff88806bd98000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f58d5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7039034 CR3: 00000000737f0000 CR4: 0000000000150ef0 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 fa 29 ba 01 callq 0x1ba2a0c 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 8b 5b 00 00 jne 0x5bbf 34: 48 8b 44 24 08 mov 0x8(%rsp),%rax 39: 48 8d bb 88 00 00 00 lea 0x88(%rbx),%rdi