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: 15305 Comm: syz-executor.1 Not tainted 5.18.0-syzkaller-10139-g8291eaafed36 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:block_is_partially_uptodate+0x154/0x610 fs/buffer.c:2240 Code: 39 e3 0f 87 5e 01 00 00 48 8b 1c 24 31 ed eb 32 e8 e1 5c 95 ff 48 8d 7b 08 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 10 04 00 00 48 8b 5b 08 48 3b 1c 24 0f 84 93 00 RSP: 0000:ffffc900036afba0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000040000 RSI: ffffffff81e443ff RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000001000 R15: 0000000000000000 FS: 00007fef925f1700(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3354b000 CR3: 000000001bf30000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: folio_seek_hole_data mm/filemap.c:2850 [inline] mapping_seek_hole_data+0xc29/0x1330 mm/filemap.c:2911 iomap_seek_data_iter fs/iomap/seek.c:68 [inline] iomap_seek_data+0x137/0x2c0 fs/iomap/seek.c:96 ext4_llseek+0x272/0x2e0 fs/ext4/file.c:902 vfs_llseek fs/read_write.c:300 [inline] ksys_lseek+0x14f/0x1b0 fs/read_write.c:313 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+0x46/0xb0 RIP: 0033:0x7fef91489109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fef925f1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 RAX: ffffffffffffffda RBX: 00007fef9159c030 RCX: 00007fef91489109 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fef914e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc21d5c4bf R14: 00007fef925f1300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:block_is_partially_uptodate+0x154/0x610 fs/buffer.c:2240 Code: 39 e3 0f 87 5e 01 00 00 48 8b 1c 24 31 ed eb 32 e8 e1 5c 95 ff 48 8d 7b 08 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 10 04 00 00 48 8b 5b 08 48 3b 1c 24 0f 84 93 00 RSP: 0000:ffffc900036afba0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000040000 RSI: ffffffff81e443ff RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000001000 R15: 0000000000000000 FS: 00007fef925f1700(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33561000 CR3: 000000001bf30000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 39 e3 cmp %esp,%ebx 2: 0f 87 5e 01 00 00 ja 0x166 8: 48 8b 1c 24 mov (%rsp),%rbx c: 31 ed xor %ebp,%ebp e: eb 32 jmp 0x42 10: e8 e1 5c 95 ff callq 0xff955cf6 15: 48 8d 7b 08 lea 0x8(%rbx),%rdi 19: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 20: fc ff df 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 0f 85 10 04 00 00 jne 0x444 34: 48 8b 5b 08 mov 0x8(%rbx),%rbx 38: 48 3b 1c 24 cmp (%rsp),%rbx 3c: 0f .byte 0xf 3d: 84 .byte 0x84 3e: 93 xchg %eax,%ebx