general protection fault, probably for non-canonical address 0xdffffc0000000045: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000228-0x000000000000022f] CPU: 0 PID: 16242 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-13534-gb01fe98d34f3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:nilfs_flush_segment+0x55/0x3d0 fs/nilfs2/segment.c:2155 Code: 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 5c 85 8d fe 4c 8b 3b 49 8d af 28 02 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 3c 85 8d fe 4c 8b 75 00 4d 85 f6 RSP: 0018:ffffc90012a06ad8 EFLAGS: 00010202 RAX: 0000000000000045 RBX: ffff88807ce40678 RCX: 0000000000040000 RDX: ffffc9000bc59000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 0000000000000228 R08: ffffffff8350bbe7 R09: fffffbfff209e04c R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff888042ba34c0 R15: 0000000000000000 FS: 00007f153c7b4700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555b70888 CR3: 00000000229d8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nilfs_writepage+0x1c5/0x220 fs/nilfs2/inode.c:201 writeout mm/migrate.c:907 [inline] fallback_migrate_folio mm/migrate.c:931 [inline] move_to_new_folio+0x7a1/0x14d0 mm/migrate.c:981 migrate_folio_move mm/migrate.c:1295 [inline] migrate_pages_batch mm/migrate.c:1827 [inline] migrate_pages+0x4c0b/0x6670 mm/migrate.c:1979 compact_zone+0x2bc9/0x45a0 mm/compaction.c:2420 compact_node+0x216/0x420 mm/compaction.c:2717 compact_nodes mm/compaction.c:2730 [inline] sysctl_compaction_handler+0xab/0x150 mm/compaction.c:2774 proc_sys_call_handler+0x545/0x8a0 fs/proc/proc_sysctl.c:604 do_iter_write+0x6ea/0xc50 fs/read_write.c:861 iter_file_splice_write+0x843/0xfe0 fs/splice.c:778 do_splice_from fs/splice.c:856 [inline] direct_splice_actor+0xe7/0x1c0 fs/splice.c:1023 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:978 do_splice_direct+0x283/0x3d0 fs/splice.c:1066 do_sendfile+0x620/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f153ba8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f153c7b4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f153bbac050 RCX: 00007f153ba8c0f9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000009 RBP: 00007f153bae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000264 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8b8813cf R14: 00007f153c7b4300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:nilfs_flush_segment+0x55/0x3d0 fs/nilfs2/segment.c:2155 Code: 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 5c 85 8d fe 4c 8b 3b 49 8d af 28 02 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 3c 85 8d fe 4c 8b 75 00 4d 85 f6 RSP: 0018:ffffc90012a06ad8 EFLAGS: 00010202 RAX: 0000000000000045 RBX: ffff88807ce40678 RCX: 0000000000040000 RDX: ffffc9000bc59000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 0000000000000228 R08: ffffffff8350bbe7 R09: fffffbfff209e04c R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff888042ba34c0 R15: 0000000000000000 FS: 00007f153c7b4700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002081e000 CR3: 00000000229d8000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 48 89 d8 mov %rbx,%rax 5: 48 c1 e8 03 shr $0x3,%rax 9: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) e: 74 08 je 0x18 10: 48 89 df mov %rbx,%rdi 13: e8 5c 85 8d fe callq 0xfe8d8574 18: 4c 8b 3b mov (%rbx),%r15 1b: 49 8d af 28 02 00 00 lea 0x228(%r15),%rbp 22: 48 89 e8 mov %rbp,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 ef mov %rbp,%rdi 33: e8 3c 85 8d fe callq 0xfe8d8574 38: 4c 8b 75 00 mov 0x0(%rbp),%r14 3c: 4d 85 f6 test %r14,%r14