Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 5786 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:NODE_MAPPING fs/f2fs/f2fs.h:2260 [inline] RIP: 0010:is_node_folio fs/f2fs/f2fs.h:2270 [inline] RIP: 0010:f2fs_in_warm_node_list+0xbd/0x290 fs/f2fs/node.c:330 Code: 00 00 4d 03 3c 24 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 d1 c0 fd fd 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 b4 c0 fd fd 4d 3b 37 74 19 e8 8a RSP: 0018:ffffc900044975c8 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffea0001954740 RCX: ffff8880398c3c80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: ffffea0001954758 R08: ffffffff8f6a2db7 R09: 1ffffffff1ed45b6 R10: dffffc0000000000 R11: fffffbfff1ed45b7 R12: ffff88803a000798 R13: dffffc0000000000 R14: ffff8880624ee3d0 R15: 0000000000000030 FS: 00007f2bccc7d880(0000) GS:ffff888126342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557300a9e8 CR3: 0000000036fc2000 CR4: 00000000003526f0 Call Trace: f2fs_write_end_io+0x7ab/0xff0 fs/f2fs/data.c:400 blk_update_request+0x57e/0xe60 block/blk-mq.c:1016 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1178 blk_complete_reqs block/blk-mq.c:1253 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1258 handle_softirqs+0x1de/0x6f0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] __local_bh_enable_ip+0x170/0x2b0 kernel/softirq.c:302 local_bh_enable include/linux/bottom_half.h:33 [inline] __alloc_skb+0x1aa/0x7d0 net/core/skbuff.c:697 netlink_sendmsg+0x5d4/0xb40 net/netlink/af_netlink.c:1869 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa4e/0xac0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x1c3/0x2a0 net/socket.c:2681 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2bccd6b407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007ffc8332e760 EFLAGS: 00000202 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f2bccc7d880 RCX: 00007f2bccd6b407 RDX: 0000000000000000 RSI: 00007ffc8332e7c0 RDI: 000000000000000c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000000c8 R13: 000055ba243d1040 R14: 0000000000000000 R15: 000055ba243cea00 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:NODE_MAPPING fs/f2fs/f2fs.h:2260 [inline] RIP: 0010:is_node_folio fs/f2fs/f2fs.h:2270 [inline] RIP: 0010:f2fs_in_warm_node_list+0xbd/0x290 fs/f2fs/node.c:330 Code: 00 00 4d 03 3c 24 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 d1 c0 fd fd 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 b4 c0 fd fd 4d 3b 37 74 19 e8 8a RSP: 0018:ffffc900044975c8 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffffea0001954740 RCX: ffff8880398c3c80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: ffffea0001954758 R08: ffffffff8f6a2db7 R09: 1ffffffff1ed45b6 R10: dffffc0000000000 R11: fffffbfff1ed45b7 R12: ffff88803a000798 R13: dffffc0000000000 R14: ffff8880624ee3d0 R15: 0000000000000030 FS: 00007f2bccc7d880(0000) GS:ffff888126342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557300a9e8 CR3: 0000000036fc2000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 4d 03 3c 24 add (%r12),%r15 6: 4c 89 f8 mov %r15,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 12: 74 08 je 0x1c 14: 4c 89 ff mov %r15,%rdi 17: e8 d1 c0 fd fd call 0xfdfdc0ed 1c: 4d 8b 3f mov (%r15),%r15 1f: 49 83 c7 30 add $0x30,%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ff mov %r15,%rdi 34: e8 b4 c0 fd fd call 0xfdfdc0ed 39: 4d 3b 37 cmp (%r15),%r14 3c: 74 19 je 0x57 3e: e8 .byte 0xe8 3f: 8a .byte 0x8a