general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 PID: 13 Comm: ksoftirqd/0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:NODE_MAPPING fs/f2fs/f2fs.h:2003 [inline] RIP: 0010:f2fs_in_warm_node_list+0x4b/0x1b0 fs/f2fs/node.c:315 Code: 81 c6 c0 00 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 23 f2 8d ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 06 f2 8d ff 4d 8b 26 4c 8d 73 18 RSP: 0018:ffffc900000d79e8 EFLAGS: 00010006 RAX: 0000000000000006 RBX: ffffea00052de240 RCX: ffff888100322880 RDX: 0000000000000100 RSI: ffffea00052de240 RDI: ffff888111728000 RBP: ffffc900000d7a08 R08: ffffffff8792b9af R09: 1ffffffff0f25735 R10: dffffc0000000000 R11: fffffbfff0f25736 R12: dffffc0000000000 R13: ffffea00052de240 R14: 0000000000000030 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd8b1e7eb8 CR3: 000000010ffbd000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: f2fs_write_end_io+0x50f/0xae0 fs/f2fs/data.c:382 bio_endio+0x6a9/0x7c0 block/bio.c:1557 req_bio_endio block/blk-mq.c:786 [inline] blk_update_request+0x4c4/0xe60 block/blk-mq.c:931 blk_mq_end_request+0x41/0x80 block/blk-mq.c:1056 blk_flush_complete_seq+0x5b8/0xca0 block/blk-flush.c:210 flush_end_io+0x838/0xab0 block/blk-flush.c:268 __blk_mq_end_request+0x49d/0x570 block/blk-mq.c:1046 blk_mq_end_request+0x55/0x80 block/blk-mq.c:1058 lo_complete_rq+0x147/0x260 drivers/block/loop.c:365 blk_complete_reqs block/blk-mq.c:1136 [inline] blk_done_softirq+0x116/0x160 block/blk-mq.c:1141 handle_softirqs+0x1d7/0x600 kernel/softirq.c:642 run_ksoftirqd+0x28/0x30 kernel/softirq.c:1019 smpboot_thread_fn+0x4a0/0x910 kernel/smpboot.c:164 kthread+0x281/0x320 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:NODE_MAPPING fs/f2fs/f2fs.h:2003 [inline] RIP: 0010:f2fs_in_warm_node_list+0x4b/0x1b0 fs/f2fs/node.c:315 Code: 81 c6 c0 00 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 23 f2 8d ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 06 f2 8d ff 4d 8b 26 4c 8d 73 18 RSP: 0018:ffffc900000d79e8 EFLAGS: 00010006 RAX: 0000000000000006 RBX: ffffea00052de240 RCX: ffff888100322880 RDX: 0000000000000100 RSI: ffffea00052de240 RDI: ffff888111728000 RBP: ffffc900000d7a08 R08: ffffffff8792b9af R09: 1ffffffff0f25735 R10: dffffc0000000000 R11: fffffbfff0f25736 R12: dffffc0000000000 R13: ffffea00052de240 R14: 0000000000000030 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd8b1e7eb8 CR3: 000000010ffbd000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 81 c6 c0 00 00 00 add $0xc0,%esi 6: 4c 89 f0 mov %r14,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 12: 74 08 je 0x1c 14: 4c 89 f7 mov %r14,%rdi 17: e8 23 f2 8d ff call 0xff8df23f 1c: 4d 8b 36 mov (%r14),%r14 1f: 49 83 c6 30 add $0x30,%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 f7 mov %r14,%rdi 34: e8 06 f2 8d ff call 0xff8df23f 39: 4d 8b 26 mov (%r14),%r12 3c: 4c 8d 73 18 lea 0x18(%rbx),%r14