Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: kernel BUG in f2fs_write_end_io
F2FS-fs (loop3): inconsistent node block, node_type:0, nid:11, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] ------------[ cut here ]------------ kernel BUG at fs/f2fs/data.c:362! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 6596 Comm: udevd Not tainted 6.17.0-rc1-syzkaller-00023-g637a17c27a3d #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:f2fs_write_end_io+0xb52/0xb60 fs/f2fs/data.c:361 Code: e8 d3 f8 14 fe e9 91 f6 ff ff 89 d9 80 e1 07 38 c1 0f 8c e3 f6 ff ff 48 89 df e8 49 f9 14 fe e9 d6 f6 ff ff e8 2f bc b3 fd 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000a08c98 EFLAGS: 00010246 RAX: ffffffff840bee61 RBX: 0000000000000000 RCX: ffff88802bcc1e00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 000000000000000b RBP: ffff888032b70780 R08: ffffea0001c68b47 R09: 1ffffd400038d168 R10: dffffc0000000000 R11: fffff9400038d169 R12: 0000000000000006 R13: ffffea0001c68b40 R14: 000000000000000b R15: dffffc0000000000 FS: 00007ff87043e880(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555da2608 CR3: 00000000297cc000 CR4: 00000000003526f0 Call Trace: <IRQ> blk_update_request+0x57e/0xe60 block/blk-mq.c:989 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1151 blk_complete_reqs block/blk-mq.c:1226 [inline] blk_done_softirq+0x107/0x160 block/blk-mq.c:1231 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_release+0x2b5/0x3e0 kernel/locking/lockdep.c:5893 Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 8b 52 ff 10 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc9000405f7f0 EFLAGS: 00000206 RAX: c28614321895e300 RBX: 0000000000000202 RCX: c28614321895e300 RDX: 0000000000000000 RSI: ffffffff8db908ee RDI: ffffffff8be25680 RBP: ffff88802bcc28f0 R08: ffffc9000405fc88 R09: 0000000000000000 R10: ffffc9000405f978 R11: fffff5200080bf31 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff8e139ee0 R15: ffff88802bcc1e00 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2417 [inline] slab_free mm/slub.c:4680 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4782 vfs_fstatat+0x122/0x170 fs/stat.c:376 __do_sys_newfstatat fs/stat.c:542 [inline] __se_sys_newfstatat fs/stat.c:536 [inline] __x64_sys_newfstatat+0x116/0x190 fs/stat.c:536 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff86fd11b0a Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7 RSP: 002b:00007ffe39f06778 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00007ffe39f06c10 RCX: 00007ff86fd11b0a RDX: 00007ffe39f06780 RSI: 00007ffe39f06c10 RDI: 00000000ffffff9c RBP: 0000559859a37910 R08: 0000000000000000 R09: 0000000000000020 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe39f06810 R13: 00007ffe39f07045 R14: 00005598470f0ca4 R15: 00005598470f0bcc </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_write_end_io+0xb52/0xb60 fs/f2fs/data.c:361 Code: e8 d3 f8 14 fe e9 91 f6 ff ff 89 d9 80 e1 07 38 c1 0f 8c e3 f6 ff ff 48 89 df e8 49 f9 14 fe e9 d6 f6 ff ff e8 2f bc b3 fd 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000a08c98 EFLAGS: 00010246 RAX: ffffffff840bee61 RBX: 0000000000000000 RCX: ffff88802bcc1e00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 000000000000000b RBP: ffff888032b70780 R08: ffffea0001c68b47 R09: 1ffffd400038d168 R10: dffffc0000000000 R11: fffff9400038d169 R12: 0000000000000006 R13: ffffea0001c68b40 R14: 000000000000000b R15: dffffc0000000000 FS: 00007ff87043e880(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555da2608 CR3: 00000000297cc000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 51 push %rcx 1: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp) 8: 00 00 a: 9c pushf b: 8f 44 24 20 pop 0x20(%rsp) f: f7 44 24 20 00 02 00 testl $0x200,0x20(%rsp) 16: 00 17: 75 56 jne 0x6f 19: f7 c3 00 02 00 00 test $0x200,%ebx 1f: 74 01 je 0x22 21: fb sti 22: 65 48 8b 05 8b 52 ff mov %gs:0x10ff528b(%rip),%rax # 0x10ff52b5 29: 10 * 2a: 48 3b 44 24 28 cmp 0x28(%rsp),%rax <-- trapping instruction 2f: 0f 85 8b 00 00 00 jne 0xc0 35: 48 83 c4 30 add $0x30,%rsp 39: 5b pop %rbx 3a: 41 5c pop %r12 3c: 41 5d pop %r13 3e: 41 5e pop %r14 Tested on: commit: 637a17c2 f2fs: fix to do sanity check on node footer i.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git bugfix/common console output: https://syzkaller.appspot.com/x/log.txt?x=1026f434580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1f6e4cb78ac1b7bb dashboard link: https://syzkaller.appspot.com/bug?extid=803dd716c4310d16ff3a compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 Note: no patches were applied. _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
