Hello, syzbot found the following issue on: HEAD commit: 3d650ab5e7d9 selftests/bpf: Fix a btf_dump selftest failure git tree: bpf-next console output: https://syzkaller.appspot.com/x/log.txt?x=13a4c1a1980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5efb917b1462a973 dashboard link: https://syzkaller.appspot.com/bug?extid=d6fb861ed047a275747a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/630e210de8d9/disk-3d650ab5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3576ca35748a/vmlinux-3d650ab5.xz kernel image: https://storage.googleapis.com/syzbot-assets/5b33f099abfa/bzImage-3d650ab5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d6fb861ed047a275747a@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: spinlock recursion on CPU#1, syz.4.1173/11483 lock: 0xffff888046908300, .magic: dead4ead, .owner: syz.4.1173/11483, .owner_cpu: 1 CPU: 1 UID: 0 PID: 11483 Comm: syz.4.1173 Not tainted 6.10.0-syzkaller-12666-g3d650ab5e7d9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 debug_spin_lock_before kernel/locking/spinlock_debug.c:87 [inline] do_raw_spin_lock+0x227/0x370 kernel/locking/spinlock_debug.c:115 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162 bpf_lru_list_push_free kernel/bpf/bpf_lru_list.c:318 [inline] bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:538 [inline] bpf_lru_push_free+0x1a7/0xb60 kernel/bpf/bpf_lru_list.c:561 htab_lru_map_delete_elem+0x613/0x700 kernel/bpf/hashtab.c:1475 bpf_prog_6f5f05285f674219+0x43/0x4c bpf_dispatcher_nop_func include/linux/bpf.h:1252 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2447 trace_contention_begin+0x117/0x140 include/trace/events/lock.h:95 __pv_queued_spin_lock_slowpath+0x114/0xdc0 kernel/locking/qspinlock.c:402 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline] queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] lockdep_lock+0x1b0/0x2b0 kernel/locking/lockdep.c:143 graph_lock kernel/locking/lockdep.c:169 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3803 [inline] validate_chain+0x21d/0x5900 kernel/locking/lockdep.c:3836 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 htab_lock_bucket+0x1a4/0x370 kernel/bpf/hashtab.c:167 htab_lru_map_delete_node+0x161/0x840 kernel/bpf/hashtab.c:817 __bpf_lru_list_shrink_inactive kernel/bpf/bpf_lru_list.c:225 [inline] __bpf_lru_list_shrink+0x156/0x9d0 kernel/bpf/bpf_lru_list.c:271 bpf_lru_list_pop_free_to_local kernel/bpf/bpf_lru_list.c:345 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:452 [inline] bpf_lru_pop_free+0xd84/0x1a70 kernel/bpf/bpf_lru_list.c:504 prealloc_lru_pop kernel/bpf/hashtab.c:308 [inline] __htab_lru_percpu_map_update_elem+0x242/0x9b0 kernel/bpf/hashtab.c:1355 bpf_percpu_hash_update+0x11a/0x200 kernel/bpf/hashtab.c:2421 bpf_map_update_value+0x347/0x540 kernel/bpf/syscall.c:181 generic_map_update_batch+0x60d/0x900 kernel/bpf/syscall.c:1889 bpf_map_do_batch+0x3e0/0x690 kernel/bpf/syscall.c:5218 __sys_bpf+0x377/0x810 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fed319779f9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fed327ee048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fed31b05f80 RCX: 00007fed319779f9 RDX: 0000000000000038 RSI: 0000000020000580 RDI: 000000000000001a RBP: 00007fed319e58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fed31b05f80 R15: 00007ffcf9a1d7f8 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
