syzbot


BUG: spinlock bad magic in bpf_lru_pop_free

Status: auto-closed as invalid on 2021/12/11 05:44
Reported-by: syzbot+9e56d539ab08fff1ac06@syzkaller.appspotmail.com
First crash: 341d, last: 341d

Sample crash report:
BUG: spinlock bad magic on CPU#1, syz-executor.0/29788
 lock: 0xffffe8ffffd74468, .magic: 00000000, .owner: <none>/-1, .owner_cpu: -1
CPU: 1 PID: 29788 Comm: syz-executor.0 Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
 debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 do_raw_spin_lock+0x216/0x2b0 kernel/locking/spinlock_debug.c:112
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline]
 _raw_spin_lock_irqsave+0x41/0x50 kernel/locking/spinlock.c:159
 bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:443 [inline]
 bpf_lru_pop_free+0x30c/0x16d0 kernel/bpf/bpf_lru_list.c:499
 prealloc_lru_pop+0x26/0x90 kernel/bpf/hashtab.c:264
 htab_lru_map_update_elem+0x157/0x7b0 kernel/bpf/hashtab.c:1102
 bpf_map_update_value.isra.0+0x6a7/0x8e0 kernel/bpf/syscall.c:206
 generic_map_update_batch+0x3cf/0x560 kernel/bpf/syscall.c:1371
 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4076
 __sys_bpf+0x1d66/0x53b0 kernel/bpf/syscall.c:4533
 __do_sys_bpf kernel/bpf/syscall.c:4573 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4571 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4571
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5f3bdbc188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000038 RSI: 0000000020000580 RDI: 000000000000001a
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe8f3bb10f R14: 00007f5f3bdbc300 R15: 0000000000022000

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-bpf-kasan-gce 2021/09/12 05:44 bpf 57f780f1c433 5ae8508a .config log report info BUG: spinlock bad magic in bpf_lru_pop_free