Hello,
syzbot found the following issue on:
HEAD commit: c61bd26ae81a Linux 5.15.160
git tree: linux-5.15.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=152e3246980000
kernel config:
https://syzkaller.appspot.com/x/.config?x=235f0e81ca937c17
dashboard link:
https://syzkaller.appspot.com/bug?extid=fc37d916410f29b8588d
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/d61a97eef8b9/disk-c61bd26a.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/ab4908b4b59b/vmlinux-c61bd26a.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/d818fd46802b/bzImage-c61bd26a.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+fc37d9...@syzkaller.appspotmail.com
=============================
WARNING: suspicious RCU usage
5.15.160-syzkaller #0 Not tainted
-----------------------------
kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor.0/3900:
#0: ffffffff8c920280 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312
stack backtrace:
CPU: 1 PID: 3900 Comm: syz-executor.0 Not tainted 5.15.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
get_callchain_entry+0x2ac/0x3c0 kernel/events/callchain.c:161
get_perf_callchain+0xe6/0x810 kernel/events/callchain.c:187
__bpf_get_stack+0x378/0x570 kernel/bpf/stackmap.c:482
____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1490 [inline]
bpf_get_stack_raw_tp+0x1b2/0x220 kernel/trace/bpf_trace.c:1480
bpf_prog_d43750871481577d+0x3d/0x77c
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
bpf_prog_run_pin_on_cpu+0x62/0x130 include/linux/filter.h:652
bpf_prog_test_run_syscall+0x366/0x550 net/bpf/test_run.c:1055
bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3368
__sys_bpf+0x3ac/0x670 kernel/bpf/syscall.c:4669
__do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb9e2368ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb9e0ee20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fb9e249ff80 RCX: 00007fb9e2368ea9
RDX: 0000000000000010 RSI: 0000000020000740 RDI: 000000000000000a
RBP: 00007fb9e23d7ff4 R
---
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