Hello,
syzbot found the following issue on:
HEAD commit: fb2635ac69ab Linux 6.1.62
git tree: linux-6.1.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=152ddc9f680000
kernel config:
https://syzkaller.appspot.com/x/.config?x=d1540e3da5e5623f
dashboard link:
https://syzkaller.appspot.com/bug?extid=e2e0d959be60c6d0dc32
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/c564654b9f0a/disk-fb2635ac.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/7967ffa53eb1/vmlinux-fb2635ac.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/2ddd941684d4/bzImage-fb2635ac.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+e2e0d9...@syzkaller.appspotmail.com
------------[ cut here ]------------
Please remove unsupported % in format string
WARNING: CPU: 1 PID: 28318 at lib/vsprintf.c:2656 format_decode+0x12d2/0x1f10 lib/vsprintf.c:2656
Modules linked in:
CPU: 1 PID: 28318 Comm: syz-executor.0 Not tainted 6.1.62-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:format_decode+0x12d2/0x1f10 lib/vsprintf.c:2656
Code: db 03 01 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 30 0c 00 00 41 0f be 36 48 c7 c7 a0 5c 07 8c e8 fe 15 cf f6 <0f> 0b e9 01 fa ff ff 48 8b 4c 24 18 80 e1 07 38 c1 0f 8c e3 ed ff
RSP: 0018:ffffc900068f76a0 EFLAGS: 00010046
RAX: e619ff718da5bd00 RBX: 00000000ffffffdb RCX: 0000000000040000
RDX: ffffc90003ba1000 RSI: 00000000000043f2 RDI: 00000000000043f3
RBP: ffffc900068f7790 R08: ffffffff81527dae R09: ffffed1017324f1c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff0a00ffffff00
R13: ffff0000ffffff00 R14: ffffc900068f79ac R15: 1ffff92000d1ef35
FS: 00007fecf5fe06c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32c21000 CR3: 000000004981f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
bstr_printf+0x130/0x10c0 lib/vsprintf.c:3229
____bpf_trace_printk kernel/trace/bpf_trace.c:391 [inline]
bpf_trace_printk+0x186/0x200 kernel/trace/bpf_trace.c:376
bpf_prog_12183cdb1cd51dab+0x2e/0x32
bpf_dispatcher_nop_func include/linux/bpf.h:970 [inline]
__bpf_prog_run include/linux/filter.h:600 [inline]
bpf_prog_run include/linux/filter.h:607 [inline]
bpf_test_run+0x40f/0x8b0 net/bpf/test_run.c:402
bpf_prog_test_run_skb+0xaf1/0x13a0 net/bpf/test_run.c:1180
bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3633
__sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:4986
__do_sys_bpf kernel/bpf/syscall.c:5072 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5070 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5070
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fecf527cae9
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:00007fecf5fe00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fecf539bf80 RCX: 00007fecf527cae9
RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007fecf52c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fecf539bf80 R15: 00007ffc9df340b8
</TASK>
---
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