syzbot

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Please remove unsupported %� in format string
WARNING: CPU: 0 PID: 5840 at lib/vsprintf.c:2724 format_decode+0xac6/0xd40 lib/vsprintf.c:2724
Modules linked in:
CPU: 0 UID: 0 PID: 5840 Comm: syz-executor108 Not tainted 6.15.0-syzkaller-11173-g546b1c9e93c2 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:format_decode+0xac6/0xd40 lib/vsprintf.c:2724
Code: ea 03 0f b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 c2 01 00 00 41 0f b6 75 00 48 c7 c7 20 fc f2 8c e8 7b 64 03 f6 90 <0f> 0b 90 90 e9 d8 fa ff ff 49 bc 00 00 00 00 00 fc ff df 31 db e8
RSP: 0018:ffffc90003bdf6b8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817ad368
RDX: ffff888034e59e00 RSI: ffffffff817ad375 RDI: 0000000000000001
RBP: ffffc90003bdf758 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000004
R13: ffffc90003bdf95c R14: ffffc90003bdf7e8 R15: 0000000000000000
FS:  000055558fa08380(0000) GS:ffff88812496c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4105c350d0 CR3: 0000000074820000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bstr_printf+0x168/0x10a0 lib/vsprintf.c:3249
 ____bpf_trace_printk kernel/trace/bpf_trace.c:378 [inline]
 bpf_trace_printk+0x10a/0x190 kernel/trace/bpf_trace.c:363
 bpf_prog_21da1b68f62e1237+0x37/0x42
 bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline]
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run include/linux/filter.h:725 [inline]
 bpf_test_run+0x48c/0xa70 net/bpf/test_run.c:434
 bpf_prog_test_run_skb+0xb92/0x2280 net/bpf/test_run.c:1099
 bpf_prog_test_run kernel/bpf/syscall.c:4429 [inline]
 __sys_bpf+0x1488/0x4d80 kernel/bpf/syscall.c:5854
 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5941 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5941
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4105bbebb9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffb1c27e48 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 64006ad576d86aa0 RCX: 00007f4105bbebb9
RDX: 0000000000000028 RSI: 0000200000000080 RDI: 000000000000000a
RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>