------------[ cut here ]------------ Please remove unsupported % in format string WARNING: CPU: 2 PID: 6471 at lib/vsprintf.c:2704 format_decode+0xa07/0xba0 lib/vsprintf.c:2704 Modules linked in: CPU: 2 UID: 0 PID: 6471 Comm: syz.0.86 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:format_decode+0xa07/0xba0 lib/vsprintf.c:2704 Code: f6 41 c6 44 24 05 08 e9 c4 fa ff ff e8 22 ee 82 f6 c6 05 66 2d ef 04 01 90 48 c7 c7 e0 49 ab 8c 40 0f b6 f5 e8 4a c5 43 f6 90 <0f> 0b 90 90 e9 17 fc ff ff 48 8b 3c 24 e8 37 74 e5 f6 e9 0f f7 ff RSP: 0018:ffffc9000db376d0 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffc9000db37944 RCX: ffffc9000caf2000 RDX: 0000000000080000 RSI: ffffffff815a16d6 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000db377d0 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000ffffffd0 FS: 0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f5076b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020001400 CR3: 000000006b030000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bstr_printf+0x139/0x1060 lib/vsprintf.c:3277 ____bpf_trace_printk kernel/trace/bpf_trace.c:389 [inline] bpf_trace_printk+0x10b/0x190 kernel/trace/bpf_trace.c:374 bpf_prog_12183cdb1cd51dab+0x37/0x3b bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] bpf_test_run+0x49d/0xa90 net/bpf/test_run.c:434 bpf_prog_test_run_skb+0xbaa/0x22c0 net/bpf/test_run.c:1095 bpf_prog_test_run kernel/bpf/syscall.c:4402 [inline] __sys_bpf+0x1921/0x57a0 kernel/bpf/syscall.c:5808 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline] __se_sys_bpf kernel/bpf/syscall.c:5895 [inline] __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5895 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f00579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f507657c EFLAGS: 00000292 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 000000000000000a RCX: 0000000020000080 RDX: 0000000000000028 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi