------------[ cut here ]------------ Please remove unsupported % in format string WARNING: CPU: 1 PID: 11224 at lib/vsprintf.c:2152 format_decode+0x8fc/0xaf0 lib/vsprintf.c:2152 Kernel panic - not syncing: panic_on_warn set ... kobject: 'loop5' (00000000435d2e92): kobject_uevent_env CPU: 1 PID: 11224 Comm: syz-executor1 Not tainted 4.20.0-rc1+ #80 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 __warn.cold.8+0x20/0x45 kernel/panic.c:540 kobject: 'loop5' (00000000435d2e92): fill_kobj_path: path = '/devices/virtual/block/loop5' report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:format_decode+0x8fc/0xaf0 lib/vsprintf.c:2152 Code: e8 c9 37 b5 f9 41 c6 45 00 12 e9 9b fd ff ff e8 ba 37 b5 f9 0f be f3 48 c7 c7 c0 f1 d5 88 c6 05 d2 08 47 02 01 e8 74 99 7e f9 <0f> 0b 4d 8b 66 c0 e9 59 fe ff ff 48 8b bd 70 ff ff ff e8 6d 84 f8 RSP: 0018:ffff88019551f670 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000456d000 RDX: 000000000000d3d5 RSI: ffffffff8165e9b5 RDI: 0000000000000005 RBP: ffff88019551f718 R08: ffff8801a1324140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88019551faec R13: ffff88019551f790 R14: ffff88019551f6f0 R15: 0000000000000000 vsnprintf+0x185/0x1b60 lib/vsprintf.c:2248 vscnprintf+0x2d/0x80 lib/vsprintf.c:2399 __trace_array_vprintk.part.59+0x5b/0x2f0 kernel/trace/trace.c:2992 __trace_array_vprintk kernel/trace/trace.c:3023 [inline] trace_array_vprintk kernel/trace/trace.c:3023 [inline] trace_vprintk+0x71/0x90 kernel/trace/trace.c:3061 __trace_printk+0xce/0x120 kernel/trace/trace_printk.c:238 ____bpf_trace_printk kernel/trace/bpf_trace.c:271 [inline] bpf_trace_printk+0xb30/0xc50 kernel/trace/bpf_trace.c:163 bpf_prog_12183cdb1cd51dab+0xc2/0x1000 Kernel Offset: disabled Rebooting in 86400 seconds..