syzbot


WARNING in format_decode

Status: upstream: reported C repro on 2023/11/17 23:37
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+62370a20d9e4691f7b49@syzkaller.appspotmail.com
First crash: 544d, last: 9d15h
Bug presence (1)
Date Name Commit Repro Result
2023/11/18 upstream (ToT) 791c8ab095f7 C [report] WARNING in format_decode
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in format_decode reiserfs C 1 2601d 2601d 5/28 fixed on 2018/05/08 18:30
android-49 WARNING in format_decode 1 2395d 2223d 0/3 auto-closed as invalid on 2019/04/28 09:31
upstream WARNING in format_decode (3) trace bpf C done 1768 4d12h 540d 0/28 upstream: reported C repro on 2023/11/21 22:43
upstream WARNING in format_decode (2) trace C 16 2370d 2452d 11/28 fixed on 2018/12/07 08:24
linux-6.1 WARNING in format_decode origin:upstream C 248 9d15h 544d 0/3 upstream: reported C repro on 2023/11/17 22:49
Last patch testing requests (9)
Created Duration User Patch Repo Result
2025/04/12 00:32 8m retest repro linux-5.15.y report log
2025/04/12 00:32 12m retest repro linux-5.15.y report log
2025/04/12 00:32 8m retest repro linux-5.15.y report log
2025/04/12 00:32 9m retest repro linux-5.15.y report log
2025/04/12 00:32 12m retest repro linux-5.15.y report log
2025/03/18 10:06 11m retest repro linux-5.15.y report log
2025/03/18 10:06 1h32m retest repro linux-5.15.y report log
2025/03/18 10:06 1h27m retest repro linux-5.15.y report log
2025/03/18 10:06 21m retest repro linux-5.15.y report log

Sample crash report:
------------[ cut here ]------------
Please remove unsupported %� in format string
WARNING: CPU: 1 PID: 4163 at lib/vsprintf.c:2667 format_decode+0x12d2/0x1f10 lib/vsprintf.c:2667
Modules linked in:
CPU: 1 PID: 4163 Comm: syz-executor270 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:format_decode+0x12d2/0x1f10 lib/vsprintf.c:2667
Code: bd 09 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 80 19 fd 8a e8 be 20 13 fd <0f> 0b e9 01 fa ff ff 48 8b 4c 24 18 80 e1 07 38 c1 0f 8c e3 ed ff
RSP: 0018:ffffc900011df6c0 EFLAGS: 00010246
RAX: 26dbaa2627bf6900 RBX: 00000000ffffffdb RCX: ffff888025c89dc0
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffffc900011df7b0 R08: ffffffff8166aa8c R09: ffffed10171e4f24
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff0a00ffffff00
R13: ffff0000ffffff00 R14: ffffc900011df9ec R15: 1ffff9200023bf3d
FS:  000055557dfdc380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe0946f50d0 CR3: 0000000021c08000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bstr_printf+0x130/0x1160 lib/vsprintf.c:3238
 ____bpf_trace_printk kernel/trace/bpf_trace.c:381 [inline]
 bpf_trace_printk+0x1bc/0x410 kernel/trace/bpf_trace.c:366
 bpf_prog_12183cdb1cd51dab+0x2e/0x184
 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_test_run+0x3f4/0x8a0 net/bpf/test_run.c:119
 bpf_prog_test_run_skb+0xb41/0x1420 net/bpf/test_run.c:669
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3373
 __sys_bpf+0x3ac/0x670 kernel/bpf/syscall.c:4674
 __do_sys_bpf kernel/bpf/syscall.c:4760 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4758 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4758
 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: 0033:0x7fe09467ebb9
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:00007ffcb211c828 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 64006ad576d86aa0 RCX: 00007fe09467ebb9
RDX: 0000000000000028 RSI: 0000400000000080 RDI: 000000000000000a
RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (234):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/17 17:31 linux-5.15.y c16c81c81336 4121cf9d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/01/23 00:06 linux-5.15.y 4735586da88e a44b0418 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/01/22 23:36 linux-5.15.y 4735586da88e a44b0418 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/01/22 23:08 linux-5.15.y 4735586da88e a44b0418 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/01/22 22:29 linux-5.15.y 4735586da88e a44b0418 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/01/22 21:28 linux-5.15.y 4735586da88e a44b0418 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/12/18 14:08 linux-5.15.y 963e654022cc a0626d3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/09/07 05:24 linux-5.15.y 14e468424d3e 9750182a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/09/05 21:28 linux-5.15.y 14e468424d3e 464ac2ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/08/18 22:13 linux-5.15.y 7e89efd3ae1c dbc93b08 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/08/18 20:38 linux-5.15.y 7e89efd3ae1c dbc93b08 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/05/09 19:00 linux-5.15.y 284087d4f7d5 05079661 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/02/24 17:32 linux-5.15.y 458ce51d0356 8d446f15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/02/24 16:30 linux-5.15.y 458ce51d0356 8d446f15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/02/24 03:34 linux-5.15.y 458ce51d0356 8d446f15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/02/18 00:08 linux-5.15.y 6139f2a02fe0 578f7538 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/02/15 11:50 linux-5.15.y 6139f2a02fe0 d9b1cdd5 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/02/15 09:25 linux-5.15.y 6139f2a02fe0 d9b1cdd5 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/02/09 01:20 linux-5.15.y 6139f2a02fe0 7f07e9b0 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/01/26 16:38 linux-5.15.y 6139f2a02fe0 cc4a4020 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/01/26 14:36 linux-5.15.y 6139f2a02fe0 cc4a4020 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/01/16 15:38 linux-5.15.y ddcaf4999061 2a7bcc7f .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/01/12 06:55 linux-5.15.y 26c690eff0a5 dda5a988 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/01/04 21:36 linux-5.15.y d93fa2c78854 28c42cff .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/01/04 20:50 linux-5.15.y d93fa2c78854 28c42cff .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/12/30 22:42 linux-5.15.y d93fa2c78854 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/12/30 21:58 linux-5.15.y d93fa2c78854 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2023/12/06 06:00 linux-5.15.y 9b91d36ba301 858d62d1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 05:37 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 05:07 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 04:36 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 04:11 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 03:45 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 03:12 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 02:42 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 02:20 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 01:50 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2023/11/18 01:05 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/05/05 22:16 linux-5.15.y 16fdf2c7111b 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/05/04 05:02 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/05/01 04:22 linux-5.15.y f7347f400572 ce7952f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/04/27 02:13 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/04/26 03:50 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/04/25 22:17 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/04/18 03:56 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/04/18 00:07 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/04/17 17:36 linux-5.15.y f7347f400572 229db4cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/04/13 14:23 linux-5.15.y f7347f400572 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/04/13 09:21 linux-5.15.y f7347f400572 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/03/28 22:08 linux-5.15.y 0c935c049b5c 9a1a9e31 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/03/27 03:24 linux-5.15.y 0c935c049b5c 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/03/27 02:20 linux-5.15.y 0c935c049b5c 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/03/26 19:26 linux-5.15.y 0c935c049b5c 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/03/26 10:06 linux-5.15.y 0c935c049b5c 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/03/24 08:48 linux-5.15.y 0c935c049b5c 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/03/24 08:48 linux-5.15.y 0c935c049b5c 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/03/20 00:10 linux-5.15.y 0c935c049b5c e20d7b13 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/03/19 19:11 linux-5.15.y 0c935c049b5c e20d7b13 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/02/09 14:55 linux-5.15.y c16c81c81336 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/02/07 02:05 linux-5.15.y c16c81c81336 8002dd28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/02/06 20:54 linux-5.15.y c16c81c81336 8002dd28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2025/01/26 01:35 linux-5.15.y 003148680b79 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/01/04 22:18 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2025/01/04 22:17 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/12/19 13:47 linux-5.15.y 963e654022cc 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/12/19 07:57 linux-5.15.y 963e654022cc 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/12/19 03:39 linux-5.15.y 963e654022cc 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/12/18 13:38 linux-5.15.y 963e654022cc a0626d3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/12/11 19:47 linux-5.15.y 0a51d2d4527b ff949d25 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/12/10 22:21 linux-5.15.y 0a51d2d4527b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/10/21 02:11 linux-5.15.y 584a40a22cb9 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/10/20 09:38 linux-5.15.y 584a40a22cb9 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/10/20 09:37 linux-5.15.y 584a40a22cb9 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/10/15 02:03 linux-5.15.y 3a5928702e71 b01b6661 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/10/14 18:58 linux-5.15.y 3a5928702e71 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/10/11 16:20 linux-5.15.y 3a5928702e71 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/09/29 19:35 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/09/28 23:47 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/09/28 22:20 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/09/28 14:57 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in format_decode
2024/09/28 08:53 linux-5.15.y 3a5928702e71 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2024/09/25 01:14 linux-5.15.y 3a5928702e71 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
2023/11/17 23:36 linux-5.15.y 80529b4968a8 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in format_decode
* Struck through repros no longer work on HEAD.