syzbot


WARNING in format_decode

Status: upstream: reported C repro on 2023/11/17 22:49
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+e2e0d959be60c6d0dc32@syzkaller.appspotmail.com
First crash: 208d, last: 2d11h
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 2265d 2265d 5/28 fixed on 2018/05/08 18:30
linux-5.15 WARNING in format_decode origin:upstream C 105 2d13h 208d 0/3 upstream: reported C repro on 2023/11/17 23:37
android-49 WARNING in format_decode 1 2059d 1887d 0/3 auto-closed as invalid on 2019/04/28 09:31
upstream WARNING in format_decode (3) bpf trace C done 880 1d07h 204d 0/28 upstream: reported C repro on 2023/11/21 22:43
upstream WARNING in format_decode (2) trace C 16 2034d 2116d 11/28 fixed on 2018/12/07 08:24

Sample crash report:
------------[ cut here ]------------
Please remove unsupported %� in format string
WARNING: CPU: 0 PID: 3551 at lib/vsprintf.c:2661 format_decode+0x12d2/0x1f10 lib/vsprintf.c:2661
Modules linked in:
CPU: 0 PID: 3551 Comm: syz-executor266 Not tainted 6.1.90-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:format_decode+0x12d2/0x1f10 lib/vsprintf.c:2661
Code: da 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 00 d1 07 8c e8 fe 66 cd 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:ffffc90003bdf680 EFLAGS: 00010246
RAX: 99d9315c1a158e00 RBX: 00000000ffffffdb RCX: ffff88802694bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003bdf770 R08: ffffffff81528ede R09: ffffed1017304f1c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff0a00ffffff00
R13: ffff0000ffffff00 R14: ffffc90003bdf9ac R15: 1ffff9200077bf35
FS:  000055555711e380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 0000000076cc1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bstr_printf+0x130/0x10c0 lib/vsprintf.c:3234
 ____bpf_trace_printk kernel/trace/bpf_trace.c:389 [inline]
 bpf_trace_printk+0x19d/0x220 kernel/trace/bpf_trace.c:374
 bpf_prog_12183cdb1cd51dab+0x2e/0x32
 bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline]
 __bpf_prog_run include/linux/filter.h:603 [inline]
 bpf_prog_run include/linux/filter.h:610 [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:3670
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5023
 __do_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5107 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5107
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f96431fd4e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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:00007ffc7fe512e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffc7fe514b8 RCX: 00007f96431fd4e9
RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007f9643270610 R08: 0000000000000000 R09: 00007ffc7fe514b8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc7fe514a8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (130):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/09 03:03 linux-6.1.y 909ba1f1b414 20bf80e1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/02/24 17:35 linux-6.1.y 81e1dc2f7001 8d446f15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/02/24 03:36 linux-6.1.y 81e1dc2f7001 8d446f15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/02/18 00:11 linux-6.1.y 8b4118fabd6e 578f7538 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/02/15 22:21 linux-6.1.y f1bb70486c9c fd39cf6f .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/02/10 10:51 linux-6.1.y f1bb70486c9c 77b23aa1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/02/08 05:52 linux-6.1.y f1bb70486c9c 6404acf9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/01/26 16:43 linux-6.1.y 883d1a956208 cc4a4020 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/01/16 15:40 linux-6.1.y fec3b1451d5f 2a7bcc7f .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/01/12 07:42 linux-6.1.y 7c58bfa711cb dda5a988 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/01/04 21:33 linux-6.1.y a507f147e6f0 28c42cff .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/01/04 20:24 linux-6.1.y a507f147e6f0 28c42cff .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/12/30 22:45 linux-6.1.y 4aa6747d9352 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/12/06 01:50 linux-6.1.y c6114c845984 858d62d1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/18 03:35 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/18 03:03 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/18 02:32 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/18 02:01 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/18 01:31 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/18 01:00 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/18 00:28 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/17 23:58 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/17 23:16 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/06/11 01:08 linux-6.1.y 88690811da69 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/06/10 23:55 linux-6.1.y 88690811da69 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/06/10 19:56 linux-6.1.y 88690811da69 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/06/08 14:23 linux-6.1.y 88690811da69 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/06/07 02:54 linux-6.1.y 88690811da69 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/06/06 14:40 linux-6.1.y 88690811da69 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/06/06 14:40 linux-6.1.y 88690811da69 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/06/06 12:02 linux-6.1.y 88690811da69 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/06/05 22:24 linux-6.1.y 88690811da69 5aa1a7c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/06/04 08:57 linux-6.1.y 88690811da69 a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/06/04 07:24 linux-6.1.y 88690811da69 a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/31 01:48 linux-6.1.y 88690811da69 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/28 10:02 linux-6.1.y 88690811da69 f550015e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/25 01:57 linux-6.1.y 4078fa637fcd a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/24 11:44 linux-6.1.y 4078fa637fcd 8f98448e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/24 11:33 linux-6.1.y 4078fa637fcd 8f98448e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/23 19:19 linux-6.1.y 4078fa637fcd 4c2072ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/21 00:10 linux-6.1.y 4078fa637fcd c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/17 20:08 linux-6.1.y 4078fa637fcd a12e99e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/11 16:58 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/11 05:39 linux-6.1.y 909ba1f1b414 f7c35481 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/11 04:12 linux-6.1.y 909ba1f1b414 f7c35481 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/10 09:09 linux-6.1.y 909ba1f1b414 de979bc2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/03 17:42 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/03 06:55 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/03 03:09 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/05/02 02:35 linux-6.1.y dcbc050cb0d3 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/30 20:24 linux-6.1.y dcbc050cb0d3 3ce4924c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2024/04/30 18:24 linux-6.1.y dcbc050cb0d3 3ce4924c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/29 03:48 linux-6.1.y f2295faba5e8 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/29 00:16 linux-6.1.y f2295faba5e8 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/24 10:41 linux-6.1.y 6741e066ec76 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/23 03:53 linux-6.1.y 6741e066ec76 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/22 16:33 linux-6.1.y 6741e066ec76 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/21 23:54 linux-6.1.y 6741e066ec76 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/21 10:37 linux-6.1.y 6741e066ec76 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/16 01:42 linux-6.1.y cd5d98c0556c b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/15 19:26 linux-6.1.y cd5d98c0556c b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/15 17:52 linux-6.1.y cd5d98c0556c b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/12 22:31 linux-6.1.y bf1e3b1cb1e0 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/11 19:13 linux-6.1.y bf1e3b1cb1e0 95ed9ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/11 07:24 linux-6.1.y bf1e3b1cb1e0 33b9e058 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/04/10 20:09 linux-6.1.y bf1e3b1cb1e0 4320ec32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/03/30 20:19 linux-6.1.y e5cd595e23c1 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/03/30 17:09 linux-6.1.y e5cd595e23c1 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/03/30 05:48 linux-6.1.y e5cd595e23c1 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/03/26 10:47 linux-6.1.y d7543167affd bcd9b39f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in format_decode
2024/03/16 16:42 linux-6.1.y d7543167affd d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
2023/11/17 22:48 linux-6.1.y fb2635ac69ab cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in format_decode
* Struck through repros no longer work on HEAD.