syzbot


WARNING in format_decode

Status: auto-closed as invalid on 2019/04/28 09:31
Reported-by: syzbot+68bb74cd0b7caeeaf86f@syzkaller.appspotmail.com
First crash: 2102d, last: 2102d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in format_decode reiserfs C 1 2307d 2307d 5/27 fixed on 2018/05/08 18:30
linux-5.15 WARNING in format_decode origin:upstream C 118 4d16h 250d 0/3 upstream: reported C repro on 2023/11/17 23:37
upstream WARNING in format_decode (3) bpf trace C done 984 2d19h 246d 0/27 upstream: reported C repro on 2023/11/21 22:43
upstream WARNING in format_decode (2) trace C 16 2077d 2159d 11/27 fixed on 2018/12/07 08:24
linux-6.1 WARNING in format_decode origin:upstream C 139 17d 250d 0/3 upstream: reported C repro on 2023/11/17 22:49

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4713 at lib/vsprintf.c:1897 format_decode+0x7bb/0x9e0 lib/vsprintf.c:1897
Please remove unsupported %� in format string
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4713 Comm: syz-executor0 Not tainted 4.9.135+ #110
 ffff8801ce997358 ffffffff81b36bf9 ffffffff82a38ba0 00000000ffffffff
 0000000000000000 0000000000000001 0000000000000769 ffff8801ce997418
 ffffffff813f6aa5 0000000041b58ab3 ffffffff82e29bcb ffffffff813f68e6
Call Trace:
 [<ffffffff81b36bf9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b36bf9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f6aa5>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f6d74>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff810dbcc2>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff81b5751b>] format_decode+0x7bb/0x9e0 lib/vsprintf.c:1897
 [<ffffffff81b60aa3>] vsnprintf+0x163/0x1840 lib/vsprintf.c:1993
 [<ffffffff815822a3>] seq_vprintf+0xe3/0x1a0 fs/seq_file.c:403
 [<ffffffff8158240b>] seq_printf+0xab/0xe0 fs/seq_file.c:418
 [<ffffffff82723417>] get_tcp6_sock net/ipv6/tcp_ipv6.c:1787 [inline]
 [<ffffffff82723417>] tcp6_seq_show+0xdf7/0x1ad0 net/ipv6/tcp_ipv6.c:1861
 [<ffffffff81581135>] seq_read+0xa75/0x12d0 fs/seq_file.c:275
 [<ffffffff8165bf9d>] proc_reg_read+0xfd/0x180 fs/proc/inode.c:203
 [<ffffffff81509de5>] do_loop_readv_writev.part.1+0xd5/0x280 fs/read_write.c:718
 [<ffffffff8150b48e>] do_loop_readv_writev fs/read_write.c:707 [inline]
 [<ffffffff8150b48e>] do_readv_writev+0x56e/0x7b0 fs/read_write.c:873
 [<ffffffff8150b754>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff8150bb87>] do_preadv+0x197/0x240 fs/read_write.c:974
 [<ffffffff8150f140>] SYSC_preadv fs/read_write.c:1024 [inline]
 [<ffffffff8150f140>] SyS_preadv+0x30/0x40 fs/read_write.c:1019
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82803413>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/10/23 15:24 https://android.googlesource.com/kernel/common android-4.9 826f32857c23 24fa2ad8 .config console log report ci-android-49-kasan-gce
* Struck through repros no longer work on HEAD.