syzbot


WARNING in c_start (2)

Status: fixed on 2023/06/08 14:41
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+96cae094d90877641f32@syzkaller.appspotmail.com
Fix commit: e7304080e0e5 cpumask: relax sanity checking constraints
First crash: 201d, last: 180d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [kernel?] WARNING in c_start (2) 3 (4) 2023/03/12 09:50
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in c_start kernel 75097 341d 343d 24/25 fixed on 2023/02/24 13:51

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5075 at include/linux/cpumask.h:143 cpu_max_bits_warn include/linux/cpumask.h:143 [inline]
WARNING: CPU: 0 PID: 5075 at include/linux/cpumask.h:143 cpumask_check include/linux/cpumask.h:150 [inline]
WARNING: CPU: 0 PID: 5075 at include/linux/cpumask.h:143 cpumask_next include/linux/cpumask.h:212 [inline]
WARNING: CPU: 0 PID: 5075 at include/linux/cpumask.h:143 c_start+0x1da/0x250 arch/x86/kernel/cpu/proc.c:156
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-fuzzer Not tainted 6.3.0-rc1-syzkaller-00242-g81ff855485a3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:143 [inline]
RIP: 0010:cpumask_check include/linux/cpumask.h:150 [inline]
RIP: 0010:cpumask_next include/linux/cpumask.h:212 [inline]
RIP: 0010:c_start+0x1da/0x250 arch/x86/kernel/cpu/proc.c:156
Code: 99 11 8c e8 b8 88 52 00 4c 89 e0 5b 5d 41 5c 41 5d 41 5e c3 f3 48 0f bc db e8 a2 88 52 00 89 db e9 38 ff ff ff e8 96 88 52 00 <0f> 0b e9 c1 fe ff ff 48 c7 c7 c0 45 78 8e e8 03 15 a4 00 e9 67 ff
RSP: 0018:ffffc90003edfc68 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000000000
RDX: ffff888018fd0000 RSI: ffffffff813279da RDI: 0000000000000004
RBP: ffffffff8e7845c0 R08: 0000000000000004 R09: 0000000000000007
R10: 0000000000000002 R11: 0000000000000000 R12: ffff88802abb5718
R13: 0000000000000008 R14: 0000000000000002 R15: 0000000000000000
FS:  000000c0001d1c90(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00022fff8 CR3: 0000000022330000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 seq_read_iter+0x2ca/0x12d0 fs/seq_file.c:225
 proc_reg_read_iter+0x115/0x2d0 fs/proc/inode.c:301
 call_read_iter include/linux/fs.h:1845 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x681/0x930 fs/read_write.c:470
 ksys_read+0x12b/0x250 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x403ace
Code: 48 89 6c 24 38 48 8d 6c 24 38 e8 0d 00 00 00 48 8b 6c 24 38 48 83 c4 40 c3 cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48
RSP: 002b:000000c0004e5308 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000403ace
RDX: 0000000000001000 RSI: 000000c00041a000 RDI: 0000000000000003
RBP: 000000c0004e5348 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000c0004e5488
R13: 0000000000000000 R14: 000000c0000061a0 R15: 1000000000000000
 </TASK>

Crashes (616173):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/03/12 17:20 upstream 81ff855485a3 5205ef30 .config console log report ci-upstream-kasan-gce-root WARNING in c_start
2023/03/12 17:07 upstream 81ff855485a3 5205ef30 .config console log report ci-upstream-kasan-gce-selinux-root WARNING in c_start
2023/03/12 16:54 upstream 81ff855485a3 5205ef30 .config console log report ci-upstream-kasan-gce-smack-root WARNING in c_start
2023/03/12 16:46 upstream 81ff855485a3 5205ef30 .config console log report ci2-upstream-fs WARNING in c_start
2023/03/12 16:37 upstream 81ff855485a3 5205ef30 .config console log report ci-upstream-kasan-gce WARNING in c_start
2023/03/12 16:36 upstream 81ff855485a3 5205ef30 .config console log report info ci-qemu-upstream WARNING in c_start
2023/03/10 00:41 upstream 44889ba56cbb f08b59ac .config console log report info ci-qemu-upstream WARNING in c_start
2023/03/12 17:39 upstream 81ff855485a3 5205ef30 .config console log report ci-upstream-kasan-gce-386 WARNING in c_start
2023/03/12 17:10 upstream 81ff855485a3 5205ef30 .config console log report info ci-qemu-upstream-386 WARNING in c_start
2023/03/06 00:36 upstream fe15c26ee26e f8902b57 .config console log report info ci-qemu-upstream-386 WARNING in c_start
2023/03/06 00:36 upstream fe15c26ee26e f8902b57 .config console log report info ci-qemu-upstream-386 WARNING in c_start
2023/03/24 07:26 bpf 915efd8a446b f94b4a29 .config console log report ci-upstream-bpf-kasan-gce WARNING in c_start
2023/03/18 09:46 net f5e305e63b03 7939252e .config console log report ci-upstream-net-this-kasan-gce WARNING in c_start
2023/03/18 09:39 net-next 79a22238b4f2 7939252e .config console log report ci-upstream-net-kasan-gce WARNING in c_start
2023/03/27 07:47 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:43 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:39 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:36 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:32 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:28 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:24 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:20 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:16 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:12 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:08 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:04 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 07:01 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:57 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:53 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:49 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:45 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:41 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:38 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:34 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:30 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:26 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:22 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:18 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:14 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:11 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:07 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 06:03 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:59 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:55 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:52 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:48 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:44 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:40 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:36 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:32 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:28 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:25 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:21 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:17 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:13 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/27 05:09 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b947f8769be fbf0499a .config console log report ci2-upstream-usb WARNING in c_start
2023/03/16 02:21 linux-next 24469a0e5052 18b58603 .config console log report ci-upstream-linux-next-kasan-gce-root WARNING in c_start
* Struck through repros no longer work on HEAD.