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KMSAN: uninit-value in kcov_remote_start (2)

Status: auto-closed as invalid on 2020/02/09 23:37
Subsystems: net virt kvm
[Documentation on labels]
First crash: 2133d, last: 2132d
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in kcov_remote_start usb 7 116267 2207d 2357d 0/29 closed as invalid on 2019/09/30 09:38

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in __list_del_entry_valid+0x194/0x410 lib/list_debug.c:45
CPU: 0 PID: 13146 Comm: vhost-13144 Not tainted 5.5.0-rc1-syzkaller #0
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+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x57/0xa0 mm/kmsan/kmsan_instr.c:245
 __list_del_entry_valid+0x194/0x410 lib/list_debug.c:45
 __list_del_entry include/linux/list.h:131 [inline]
 list_del include/linux/list.h:139 [inline]
 kcov_remote_area_get kernel/kcov.c:126 [inline]
 kcov_remote_start+0x13e/0x2e0 kernel/kcov.c:799
 kcov_remote_start_common include/linux/kcov.h:47 [inline]
 vhost_worker+0x373/0x690 drivers/vhost/vhost.c:361
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353

Uninit was created at:
 kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:149
 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:357 [inline]
 kmsan_alloc_page+0x133/0x320 mm/kmsan/kmsan_shadow.c:386
 __alloc_pages_nodemask+0x1421/0x5fd0 mm/page_alloc.c:4799
 alloc_pages_current+0x68d/0x9a0 mm/mempolicy.c:2207
 alloc_pages include/linux/gfp.h:534 [inline]
 __vmalloc_area_node mm/vmalloc.c:2503 [inline]
 __vmalloc_node_range+0x8c9/0x1270 mm/vmalloc.c:2567
 __vmalloc_node mm/vmalloc.c:2627 [inline]
 __vmalloc_node_flags mm/vmalloc.c:2641 [inline]
 vmalloc+0x106/0x120 mm/vmalloc.c:2666
 kcov_remote_start+0x18e/0x2e0 kernel/kcov.c:803
 kcov_remote_start_common include/linux/kcov.h:47 [inline]
 vhost_worker+0x373/0x690 drivers/vhost/vhost.c:361
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353
=====================================================

Crashes (1216):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/12/11 23:00 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 22:55 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 21:55 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 20:54 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 20:35 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 18:43 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 17:38 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 17:05 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 16:34 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 15:55 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 14:49 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 13:42 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 13:23 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 13:06 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 12:47 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 12:32 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 12:14 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 11:59 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 11:40 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 11:19 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 11:02 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 10:44 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 10:25 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 10:07 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 09:53 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 09:35 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 09:19 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 09:04 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 08:44 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 08:29 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 08:13 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 07:55 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 07:38 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 07:22 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 07:05 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 06:50 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 06:34 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 06:19 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 06:04 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 05:49 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/11 05:34 https://github.com/google/kmsan.git master 5ef742bab7b8 101194eb .config console log report ci-upstream-kmsan-gce
2019/12/10 22:41 https://github.com/google/kmsan.git master 5ef742bab7b8 5a5826a1 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.