syzbot


WARNING in drm_syncobj_array_find

Status: upstream: reported C repro on 2023/09/06 11:42
Subsystems: dri
[Documentation on labels]
Reported-by: syzbot+95416f957d84e858b377@syzkaller.appspotmail.com
First crash: 876d, last: 7h30m
Discussions (27)
Title Replies (including bot) Last reply
[PATCH] drm/syncobj: Validate count_handles to prevent large allocations in array_find() 1 (1) 2025/12/27 16:08
[PATCH RESEND] drm/syncobj: Validate count_handles to prevent large allocations in array_find() 1 (1) 2025/12/06 22:00
[PATCH] drm/syncobj: Validate count_handles to prevent large allocations in array_find() 1 (1) 2025/11/27 17:35
[PATCH] drm/syncobj: Prevent overflow and large kmalloc in array_find() 1 (2) 2025/11/27 13:22
[syzbot] Monthly dri report (Nov 2025) 0 (1) 2025/11/27 07:44
[syzbot] Monthly dri report (Oct 2025) 0 (1) 2025/10/27 08:42
[syzbot] Monthly dri report (Sep 2025) 0 (1) 2025/09/25 16:00
[syzbot] Monthly dri report (Aug 2025) 0 (1) 2025/08/25 13:19
[syzbot] Monthly dri report (Jul 2025) 0 (1) 2025/07/25 12:39
[syzbot] Monthly dri report (Jun 2025) 0 (1) 2025/06/24 07:38
[syzbot] Monthly dri report (Jan 2025) 0 (1) 2025/01/15 13:48
[syzbot] Monthly dri report (Dec 2024) 0 (1) 2024/12/16 09:44
[syzbot] Monthly dri report (Nov 2024) 0 (1) 2024/11/14 08:59
[syzbot] Monthly dri report (Oct 2024) 0 (1) 2024/10/13 19:21
[syzbot] Monthly dri report (Sep 2024) 0 (1) 2024/09/12 14:24
[syzbot] Monthly dri report (Aug 2024) 0 (1) 2024/08/13 08:54
[syzbot] Monthly dri report (Jul 2024) 0 (1) 2024/07/12 10:05
[syzbot] Monthly dri report (Jun 2024) 0 (1) 2024/06/10 12:41
[syzbot] Monthly dri report (May 2024) 0 (1) 2024/05/06 13:18
[syzbot] Monthly dri report (Apr 2024) 0 (1) 2024/04/05 12:37
[syzbot] Monthly dri report (Mar 2024) 0 (1) 2024/03/05 11:09
[syzbot] Monthly dri report (Feb 2024) 0 (1) 2024/02/02 21:05
[syzbot] Monthly dri report (Jan 2024) 0 (1) 2024/01/02 13:36
[syzbot] Monthly dri report (Nov 2023) 0 (1) 2023/11/30 20:33
[syzbot] Monthly dri report (Oct 2023) 0 (1) 2023/10/30 12:59
[syzbot] Monthly dri report (Sep 2023) 0 (1) 2023/09/28 11:42
[syzbot] [dri?] WARNING in drm_syncobj_array_find 0 (1) 2023/09/06 11:42
Last patch testing requests (11)
Created Duration User Patch Repo Result
2025/11/27 13:05 16m madhurkumar004@gmail.com patch upstream OK log
2025/04/21 15:20 24m retest repro upstream report log
2025/04/21 15:20 12m retest repro upstream report log
2025/04/21 15:20 12m retest repro upstream report log
2025/04/21 15:20 11m retest repro upstream report log
2025/04/21 12:54 27m retest repro upstream report log
2025/04/21 12:54 26m retest repro upstream report log
2025/04/21 12:54 26m retest repro upstream report log
2025/04/21 12:54 24m retest repro upstream report log
2025/02/10 13:09 15m retest repro upstream report log
2025/02/10 13:09 15m retest repro upstream report log

Sample crash report:
WARNING: mm/page_alloc.c:5186 at __alloc_frozen_pages_noprof+0x309/0x2430 mm/page_alloc.c:5186, CPU#1: syz.0.17/6098
Modules linked in:
CPU: 1 UID: 0 PID: 6098 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__alloc_frozen_pages_noprof+0x309/0x2430 mm/page_alloc.c:5186
Code: f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 83 fe 0a 0f 86 0c fe ff ff 80 3d 39 53 56 0e 00 75 0b c6 05 30 53 56 0e 01 90 <0f> 0b 90 45 31 f6 eb 81 4d 85 f6 74 22 44 89 fa 89 ee 4c 89 f7 e8
RSP: 0018:ffffc90003f4f7a8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000015 RDI: 0000000000040cc0
RBP: 0000000000000015 R08: 0000000000000005 R09: 0000000000000009
R10: 0000000000000015 R11: ffff888025168b30 R12: 0000000000040cc0
R13: 1ffff920007e9f0b R14: ffffffff9ac42ac4 R15: 0000000000000015
FS:  0000555558bad500(0000) GS:ffff8880d69f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed63fff CR3: 00000000316cf000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
 ___kmalloc_large_node+0x10c/0x150 mm/slub.c:5598
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:5629
 __do_kmalloc_node mm/slub.c:5645 [inline]
 __kmalloc_noprof.cold+0xc/0x62 mm/slub.c:5669
 kmalloc_noprof include/linux/slab.h:961 [inline]
 kmalloc_array_noprof include/linux/slab.h:1003 [inline]
 drm_syncobj_array_find+0x35/0x3c0 drivers/gpu/drm/drm_syncobj.c:1297
 drm_syncobj_timeline_signal_ioctl+0x226/0x870 drivers/gpu/drm/drm_syncobj.c:1624
 drm_ioctl_kernel+0x1f4/0x3e0 drivers/gpu/drm/drm_ioctl.c:804
 drm_ioctl+0x5c9/0xc30 drivers/gpu/drm/drm_ioctl.c:901
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd9af8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffed7bc88d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcd9b1e5fa0 RCX: 00007fcd9af8f7c9
RDX: 00002000000002c0 RSI: 00000000c01864cd RDI: 0000000000000003
RBP: 00007fcd9b013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd9b1e5fa0 R14: 00007fcd9b1e5fa0 R15: 0000000000000003
 </TASK>

Crashes (3076):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/04 04:48 upstream aacb0a6d604a d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2025/09/25 21:33 upstream bf40f4b87761 0abd0691 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2024/12/10 14:37 upstream 7cb1b4663150 cfc402b4 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2024/12/01 05:06 upstream d8b78066f4c9 68914665 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2024/10/10 15:29 upstream d3d1556696c1 a156c552 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2024/07/15 19:58 upstream 0c3836482481 efee4ed2 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2024/04/04 20:33 upstream c85af715cac0 0ee3535e .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2024/03/26 03:40 upstream 928a87efa423 bcd9b39f .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2023/12/17 02:52 upstream c8e97fc6b4c0 3222d10c .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2023/09/02 12:16 upstream 0468be89b3fa 696ea0d2 .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/25 15:50 upstream d91a46d6805a 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/25 10:56 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/25 08:31 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/25 05:19 upstream 5dbeeb268b63 40acda8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/25 03:41 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/24 21:54 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/24 16:29 upstream 62085877ae65 40acda8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/24 06:48 upstream c133687c2eae 4f25b9b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/24 04:10 upstream 3a622041d78b 4f25b9b4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/23 17:15 upstream c072629f05d7 1aa92270 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/23 15:19 upstream c072629f05d7 1aa92270 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/23 06:20 upstream c072629f05d7 82c9c083 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/23 03:37 upstream a66191c590b3 82c9c083 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/22 12:39 upstream a66191c590b3 a16aed1d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/22 04:25 upstream cf38b2340c0e d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/22 01:20 upstream cf38b2340c0e 8fc37797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/21 22:16 upstream 6c790212c588 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/21 17:34 upstream 6c790212c588 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/21 14:34 upstream 6c790212c588 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/21 11:50 upstream 6c790212c588 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/21 04:11 upstream c03e9c42ae8f 2494e18d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/21 00:43 upstream c03e9c42ae8f 2494e18d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/20 22:26 upstream c03e9c42ae8f d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/20 17:02 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/20 17:02 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/20 10:51 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/20 05:14 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/20 03:42 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/20 02:41 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/20 01:09 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/19 23:56 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/19 22:40 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/19 19:15 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/19 15:33 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/19 10:17 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/19 08:53 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/19 07:41 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/19 05:27 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/18 23:15 upstream e84d960149e7 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/18 20:17 upstream e84d960149e7 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/18 18:09 upstream e84d960149e7 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/18 15:02 upstream d12453c7e281 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/18 12:43 upstream d12453c7e281 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/18 00:56 upstream d3eeb99bbc99 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/17 18:19 upstream d3eeb99bbc99 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/17 08:28 upstream b62ce2547fe8 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/17 05:59 upstream b62ce2547fe8 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/17 04:42 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/16 23:19 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in drm_syncobj_array_find
2026/01/16 08:47 upstream 603c05a1639f d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/16 06:59 upstream 603c05a1639f d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/16 02:19 upstream 603c05a1639f d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
2026/01/15 12:16 upstream 944aacb68baf d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drm_syncobj_array_find
* Struck through repros no longer work on HEAD.