syzbot


WARNING in drm_gem_object_handle_put_unlocked

Status: upstream: reported C repro on 2023/09/16 01:22
Subsystems: dri
[Documentation on labels]
Reported-by: syzbot+ef3256a360c02207a4cb@syzkaller.appspotmail.com
First crash: 213d, last: 5d02h
Cause bisection: failed (error log, bisect log)
  
Discussions (8)
Title Replies (including bot) Last reply
[syzbot] Monthly dri report (Mar 2024) 0 (1) 2024/03/05 11:09
[PATCH] drm/drm_gem.c: Fixed WARNING in drm_gem_object_handle_put_unlocked 1 (1) 2023/12/16 10:43
[PATCH] Tried removing the error 1 (1) 2023/11/19 06:55
Re: [syzbot] [PATCH] Tried removing the error 0 (1) 2023/11/19 05:11
Re: [syzbot] [PATCH] Tried removing the warning. 0 (1) 2023/11/17 07:41
[syzbot] [dri?] WARNING in drm_gem_object_handle_put_unlocked 0 (2) 2023/11/15 06:33
[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
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in drm_gem_object_handle_put_unlocked C error 2 591d 682d 0/1 upstream: reported C repro on 2022/05/30 13:12
linux-4.19 WARNING in drm_gem_object_handle_put_unlocked C error 1 681d 681d 0/1 upstream: reported C repro on 2022/06/01 02:19
Last patch testing requests (12)
Created Duration User Patch Repo Result
2024/04/07 09:23 17m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2024/02/27 09:05 17m retest repro upstream report log
2024/02/13 04:40 27m retest repro upstream report log
2024/01/17 01:56 18m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/12/19 08:38 13m retest repro upstream report log
2023/12/05 03:24 18m retest repro upstream report log
2023/11/19 05:11 32m tintinm2017@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log
2023/11/17 07:41 22m tintinm2017@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log
2023/11/15 06:33 26m mukattreyee@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/11/08 00:00 20m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/10/10 04:46 14m retest repro upstream report log
2023/09/26 02:32 14m retest repro upstream report log

Sample crash report:
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fda971e917c
R13: 00007fda97153210 R14: 0023647261632f69 R15: 6972642f7665642f
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5043 at drivers/gpu/drm/drm_gem.c:225 drm_gem_object_handle_put_unlocked+0x299/0x390 drivers/gpu/drm/drm_gem.c:225
Modules linked in:
CPU: 1 PID: 5043 Comm: syz-executor141 Not tainted 6.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:drm_gem_object_handle_put_unlocked+0x299/0x390 drivers/gpu/drm/drm_gem.c:225
Code: ea 03 0f b6 04 02 84 c0 74 0c 3c 03 7f 08 4c 89 f7 e8 2b 06 2a fd c7 83 20 01 00 00 00 00 00 00 e9 98 fe ff ff e8 57 44 d4 fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e e9 48 44 d4 fc e8 43 44 d4 fc 48 8d
RSP: 0018:ffffc90003d5fbb8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888027b61000 RCX: 0000000000000000
RDX: ffff888014fcbb80 RSI: ffffffff84b38a29 RDI: 0000000000000005
RBP: ffff888027b61004 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d140000
R13: ffff888027b61008 R14: 0000000000000000 R15: ffff888027b61018
FS:  00007fda971536c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fda971fe794 CR3: 0000000072975000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_gem_handle_create_tail+0x32f/0x540 drivers/gpu/drm/drm_gem.c:407
 drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:417 [inline]
 drm_gem_shmem_dumb_create+0x21a/0x310 drivers/gpu/drm/drm_gem_shmem_helper.c:505
 drm_mode_create_dumb drivers/gpu/drm/drm_dumb_buffers.c:96 [inline]
 drm_mode_create_dumb_ioctl+0x268/0x2f0 drivers/gpu/drm/drm_dumb_buffers.c:102
 drm_ioctl_kernel+0x280/0x4c0 drivers/gpu/drm/drm_ioctl.c:789
 drm_ioctl+0x5cb/0xbf0 drivers/gpu/drm/drm_ioctl.c:892
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fda971954e9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fda971531f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fda9721c3e8 RCX: 00007fda971954e9
RDX: 0000000020000080 RSI: 00000000c02064b2 RDI: 0000000000000003
RBP: 00007fda9721c3e0 R08: 00007fda97152f96 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fda971e917c
R13: 00007fda97153210 R14: 0023647261632f69 R15: 6972642f7665642f
 </TASK>

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/12 02:22 upstream 0bb80ecc33a8 59da8366 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in drm_gem_object_handle_put_unlocked
2023/09/12 01:46 upstream 0bb80ecc33a8 59da8366 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in drm_gem_object_handle_put_unlocked
2023/10/24 21:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c41a7afa00be 17e6d526 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drm_gem_object_handle_put_unlocked
2023/09/12 01:10 upstream 0bb80ecc33a8 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in drm_gem_object_handle_put_unlocked
* Struck through repros no longer work on HEAD.