[syzbot] [dri?] WARNING in drm_prime_destroy_file_private (2)

Wed Dec 27 20:51:18 UTC 2023

Hello,

syzbot found the following issue on:

HEAD commit:    5254c0cbc92d Merge tag 'block-6.7-2023-12-22' of git://git..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=10cc6995e80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=314e9ad033a7d3a7
dashboard link: https://syzkaller.appspot.com/bug?extid=59dcc2e7283a6f5f5ba1
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13e35809e80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=155d5fd6e80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ebe09a5995ee/disk-5254c0cb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/02178d7f5f98/vmlinux-5254c0cb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/12307f47d87c/bzImage-5254c0cb.xz

The issue was bisected to:

commit ea4452de2ae987342fadbdd2c044034e6480daad
Author: Qi Zheng <zhengqi.arch at bytedance.com>
Date:   Fri Nov 18 10:00:11 2022 +0000

    mm: fix unexpected changes to {failslab|fail_page_alloc}.attr

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13027f76e80000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10827f76e80000
console output: https://syzkaller.appspot.com/x/log.txt?x=17027f76e80000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+59dcc2e7283a6f5f5ba1 at syzkaller.appspotmail.com
Fixes: ea4452de2ae9 ("mm: fix unexpected changes to {failslab|fail_page_alloc}.attr")

R10: 0000000000000000 R11: 0000000000000246 R12: 00007efe98069194
R13: 00007efe97fd2210 R14: 0000000000000002 R15: 6972642f7665642f
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5107 at drivers/gpu/drm/drm_prime.c:227 drm_prime_destroy_file_private+0x43/0x60 drivers/gpu/drm/drm_prime.c:227
Modules linked in:
CPU: 0 PID: 5107 Comm: syz-executor227 Not tainted 6.7.0-rc6-syzkaller-00248-g5254c0cbc92d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:drm_prime_destroy_file_private+0x43/0x60 drivers/gpu/drm/drm_prime.c:227
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 21 48 8b 83 90 00 00 00 48 85 c0 75 06 5b e9 13 f1 93 fc e8 0e f1 93 fc 90 <0f> 0b 90 5b e9 04 f1 93 fc e8 3f 9b ea fc eb d8 66 66 2e 0f 1f 84
RSP: 0018:ffffc90003bdf9e0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888019f28378 RCX: ffffc90003bdf9b0
RDX: ffff888018ff9dc0 RSI: ffffffff84f380c2 RDI: ffff888019f28408
RBP: ffff888019f28000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f193a57 R11: 0000000000000000 R12: ffff88814829a000
R13: ffff888019f282a8 R14: ffff88814829a068 R15: ffff88814829a0a0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efe98050410 CR3: 000000006d1ff000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 drm_file_free.part.0+0x738/0xb90 drivers/gpu/drm/drm_file.c:290
 drm_file_free drivers/gpu/drm/drm_file.c:247 [inline]
 drm_close_helper.isra.0+0x180/0x1f0 drivers/gpu/drm/drm_file.c:307
 drm_release+0x22a/0x4f0 drivers/gpu/drm/drm_file.c:494
 __fput+0x270/0xb70 fs/file_table.c:394
 task_work_run+0x14d/0x240 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa8a/0x2ad0 kernel/exit.c:869
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1018
 get_signal+0x23b5/0x2790 kernel/signal.c:2904
 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7efe98014769
Code: Unable to access opcode bytes at 0x7efe9801473f.
RSP: 002b:00007efe97fd2208 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007efe9809c408 RCX: 00007efe98014769
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efe9809c408
RBP: 00007efe9809c400 R08: 0000000000003131 R09: 0000000000003131
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efe98069194
R13: 00007efe97fd2210 R14: 0000000000000002 R15: 6972642f7665642f
 </TASK>

---
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