Hello,
syzbot found the following issue on:
HEAD commit: ea4424be1688 Merge tag 'mtd/fixes-for-5.17-rc8' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14095f9e700000 kernel config: https://syzkaller.appspot.com/x/.config?x=aba0ab2928a512c2 dashboard link: https://syzkaller.appspot.com/bug?extid=2448673875b4e20db46a compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2448673875b4e20db46a@syzkaller.appspotmail.com
------------[ cut here ]------------ WARNING: CPU: 1 PID: 16791 at drivers/gpu/drm/drm_prime.c:228 drm_prime_destroy_file_private+0x3e/0x50 drivers/gpu/drm/drm_prime.c:228 Modules linked in: CPU: 1 PID: 16791 Comm: syz-executor.5 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:drm_prime_destroy_file_private+0x3e/0x50 drivers/gpu/drm/drm_prime.c:228 Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 1f 48 8b 83 90 00 00 00 48 85 c0 75 06 5b e9 e7 6c 1d fd e8 e2 6c 1d fd <0f> 0b 5b e9 da 6c 1d fd e8 05 5a 64 fd eb da 0f 1f 00 41 55 49 89 RSP: 0018:ffffc90002af79e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888025e72370 RCX: 0000000000000000 RDX: ffff8880727aa1c0 RSI: ffffffff845a788e RDI: ffff888025e72400 RBP: ffff8881471d4068 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817e23e8 R11: 0000000000088078 R12: ffff888025e72000 R13: ffff888025e722b8 R14: ffff8881471d4098 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffea39ef0d8 CR3: 00000000791d8000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> drm_file_free.part.0+0x6e5/0xb80 drivers/gpu/drm/drm_file.c:291 drm_file_free drivers/gpu/drm/drm_file.c:248 [inline] drm_close_helper.isra.0+0x17d/0x1f0 drivers/gpu/drm/drm_file.c:308 drm_release+0x1e6/0x530 drivers/gpu/drm/drm_file.c:495 __fput+0x286/0x9f0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xb29/0x2a30 kernel/exit.c:806 do_group_exit+0xd2/0x2f0 kernel/exit.c:935 get_signal+0x45a/0x2490 kernel/signal.c:2863 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:288 RIP: 0033:0x7f836c6a0471 Code: Unable to access opcode bytes at RIP 0x7f836c6a0447. RSP: 002b:00007f836afd22f0 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f836afd2700 RCX: 00007f836c6a0471 RDX: 00007f836afd29d0 RSI: 00007f836afd22f0 RDI: 00000000003d0f00 RBP: 00007ffed5e285a0 R08: 00007f836afd2700 R09: 00007f836afd2700 R10: 00007f836afd29d0 R11: 0000000000000206 R12: 00007ffed5e2840e R13: 00007ffed5e2840f R14: 00007f836afd2300 R15: 0000000000022000 </TASK>
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