Hello, syzbot found the following issue on: HEAD commit: 0e1980c40b6e Add linux-next specific files for 20240531 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=13ac4616980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d9c3ca4e54577b88 dashboard link: https://syzkaller.appspot.com/bug?extid=b2cfdac9ae5278d4b621 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f01564980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14484aba980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/44fb1d8b5978/disk-0e1980c4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a66ce5caf0b2/vmlinux-0e1980c4.xz kernel image: https://storage.googleapis.com/syzbot-assets/8992fc8fe046/bzImage-0e1980c4.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/8530480d64fb/mount_0.gz The issue was bisected to: commit 344a1d8575b05298d0702a9f9231e57db86a855e Author: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx> Date: Thu Apr 11 06:59:42 2024 +0000 udmabuf: convert udmabuf driver to use folios bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=153a7026980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=173a7026980000 console output: https://syzkaller.appspot.com/x/log.txt?x=133a7026980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b2cfdac9ae5278d4b621@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 344a1d8575b0 ("udmabuf: convert udmabuf driver to use folios") VFS: Close: file count is 0 (f_op=shmem_file_operations) ------------[ cut here ]------------ kernel BUG at fs/open.c:1514! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 5089 Comm: syz-executor317 Not tainted 6.10.0-rc1-next-20240531-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:filp_flush+0x152/0x160 fs/open.c:1512 Code: e9 80 e1 07 80 c1 03 38 c1 7c a6 48 89 ef e8 c5 03 f0 ff eb 9c e8 6e 16 8a ff 48 c7 c7 20 59 d8 8b 48 89 ee e8 6f 84 7d 09 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900033bfc80 EFLAGS: 00010246 RAX: 0000000000000038 RBX: 0000000000000000 RCX: fe0d96255f7cdc00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffffff8bd42dc0 R08: ffffffff8176b129 R09: 1ffff92000677f2c R10: dffffc0000000000 R11: fffff52000677f2d R12: ffff8880784d9680 R13: dffffc0000000000 R14: ffff88807aa761c0 R15: 0000000000000009 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000003f3be538 CR3: 000000007f062000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> filp_close+0x1e/0x40 fs/open.c:1532 close_files fs/file.c:437 [inline] put_files_struct+0x1b6/0x360 fs/file.c:452 do_exit+0xa08/0x28e0 kernel/exit.c:869 do_group_exit+0x207/0x2c0 kernel/exit.c:1023 __do_sys_exit_group kernel/exit.c:1034 [inline] __se_sys_exit_group kernel/exit.c:1032 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1032 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc324e0fd09 Code: Unable to access opcode bytes at 0x7fc324e0fcdf. RSP: 002b:00007fffe9a711b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc324e0fd09 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007fc324e8b2d0 R08: ffffffffffffffb8 R09: 0000555580c204c0 R10: 0000555580c204c0 R11: 0000000000000246 R12: 00007fc324e8b2d0 R13: 0000000000000000 R14: 00007fc324e8c040 R15: 00007fc324dddf00 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:filp_flush+0x152/0x160 fs/open.c:1512 Code: e9 80 e1 07 80 c1 03 38 c1 7c a6 48 89 ef e8 c5 03 f0 ff eb 9c e8 6e 16 8a ff 48 c7 c7 20 59 d8 8b 48 89 ee e8 6f 84 7d 09 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900033bfc80 EFLAGS: 00010246 RAX: 0000000000000038 RBX: 0000000000000000 RCX: fe0d96255f7cdc00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffffff8bd42dc0 R08: ffffffff8176b129 R09: 1ffff92000677f2c R10: dffffc0000000000 R11: fffff52000677f2d R12: ffff8880784d9680 R13: dffffc0000000000 R14: ffff88807aa761c0 R15: 0000000000000009 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000003f3be538 CR3: 000000007f062000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
