Hello, syzbot found the following issue on: HEAD commit: 33e02dc69afb Merge tag 'sound-6.10-rc1' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13ad18d0980000 kernel config: https://syzkaller.appspot.com/x/.config?x=25544a2faf4bae65 dashboard link: https://syzkaller.appspot.com/bug?extid=d2125fcb6aa8c4276fd2 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=1526a8dc980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f53ae4980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-33e02dc6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/573c88ac3233/vmlinux-33e02dc6.xz kernel image: https://storage.googleapis.com/syzbot-assets/760a52b9a00a/bzImage-33e02dc6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d2125fcb6aa8c4276fd2@xxxxxxxxxxxxxxxxxxxxxxxxx Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 3 PID: 5196 Comm: syz-executor259 Not tainted 6.9.0-syzkaller-07370-g33e02dc69afb #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:219 [inline] RIP: 0010:iter_file_splice_write+0xa24/0x10b0 fs/splice.c:759 Code: 00 48 89 fa 48 c1 ea 03 80 3c 1a 00 0f 85 b1 04 00 00 4d 8b 65 10 49 c7 45 10 00 00 00 00 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 0f 85 1a 05 00 00 49 8b 54 24 08 4c 89 ee 4c 89 ff 83 RSP: 0018:ffffc900031b7930 EFLAGS: 00010202 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8209a1a8 RDX: 0000000000000001 RSI: ffffffff8209a06c RDI: 0000000000000008 RBP: 000000000000003d R08: 0000000000000006 R09: 0000000000000000 R10: 7fffffffffffefff R11: 0000000000000001 R12: 0000000000000000 R13: ffff888026d5a208 R14: 7fffffffffffefff R15: ffff88801e5c5800 FS: 00007f78cdfc16c0(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f78ce0454d0 CR3: 0000000019dc8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x19b/0x6d0 fs/splice.c:1164 splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x17e/0x250 fs/splice.c:1233 do_sendfile+0xaa8/0xdb0 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x1da/0x220 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f78ce009d09 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 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:00007f78cdfc1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f78ce091328 RCX: 00007f78ce009d09 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007f78ce091320 R08: 00007f78cdfc16c0 R09: 0000000000000000 R10: 0000000100000000 R11: 0000000000000246 R12: 00007f78ce09132c R13: 0000000000000006 R14: 00007ffe98369ff0 R15: 00007ffe9836a0d8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:219 [inline] RIP: 0010:iter_file_splice_write+0xa24/0x10b0 fs/splice.c:759 Code: 00 48 89 fa 48 c1 ea 03 80 3c 1a 00 0f 85 b1 04 00 00 4d 8b 65 10 49 c7 45 10 00 00 00 00 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 0f 85 1a 05 00 00 49 8b 54 24 08 4c 89 ee 4c 89 ff 83 RSP: 0018:ffffc900031b7930 EFLAGS: 00010202 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8209a1a8 RDX: 0000000000000001 RSI: ffffffff8209a06c RDI: 0000000000000008 RBP: 000000000000003d R08: 0000000000000006 R09: 0000000000000000 R10: 7fffffffffffefff R11: 0000000000000001 R12: 0000000000000000 R13: ffff888026d5a208 R14: 7fffffffffffefff R15: ffff88801e5c5800 FS: 00007f78cdfc16c0(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f78ce05d0d8 CR3: 0000000019dc8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 48 89 add %cl,-0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 1a 00 cmpb $0x0,(%rdx,%rbx,1) c: 0f 85 b1 04 00 00 jne 0x4c3 12: 4d 8b 65 10 mov 0x10(%r13),%r12 16: 49 c7 45 10 00 00 00 movq $0x0,0x10(%r13) 1d: 00 1e: 49 8d 7c 24 08 lea 0x8(%r12),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 1a 00 cmpb $0x0,(%rdx,%rbx,1) <-- trapping instruction 2e: 0f 85 1a 05 00 00 jne 0x54e 34: 49 8b 54 24 08 mov 0x8(%r12),%rdx 39: 4c 89 ee mov %r13,%rsi 3c: 4c 89 ff mov %r15,%rdi 3f: 83 .byte 0x83 --- 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. 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
