On Wed, Oct 09, 2024 at 03:20:22AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: fc20a3e57247 Merge tag 'for-linus-6.12a-rc2-tag' of git://.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=110fb307980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=9775e9a1af839423 > dashboard link: https://syzkaller.appspot.com/bug?extid=0ee1ef35cf7e70ce55d7 > 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=11d0a79f980000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/64ef5d6cfda3/disk-fc20a3e5.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/42c0ee676795/vmlinux-fc20a3e5.xz > kernel image: https://storage.googleapis.com/syzbot-assets/a3072d6383ea/bzImage-fc20a3e5.xz > mounted in repro: https://storage.googleapis.com/syzbot-assets/a8f928c45431/mount_0.gz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+0ee1ef35cf7e70ce55d7@xxxxxxxxxxxxxxxxxxxxxxxxx > > INFO: task syz.2.17:5434 blocked for more than 159 seconds. > Not tainted 6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz.2.17 state:D stack:27424 pid:5434 tgid:5432 ppid:5316 flags:0x00000004 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5315 [inline] > __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675 > __schedule_loop kernel/sched/core.c:6752 [inline] > schedule+0x14b/0x320 kernel/sched/core.c:6767 > schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 > __mutex_lock_common kernel/locking/mutex.c:684 [inline] > __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 > fdget_pos+0x24e/0x320 fs/file.c:1160 > ksys_read+0x7e/0x2b0 fs/read_write.c:703 > 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: 0033:0x7f993c77dff9 > RSP: 002b:00007f993d54e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 > RAX: ffffffffffffffda RBX: 00007f993c936058 RCX: 00007f993c77dff9 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 > RBP: 00007f993c7f0296 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000000001 R14: 00007f993c936058 R15: 00007fffb8436518 > </TASK> > INFO: task syz.3.18:5439 blocked for more than 167 seconds. > Not tainted 6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz.3.18 state:D stack:27424 pid:5439 tgid:5436 ppid:5317 flags:0x00000004 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5315 [inline] > __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675 > __schedule_loop kernel/sched/core.c:6752 [inline] > schedule+0x14b/0x320 kernel/sched/core.c:6767 > schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 > __mutex_lock_common kernel/locking/mutex.c:684 [inline] > __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 > fdget_pos+0x24e/0x320 fs/file.c:1160 > ksys_read+0x7e/0x2b0 fs/read_write.c:703 > 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: 0033:0x7f1134d7dff9 > RSP: 002b:00007f1135adc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 > RAX: ffffffffffffffda RBX: 00007f1134f36058 RCX: 00007f1134d7dff9 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 > RBP: 00007f1134df0296 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000000001 R14: 00007f1134f36058 R15: 00007ffe6e122188 > </TASK> > INFO: task syz.4.19:5441 blocked for more than 168 seconds. > Not tainted 6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz.4.19 state:D stack:27424 pid:5441 tgid:5438 ppid:5327 flags:0x00000004 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5315 [inline] > __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675 > __schedule_loop kernel/sched/core.c:6752 [inline] > schedule+0x14b/0x320 kernel/sched/core.c:6767 > schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 > __mutex_lock_common kernel/locking/mutex.c:684 [inline] > __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 > fdget_pos+0x24e/0x320 fs/file.c:1160 > ksys_read+0x7e/0x2b0 fs/read_write.c:703 > 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: 0033:0x7f4c9ad7dff9 > RSP: 002b:00007f4c9bc43038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 > > > --- > 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: Someone assigned this to bcachefs, and it's clearly not: #syz set subsystems: fs kernfs
