On Sun, Dec 3, 2017 at 3:31 PM, syzbot <bot+e38be687a2450270a3b593bacb6b5795a7a74edb@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzkaller hit the following crash on > 2db767d9889cef087149a5eaa35c1497671fa40f > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > > Unfortunately, I don't have any reproducer for this bug yet. > > > BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 48s! > BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 47s! > Showing busy workqueues and worker pools: > workqueue events: flags=0x0 > pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 > pending: perf_sched_delayed, vmstat_shepherd, jump_label_update_timeout, > cache_reap > workqueue events_power_efficient: flags=0x80 > pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 > pending: neigh_periodic_work, neigh_periodic_work, do_cache_clean, > reg_check_chans_work > workqueue mm_percpu_wq: flags=0x8 > pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 > pending: vmstat_update > workqueue writeback: flags=0x4e > pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256 > in-flight: 3401:wb_workfn > workqueue kblockd: flags=0x18 > pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256 > pending: blk_mq_timeout_work > pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=11 idle: 3423 4249 92 21 This error report does not look actionable. Perhaps if code that detect it would dump cpu/task stacks, it would be actionable. > 3549 34 4803 5 4243 3414 > audit: type=1326 audit(1512291140.021:615): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.044:616): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.045:617): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=55 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.045:618): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.045:619): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.047:620): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=257 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.047:621): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.047:622): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.048:623): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=16 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291140.049:624): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > netlink: 2 bytes leftover after parsing attributes in process > `syz-executor2'. > netlink: 2 bytes leftover after parsing attributes in process > `syz-executor2'. > netlink: 17 bytes leftover after parsing attributes in process > `syz-executor7'. > device gre0 entered promiscuous mode > device gre0 entered promiscuous mode > could not allocate digest TFM handle [vmnet1% > could not allocate digest TFM handle [vmnet1% > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=7 > sclass=netlink_route_socket pig=7627 comm=syz-executor3 > sock: sock_set_timeout: `syz-executor6' (pid 7625) tries to set negative > timeout > Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=7648 comm=syz-executor3 > sock: sock_set_timeout: `syz-executor6' (pid 7625) tries to set negative > timeout > Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=7 > sclass=netlink_route_socket pig=7648 comm=syz-executor3 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=7627 comm=syz-executor3 > Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable > Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable > netlink: 4 bytes leftover after parsing attributes in process > `syz-executor3'. > netlink: 4 bytes leftover after parsing attributes in process > `syz-executor3'. > netlink: 1 bytes leftover after parsing attributes in process > `syz-executor3'. > QAT: Invalid ioctl > netlink: 1 bytes leftover after parsing attributes in process > `syz-executor3'. > QAT: Invalid ioctl > FAULT_INJECTION: forcing a failure. > name failslab, interval 1, probability 0, space 0, times 1 > CPU: 1 PID: 7838 Comm: syz-executor4 Not tainted 4.15.0-rc1+ #205 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x257 lib/dump_stack.c:53 > fail_dump lib/fault-inject.c:51 [inline] > should_fail+0x8c0/0xa40 lib/fault-inject.c:149 > should_failslab+0xec/0x120 mm/failslab.c:32 > slab_pre_alloc_hook mm/slab.h:421 [inline] > slab_alloc mm/slab.c:3371 [inline] > __do_kmalloc mm/slab.c:3709 [inline] > __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3726 > memdup_user+0x2c/0x90 mm/util.c:164 > msr_io+0xec/0x3b0 arch/x86/kvm/x86.c:2650 > kvm_arch_vcpu_ioctl+0x31d/0x4710 arch/x86/kvm/x86.c:3566 > kvm_vcpu_ioctl+0x240/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2726 > vfs_ioctl fs/ioctl.c:46 [inline] > do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686 > SYSC_ioctl fs/ioctl.c:701 [inline] > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 > entry_SYSCALL_64_fastpath+0x1f/0x96 > RIP: 0033:0x4529d9 > RSP: 002b:00007fd7722d4c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007fd7722d4aa0 RCX: 00000000004529d9 > RDX: 0000000020002000 RSI: 000000004008ae89 RDI: 0000000000000016 > RBP: 00007fd7722d4a90 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b759b > R13: 00007fd7722d4bc8 R14: 00000000004b759b R15: 0000000000000000 > device lo left promiscuous mode > device lo entered promiscuous mode > device lo left promiscuous mode > kvm_hv_set_msr: 127 callbacks suppressed > kvm [8010]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008e data > 0x47 > kvm [8010]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008c data > 0x47 > kvm [8010]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x4000008a data > 0x47 > kvm [8010]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000088 data > 0x47 > kvm [8010]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000086 data > 0x47 > program syz-executor2 is using a deprecated SCSI ioctl, please convert it to > SG_IO > sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 > program syz-executor2 is using a deprecated SCSI ioctl, please convert it to > SG_IO > sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 > netlink: 2 bytes leftover after parsing attributes in process > `syz-executor5'. > program syz-executor2 is using a deprecated SCSI ioctl, please convert it to > SG_IO > sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 > netlink: 2 bytes leftover after parsing attributes in process > `syz-executor5'. > program syz-executor2 is using a deprecated SCSI ioctl, please convert it to > SG_IO > sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 > kauditd_printk_skb: 264 callbacks suppressed > audit: type=1326 audit(1512291148.643:889): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.643:890): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.643:891): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=22 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.650:892): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.650:893): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=54 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.650:894): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.650:895): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=298 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.672:896): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > audit: type=1326 audit(1512291148.705:897): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40cd11 > code=0x7ffc0000 > audit: type=1326 audit(1512291148.705:898): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0x7ffc0000 > QAT: Invalid ioctl > QAT: Invalid ioctl > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@xxxxxxxxxxxxxxxx. > Please credit me with: Reported-by: syzbot <syzkaller@xxxxxxxxxxxxxxxx> > > syzbot will keep track of this bug report. > Once a fix for this bug is committed, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/94eb2c03c9bc75aff2055f70734c%40google.com. > For more options, visit https://groups.google.com/d/optout. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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