BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor6/10329 caller is __this_cpu_preempt_check+0x13/0x20 lib/smp_processor_id.c:62 CPU: 1 PID: 10329 Comm: syz-executor6 Not tainted 4.4.105-g36205b7 #4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=511 sclass=netlink_route_socket Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 8064fe5fa80fde7c ffff8800b7c97828 ffffffff81cc9b4f 0000000000000001 ffffffff839fd4a0 ffff8800b7c97868 ffffffff81d28d58 ffffffff83ced1a0 1ffff10016f92f14 ffff8801d6226000 ffff8801d6226d80 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] check_preemption_disabled+0x1b8/0x1f0 lib/smp_processor_id.c:46 [] __this_cpu_preempt_check+0x13/0x20 lib/smp_processor_id.c:62 [] tcp_try_coalesce+0x200/0x4b0 net/ipv4/tcp_input.c:4278 [] tcp_queue_rcv+0xfe/0x720 net/ipv4/tcp_input.c:4485 [] tcp_send_rcvq+0x391/0x4a0 net/ipv4/tcp_input.c:4531 [] tcp_sendmsg+0x1d1c/0x36a0 net/ipv4/tcp.c:1134 [] inet_sendmsg+0x26c/0x430 net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec net/socket.c:625 [inline] [] sock_sendmsg+0xb5/0xf0 net/socket.c:635 [] SYSC_sendto+0x267/0x300 net/socket.c:1665 [] SyS_sendto+0x9/0x10 net/socket.c:1633 [] entry_SYSCALL_64_fastpath+0x16/0x76 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 10410 Comm: syz-executor3 Not tainted 4.4.105-g36205b7 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 a3a2f9f67dcb2ad8 ffff8800b74efa80 ffffffff81cc9b4f 1ffff10016e9df5b 0000000000000030 ffff8800b74efc20 ffffffff815db71b ffff8801d59e4b60 ffff8801d59e4b60 ffff8801d59e4b60 ffff8800b74efbf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163 [] entry_SYSCALL_64_fastpath+0x16/0x76 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 1 PID: 10416 Comm: syz-executor3 Not tainted 4.4.105-g36205b7 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 293e6b635d9bd33d ffff8800b9547a80 ffffffff81cc9b4f 1ffff100172a8f5b 0000000000000030 ffff8800b9547c20 ffffffff815db71b ffff8801d59e4b60 ffff8801d59e4b60 ffff8801d59e4b60 ffff8800b9547bf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163 [] entry_SYSCALL_64_fastpath+0x16/0x76 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 1 PID: 10483 Comm: syz-executor2 Not tainted 4.4.105-g36205b7 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 6cb7c161861d96cf ffff8801d1ecfa80 ffffffff81cc9b4f 1ffff1003a3d9f5b 0000000000000030 ffff8801d1ecfc20 ffffffff815db71b ffff8801d59e11e0 ffff8801d59e11e0 ffff8801d59e11e0 ffff8801d1ecfbf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163 [] entry_SYSCALL_64_fastpath+0x16/0x76 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 10531 Comm: syz-executor2 Not tainted 4.4.105-g36205b7 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 464c52820619d879 ffff8800b74f7a80 ffffffff81cc9b4f 1ffff10016e9ef5b 0000000000000030 ffff8800b74f7c20 ffffffff815db71b ffff8801d59e11e0 ffff8801d59e11e0 ffff8801d59e11e0 ffff8800b74f7bf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163 [] entry_SYSCALL_64_fastpath+0x16/0x76 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 10685 Comm: syz-executor2 Not tainted 4.4.105-g36205b7 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 ec4f3e4f9b3d16a7 ffff8801d446fa80 ffffffff81cc9b4f 1ffff1003a88df5b 0000000000000030 ffff8801d446fc20 ffffffff815db71b ffff8801d59e4b60 ffff8801d59e4b60 ffff8801d59e4b60 ffff8801d446fbf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=94 sclass=netlink_route_socket [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163 [] entry_SYSCALL_64_fastpath+0x16/0x76 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket nla_parse: 29 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. binder: 11006:11007 got transaction with invalid parent offset or type binder: 11006:11007 transaction failed 29201/-22, size 80-8 line 3316 binder: BINDER_SET_CONTEXT_MGR already set binder: 11006:11010 ioctl 40046207 0 returned -16 binder_alloc: 11006: binder_alloc_buf, no vma binder: 11006:11007 transaction failed 29189/-3, size 80-8 line 3131 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 audit: type=1400 audit(1513097758.200:28): avc: denied { create } for pid=11014 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_iscsi_socket permissive=1 binder: 11025:11036 ioctl 40046205 0 returned -22 binder: 11025:11036 ERROR: BC_REGISTER_LOOPER called without request binder: 11028:11029 ioctl 40046205 3 returned -22 binder: 11025:11049 unknown command 29196 binder: 11028:11029 ioctl 40046205 3 returned -22 binder: 11025:11049 ioctl c0306201 20007000 returned -22 netlink: 56 bytes leftover after parsing attributes in process `syz-executor5'. binder: 11025:11058 got reply transaction with no transaction stack netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. binder: 11025:11058 transaction failed 29201/-71, size 24-8 line 2924 binder: undelivered TRANSACTION_ERROR: 29201 binder: 11025:11049 ioctl 40046205 0 returned -22 netlink: 2 bytes leftover after parsing attributes in process `syz-executor7'. binder: 11025:11049 unknown command 0 binder: 11025:11049 ioctl c0306201 20008fd0 returned -22 binder_alloc: 11025: binder_alloc_buf, no vma binder: 11025:11036 transaction failed 29189/-3, size -9136452502804823694--6259034843114309523 line 3131 binder: undelivered TRANSACTION_ERROR: 29189 netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. binder: 11290:11292 ioctl 40046205 0 returned -22 binder: 11290:11292 ERROR: BC_REGISTER_LOOPER called without request binder: 11290:11304 transaction failed 29189/-22, size 0-0 line 3008 binder: 11290:11304 ioctl 40046205 0 returned -22 binder: 11290:11319 ERROR: BC_REGISTER_LOOPER called without request binder: 11290:11328 transaction failed 29189/-22, size 0-0 line 3008 binder: 11290:11304 got reply transaction with no transaction stack binder: 11290:11304 transaction failed 29201/-71, size 24-8 line 2924 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: 11525:11533 ioctl 40046205 0 returned -22 binder: 11525:11533 ERROR: BC_REGISTER_LOOPER called without request binder: 11525:11545 BC_REQUEST_DEATH_NOTIFICATION invalid ref 4 binder: 11525:11545 got reply transaction with no transaction stack binder: 11525:11545 transaction failed 29201/-71, size 24-8 line 2924 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket binder: 11525:11545 ioctl 40046205 0 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 11525:11558 ERROR: BC_REGISTER_LOOPER called without request binder: 11525:11570 BC_REQUEST_DEATH_NOTIFICATION invalid ref 4 binder: 11525:11545 ioctl 40046207 0 returned -16 binder: 11525:11570 got reply transaction with no transaction stack binder: 11525:11570 transaction failed 29201/-71, size 24-8 line 2924 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29201 mmap: syz-executor3 (11732) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. binder_alloc: binder_alloc_mmap_handler: 11830 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 11830:11849 ioctl 40046207 0 returned -16 binder: 11834:11862 got transaction with invalid offset (0, min 0 max 0) or object. binder: 11834:11862 transaction failed 29201/-22, size 0-16 line 3194 binder: 11834:11840 IncRefs 0 refcount change on invalid ref 2 ret -22 binder: 11834:11840 BC_REQUEST_DEATH_NOTIFICATION invalid ref 4 binder: 11834:11840 DecRefs 0 refcount change on invalid ref 3 ret -22 binder: 11834:11840 got reply transaction with no transaction stack binder: 11834:11840 transaction failed 29201/-71, size 48-56 line 2924 binder: 11834:11840 BC_DEAD_BINDER_DONE 0000000000000002 not found binder: 11834:11840 BC_FREE_BUFFER u0000000000000000 no match binder: 11834:11840 got transaction to invalid handle binder: 11834:11840 transaction failed 29201/-22, size 0-32 line 3008 binder_alloc: binder_alloc_mmap_handler: 11834 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 11834:11840 ioctl 40046207 0 returned -16 binder_alloc: 11834: binder_alloc_buf, no vma binder: 11834:11862 transaction failed 29189/-3, size 0-16 line 3131 binder: 11834:11840 BC_DEAD_BINDER_DONE 0000000000000002 not found binder: 11834:11840 BC_FREE_BUFFER u0000000000000000 no match binder: 11834:11840 got transaction to invalid handle binder: 11834:11840 transaction failed 29201/-22, size 0-32 line 3008 binder: undelivered TRANSACTION_ERROR: 29201 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket audit: type=1400 audit(1513097761.460:29): avc: denied { write } for pid=11943 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket SELinux: unrecognized netlink message: protocol=0 nlmsg_type=94 sclass=netlink_route_socket binder: 12112:12114 ioctl 40046205 0 returned -22 binder: 12112:12114 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 12112: binder_alloc_buf, no vma binder: 12112:12144 got reply transaction with no transaction stack binder: 12112:12135 transaction failed 29189/-3, size 0-0 line 3131 binder: 12112:12144 transaction failed 29201/-71, size 24-8 line 2924 binder: 12159:12160 got transaction with invalid parent offset or type binder: undelivered TRANSACTION_ERROR: 29189 binder: 12159:12160 transaction failed 29201/-22, size 80-8 line 3316 binder_alloc: binder_alloc_mmap_handler: 12159 20000000-20002000 already mapped failed -16 binder_alloc: 12159: binder_alloc_buf, no vma binder: 12159:12168 transaction failed 29189/-3, size 80-8 line 3131 binder: BINDER_SET_CONTEXT_MGR already set binder: 12159:12160 ioctl 40046207 0 returned -16 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket SELinux: unrecognized netlink message: protocol=9 nlmsg_type=16 sclass=netlink_audit_socket binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=94 sclass=netlink_route_socket binder: undelivered TRANSACTION_ERROR: 29201 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket binder: 12339:12341 ioctl 40046205 0 returned -22 binder: 12339:12341 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 12339: binder_alloc_buf, no vma binder: 12339:12355 transaction failed 29189/-3, size 0-0 line 3131 nla_parse: 37 callbacks suppressed netlink: 18 bytes leftover after parsing attributes in process `syz-executor7'. binder: undelivered TRANSACTION_ERROR: 29189 netlink: 13 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 56 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 56 bytes leftover after parsing attributes in process `syz-executor0'. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. TCP: request_sock_TCPv6: Possible SYN flooding on port 20014. Sending cookies. Check SNMP counters. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket binder: 12594:12598 ioctl 40046205 0 returned -22 binder: 12594:12598 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 12594: binder_alloc_buf, no vma binder: 12594:12609 transaction failed 29189/-3, size 0-0 line 3131 binder: undelivered TRANSACTION_ERROR: 29189 binder: 12594:12598 ioctl 40046205 0 returned -22 binder: 12594:12609 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 12594: binder_alloc_buf, no vma binder: 12594:12616 transaction failed 29189/-3, size 0-0 line 3131 binder: undelivered TRANSACTION_ERROR: 29189 TCP: request_sock_TCPv6: Possible SYN flooding on port 20014. Sending cookies. Check SNMP counters. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 12951 Comm: syz-executor2 Not tainted 4.4.105-g36205b7 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 37af87ccdb923921 ffff8801d5b8fa80 ffffffff81cc9b4f 1ffff1003ab71f5b 0000000000000030 ffff8801d5b8fc20 ffffffff815db71b ffff8800b8ff0c20 ffff8800b8ff0c20 ffff8800b8ff0c20 ffff8801d5b8fbf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163 [] entry_SYSCALL_64_fastpath+0x16/0x76 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 12962 Comm: syz-executor7 Not tainted 4.4.105-g36205b7 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 70075a1727752a2f ffff8801d1f97a80 ffffffff81cc9b4f 1ffff1003a3f2f5b 0000000000000030 ffff8801d1f97c20 ffffffff815db71b ffff8800b8ff5120 ffff8800b8ff5120 ffff8800b8ff5120 ffff8801d1f97bf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163 [] entry_SYSCALL_64_fastpath+0x16/0x76 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 1 PID: 13053 Comm: syz-executor7 Not tainted 4.4.105-g36205b7 #4 FAULT_FLAG_ALLOW_RETRY missing 30 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 2d2a6ee9ef58b7e6 ffff8800b94f7a80 ffffffff81cc9b4f 1ffff1001729ef5b 0000000000000030 ffff8800b94f7c20 ffffffff815db71b ffff8800b8ff5120 ffff8800b8ff5120 ffff8800b8ff5120 ffff8800b94f7bf8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x8e/0xcf lib/dump_stack.c:51 [] handle_userfault+0x75b/0x1570 fs/userfaultfd.c:316 [] do_anonymous_page mm/memory.c:2731 [inline] [] handle_pte_fault mm/memory.c:3295 [inline] [] __handle_mm_fault mm/memory.c:3426 [inline] [] handle_mm_fault+0x2731/0x39b0 mm/memory.c:3455 [] __do_page_fault+0x2d0/0x910 arch/x86/mm/fault.c:1245 [] do_page_fault+0x22/0x30 arch/x86/mm/fault.c:1308 [] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:985 [] SYSC_sigaltstack kernel/signal.c:3165 [inline] [] SyS_sigaltstack+0x63/0x90 kernel/signal.c:3163