audit: type=1400 audit(1519643872.954:61536): avc: denied { net_admin } for pid=32288 comm="syz-executor0" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=770 sclass=netlink_xfrm_socket pig=32305 comm=syz-executor1 ====================================================== [ INFO: possible circular locking dependency detected ] 4.9.84-ga9d0273 #44 Not tainted ------------------------------------------------------- syz-executor6/32348 is trying to acquire lock: (&mm->mmap_sem){++++++}, at: [] __might_fault+0xe4/0x1d0 mm/memory.c:3993 but task is already holding lock: (ashmem_mutex){+.+.+.}, at: [] ashmem_pin_unpin drivers/staging/android/ashmem.c:714 [inline] (ashmem_mutex){+.+.+.}, at: [] ashmem_ioctl+0x371/0xfe0 drivers/staging/android/ashmem.c:791 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (ashmem_mutex){+.+.+.}: lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756 __mutex_lock_common kernel/locking/mutex.c:521 [inline] mutex_lock_nested+0xbb/0x870 kernel/locking/mutex.c:621 ashmem_mmap+0x53/0x400 drivers/staging/android/ashmem.c:379 mmap_region+0x7dd/0xfd0 mm/mmap.c:1694 do_mmap+0x57b/0xbe0 mm/mmap.c:1473 do_mmap_pgoff include/linux/mm.h:2019 [inline] vm_mmap_pgoff+0x16b/0x1b0 mm/util.c:329 SYSC_mmap_pgoff mm/mmap.c:1523 [inline] SyS_mmap_pgoff+0x33f/0x560 mm/mmap.c:1481 SYSC_mmap arch/x86/kernel/sys_x86_64.c:95 [inline] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:86 do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x47/0xc5 -> #0 (&mm->mmap_sem){++++++}: check_prev_add kernel/locking/lockdep.c:1828 [inline] check_prevs_add kernel/locking/lockdep.c:1938 [inline] validate_chain kernel/locking/lockdep.c:2265 [inline] __lock_acquire+0x2bf9/0x3640 kernel/locking/lockdep.c:3345 lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756 __might_fault+0x14a/0x1d0 mm/memory.c:3994 copy_from_user arch/x86/include/asm/uaccess.h:705 [inline] ashmem_pin_unpin drivers/staging/android/ashmem.c:719 [inline] ashmem_ioctl+0x3c0/0xfe0 drivers/staging/android/ashmem.c:791 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x47/0xc5 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ashmem_mutex); lock(&mm->mmap_sem); lock(ashmem_mutex); lock(&mm->mmap_sem); *** DEADLOCK *** 1 lock held by syz-executor6/32348: #0: (ashmem_mutex){+.+.+.}, at: [] ashmem_pin_unpin drivers/staging/android/ashmem.c:714 [inline] #0: (ashmem_mutex){+.+.+.}, at: [] ashmem_ioctl+0x371/0xfe0 drivers/staging/android/ashmem.c:791 stack backtrace: CPU: 1 PID: 32348 Comm: syz-executor6 Not tainted 4.9.84-ga9d0273 #44 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c89cf908 ffffffff81d956b9 ffffffff853a2cd0 ffffffff853a2cd0 ffffffff853c37f0 ffff8801c9fd08d8 ffff8801c9fd0000 ffff8801c89cf950 ffffffff812387f1 ffff8801c9fd08d8 00000000c9fd08b0 ffff8801c9fd08d8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_circular_bug+0x271/0x310 kernel/locking/lockdep.c:1202 [] check_prev_add kernel/locking/lockdep.c:1828 [inline] [] check_prevs_add kernel/locking/lockdep.c:1938 [inline] [] validate_chain kernel/locking/lockdep.c:2265 [inline] [] __lock_acquire+0x2bf9/0x3640 kernel/locking/lockdep.c:3345 [] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756 [] __might_fault+0x14a/0x1d0 mm/memory.c:3994 [] copy_from_user arch/x86/include/asm/uaccess.h:705 [inline] [] ashmem_pin_unpin drivers/staging/android/ashmem.c:719 [inline] [] ashmem_ioctl+0x3c0/0xfe0 drivers/staging/android/ashmem.c:791 [] vfs_ioctl fs/ioctl.c:43 [inline] [] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 [] SYSC_ioctl fs/ioctl.c:694 [inline] [] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 [] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x47/0xc5 Option '°i§Ôe"`ŠÔ"°Ç~†³^yº°[ é«zïB´xý «Ög‚ÿ' to dns_resolver key: bad/missing value Option '°i§Ôe"`ŠÔ"°Ç~†³^yº°[ é«zïB´xý «Ög‚ÿ' to dns_resolver key: bad/missing value mip6: mip6_rthdr_init_state: state's mode is not 2: 0 rfkill: input handler disabled mip6: mip6_rthdr_init_state: state's mode is not 2: 0 mip6: mip6_rthdr_init_state: state's mode is not 2: 0 rfkill: input handler enabled rfkill: input handler disabled mip6: mip6_rthdr_init_state: state's mode is not 2: 0 rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled device gre0 entered promiscuous mode SELinux: policydb version 0 does not match my version range 15-30 SELinux: policydb version 0 does not match my version range 15-30 SELinux: policydb version 0 does not match my version range 15-30 SELinux: policydb version 0 does not match my version range 15-30 binder_alloc: 387: binder_alloc_buf, no vma binder: 387:393 transaction failed 29189/-3, size 0-0 line 3127 binder: 387:393 ERROR: BC_REGISTER_LOOPER called without request binder: BINDER_SET_CONTEXT_MGR already set binder: 387:426 ioctl 40046207 0 returned -16 binder_alloc: 387: binder_alloc_buf, no vma binder: 387:412 transaction failed 29189/-3, size 0-0 line 3127 binder: 387:426 ERROR: BC_REGISTER_LOOPER called without request device syz4 entered promiscuous mode device syz4 left promiscuous mode tmpfs: No value for mount option '' audit_printk_skb: 4572 callbacks suppressed audit: type=1400 audit(1519643877.944:63062): avc: denied { net_admin } for pid=31070 comm="syz-executor4" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.944:63063): avc: denied { net_admin } for pid=832 comm="syz-executor6" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.954:63064): avc: denied { net_admin } for pid=832 comm="syz-executor6" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.954:63065): avc: denied { net_admin } for pid=3745 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.954:63066): avc: denied { net_admin } for pid=3745 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.954:63067): avc: denied { net_admin } for pid=3745 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.954:63068): avc: denied { net_admin } for pid=3745 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.954:63069): avc: denied { net_admin } for pid=3745 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.954:63070): avc: denied { net_admin } for pid=10835 comm="syz-executor1" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643877.964:63071): avc: denied { net_admin } for pid=10835 comm="syz-executor1" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 IPVS: Creating netns size=2536 id=29 IPVS: Creating netns size=2536 id=30 netlink: 6 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor3'. binder: 1609:1615 got transaction to invalid handle binder: 1609:1615 transaction failed 29201/-22, size 0-0 line 3004 binder: 1609:1615 got transaction to invalid handle binder: 1609:1615 transaction failed 29201/-22, size 0-0 line 3004 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29201 TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. audit_printk_skb: 5258 callbacks suppressed audit: type=1400 audit(1519643882.954:64825): avc: denied { net_admin } for pid=3738 comm="syz-executor3" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643882.964:64826): avc: denied { dac_override } for pid=2060 comm="syz-executor0" capability=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643882.964:64827): avc: denied { net_admin } for pid=2060 comm="syz-executor0" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643882.964:64828): avc: denied { net_admin } for pid=2060 comm="syz-executor0" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643882.964:64829): avc: denied { dac_override } for pid=2060 comm="syz-executor0" capability=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643882.994:64830): avc: denied { net_raw } for pid=2052 comm="syz-executor7" capability=13 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643883.004:64832): avc: denied { net_admin } for pid=27564 comm="syz-executor2" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643883.004:64833): avc: denied { net_admin } for pid=27564 comm="syz-executor2" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643883.004:64834): avc: denied { net_admin } for pid=27564 comm="syz-executor2" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519643882.994:64831): avc: denied { net_admin } for pid=2060 comm="syz-executor0" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 netlink: 6 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor3'.