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Title Repro Cause bisect Fix bisect Count Last Reported Patched Closed Patch
assert "nlevel >= IPL_NONE" failed in intr.c (2) 122 3d13h 261d 3/3 3d12h a921796a245d make sure bpfsdetach is holding a bpf_d ref when invalidating stuff.
pool: double put: shmpl 12 16d 89d 3/3 15d 4a445d448ac2 Prevent a double free by unlinking the descriptor before unmaping & freeing it.
panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg) 70 29d 33d 3/3 19d 0535051c104d Check if the mapping for an vm_map_entry exists while holding its lock.
panic: free: size too large NUM > NUM (ADDR) type sysctl 1 59d 59d 3/3 57d dd2b8016139a Fix sleeping race during malloc in sysctl hw.disknames.
assert "to_ticks >= NUM" failed in kern_timeout.c 1 115d 115d 3/3 107d 2293e68203ec restrict the maximum wait time you can set via BIOCSWTIMEOUT to 5 minutes.
multicore boot error: uvm_fault (2) 12 334d 334d 3/3 131d ef9354f58d69 sync
panic: lock (rwlock) solock not locked C 33 809d 809d 3/3 133d ef9354f58d69 sync
witness: reversal: lock order data missing (3) 8192 133d 981d 3/3 133d ef9354f58d69 sync
panic: vmxon failed syz 3 222d 228d 3/3 221d ddfb6951b469 vmm: protect vmm activation with the vmm_softc rwlock.
uvm_fault: igmp_leavegroup (5) C 12 223d 225d 3/3 223d 4733ced31b52 Prevent changing interface loopback flag from userland.
panic: unix: lock not held C 2 235d 235d 3/3 230d e679c1f37540 Allow listen(2) only on sockets of type SOCK_STREAM or SOCK_SEQPACKET. listen(2) man(1) page clearly prohibits sockets of other types.
panic: rw_enter: unix locking against myself C 2 253d 253d 3/3 248d d1ea0a7c7de9 Do UNP_CONNECTING and UNP_BINDING flags check in uipc_listen() and return EINVAL if set. This prevents concurrent solisten() thread to make this socket listening while socket is unlocked.
panic: malformed IPv4 option passed to ip_optcopy (3) syz 40 260d 262d 3/3 260d c8a0ef6cb991 Validate IPv4 packet options in divert output.
assert "to->to_kclock == KCLOCK_UPTIME" failed in kern_timeout.c (3) 1 284d 284d 3/3 271d 0a34672fd384 timeout: make to_kclock validation more rigorous
kqueue: knote !ACTIVE (3) 1 291d 291d 3/3 289d d618cc99d763 Invert broken check of panic string in if_linkstate().
assert "sin6tosa(&ro->ro_dst)->sa_family == AF_INET6" failed in in6_src.c C 218 292d 294d 3/3 292d 4a2c3c9ecbcf In in_pcbrtentry() add missing return of in6_pcbrtentry() value.
uvm_fault: refcnt_take 1 308d 308d 3/3 307d 470ec98d6191 Backout priterator() for walking allprocess list.
protection_fault: fill_file (3) 1 317d 317d 3/3 310d d221342b6cd4 Introduce priterator(), the `ps_list' iterator. Some of `allprocess' list walkthroughs have context switch within, so make exit1() wait until the last reference released.
witness: reversal: solock pf_lock 2 315d 322d 3/3 314d 66bd633ef3ce Use domain name for socket lock.
witness: reversal: pf_lock solock syz 23 314d 321d 3/3 314d 66bd633ef3ce Use domain name for socket lock.
assert "dtlookup(unit) == NULL" failed in dt_dev.c (3) 1 325d 325d 3/3 323d c57c5c683707 Prevent simultaneous dt(4) open.
assert "__mp_lock_held(&sched_lock, curcpu()) == NUM" failed in kern_lock.c (4) 1 338d 338d 3/3 338d 540e94b5c59a soreceive() must not hold mutex when calling sblock().
panic: assertwaitok: non-zero mutex count: NUM C 10 338d 338d 3/3 338d 540e94b5c59a soreceive() must not hold mutex when calling sblock().
uvm_fault: rtrequest (2) C 15 374d 374d 3/3 373d a08e228de7c0 Fix rt_setgate() error handling.
assert "!_kernel_lock_held()" failed in kern_fork.c (3) 107 388d 1038d 3/3 387d 6d6c8141fa4d Adjust KERNEL_ASSERT_UNLOCKED() to not assert during a panic.
assert "!_kernel_lock_held()" failed in uvm_map.c (2) 13 423d 640d 3/3 387d 6d6c8141fa4d Adjust KERNEL_ASSERT_UNLOCKED() to not assert during a panic.
assert "((len + sizeof(long) - NUM) &~ (sizeof(long) - NUM)) <= M_SIZE(m)" failed in uipc_mbuf.c C 2 400d 400d 3/3 397d 7b4d35e0a60b Avoid assertion failure when splitting mbuf cluster.
multicore boot error: witness: lock_object uninitialized: ADDR 108 410d 413d 3/3 410d 33aa5105d87e Revert commitid: KtmyJEoS0WWxmlZ5 --- Protect interface queues with read once and mutex.
assert "p->p_stat == SONPROC || p->p_stat == SSLEEP || p->p_stat == SSTOP" failed in kern_synch.c syz 10 431d 461d 3/3 428d de92f022b000 Before coredump or in pledge_fail use SINGLE_UNWIND to stop all threads.
assert "type != NULL" failed in subr_witness.c syz 1 443d 443d 3/3 434d ed07db5bc17e Revert commitid: yfAefyNWibUyjkU2, ESyyH5EKxtrXGkS6 and itscfpFvJLOj8mHB;
assert "nlevel >= IPL_NONE" failed in intr.c C 259 435d 443d 3/3 434d ed07db5bc17e Revert commitid: yfAefyNWibUyjkU2, ESyyH5EKxtrXGkS6 and itscfpFvJLOj8mHB;
witness: reversal: &sched_lock &pr->ps_mtx syz 170 438d 440d 3/3 438d 4ab8b759f72e Fix SCHED_LOCK() leak in single_thread_set()
kernel: integer divide fault trap, code=NUM (4) C 6 523d 579d 3/3 516d 6d14abdcc245 Avoid division by 0 in m_pool_used
panic: rw_enter: rtlck locking against myself 5 663d 664d 3/3 663d aa5e72b7343d Revert the `rt_lock' rwlock(9) diff to fix the recursive rwlock(9) acquisition.
panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock (7) syz 9 691d 706d 3/3 678d 9cf4e548dcbe Use solock() instead solock_shared() within sys_getsockopt(). Otherwise we acquiring kernel lock with mutex(9) held. This partially reverts rev 1.205 of sys/kern/uipc_syscalls.c. Shared solock() is still fine for getsockname(2) and getpeername(2).
pool: free list modified: semapl syz 2 836d 836d 3/3 784d 5bf1588a93fe Fix memory corruptions with sysv semaphores due to sleeps in copyin, copyout and malloc. During a sleep another thread could delete the semaphore (and possibly allocate another one at the same location with different permissions) which would lead to an invalid access after wake up. Therefore check the semaphore pointer, the sequence, the permissions and some values in seminfo after each sleep. OK bluhm@ Reported-by: syzbot+60ba811fe2e8a6b0f975@syzkaller.appspotmail.com
panic: solock: lock not held C 19 809d 809d 3/3 809d 536333f5835e Use pru_send function to check socket splicing compatibility. Only checking socket type is not sufficient as it could splice together unix and inet sockets resulting in crashes. As splicing is about sending, the same send function looks like a good criteria. Reported-by: syzbot+fc6901d63d858d5dd00a@syzkaller.appspotmail.com Reported-by: syzbot+0e026f1bf8b259c6395e@syzkaller.appspotmail.com OK gnezdo@
assert "uvn->u_obj.uo_refs == NUM" failed in uvm_vnode.c syz 8 824d 876d 3/3 812d ce1ab8dd6b18 Lock vmobjlock then check u_flags & UVM_VNODE_VALID in uvn_attach
kernel: integer divide fault trap, code=NUM (3) C 157 813d 835d 3/3 813d b18f9d9c6b70 Syzkaller found a missing input validation in pipex mppe keylenbits. Reported-by: syzbot+2eca95b271d07ab91b43@syzkaller.appspotmail.com tested yasuoka@; OK mvs@ yasuoka@
panic: tcp_output C 762 814d 816d 3/3 814d 355f588a8749 Sendmsg could crash in tcp_output due to a missing check after the introduction of tcp_send. OK mvs@, bluhm@, gnezdo@ Reported-by: syzbot+e859fd353c90eeac26f8@syzkaller.appspotmail.com
no output from test machine (7) C 124310 842d 1464d 3/3 842d fa90ac5c787b Add a pool for the allocation of the pf_anchor struct. It was possible to exhaust kernel memory by repeatedly calling pfioctl DIOCXBEGIN with different anchor names. OK bluhm@ Reported-by: syzbot+9dd98cbce69e26f0fc11@syzkaller.appspotmail.com
witness: userret: sendmsg C 28 873d 873d 3/3 873d 635da3731041 Unlock peer in the SOCK_STREAM and SOCK_SEQPACKET error path.
assert "__mp_lock_held(&sched_lock, curcpu()) == NUM" failed in kern_lock.c C 860 875d 986d 3/3 875d 1690b19512cc Move the deep check back into the loop. There are ways that even though we're deep the code will SSTOP and sleep and then on wakeup we need to recheck the deep conditions. Issue analyzed and OK by mpi@
pool: free list modified: fdescpl (2) C 6 884d 929d 3/3 878d dc399801d5c5 kqueue: Clear task when closing kqueue
protection_fault: pf_anchor_global_RB_REMOVE 73 917d 1004d 3/3 878d 30d709c8a85c Allow waiting during ktable allocation in pf_ioctl.
uvm_fault: pf_anchor_global_RB_INSERT_COLOR (2) 1 880d 880d 3/3 878d 30d709c8a85c Allow waiting during ktable allocation in pf_ioctl.
assert "TAILQ_EMPTY(&lock->lf_blkhd)" failed in vfs_lockf.c (2) C 2 909d 909d 3/3 903d ee8a225221fd Fix ambiguity with lock range end
panic: m_copydata: null mbuf (2) syz 2 915d 915d 3/3 912d 0271abd8e494 In pf the kernel paniced if IP options in packet within ICMP payload were truncated. Drop such packets instead. Reported-by: syzbot+91abd3aa2fdfe900f9ce@syzkaller.appspotmail.com OK sashan@ claudio@
multicore build error (15) 6 931d 931d 3/3 930d ba537df4ec28 Using mutex initializer for static variable does not compile with witness. Make ratecheck mutex global. Reported-by: syzbot+9864ba1338526d0e8aca@syzkaller.appspotmail.com
witness: reversal: pf_lock netlock (3) syz 25 937d 949d 3/3 937d f3a753b5d089 Release PF und NET lock before calling copyout for DIOCIGETIFACES. OK sashan@ Reported-by: syzbot+b6afd166e314799e3809@syzkaller.appspotmail.com
protection_fault: lf_advlock C 2 984d 1029d 3/3 938d c30ab30fe47b Remove the lock if an identical overlapping one is already present. Preventing a use after free discovered by syzkaller.
protection_fault: lf_findoverlap C 2 951d 983d 3/3 938d c30ab30fe47b Remove the lock if an identical overlapping one is already present. Preventing a use after free discovered by syzkaller.
assert "TAILQ_EMPTY(&lock->lf_blkhd)" failed in vfs_lockf.c 1 951d 951d 3/3 938d c30ab30fe47b Remove the lock if an identical overlapping one is already present. Preventing a use after free discovered by syzkaller.
protection_fault: lf_clearlock C 1 954d 954d 3/3 938d c30ab30fe47b Remove the lock if an identical overlapping one is already present. Preventing a use after free discovered by syzkaller.
witness: reversal: pf_lock netlock (2) C 2 957d 957d 3/3 956d 2e34be423f16 Release PF und NET lock before calling copyin for DIOCXROLLBACK. OK bluhm@ Reported-by: syzbot+2945769fc3e6fd9ee413@syzkaller.appspotmail.com
witness: reversal: pf_lock netlock C 19 969d 1021d 3/3 958d 82d8999861ab Release PF und NET lock before calling copyin and copyout for DIOCXBEGIN. OK bluhm@ OK sashan@ Reported-by: syzbot+b22ec16c5bf937578937@syzkaller.appspotmail.com
assert "next != NULL && next->start <= entry->end" failed in uvm_fault.c (4) C 9 962d 976d 3/3 961d f77c87828076 Replace KASSERT in uvm_fault_unwire_locked() with code that handles the case where not all pages are wired. The KASSERT can be triggered in multi-threaded applications when a thread calling munmap(2) races another thread that invokes sysctl(2). Properly written code shouldn't do this, but making the kernel crash in this case is a bit harsh.
openbsd build error (17) 2 969d 969d 3/3 968d Put call to vmx_remote_vmclear() under #ifdef MULTIPROCESSOR to unbreak build of amd64 GENERIC
uvm_fault: igmp_leavegroup (3) 37 968d 1060d 3/3 968d a134c703e536 if_detach() does if_remove(ifp); NET_LOCK(); rti_delete(). New igmp groups may join while sleeping in interface destruction. In this case if_get() in igmp_joingroup() fails and rti_fill() is not called. Then inm->inm_rti may be NULL. This is the condition when syzkaller crashes in igmp_leavegroup(). Pass the ifp the current CPU is already holding down to igmp_joingroup() and igmp_leavegroup() to avoid half constructed igmp groups. Calling if_get() in caller and callee makes no sense anyway. Reported-by: syzbot+146823a676b7bea83649@syzkaller.appspotmail.com OK denis@
openbsd boot error: uvm_fault 9 973d 973d 3/3 973d 475618162a2c Revert previous. Breaks probing native IDE devices.
multicore boot error: uvm_fault 21 973d 973d 3/3 973d 475618162a2c Revert previous. Breaks probing native IDE devices.
panic:p a anciqc:uikerrinngel dbialgocnkoastbliec a s s e r t i o n "! _k er neslle_lepo lcokc_khe l dw ( )i 1 975d 974d 3/3 973d d25fea59a0de For raw IP packets rip_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. syzbot+ebe3f03a472fecf5e42e@syzkaller.appspotmail.com OK claudio@
panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock (6) C 80 974d 974d 3/3 973d 2be5be2c1f9e For raw IPv6 packets rip6_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw6 table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. Reported-by: syzbot+5b2679ee9be0895d26f9@syzkaller.appspotmail.com OK claudio@
panic: apcaqnuiicr:in g b l o kckearbnelle d isalgeneops t ic a s s leorctkio n " w!_iktehr nselp_inlolocckk_ 1 975d 974d 3/3 973d d25fea59a0de For raw IP packets rip_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. syzbot+ebe3f03a472fecf5e42e@syzkaller.appspotmail.com OK claudio@
panic: acquiring blockable sleep lock with spinlock or critical section held (pkanerinc:e l _l o c kke)r &nkeerl ndiea 1 975d 974d 3/3 973d d25fea59a0de For raw IP packets rip_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. syzbot+ebe3f03a472fecf5e42e@syzkaller.appspotmail.com OK claudio@
panic: apcaquniirci: ng bkloerckneabll de i a g n o st ic a s s er ti o n " ! _ ke r n e l_ l oc k _ h sel 1 974d 974d 3/3 973d 2be5be2c1f9e For raw IPv6 packets rip6_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw6 table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. Reported-by: syzbot+5b2679ee9be0895d26f9@syzkaller.appspotmail.com OK claudio@
panic: acquiring blockable sleep lock with spinlock or critical section held (kernelp_alonicck): &kkerernnelel d_ilao 1 975d 974d 3/3 973d d25fea59a0de For raw IP packets rip_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. syzbot+ebe3f03a472fecf5e42e@syzkaller.appspotmail.com OK claudio@
panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock (5) C 104 974d never 3/3 974d d25fea59a0de For raw IP packets rip_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. syzbot+ebe3f03a472fecf5e42e@syzkaller.appspotmail.com OK claudio@
panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock (4) C 249 975d 976d 3/3 975d 63abc0ec39b5 For multicast and broadcast packets udp_input() traverses the loop of all UDP PCBs. From there it calls udp_sbappend() while holding the UDP table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. Reported-by: syzbot+7596cb96fb9f3c9d6f4f@syzkaller.appspotmail.com OK sashan@
witness: reversal: vmmaplk fdlock syz 22 984d 985d 3/3 982d 447db83cf4f0 Revert holding a read lock on the map while copying out data during sysctl(2).
witness: exclusive lock of (rwlock) vmmaplk while share locked C 9 985d 985d 3/3 982d 447db83cf4f0 Revert holding a read lock on the map while copying out data during sysctl(2).
witness: reversal: netlock vmmaplk C 166 984d 985d 3/3 982d 447db83cf4f0 Revert holding a read lock on the map while copying out data during sysctl(2).
panic: kmmaplk: lock not shared C 15 985d 985d 3/3 984d 447db83cf4f0 Revert holding a read lock on the map while copying out data during sysctl(2).
assert "next != NULL && next->start <= entry->end" failed in uvm_fault.c (3) syz 11 985d 1001d 3/3 985d 5f69141a284a Hold a read lock on the map while copying out data during a sysctl(2) call to prevent another thread from unmapping the memory and triggering an assertion or even corrupting random physical memory pages.
uvm_fault: socreate C 106 999d 1000d 3/3 999d 532245610f13 Reported-by: syzbot+1b5b209ce506db4d411d@syzkaller.appspotmail.com Revert the pr_usrreqs move: syzkaller found a NULL pointer deref and I won't be available to monitor for followup issues for a bit
assert "sc->sc_dev == NUM" failed in if_tun.c (2) 1 1006d 1006d 3/3 999d 1c9104c31d3f have another go at fixing assert "sc->sc_dev == NUM" failed.
assert "m->m_pkthdr.pf.prio <= IFQ_MAXPRIO" failed in ifq.c syz 2 1015d 1015d 3/3 1009d 2960c8affbaf check pf rule "set prio" values consistently.
assert "sc->sc_dev == NUM" failed in if_tun.c 24 1010d 1042d 3/3 1009d 156bbf72d5e4 prevent (re)opening of tun/tap interfaces that are being destroyed.
assert "len >= NUM && !M_READONLY(m)" failed in uipc_mbuf.c syz 153 1011d 1020d 3/3 1011d 4be097b86868 The length value in bpf_movein() is casted to from size_t to u_int and then rounded before checking. Put the same check before the calculations to avoid overflow. Reported-by: syzbot+6f29d23eca959c5a9705@syzkaller.appspotmail.com OK claudio@
kernel: integer divide fault trap, code=NUM (2) C 8 1016d 1019d 3/3 1015d 43496f5abc1b let pfattach() to also initialize pf_default_rule_new to avoid div-by-zero in pf_purge()
panic: unhandled af (4) syz 11 1034d 1063d 3/3 1031d 035d4f5430cb An af-to pf rule must have an address family naf to use after translation. Make stricter sanity checks in pf ioctl to avoid later crashes during packet processing. Reported-by: syzbot+0ef9190e7d0195496d0d@syzkaller.appspotmail.com OK sashan@
uvm_fault: x86_ipi_db (7) 4 1057d 1057d 3/3 1056d 7945134bbda7 Use a distinct variable while iterating the list of existing devices.
uvm_fault: pppacopen C 92 1057d 1057d 3/3 1056d 7945134bbda7 Use a distinct variable while iterating the list of existing devices.
assert "TAILQ_EMPTY(&ifp->if_addrhooks)" failed in if.c (2) 1 1059d 1059d 3/3 1057d 188a0a692db5 Prevent concurrent access to incomplete or dying `sc' caused by sleep points in pppacopen() and pppacclose() paths. Use the same "sc_ready" logic we use for 'pppx_if' structure.
panic: free: size too small NUM <= NUM / NUM (ADDR) type devbuf 1 1060d 1060d 3/3 1057d 61c8c0f0fd3e Prevent a double free by assigning the new keymap and corresponding size after the allocation and initialization is done. Otherwise, a race is possible if malloc ends up sleeping.
SYZFAIL: ioctl remote attach failed (3) 13 1058d 1063d 3/3 1057d 982627fcf222 Do not allow send/receive of kcov descriptors as the file descriptor can be kept alive longer than expected causing syzkaller to no longer being able to enable remote coverage.
assert "(rule != NULL) && (rule->ruleset != NULL)" failed in pf_ioctl.c C 7 1061d 1604d 3/3 1060d 5a50f165b8ad DIOCHANGERRULE ioctl must set pointer to ruleset in rule it inserts.
witness: userret: ioctl (3) syz 2 1064d 1064d 3/3 1064d 41a45098bac2 Disk lock was held when returning to userland. Add a missing unlock in vnd ioctl error path. Reported-by: syzbot+6dde3fda33074a256318@syzkaller.appspotmail.com OK jsg@ anton@
uvm_fault: sysctl_diskinit 1 1070d 1070d 3/3 1064d 278923c07fda While malloc sleeps, the disk list could change during sysctl. Then allocated memory could be too short for the list of disks. Retry allocating enough space until it did not change. The disk list and duid memory are protected by kernel lock. Use asserts to mark this explicitly. Reported-by: syzbot+807423f6868bbfb836bc@syzkaller.appspotmail.com OK anton@ mpi@
uvm_fault: pfsync_state_import C 10 1552d 1621d 3/3 1065d d13e571b26fd Remove ptr_array from struct pf_ruleset
panic: uvm_fault_unwire_locked: address not in map (3) 1 1067d 1067d 3/3 1065d 65315d4d4359 Fix a typo in mlock(2) error path triggering a double-free.
panic: vndioctl: null vp C 3 1070d 1072d 3/3 1066d 4d2db379fd33 Ensure that the disk has been initialized after acquiring the lock and not before as we might end up sleeping while acquiring the lock, introducing a potential race.
panic: malloc: allocation too large, type = NUM, size = ADDR C 3 1072d 1073d 3/3 1066d 0b7f5aec6317 Let malloc return an error as opposed of panicking when sysctl kern.shminfo.shmseg is set to something ridiculously large.
openbsd build error (15) 37 1067d 1129d 3/3 1066d revert vnode: remove VLOCKSWORK and check locking when vop_islocked != nullop (both kernel and userland bits)
assert "suser(curproc) == NUM" failed in dt_dev.c C 7 1066d 1067d 3/3 1066d cf997a482905 Remove useless suser assert from dt(4). The ioctl(2) path checks the user anyway and close(2) may crash after setuid(2). Reported-by: syzbot+90e094f33d329fb2c3ab@syzkaller.appspotmail.com OK deraadt@
uvm_fault: uvm_fault_lower C 583 1067d 1071d 3/3 1067d f08b8e936de9 Do not try to unlock a NULL object.
kernel: integer divide fault trap, code=NUM syz 2 1080d 1080d 3/3 1071d 38bfd041cb0f fix zero division found by syzkaller. The sanity checks in pf(4) ioctls are not powerful enough to detect invalid port ranges (or even invalid rules). syzkaller does not use pfctl(8), it uses ioctl(2) to pass some random chunk of memory as a rule to pf(4). Fix adds explicit check for 0 divider to pf_get_transaddr(). It should make syzkaller happy without disturbing anyone else.
uvm_fault: igmp_leavegroup (2) 1 1074d 1074d 3/3 1071d 5af2eee02794 Syzkaller found a dereference in igmp_leavegroup() where inm->inm_rti is NULL. It should be set in rti_fill(), but is not if malloc(9) fails. There is no rollback after malloc failure so the field stays uninitialized. The code is only called from ioctl, setsockopt or a task. Malloc should wait instead of failing, otherwise syscalls would be unreliable. While there also put an M_WAIT in the init code. During init malloc must not fail. OK mvs@ Reported-by: syzbot+e22326057ccf34908d78@syzkaller.appspotmail.com
uvm_fault: nd6_dad_duplicated (2) 76 1073d 1079d 3/3 1073d ce9bd2eccc20 nd6_dad_ns_input() could trigger a NULL deref in nd6_dad_duplicated(). It checks dp in two of three places. One check got lost in revision 1.83. Do a dp == NULL once at the beginning. OK jsg@ Reported-by: syzbot+88c0ce914a0b10b7e1c8@syzkaller.appspotmail.com
witness: userret: ioctl (2) 1 1080d 1080d 3/3 1079d aa5628258068 Add missing kernel unlock in error path.
panic: rw_enter: dklk locking against myself C 6 1142d 1170d 3/3 1138d placing the same vnd underneath a vnd (with VNDIOCSET) is a lock violation, but other circumstances are also bad, so let's block all vnd on top of vnd. While here, fix some toctou multiple-copyin of the path, and restructure the ioctl defer all softc updates to the end. ok mpi
multicore test error: timed out (2) 66 1151d 1154d 3/3 1151d 11ad9ee57f54 regen
openbsd build error (14) 2 1154d 1154d 3/3 1151d 11ad9ee57f54 regen
openbsd test error: timed out (2) 33 1151d 1154d 3/3 1151d 11ad9ee57f54 regen
multicore build error (13) 3 1154d 1154d 3/3 1151d 11ad9ee57f54 regen
assert "_kernel_lock_held()" failed in uvm_vnode.c 4 1177d 1177d 3/3 1170d 8e114673a836 vmm(4): grab kernel lock before vmspace init
panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock (3) C 2 1173d 1176d 3/3 1170d 8e114673a836 vmm(4): grab kernel lock before vmspace init
assert "_kernel_lock_held()" failed in uvm_device.c 7 1176d 1177d 3/3 1170d 8e114673a836 vmm(4): grab kernel lock before vmspace init
uvm_fault: rtm_output C 14 1171d 1171d 3/3 1170d d2084f835172 Fix NULL pointer dereference introduced by previous commit.
panic: vcpulock: lock not held 1 1177d 1177d 3/3 1172d 5f3d69798ad5 vmm(4): fix vcpu locking issues reported by syzbot
panic: lock (rwlock) vcpulock not locked C 1 1177d 1177d 3/3 1172d 5f3d69798ad5 vmm(4): fix vcpu locking issues reported by syzbot
panic: rw_enter: vcpulock locking against myself 1 1176d 1176d 3/3 1172d 5f3d69798ad5 vmm(4): fix vcpu locking issues reported by syzbot
assert "_kernel_lock_held()" failed in uvm_map.c C 11 1176d 1177d 3/3 1174d 8e114673a836 vmm(4): grab kernel lock before vmspace init
panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock (2) C 152 1177d 1898d 3/3 1177d 1be9dae600aa Prevent lock ordering issue by raising ipl level of vcpu_pool to IPL_MPFLOOR.
panic: mutex ADDR not held in knote_dequeue C 24 1259d 1259d 3/3 1259d baa47be05351 Remember to lock kqueue mutex in filt_timermodify().
witness: reversal: lock order data missing C 667 1288d 1358d 3/3 1287d 8b594b45f4b5 Move ktrfds() below fdpunlock(). This fixes lock order issue between vn_lock(9) and fdplock().
panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) solock C 4 1304d 1305d 3/3 1304d Revert per-socket `so_lock' rwlock(9) and use it to protect routing (PF_ROUTE) sockets. There is a locking issue with timeouts that needs to be fixed. Requested by deraadt@
SYZFAIL: tun: can't open device syz 4 1358d 1358d 3/3 1352d 43dfcaac64e4 Issuing FIOSETOWN and TIOCSPGRP ioctl commands on a tun(4) device leaks device references causing a hang while trying to remove the same interface since the reference count will never reach zero. Instead of returning, break out of the switch in order to ensure that tun_put() gets called.
assert "frag->fr_firstoff[index] != NULL" failed in pf_norm.c syz 4 1370d 1389d 3/3 1367d be7274bff2cd When cutting of the head of an overlapping fragment during pf reassembly, reinsert the fragment into the lookup table with correct index. Reported-by: syzbot+d043455a5346f726f1c4@syzkaller.appspotmail.com OK claudio@
kernel: protection fault trap, code=0 (8) syz 1348 1380d 1569d 3/3 1379d 44a45654aa78 Interface group names must fit into IFNAMSIZ and be unique. But the kernel made the unique check before trunkating with strlcpy(). So there could be two interface groups with the same name. The kif is created by a name lookup. The trunkated names are equal, so there was only one kif owned by both groups. When the groups got destroyed, the single kif was removed twice from the RB tree. Check length of group name before doing the unique check. The empty group name was allowed and is now invalid. Reported-by: syzbot+f47e8296ebd559f9bbff@syzkaller.appspotmail.com OK deraadt@ gnezdo@ anton@ mvs@ claudio@
panic: rw_enter: pf_state_lock locking against myself C 8 1380d 1380d 3/3 1380d d7220220b7ed pfsync_state_import() must not be called with the pf state lock held, since the actual modification of the state table is done by a call to pf_state_insert(), which takes the pf state lock itself. Other calls to pfsync_state_import() also only have the pf lock.
panic: vrele: v_writecount != 0 (2) C 1955 1385d 1386d 3/3 1385d df61468f8652 Revert previous commit. The vnode returned by ptm_vn_open() is open and can not simply be vrele()-ed on error. The code currently depends on closef() to do the cleanup.
assert "TAILQ_EMPTY(&kq->kq_head)" failed in kern_event.c C 2 1395d 1395d 3/3 1394d 715db9d67ba3 kqueue: Fix termination assert
uvm_fault: pf_addr_compare C 347 1400d 1400d 3/3 1400d c34fe1b3cf88 An invalid packet may not have set src and dst in packet descriptor. Add a NULL check to prevent crash in pflog(4) introduced in previous commit. Reported-by: syzbot+c6d2f2ad34b822bce98a@syzkaller.appspotmail.com
uvm_fault: m_copyback 69 1418d 1566d 3/3 1400d 2cbebc019f52 pflog(4) tried to log the translated packet with rdr-to, nat-to, and af-to addresses and ports applied. Therefore it created a mbuf chain on the stack with a partial copy. This is too complicated for IP options, extension header, NAT46 af-to, and fragmented mbuf chains. It even caused a crash in syzkaller. Usually the length checks in pf_setup_pdesc() rejected the faked mbuf and the goto copy logged the packet unmodified. Remove the pflog_mtap() function and call bpf_mtap_hdr() directly. As the old buggy code was bypassed in most cases, tcpdump(8) output of pflog does not change. Uncondionally log the unmodified packet. Reported-by: syzbot+947e89e06ac3fec187d0@syzkaller.appspotmail.com OK sashan@
kernel: double fault trap, code=0 (4) C 493 1425d 1682d 3/3 1411d c11d76984715 Syzkaller has found a stack overflow in socket splicing. Broadcast packets were resent through simplex broadcast delivery and socket splicing. Although there is an M_LOOP check in somove(9), it did not take effect. if_input_local() cleared the M_BCAST and M_MCAST flags with m_resethdr(). As if_input_local() is used for broadcast and multicast delivery, it was a mistake to delete them. Keep the M_BCAST and M_MCAST mbuf flags when packets are reinjected into the network stack. Reported-by: syzbot+a43ace363f1b663238f8@syzkaller.appspotmail.com OK anton@; discussed with claudio@
kernel: integer divide fault trap, code=0 syz 4 1598d 1627d 3/3 1435d 39c2a1337a94 Reject rules with invalid port ranges
openbsd test error: uvm_fault: spllower 6 1449d 1449d 3/3 1442d 3ba77c9295b2 Revert previous extension of the SCHED_LOCK(), the state isn't passed down.
multicore test error: uvm_fault: spllower 12 1449d 1449d 3/3 1442d 3ba77c9295b2 Revert previous extension of the SCHED_LOCK(), the state isn't passed down.
uvm_fault: wsevent_fini (3) C 2 1448d 1448d 3/3 1445d 996a5b4d63fa Fix yet another wscons race. In the same subsystem, the following properties must always hold true:
no output from test machine (6) C 2779 1464d 1486d 3/3 1464d 0124df67671a Fix handling of MSG_PEEK in soreceive() for the case where an empty mbuf is encountered in a seqpacket socket.
no output from test machine (5) C 49467 1486d 1584d 3/3 1486d d6d1940044d6 Fix a deadlock between uvn_io() and uvn_flush(). While faulting on a page backed by a vnode, uvn_io() will end up being called in order to populate newly allocated pages using I/O on the backing vnode. Before performing the I/O, newly allocated pages are flagged as busy by uvn_get(), that is before uvn_io() tries to lock the vnode. Such pages could then end up being flushed by uvn_flush() which already has acquired the vnode lock. Since such pages are flagged as busy, uvn_flush() will wait for them to be flagged as not busy. This will never happens as uvn_io() cannot make progress until the vnode lock is released.
witness: userret: ioctl C 3 1491d 1491d 3/3 1490d 610c242e11d3 - missing NET_UNLOCK() in pf_ioctl.c error path
panic: spl assertion failure in yield C 12 1619d 1636d 3/3 1491d - move NET_LOCK() further down in pf_ioctl.c. Also move memory allocations outside of NET_LOCK()/PF_LOCK() scope in easy spots.
openbsd build error (11) 44 1492d 1497d 3/3 1492d a524e041107f timeout(9): fix compilation under NKCOV
multicore build error (8) 88 1492d 1497d 3/3 1492d a524e041107f timeout(9): fix compilation under NKCOV
panic: malloc: allocation too large, type = 98, size = ADDR C 2 1509d 1509d 3/3 1508d Recent changes for PROT_NONE pages to not count against resource limits, failed to note this also guarded against heavy amap allocations in the MAP_SHARED case. Bring back the checks for MAP_SHARED from semarie, ok kettenis https://syzkaller.appspot.com/bug?extid=d80de26a8db6c009d060
openbsd build error (10) 3 1530d 1530d 3/3 1528d Unbreak tree. Instead of passing struct process to siginit() just pass the struct sigacts since that is the only thing that is modified by siginit.
multicore build error (7) 5 1530d 1530d 3/3 1528d Unbreak tree. Instead of passing struct process to siginit() just pass the struct sigacts since that is the only thing that is modified by siginit.
panic: syn_cache_insert: cacheoverflow: impossible (2) C 6 1565d 1610d 3/3 1542d 7c72bba2fa26 Convert tcp_sysctl to sysctl_bounded_args
assert "curproc->p_kd == NULL" failed in kcov.c (2) 1 1555d 1555d 3/3 1542d ece33e2f6ca2 Before clearing the kcov descriptor associated with a thread make sure no other thread is currently within a remote section. Otherwise, the remote subsystem could end up in a broken state where it doesn't reset the necessary bits upon leaving the remote section.
assert "curproc->p_kd == NULL" failed in kcov.c 2 1559d 1561d 3/3 1559d 2fa3abdda1a4 When detaching common remote coverage, do not clear any fields. Instead, let kr_free() do the work. Otherwise a thread currently inside a remote section could end up not decrementing the number of ongoing sections while exiting the same remote section.
uvm_fault: pfi_address_add syz 1359 1580d 1636d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
pool: free list modified: phpool 1 1611d 1611d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
panic: sbdrop syz 183 1571d 1870d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
uvm_fault: soreceive syz 240 1579d 1845d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
panic: ifa_update_broadaddr does not support dynamic length (2) 13 1574d 1723d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
uvm_fault: in6ifa_ifpforlinklocal 1 1625d 1625d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
uvm_fault: pool_do_put (2) syz 53 1581d 1824d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
kernel: protection fault trap, code=0 (7) syz 774692 1569d 1813d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
uvm_fault: in_delmulti syz 375431 1569d 1856d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
panic: tcp_output: template len != hdrlen - optlen syz 487 1571d 1883d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
soreceive 1a syz 510 1572d 1728d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
uvm_fault (2) syz 1 1622d 1622d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
pool: cpu free list modified: mbufpl syz 15863 1569d 1856d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
pool: free list modified: art_heap4 (2) 4 1611d 1642d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
soreceive 3 syz 755 1569d 1728d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
uvm_fault: vio_rxeof syz 15700 1579d 1891d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
uvm_fault: ifa_update_broadaddr 3275 1579d 1824d 3/3 1569d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
multicore build error (6) 4 1575d 1588d 3/3 1572d Revert r1.170. dlg and jmatthew simultaneously fixed this the correct way.
openbsd build error (9) 1 1588d 1588d 3/3 1572d Revert r1.170. dlg and jmatthew simultaneously fixed this the correct way.
uvm_fault: wsevent_fini (2) 1 1596d 1596d 3/3 1575d 25f2901d1c23 Fix yet another panic in which wsevent_fini() ends up being called with NULL. This one is a race caused by clearing the me_evp member before calling routines that could end up sleeping.
no output from test machine (3) C 25293 1590d 1605d 3/3 1590d A pty write containing VDISCARD, VREPRINT, or various retyping cases of VERASE would perform (sometimes irrelevant) compute in the kernel which can be heavy (especially with our insufficient tty subsystem locking). Use tsleep_nsec for 1 tick in such circumstances to yield cpu, and also bring interruptability to ptcwrite() https://syzkaller.appspot.com/bug?extid=462539bc18fef8fc26cc ok kettenis millert, discussions with greg and anton
panic: unhandled af (2) C 22 1608d 1634d 3/3 1607d 38e8113e1d44 state import should accept AF_INET/AF_INET6 only
panic: syn_cache_insert: bucketoverflow: impossible C 5 1620d 1638d 3/3 1616d 2b10bfc1e665 Refuse to set 0 or a negative value for net.inet.tcp.synbucketlimit.
panic: syn_cache_insert: cacheoverflow: impossible 5 1616d 1635d 3/3 1616d 2b10bfc1e665 Refuse to set 0 or a negative value for net.inet.tcp.synbucketlimit.
no output from test machine C 551400 1658d 2233d 3/3 1658d 7bb4371dccb1 Do not wait indefinitely for flushing when closing a tty.
panic: m_copydata: null mbuf C 396 1662d 1849d 3/3 1659d 574b3a4fa98d Do sanity checks in ip6_pullexthdr() preventing a panic in m_copydata(9).
assert "!ISSET(rt->rt_flags, RTF_LOCAL)" failed in nd6.c 1 1725d 1725d 3/3 1673d 8e6c5245c1d8 Never update the ND entry (cache) corresponding to a RTF_LOCAL route.
uvm_fault: pfi_dynaddr_remove C 17 1782d 1787d 3/3 1676d 3d97bff14298 fix insufficient input sanitization in pf_rulecopyin() and pf_pool_copyin()
uvm_fault: pfr_detach_table C 12 1782d 1785d 3/3 1676d 3d97bff14298 fix insufficient input sanitization in pf_rulecopyin() and pf_pool_copyin()
openbsd build error (8) 2 1681d 1681d 3/3 1681d 20c8eb7cf336 Add bse(4) device to unbreak build.
multicore build error (5) 4 1681d 1681d 3/3 1681d 20c8eb7cf336 Add bse(4) device to unbreak build.
panic: rw_enter: netlock locking against myself syz 2 1687d 1687d 3/3 1683d 27427a72e313 In sosplice(), temporarily release the socket lock before calling FRELE() as the last reference could be dropped which in turn will cause soclose() to be called where the socket lock is unconditionally acquired. Note that this is only a problem for sockets protected by the non-recursive NET_LOCK() right now.
assert "p == curproc" failed in vfs_vops.c C 187 1696d 1696d 3/3 1693d fc5a743df3a9 Revert previous, syzkaller found a way to trigger the KASSERT().
uvm_fault: strlcpy (2) 1 1704d 1704d 3/3 1697d 9fcf6ed4d02d Prevent out of bounds read in strlcpy due to vcp_name not being NUL-terminated.
panic: vputonfreelist: lock count is not zero C 2 1728d 1728d 3/3 1700d 2a9890d8c8d9 Relax the lockcount assertion in vputonfreelist(). Back when I fixed several problems with the vnode exclusive lock implementation, I overlooked the fact that a vnode can be in a state where the usecount is zero while the holdcount still being positive. There could still be threads waiting on the vnode lock in uvn_io() as long as the holdcount is positive.
uvm_fault: wsevent_fini 1 1708d 1708d 3/3 1703d be78d62e13f6 Ensure that me_evp is still NULL before assignment during open of wscons devices. This condition is checked early on during open but since the same routine could end up sleeping before assigning me_evp, a race against adding the same wscons device to a wsmux could be lost. This in turn can cause a NULL deference during close.
kernel: double fault trap, code=0 (3) C 69 1715d 1724d 3/3 1715d aa1987fe7ce4 Fix unlimited recursion caused by local outbound bcast/mcast packet sent via spliced socket.
pool: free list modified: aobjpl C 3 1812d 1825d 3/3 1722d c5a231fb6c1e Grab a reference for the shared memory segment before calling uvm_map() as the same function could end up putting the thread to sleep. Allowing another thread to free the shared memory segment, which in turns causes a use-after-free.
openbsd boot error: uvm_fault: softclock 33 1724d 1725d 3/3 1723d previous commit accidentally aliased two unique timeouts hit by millert
multicore boot error: uvm_fault: softclock 66 1724d 1725d 3/3 1723d previous commit accidentally aliased two unique timeouts hit by millert
kqueue: knote !QUEUED syz 8 1739d 1775d 3/3 1739d 8c4786361ce1 Raise SPL when updating kn_status. Otherwise the field can become inconsistent if knote_acquire() or knote_release() is preempted by an interrupt that modifies the same knote.
panic: unhandled af C 21 1782d 1784d 3/3 1778d 4804479228fb Check address family of pf ioctl(2) DIOCNATLOOK parameter at kernel entry instead of calling panic() due to unhandled af. Reported-by: syzbot+92be143c2dd1746cf2af@syzkaller.appspotmail.com from Benjamin Baier
panic: attempt to execute user address syz 1539 1788d 1882d 3/3 1784d f30ff743e528 Fix some races in kqueue_register().
witness: reversal: vmmaplk inode C 103124 1800d 2127d 3/3 1799d Use separate rwlock initializations for userland ("vmspace") and kernel maps. This lets witness know that these really are different classes avoiding false positives when detecting lock order reversals.
kernel: protection fault trap, code=0 (6) C 55024 1813d 1898d 3/3 1813d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
panic: uvm_mapent_clone: no space in map for entry in empty map C 12 1814d 1820d 3/3 1814d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
panic: amap_pp_adjref: negative reference count C 98 1824d 1876d 3/3 1814d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
uvm_fault: amap_pp_adjref 1 1876d 1876d 3/3 1814d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
uvm_fault: uvm_unmap_remove (2) C 7836 1814d 1897d 3/3 1814d 3c82c0b2df98 Fix uvm_unmap_remove panic when tearing down VMs.
panic: uvmspace_fork: no space in map for entry in empty map C 450 1822d 1876d 3/3 1814d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
assert "TAILQ_EMPTY(&ifp->if_addrhooks)" failed in if.c 2 1834d 1836d 3/3 1829d 9e254176dfa1 take care to avoid a race when creating the same interface.
panic: ifa_update_broadaddr does not support dynamic length syz 6780 1840d 1899d 3/3 1840d b36fd3da6fde Do propper kernel input validation for in_control() ioctl(2) SIOCGIFADDR, SIOCGIFNETMASK, SIOCGIFDSTADDR, SIOCGIFBRDADDR, SIOCSIFADDR, SIOCSIFNETMASK, SIOCSIFDSTADDR, and SIOCSIFBRDADDR. Name in_ioctl_set_ifaddr() consistently. Use in_sa2sin() to validate inet address. Combine if_addrlist loops and add comment. Although netmask is not a inet address, length must be valid. Reported-by: syzbot+5fc6da002fc4e8d994be@syzkaller.appspotmail.com OK visa@
pool: free list modified: shmpl C 22 1996d 2091d 3/3 1850d d13730a27993 Copy in the user-supplied buffer in shmctl(2) before looking up the shared memory segment. Otherwise, if copyin ends up sleeping it allows another thread to remove the same segment leading to a use-after-free.
malloc: free list modified: devbuf syz 5 1857d 1863d 3/3 1857d put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
uvm_fault: kqueue_scan 1 1879d 1879d 3/3 1857d put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
uvm_fault: witness_checkorder syz 2 1859d 1859d 3/3 1857d put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
uvm_fault: filt_bpfrdetach syz 1 1857d 1857d 3/3 1857d put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
uvm_fault: bpfioctl C 14 1865d 1948d 3/3 1857d put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
assert "ps->ps_uvncount == 0" failed in kern_unveil.c syz 226 1884d 2152d 3/3 1877d a239dbafd306 Only increment the ps_uvncount counter when a path is successfully added to the corresponding red-black tree; meaning the path was not already present in the tree. This prevents an assertion to trigger in unveil_destroy() later on when the process exits.
assert "ln != NULL" failed in nd6.c 1 1903d 1903d 3/3 1880d bdbfbec5cea8 Do more sanity checks when accepting socket addresses in routing messages from user land. Inspect length field early in rtm_xaddrs(). Strings must be NUL terminated. The socket address type and length depend on the routing message type. Currently checks are not super strict to avoid too much user land fallout. OK mpi@ Reported-by: syzbot+638dbf7851da8e255af5@syzkaller.appspotmail.com
assert "ifa == rt->rt_ifa" failed in nd6.c 9 1880d 1881d 3/3 1880d bdbfbec5cea8 Do more sanity checks when accepting socket addresses in routing messages from user land. Inspect length field early in rtm_xaddrs(). Strings must be NUL terminated. The socket address type and length depend on the routing message type. Currently checks are not super strict to avoid too much user land fallout. OK mpi@ Reported-by: syzbot+638dbf7851da8e255af5@syzkaller.appspotmail.com
uvm_fault: strlcpy 18 1887d 2008d 3/3 1885d bdbfbec5cea8 Do more sanity checks when accepting socket addresses in routing messages from user land. Inspect length field early in rtm_xaddrs(). Strings must be NUL terminated. The socket address type and length depend on the routing message type. Currently checks are not super strict to avoid too much user land fallout. OK mpi@ Reported-by: syzbot+638dbf7851da8e255af5@syzkaller.appspotmail.com
uvm_fault: uvm_unmap_remove C 780 1897d 1916d 3/3 1897d 00ba8250173b vm_teardown() must be serialized since it modifies the global vmm_softc structure. Therefore grab the appropriate lock before calling the same function. This issue has been known for a while and reported before but lacking a way to easily reproduce it; until syzkaller came up with a reproducer.
panic: malloc: allocation too large, type = 2, size = ADDR (2) C 16842 1898d 1916d 3/3 1898d 225e50e8a961 Do not decrement the number of VMs counter twice in one of vm_create() error paths. If creation of the first VM fails, the counter will wrap around to a huge value. The same value could later be passed to malloc() through vm_get_info() causing a panic.
kernel: protection fault trap, code=0 (5) C 607 1904d 1978d 3/3 1904d a42056240bd9 Fix a route use after free in IPv6 multicast route. Move the mrt6_mcast6_del() out of the rtable_walk(). This avoids recursion to prevent stack overflow. Also it allows freeing the route outside of the walk. Now mrt6_mcast_del() frees the route only when it is deleted from the routing table. If that fails, it must not be freed. After the route is returned by mf6c_find(), it is reference counted. Then we need a rtfree(), but not in the other case. Name mrt6_mcast_add() and mrt6_mcast_del() consistently. Move rt_timer_remove_all() into mrt6_mcast_del(). Reported-by: syzbot+af7d510593d74c825960@syzkaller.appspotmail.com OK mpi@
panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock 33 1913d 1917d 3/3 1912d d3f3cb99fa83 Do not use the flow of the first fragment to store ECN information. Handle the ECN in the fragment queue. Reported-by: syzbot+0aa80b25e9041001cac8@syzkaller.appspotmail.com fix from FreeBSD; OK claudio@
uvm_fault: frag6_input 24 1913d 1917d 3/3 1912d d3f3cb99fa83 Do not use the flow of the first fragment to store ECN information. Handle the ECN in the fragment queue. Reported-by: syzbot+0aa80b25e9041001cac8@syzkaller.appspotmail.com fix from FreeBSD; OK claudio@
witness: userret: returning with the following locks held: C 315 1913d 2123d 3/3 1913d b808994cf339 When a thread tries to exclusively lock a vnode, the same thread must ensure that any other thread currently trying to acquire the underlying vnode lock has observed that the same vnode is about to be exclusively locked. Such threads must then sleep until the exclusive lock has been released and then try to acquire the lock again. Otherwise, exclusive access to the vnode cannot be guaranteed.
panic: vput: ref cnt C 6 1926d 1928d 3/3 1925d d627fa5cc364 Serialize access to the vnode pointers associated with acct(2) system accounting. Prevents a race where the acct thread and the acct(2) syscall both tries to close a vnode.
assert "timo || _kernel_lock_held()" failed in kern_synch.c C 2 1927d 1927d 3/3 1927d 93e05fce3bab Revert unlock of lseek(2) since vn_lock() could end up calling tsleep() which is not allowed without holding the kernel lock. Otherwise, wakeups could be lost.
panic: vrele: v_writecount != 0 C 51 1935d 1940d 3/3 1934d 3e253b4759f0 Favor vn_close() in the error path of diskmapioctl() since side-effects caused by calling vn_open() with write permissions must be reverted. Otherwise, the vfs subsystem could panic while releasing the last vnode reference if the writecount is still positive.
panic: vput: v_writecount != 0 (2) C 112 1935d 1940d 3/3 1934d 3e253b4759f0 Favor vn_close() in the error path of diskmapioctl() since side-effects caused by calling vn_open() with write permissions must be reverted. Otherwise, the vfs subsystem could panic while releasing the last vnode reference if the writecount is still positive.
assert "cpipe->pipe_buffer.cnt == 0" failed in sys_pipe.c C 8 1961d 1962d 3/3 1961d 40f8ed5eebb0 backout the unlock of pipe(2) and pipe2(2)
kernel: protection fault trap, code=0 (4) C 759 1980d 2092d 3/3 1979d cf34c7c30780 Prevent recursions by not deleting entries inside rtable_walk(9).
uvm_fault: arp_rtrequest C 79 1998d 2008d 3/3 1987d 4cb088386ee5 In arp_rtrequest and nd6_rtrequest return early if the RTF_MPLS flag is set. These mpls routes use the rt_llinfo structure to store the MPLS label and would confuse the arp and nd6 code. OK bluhm@ anton@
assert "(rt->rt_flags & RTF_MPATH) || mrt->rt_priority != prio" failed in rtable.c C 143 1998d 2012d 3/3 1987d ff10691ed095 Copy the user provided sockaddr into a normalized sockaddr in rtrequest() before adding it to the routing table. The rtable code is doing memcmp() of those rt_dest sockaddrs so it is important that they are stored in a canonical form. To do this struct domain is extended to include the sockaddr size for this address family. OK bluhm@ anton@
uvm_fault: mrt6_ioctl C 2 2008d 2008d 3/3 1996d a8f2b5c7d3d3 Add missing NULL check for the protocol control block (pcb) pointer in mrt{6,}_ioctl. Calling shutdown(2) on the socket prior to the ioctl command can cause it to be NULL.
uvm_fault: mrt_ioctl C 2 1997d 1997d 3/3 1996d a8f2b5c7d3d3 Add missing NULL check for the protocol control block (pcb) pointer in mrt{6,}_ioctl. Calling shutdown(2) on the socket prior to the ioctl command can cause it to be NULL.
uvm_fault: pckbc_start (2) syz 2 2009d 2010d 3/3 1997d bc79b6e32eb3 Prevent corruption of the pckbc command queue. If multiple synchronous commands are in flight and all corresponding threads are sleeping waiting for a response, the first command to timeout will clear the command queue. The remaining threads once awake will then try to remove a dequeued command from the queue, leading to corruption. Instead, remove commands from the queue before waking up the sleeping thread. A quirk is still needed to handle the case where tsleep() returns successfully during suspend.
assert "_kernel_lock_held()" failed in kern_event.c C 11 2028d 2030d 3/3 1998d 1be240a95e4a Removed all diagnostic, calling printf() here might create a recursion.
witness: reversal: &pr->ps_mtx &sched_lock C 141 1999d 2000d 3/3 1999d 17b25159f963 Revert to using the SCHED_LOCK() to protect time accounting.
uvm_fault: wsmux_do_ioctl (4) C 3 2013d 2037d 3/3 2010d 78fe050fe549 A problem fixed in wskbd is also present in wsmux. Repeating the previous commit message:
panic: malloc: out of space in kmem_map 97 2063d 2127d 3/3 2011d During fuzzing, one or many fuzzing processes are often stuck waiting on memory from the subproc malloc subsystem which is exhausted. Attempt to circumvent such scenarios by allocation the kcov coverage buffer using km_alloc() instead.
uvm_fault: rtm_report C 2 2036d 2036d 3/3 2020d 1b18c0494f67 Make rt_mpls_set() be more strict in what it accepts. Also ensure that the RTF_MPLS can't be toggled without rt_mpls_set() being called. While RTF_MPLS is part of RTF_FMASK it should be excluded from the flags and mask when they are applied to the route since toggling it requires a call to rt_mpls_set(). OK bluhm@
syzkaller: testing failed: failed to run ["go" "test" "-short" "./..."]: exit status 1 36 2021d 2023d 3/3 2021d fbb8d265a895 Restore previous behavior of limiting deadlock detection to posix-style locks.
multicore build error (3) 4 2025d 2025d 3/3 2024d always rearm completion queues as leaving them disarmed would lead to rx or tx completion stalling.
openbsd build error (5) 2 2025d 2025d 3/3 2024d always rearm completion queues as leaving them disarmed would lead to rx or tx completion stalling.
panic: timeout_add: to_ticks < 0 (3) 1 2048d 2048d 3/3 2036d 1af424413523 Lower the accepted upper bound for bd_rtout to INT_MAX in order to prevent passing negative values to timeout_add().
panic: mtx ADDR: locking against myself C 3 2041d 2042d 3/3 2040d vmm(4): remove a debug printf that was causing lock issues (it was being called from an IPI routine).
panic: timeout_add: to_ticks < 0 (2) syz 12 2058d 2060d 3/3 2058d bf2018479c9a Reject negative and too large timeouts passed to BIOCSRTIMEOUT. Since the timeout converted to ticks is later passed timeout_add(), it could cause a panic if the timeout is negative.
uvm_fault: rtable_satoplen (2) syz 101 2061d 2070d 3/3 2058d 575ef11475ca Add a more strict rtm_hdrlen size check. Make sure that at least struct rt_msghdr bytes are passed in. Also return a failure from rtm_xaddrs() if rti_addrs has bad flags or run out of space. Ok bluhm@
uvm_fault: memcpy C 460 2061d 2081d 3/3 2061d 575ef11475ca Add a more strict rtm_hdrlen size check. Make sure that at least struct rt_msghdr bytes are passed in. Also return a failure from rtm_xaddrs() if rti_addrs has bad flags or run out of space. Ok bluhm@
panic: malloc: allocation too large, type = 2, size = ADDR C 914 2063d 2125d 3/3 2062d fd7c80607c62 Restrict the number of allowed wsmux devices, just like wskbd and wsmouse already does. Otherwise, malloc could panic if the device minor is sufficiently large.
openbsd build error (2) 1 2067d 2067d 3/3 2066d 6baecefef8fe Tweak previous: include <sys/stdint.h> for INT64_MAX/INT64_MIN.
assert "tname->un_flags & UNVEIL_USERSET" failed in kern_unveil.c C 1447 2066d 2068d 3/3 2066d f4c23aa848ae Remove this assert, I can't do this here with UNVEIL_INSPECT added aggressively today. Hopefully post release a glorious flensing will remove UNVEIL_INSPECT anyway
uvm_fault: rtable_satoplen 158 2071d 2088d 3/3 2071d fab4809e7ec2 Make sure pointer is within bounds before dereferencing it.
witness: acquiring duplicate lock of same type: "&sc->sc_lock" C 231 2100d 2102d 3/3 2100d 1f8a38b155bf When adding a wsmux device to an existing wsmux device using ioctl(WSMUXIO_ADD_DEVICE), two distinct locks of the same type are acquired. Thus, witness will emit warning. Since acquiring two different locks of the same type is harmless in this context, relax the witness check by flagging the locks as RWL_DUPOK.
panic: timeout_add: to_ticks < 0 C 66 2100d 2105d 3/3 2100d 3cfc9cae129c Reject negative input from userland in spkrioctl(). One of the arguments are later passed to timeout_add() which panics if the given ticks are negative. While here, clamp arguments in pcppi_bell() in order to prevent overflow.
uvm_fault: pckbc_start 1 2102d 2102d 3/3 2102d 0c0bf6318018 Serialize access to the list of attached child devices belonging to a wsmux. When invoking wsevsrc_* functions on a attached child device, underlying driver can sleep; this introduces a race where another thread is able to modify the list leading to all kinds of corruptions.
uvm_fault: wsmux_detach_sc syz 10 2105d 2116d 3/3 2102d 0c0bf6318018 Serialize access to the list of attached child devices belonging to a wsmux. When invoking wsevsrc_* functions on a attached child device, underlying driver can sleep; this introduces a race where another thread is able to modify the list leading to all kinds of corruptions.
panic: vmmaplk: lock not shared C 16 2113d 2125d 3/3 2113d Always refault if relocking maps fails after IO. This fixes a regression
panic: pool_p_free: semupl free list modified: page ADDR; item addr ADDR; offset 0x0=ADDR C 5 2113d 2233d 3/3 2113d When freeing the sem_undo structure in semundo_adjust(), update the
pool: free list modified: semupl C 6 2119d 2233d 3/3 2113d When freeing the sem_undo structure in semundo_adjust(), update the
pool: double put: mbufpl 6 2179d 2180d 3/3 2113d Avoid an mbuf double free in the oob soreceive() path. In the
uvm_fault: wsmux_do_ioctl (2) C 17 2121d 2125d 3/3 2120d In wskbdclose(), use the same logic as in wskbdopen() to determine if
kernel: protection fault trap, code=0 (3) C 3 2125d 2125d 3/3 2124d Validate the user-supplied device index given to WSMUXIO_ADD_DEVICE. The same
uvm_fault: VOP_ACCESS 393 2129d 2172d 3/3 2129d namei can return a null dvp on success. check this before access.
kernel: protection fault trap, code=0 (2) syz 109 2130d 2154d 3/3 2130d Introduce a dedicated entry point data structure for file locks. This new data
panic: malformed IPv4 option passed to ip_optcopy (2) C 149 2135d 2139d 3/3 2132d Bring back the ip_pcbopts() refactor. Pad the option buffer and therefor the mbuf to the next word length as it is required by the standard. Also use the correct offset from the input mbuf. OK visa@, input & OK bluhm@
panic: uvm_fault_unwire_locked: address not in map C 2 2158d 2158d 3/3 2141d Hold a read lock on the map while doing the actual device I/O during in
assert "next != NULL && next->start <= entry->end" failed in uvm_fault.c C 2 2156d 2156d 3/3 2141d Hold a read lock on the map while doing the actual device I/O during in
panic: malformed IPv4 option passed to ip_optcopy C 10 2155d 2165d 3/3 2144d Validate the version, and all length fields of IP packets passed to a raw socket
panic: m_zero: M_READONLY C 3 2150d 2150d 3/3 2144d It is possible to call m_zero with a read-only cluster. In that case just
assert "__mp_lock_held(&sched_lock, curcpu()) == 0" failed in kern_lock.c C 17 2146d 2158d 3/3 2145d ec412da11be4 Fix unsafe use of ptsignal() in mi_switch().
uvm_fault: m_free 12 2156d 2179d 3/3 2146d 54e30ac1a804 Fix mbuf releated crashes in switch(4). They have been found by syzkaller as pool corruption panic. It is unclear which bug caused what, but it should be better now. - Check M_PKTHDR with assertion before accessing m_pkthdr. - Do not access oh_length without m_pullup(). - After checking if there is space at the end of the mbuf, don't overwrite the data at the beginning. Append the new content. - Do not set m_len and m_pkthdr.len when it is unclear whether the ofp_error header fits at all. Use m_makespace() to adjust the mbuf. Reported-by: syzbot+6efc0a9d5b700b54392e@syzkaller.appspotmail.com test akoshibe@; OK claudio@
pool: free list modified: mbufpl syz 13 2165d 2179d 3/3 2146d 54e30ac1a804 Fix mbuf releated crashes in switch(4). They have been found by syzkaller as pool corruption panic. It is unclear which bug caused what, but it should be better now. - Check M_PKTHDR with assertion before accessing m_pkthdr. - Do not access oh_length without m_pullup(). - After checking if there is space at the end of the mbuf, don't overwrite the data at the beginning. Append the new content. - Do not set m_len and m_pkthdr.len when it is unclear whether the ofp_error header fits at all. Use m_makespace() to adjust the mbuf. Reported-by: syzbot+6efc0a9d5b700b54392e@syzkaller.appspotmail.com test akoshibe@; OK claudio@
panic: pr_find_pagehead: mbufpl: incorrect page 3 2159d 2175d 3/3 2146d 54e30ac1a804 Fix mbuf releated crashes in switch(4). They have been found by syzkaller as pool corruption panic. It is unclear which bug caused what, but it should be better now. - Check M_PKTHDR with assertion before accessing m_pkthdr. - Do not access oh_length without m_pullup(). - After checking if there is space at the end of the mbuf, don't overwrite the data at the beginning. Append the new content. - Do not set m_len and m_pkthdr.len when it is unclear whether the ofp_error header fits at all. Use m_makespace() to adjust the mbuf. Reported-by: syzbot+6efc0a9d5b700b54392e@syzkaller.appspotmail.com test akoshibe@; OK claudio@
panic: pool_cache_item_magic_check: mcl64k cpu free list modified: item addr ADDR+24 ADDR!=ADDR 1 2176d 2176d 3/3 2146d 54e30ac1a804 Fix mbuf releated crashes in switch(4). They have been found by syzkaller as pool corruption panic. It is unclear which bug caused what, but it should be better now. - Check M_PKTHDR with assertion before accessing m_pkthdr. - Do not access oh_length without m_pullup(). - After checking if there is space at the end of the mbuf, don't overwrite the data at the beginning. Append the new content. - Do not set m_len and m_pkthdr.len when it is unclear whether the ofp_error header fits at all. Use m_makespace() to adjust the mbuf. Reported-by: syzbot+6efc0a9d5b700b54392e@syzkaller.appspotmail.com test akoshibe@; OK claudio@
uvm_fault: switchread 1 2174d 2174d 3/3 2146d 54e30ac1a804 Fix mbuf releated crashes in switch(4). They have been found by syzkaller as pool corruption panic. It is unclear which bug caused what, but it should be better now. - Check M_PKTHDR with assertion before accessing m_pkthdr. - Do not access oh_length without m_pullup(). - After checking if there is space at the end of the mbuf, don't overwrite the data at the beginning. Append the new content. - Do not set m_len and m_pkthdr.len when it is unclear whether the ofp_error header fits at all. Use m_makespace() to adjust the mbuf. Reported-by: syzbot+6efc0a9d5b700b54392e@syzkaller.appspotmail.com test akoshibe@; OK claudio@
uvm_fault: switchwrite syz 7 2156d 2176d 3/3 2146d 54e30ac1a804 Fix mbuf releated crashes in switch(4). They have been found by syzkaller as pool corruption panic. It is unclear which bug caused what, but it should be better now. - Check M_PKTHDR with assertion before accessing m_pkthdr. - Do not access oh_length without m_pullup(). - After checking if there is space at the end of the mbuf, don't overwrite the data at the beginning. Append the new content. - Do not set m_len and m_pkthdr.len when it is unclear whether the ofp_error header fits at all. Use m_makespace() to adjust the mbuf. Reported-by: syzbot+6efc0a9d5b700b54392e@syzkaller.appspotmail.com test akoshibe@; OK claudio@
panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr ADDR+16 0x0!=ADDR 1 2167d 2167d 3/3 2148d 54e30ac1a804 Fix mbuf releated crashes in switch(4). They have been found by syzkaller as pool corruption panic. It is unclear which bug caused what, but it should be better now. - Check M_PKTHDR with assertion before accessing m_pkthdr. - Do not access oh_length without m_pullup(). - After checking if there is space at the end of the mbuf, don't overwrite the data at the beginning. Append the new content. - Do not set m_len and m_pkthdr.len when it is unclear whether the ofp_error header fits at all. Use m_makespace() to adjust the mbuf. Reported-by: syzbot+6efc0a9d5b700b54392e@syzkaller.appspotmail.com test akoshibe@; OK claudio@
panic: pr_find_pagehead: mbufpl: page header missing C 10 2166d 2179d 3/3 2154d Fix mbuf releated crashes in switch(4). They have been found by
pool: free list modified: mcl2k C 4 2163d 2217d 3/3 2163d Replace a wrong poor mans m_trailingspace() with the real thing. The mbuf
panic: receive 3: so ADDR, so_type 1, m ADDR, m_type 6 C 18 2165d 2174d 3/3 2164d When using MSG_WAITALL, soreceive() can sleep while processing the receive buffer of a stream socket. Then a new pair of control and data mbuf can be appended to the mbuf queue. In this case, terminate the loop with a short read to prevent a panic. Userland should read the control message with the next system call. OK claudio@ deraadt@
panic: kernel diagnostic assertion "M_DATABUF(m) + M_SIZE(m) >= (m->m_data + m->m_len)" failed: file "/syzkaller/manager C 7 2174d 2180d 3/3 2164d 49729d6ed45f In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees the inpcb apart from the disconnect. Just call soisdisconnected() and clear the inp->inp_faddr since the socket is still valid after a disconnect. Problem found by syzkaller via Greg Steuck OK visa@ Fixes: Reported-by: syzbot+2cd350dfe5c96f6469f2@syzkaller.appspotmail.com Reported-by: syzbot+139ac2d7d3d60162334b@syzkaller.appspotmail.com Reported-by: syzbot+02168317bd0156c13b69@syzkaller.appspotmail.com Reported-by: syzbot+de8d2459ecf4cdc576a1@syzkaller.appspotmail.com
pool: double put: lockfpl 1 2241d 2233d 3/3 2164d Rework previous lockf fix; bluhm@ noticed a regress failure during consecutive runs. This is a second attempt in which the lockf structure is turned into a doubly linked list which makes it easier to ensure correctness during list insertion and deletion.
uvm_fault: killjobc 1 2169d 2169d 3/3 2164d When no child devices are attached to a wsmux device, make sure to return an
uvm_fault: wsmux_do_ioctl 2 2195d 2233d 3/3 2164d Utilize sigio with wscons. The old behavior of always making the process group of the process who opens the device the default recipient of sigio is removed as a side-effect of this change. Issuing ioctl(FIOSETOWN) is therefore mandatory in order to receive sigio, which is more consistent with other subsystems supporting sigio.
uvm_fault: sogetopt C 2 2182d 2182d 1/3 2179d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees
kernel: protection fault trap, code=0 C 16 2179d 2183d 1/3 2179d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees
uvm_fault: ip_ctloutput C 11 2179d 2183d 1/3 2179d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees
uvm_fault: ip_pcbopts C 6 2179d 2182d 1/3 2179d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees