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Title Repro Cause bisect Fix bisect Count Last Reported Patched Closed Patch
multicore boot error: uvm_fault (2) 12 216d 216d 3/3 13d ef9354f58d69 sync
panic: lock (rwlock) solock not locked C 33 691d 692d 3/3 16d ef9354f58d69 sync
witness: reversal: lock order data missing (3) 8192 16d 864d 3/3 16d ef9354f58d69 sync
panic: vmxon failed syz 3 105d 110d 3/3 104d ddfb6951b469 vmm: protect vmm activation with the vmm_softc rwlock.
uvm_fault: igmp_leavegroup (5) C 12 106d 107d 3/3 106d 4733ced31b52 Prevent changing interface loopback flag from userland.
panic: unix: lock not held C 2 118d 118d 3/3 112d 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 135d 135d 3/3 130d 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 143d 144d 3/3 143d c8a0ef6cb991 Validate IPv4 packet options in divert output.
assert "to->to_kclock == KCLOCK_UPTIME" failed in kern_timeout.c (3) 1 166d 166d 3/3 153d 0a34672fd384 timeout: make to_kclock validation more rigorous
kqueue: knote !ACTIVE (3) 1 173d 173d 3/3 171d 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 175d 177d 3/3 175d 4a2c3c9ecbcf In in_pcbrtentry() add missing return of in6_pcbrtentry() value.
uvm_fault: refcnt_take 1 190d 190d 3/3 189d 470ec98d6191 Backout priterator() for walking allprocess list.
protection_fault: fill_file (3) 1 199d 199d 3/3 193d 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 197d 204d 3/3 196d 66bd633ef3ce Use domain name for socket lock.
witness: reversal: pf_lock solock syz 23 197d 204d 3/3 196d 66bd633ef3ce Use domain name for socket lock.
assert "dtlookup(unit) == NULL" failed in dt_dev.c (3) 1 207d 207d 3/3 205d c57c5c683707 Prevent simultaneous dt(4) open.
assert "__mp_lock_held(&sched_lock, curcpu()) == NUM" failed in kern_lock.c (4) 1 221d 221d 3/3 220d 540e94b5c59a soreceive() must not hold mutex when calling sblock().
panic: assertwaitok: non-zero mutex count: NUM C 10 220d 221d 3/3 220d 540e94b5c59a soreceive() must not hold mutex when calling sblock().
uvm_fault: rtrequest (2) C 15 256d 256d 3/3 256d a08e228de7c0 Fix rt_setgate() error handling.
assert "!_kernel_lock_held()" failed in kern_fork.c (3) 107 270d 920d 3/3 270d 6d6c8141fa4d Adjust KERNEL_ASSERT_UNLOCKED() to not assert during a panic.
assert "!_kernel_lock_held()" failed in uvm_map.c (2) 13 305d 522d 3/3 270d 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 283d 283d 3/3 280d 7b4d35e0a60b Avoid assertion failure when splitting mbuf cluster.
multicore boot error: witness: lock_object uninitialized: ADDR 108 292d 295d 3/3 292d 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 314d 343d 3/3 311d de92f022b000 Before coredump or in pledge_fail use SINGLE_UNWIND to stop all threads.
assert "type != NULL" failed in subr_witness.c syz 1 326d 326d 3/3 317d ed07db5bc17e Revert commitid: yfAefyNWibUyjkU2, ESyyH5EKxtrXGkS6 and itscfpFvJLOj8mHB;
assert "nlevel >= IPL_NONE" failed in intr.c C 259 317d 326d 3/3 317d ed07db5bc17e Revert commitid: yfAefyNWibUyjkU2, ESyyH5EKxtrXGkS6 and itscfpFvJLOj8mHB;
witness: reversal: &sched_lock &pr->ps_mtx syz 170 320d 322d 3/3 320d 4ab8b759f72e Fix SCHED_LOCK() leak in single_thread_set()
kernel: integer divide fault trap, code=NUM (4) C 6 405d 461d 3/3 399d 6d14abdcc245 Avoid division by 0 in m_pool_used
panic: rw_enter: rtlck locking against myself 5 546d 546d 3/3 545d 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 573d 589d 3/3 561d 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 719d 719d 3/3 667d 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 691d 691d 3/3 691d 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 707d 758d 3/3 695d ce1ab8dd6b18 Lock vmobjlock then check u_flags & UVM_VNODE_VALID in uvn_attach
kernel: integer divide fault trap, code=NUM (3) C 157 696d 718d 3/3 696d 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 697d 698d 3/3 697d 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 724d 1347d 3/3 724d 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 755d 755d 3/3 755d 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 758d 869d 3/3 758d 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 766d 811d 3/3 760d dc399801d5c5 kqueue: Clear task when closing kqueue
protection_fault: pf_anchor_global_RB_REMOVE 73 799d 886d 3/3 761d 30d709c8a85c Allow waiting during ktable allocation in pf_ioctl.
uvm_fault: pf_anchor_global_RB_INSERT_COLOR (2) 1 762d 762d 3/3 761d 30d709c8a85c Allow waiting during ktable allocation in pf_ioctl.
assert "TAILQ_EMPTY(&lock->lf_blkhd)" failed in vfs_lockf.c (2) C 2 791d 791d 3/3 785d ee8a225221fd Fix ambiguity with lock range end
panic: m_copydata: null mbuf (2) syz 2 798d 798d 3/3 795d 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 813d 813d 3/3 813d 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 819d 831d 3/3 819d 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 867d 911d 3/3 820d 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 834d 866d 3/3 820d 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 834d 834d 3/3 820d 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 836d 836d 3/3 820d 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 840d 840d 3/3 838d 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 851d 903d 3/3 840d 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 844d 858d 3/3 844d 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 851d 851d 3/3 851d Put call to vmx_remote_vmclear() under #ifdef MULTIPROCESSOR to unbreak build of amd64 GENERIC
uvm_fault: igmp_leavegroup (3) 37 851d 943d 3/3 851d 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 855d 856d 3/3 855d 475618162a2c Revert previous. Breaks probing native IDE devices.
multicore boot error: uvm_fault 21 855d 856d 3/3 855d 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 857d 857d 3/3 855d 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 856d 857d 3/3 855d 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 857d 857d 3/3 855d 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 857d 857d 3/3 855d 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 856d 856d 3/3 855d 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 857d 857d 3/3 855d 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 857d never 3/3 857d 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 857d 858d 3/3 857d 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 867d 867d 3/3 864d 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 867d 867d 3/3 864d 447db83cf4f0 Revert holding a read lock on the map while copying out data during sysctl(2).
witness: reversal: netlock vmmaplk C 166 867d 867d 3/3 864d 447db83cf4f0 Revert holding a read lock on the map while copying out data during sysctl(2).
panic: kmmaplk: lock not shared C 15 867d 868d 3/3 867d 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 868d 883d 3/3 867d 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 881d 882d 3/3 881d 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 888d 888d 3/3 881d 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 897d 897d 3/3 891d 2960c8affbaf check pf rule "set prio" values consistently.
assert "sc->sc_dev == NUM" failed in if_tun.c 24 892d 925d 3/3 891d 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 893d 902d 3/3 893d 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 899d 902d 3/3 897d 43496f5abc1b let pfattach() to also initialize pf_default_rule_new to avoid div-by-zero in pf_purge()
panic: unhandled af (4) syz 11 916d 945d 3/3 913d 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 939d 939d 3/3 939d 7945134bbda7 Use a distinct variable while iterating the list of existing devices.
uvm_fault: pppacopen C 92 939d 939d 3/3 939d 7945134bbda7 Use a distinct variable while iterating the list of existing devices.
assert "TAILQ_EMPTY(&ifp->if_addrhooks)" failed in if.c (2) 1 941d 941d 3/3 939d 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 942d 942d 3/3 939d 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 940d 945d 3/3 940d 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 943d 1486d 3/3 943d 5a50f165b8ad DIOCHANGERRULE ioctl must set pointer to ruleset in rule it inserts.
witness: userret: ioctl (3) syz 2 947d 947d 3/3 946d 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 953d 953d 3/3 946d 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 1434d 1504d 3/3 947d d13e571b26fd Remove ptr_array from struct pf_ruleset
panic: uvm_fault_unwire_locked: address not in map (3) 1 950d 950d 3/3 948d 65315d4d4359 Fix a typo in mlock(2) error path triggering a double-free.
panic: vndioctl: null vp C 3 953d 954d 3/3 948d 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 954d 955d 3/3 948d 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 949d 1011d 3/3 948d 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 949d 949d 3/3 949d 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 949d 953d 3/3 949d f08b8e936de9 Do not try to unlock a NULL object.
kernel: integer divide fault trap, code=NUM syz 2 962d 962d 3/3 953d 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 957d 957d 3/3 953d 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 956d 962d 3/3 956d 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 962d 962d 3/3 962d aa5628258068 Add missing kernel unlock in error path.
panic: rw_enter: dklk locking against myself C 6 1024d 1052d 3/3 1020d 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 1034d 1036d 3/3 1034d 11ad9ee57f54 regen
openbsd build error (14) 2 1036d 1036d 3/3 1034d 11ad9ee57f54 regen
openbsd test error: timed out (2) 33 1034d 1036d 3/3 1034d 11ad9ee57f54 regen
multicore build error (13) 3 1036d 1036d 3/3 1034d 11ad9ee57f54 regen
assert "_kernel_lock_held()" failed in uvm_vnode.c 4 1059d 1060d 3/3 1053d 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 1055d 1058d 3/3 1053d 8e114673a836 vmm(4): grab kernel lock before vmspace init
assert "_kernel_lock_held()" failed in uvm_device.c 7 1058d 1060d 3/3 1053d 8e114673a836 vmm(4): grab kernel lock before vmspace init
uvm_fault: rtm_output C 14 1053d 1053d 3/3 1053d d2084f835172 Fix NULL pointer dereference introduced by previous commit.
panic: vcpulock: lock not held 1 1060d 1060d 3/3 1054d 5f3d69798ad5 vmm(4): fix vcpu locking issues reported by syzbot
panic: lock (rwlock) vcpulock not locked C 1 1059d 1059d 3/3 1054d 5f3d69798ad5 vmm(4): fix vcpu locking issues reported by syzbot
panic: rw_enter: vcpulock locking against myself 1 1058d 1058d 3/3 1054d 5f3d69798ad5 vmm(4): fix vcpu locking issues reported by syzbot
assert "_kernel_lock_held()" failed in uvm_map.c C 11 1058d 1060d 3/3 1057d 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 1059d 1780d 3/3 1059d 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 1141d 1142d 3/3 1141d baa47be05351 Remember to lock kqueue mutex in filt_timermodify().
witness: reversal: lock order data missing C 667 1170d 1240d 3/3 1170d 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 1187d 1187d 3/3 1186d 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 1240d 1240d 3/3 1234d 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 1252d 1271d 3/3 1250d 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 1262d 1451d 3/3 1262d 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 1263d 1263d 3/3 1262d 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 1268d 1268d 3/3 1268d 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 1277d 1277d 3/3 1276d 715db9d67ba3 kqueue: Fix termination assert
uvm_fault: pf_addr_compare C 347 1282d 1283d 3/3 1282d 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 1300d 1448d 3/3 1283d 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 1307d 1564d 3/3 1294d 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 1481d 1509d 3/3 1317d 39c2a1337a94 Reject rules with invalid port ranges
openbsd test error: uvm_fault: spllower 6 1332d 1332d 3/3 1325d 3ba77c9295b2 Revert previous extension of the SCHED_LOCK(), the state isn't passed down.
multicore test error: uvm_fault: spllower 12 1332d 1332d 3/3 1325d 3ba77c9295b2 Revert previous extension of the SCHED_LOCK(), the state isn't passed down.
uvm_fault: wsevent_fini (3) C 2 1330d 1330d 3/3 1328d 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 1347d 1369d 3/3 1347d 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 1369d 1466d 3/3 1369d 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 1374d 1374d 3/3 1373d 610c242e11d3 - missing NET_UNLOCK() in pf_ioctl.c error path
panic: spl assertion failure in yield C 12 1501d 1519d 3/3 1374d - 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 1375d 1379d 3/3 1374d a524e041107f timeout(9): fix compilation under NKCOV
multicore build error (8) 88 1375d 1379d 3/3 1374d a524e041107f timeout(9): fix compilation under NKCOV
panic: malloc: allocation too large, type = 98, size = ADDR C 2 1391d 1391d 3/3 1390d 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 1412d 1412d 3/3 1410d 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 1412d 1413d 3/3 1410d 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 1447d 1493d 3/3 1425d 7c72bba2fa26 Convert tcp_sysctl to sysctl_bounded_args
assert "curproc->p_kd == NULL" failed in kcov.c (2) 1 1437d 1437d 3/3 1425d 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 1442d 1443d 3/3 1442d 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 1462d 1519d 3/3 1451d 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 1493d 1493d 3/3 1451d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
panic: sbdrop syz 183 1453d 1753d 3/3 1451d 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 1462d 1727d 3/3 1451d 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 1456d 1606d 3/3 1451d 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 1507d 1507d 3/3 1451d 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 1463d 1706d 3/3 1451d 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 1451d 1695d 3/3 1451d 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 1452d 1738d 3/3 1451d 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 1453d 1765d 3/3 1451d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
soreceive 1a syz 510 1454d 1611d 3/3 1451d 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 1504d 1504d 3/3 1451d 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 1451d 1738d 3/3 1451d 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 1494d 1524d 3/3 1451d efa3c3dd644f Validate input given to ioctl(SIOCAIFADDR_IN6) like NetBSD already does. Fixes a bunch of panics reported by syzkaller.
soreceive 3 syz 755 1451d 1611d 3/3 1451d 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 1462d 1773d 3/3 1451d 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 1462d 1706d 3/3 1451d 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 1457d 1470d 3/3 1454d Revert r1.170. dlg and jmatthew simultaneously fixed this the correct way.
openbsd build error (9) 1 1470d 1470d 3/3 1454d Revert r1.170. dlg and jmatthew simultaneously fixed this the correct way.
uvm_fault: wsevent_fini (2) 1 1478d 1478d 3/3 1457d 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 1473d 1487d 3/3 1473d 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 1490d 1516d 3/3 1489d 38e8113e1d44 state import should accept AF_INET/AF_INET6 only
panic: syn_cache_insert: bucketoverflow: impossible C 5 1502d 1520d 3/3 1499d 2b10bfc1e665 Refuse to set 0 or a negative value for net.inet.tcp.synbucketlimit.
panic: syn_cache_insert: cacheoverflow: impossible 5 1499d 1518d 3/3 1499d 2b10bfc1e665 Refuse to set 0 or a negative value for net.inet.tcp.synbucketlimit.
no output from test machine C 551400 1540d 2115d 3/3 1540d 7bb4371dccb1 Do not wait indefinitely for flushing when closing a tty.
panic: m_copydata: null mbuf C 396 1544d 1731d 3/3 1542d 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 1607d 1607d 3/3 1556d 8e6c5245c1d8 Never update the ND entry (cache) corresponding to a RTF_LOCAL route.
uvm_fault: pfi_dynaddr_remove C 17 1665d 1669d 3/3 1558d 3d97bff14298 fix insufficient input sanitization in pf_rulecopyin() and pf_pool_copyin()
uvm_fault: pfr_detach_table C 12 1665d 1668d 3/3 1558d 3d97bff14298 fix insufficient input sanitization in pf_rulecopyin() and pf_pool_copyin()
openbsd build error (8) 2 1563d 1563d 3/3 1563d 20c8eb7cf336 Add bse(4) device to unbreak build.
multicore build error (5) 4 1563d 1563d 3/3 1563d 20c8eb7cf336 Add bse(4) device to unbreak build.
panic: rw_enter: netlock locking against myself syz 2 1569d 1569d 3/3 1566d 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 1578d 1579d 3/3 1575d fc5a743df3a9 Revert previous, syzkaller found a way to trigger the KASSERT().
uvm_fault: strlcpy (2) 1 1587d 1587d 3/3 1580d 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 1610d 1611d 3/3 1582d 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 1591d 1591d 3/3 1585d 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 1597d 1606d 3/3 1597d aa1987fe7ce4 Fix unlimited recursion caused by local outbound bcast/mcast packet sent via spliced socket.
pool: free list modified: aobjpl C 3 1695d 1707d 3/3 1605d 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 1606d 1607d 3/3 1606d previous commit accidentally aliased two unique timeouts hit by millert
multicore boot error: uvm_fault: softclock 66 1606d 1607d 3/3 1606d previous commit accidentally aliased two unique timeouts hit by millert
kqueue: knote !QUEUED syz 8 1621d 1657d 3/3 1621d 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 1664d 1666d 3/3 1660d 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 1671d 1765d 3/3 1667d f30ff743e528 Fix some races in kqueue_register().
witness: reversal: vmmaplk inode C 103124 1682d 2009d 3/3 1682d 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 1695d 1780d 3/3 1695d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
panic: uvm_mapent_clone: no space in map for entry in empty map C 12 1696d 1702d 3/3 1696d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
panic: amap_pp_adjref: negative reference count C 98 1706d 1758d 3/3 1696d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
uvm_fault: amap_pp_adjref 1 1758d 1758d 3/3 1696d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
uvm_fault: uvm_unmap_remove (2) C 7836 1696d 1779d 3/3 1696d 3c82c0b2df98 Fix uvm_unmap_remove panic when tearing down VMs.
panic: uvmspace_fork: no space in map for entry in empty map C 450 1704d 1758d 3/3 1696d 0f83bb56e561 Fix a bad offset calculation in uvm_share.
assert "TAILQ_EMPTY(&ifp->if_addrhooks)" failed in if.c 2 1716d 1718d 3/3 1711d 9e254176dfa1 take care to avoid a race when creating the same interface.
panic: ifa_update_broadaddr does not support dynamic length syz 6780 1723d 1781d 3/3 1723d 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 1878d 1973d 3/3 1732d 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 1739d 1746d 3/3 1739d put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
uvm_fault: kqueue_scan 1 1761d 1761d 3/3 1739d 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 1742d 1742d 3/3 1739d 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 1739d 1739d 3/3 1739d put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
uvm_fault: bpfioctl C 14 1747d 1831d 3/3 1739d 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 1766d 2034d 3/3 1759d 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 1785d 1785d 3/3 1762d 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 1762d 1763d 3/3 1762d 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 1770d 1890d 3/3 1768d 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 1779d 1798d 3/3 1779d 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 1781d 1798d 3/3 1781d 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 1787d 1861d 3/3 1786d 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 1795d 1800d 3/3 1795d 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 1795d 1799d 3/3 1795d 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 1795d 2006d 3/3 1795d 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 1809d 1810d 3/3 1807d 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 1809d 1810d 3/3 1809d 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 1817d 1823d 3/3 1817d 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 1817d 1823d 3/3 1817d 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 1844d 1844d 3/3 1844d 40f8ed5eebb0 backout the unlock of pipe(2) and pipe2(2)
kernel: protection fault trap, code=0 (4) C 759 1862d 1975d 3/3 1861d cf34c7c30780 Prevent recursions by not deleting entries inside rtable_walk(9).
uvm_fault: arp_rtrequest C 79 1880d 1891d 3/3 1869d 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 1881d 1894d 3/3 1869d 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 1891d 1891d 3/3 1879d 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 1880d 1880d 3/3 1879d 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 1892d 1892d 3/3 1880d 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 1910d 1913d 3/3 1880d 1be240a95e4a Removed all diagnostic, calling printf() here might create a recursion.
witness: reversal: &pr->ps_mtx &sched_lock C 141 1882d 1883d 3/3 1882d 17b25159f963 Revert to using the SCHED_LOCK() to protect time accounting.
uvm_fault: wsmux_do_ioctl (4) C 3 1895d 1919d 3/3 1892d 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 1945d 2010d 3/3 1893d 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 1918d 1918d 3/3 1902d 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 1903d 1905d 3/3 1903d fbb8d265a895 Restore previous behavior of limiting deadlock detection to posix-style locks.
multicore build error (3) 4 1907d 1907d 3/3 1907d always rearm completion queues as leaving them disarmed would lead to rx or tx completion stalling.
openbsd build error (5) 2 1907d 1907d 3/3 1907d always rearm completion queues as leaving them disarmed would lead to rx or tx completion stalling.
panic: timeout_add: to_ticks < 0 (3) 1 1930d 1930d 3/3 1919d 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 1924d 1924d 3/3 1922d 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 1941d 1942d 3/3 1940d 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 1944d 1953d 3/3 1940d 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 1944d 1964d 3/3 1944d 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 1945d 2008d 3/3 1945d 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 1949d 1949d 3/3 1948d 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 1948d 1951d 3/3 1948d 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 1953d 1970d 3/3 1953d fab4809e7ec2 Make sure pointer is within bounds before dereferencing it.
witness: acquiring duplicate lock of same type: "&sc->sc_lock" C 231 1983d 1984d 3/3 1983d 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 1983d 1988d 3/3 1983d 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 1985d 1985d 3/3 1984d 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 1987d 1998d 3/3 1984d 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 1995d 2007d 3/3 1995d 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 1996d 2115d 3/3 1995d When freeing the sem_undo structure in semundo_adjust(), update the
pool: free list modified: semupl C 6 2002d 2115d 3/3 1995d When freeing the sem_undo structure in semundo_adjust(), update the
pool: double put: mbufpl 6 2061d 2063d 3/3 1995d Avoid an mbuf double free in the oob soreceive() path. In the
uvm_fault: wsmux_do_ioctl (2) C 17 2003d 2007d 3/3 2002d In wskbdclose(), use the same logic as in wskbdopen() to determine if
kernel: protection fault trap, code=0 (3) C 3 2007d 2007d 3/3 2007d Validate the user-supplied device index given to WSMUXIO_ADD_DEVICE. The same
uvm_fault: VOP_ACCESS 393 2011d 2054d 3/3 2011d namei can return a null dvp on success. check this before access.
kernel: protection fault trap, code=0 (2) syz 109 2013d 2036d 3/3 2012d Introduce a dedicated entry point data structure for file locks. This new data
panic: malformed IPv4 option passed to ip_optcopy (2) C 149 2018d 2021d 3/3 2015d 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 2040d 2040d 3/3 2024d 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 2038d 2038d 3/3 2024d 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 2038d 2047d 3/3 2027d Validate the version, and all length fields of IP packets passed to a raw socket
panic: m_zero: M_READONLY C 3 2032d 2032d 3/3 2027d 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 2029d 2040d 3/3 2028d ec412da11be4 Fix unsafe use of ptsignal() in mi_switch().
uvm_fault: m_free 12 2038d 2061d 3/3 2028d 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 2047d 2061d 3/3 2028d 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 2042d 2058d 3/3 2028d 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 2059d 2059d 3/3 2028d 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 2056d 2056d 3/3 2028d 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 2038d 2058d 3/3 2028d 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 2049d 2049d 3/3 2031d 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 2048d 2061d 3/3 2037d Fix mbuf releated crashes in switch(4). They have been found by
pool: free list modified: mcl2k C 4 2046d 2100d 3/3 2045d 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 2047d 2056d 3/3 2046d 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 2056d 2062d 3/3 2046d 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 2123d 2115d 3/3 2046d 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 2051d 2051d 3/3 2047d When no child devices are attached to a wsmux device, make sure to return an
uvm_fault: wsmux_do_ioctl 2 2077d 2115d 3/3 2047d 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 2064d 2064d 1/3 2061d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees
kernel: protection fault trap, code=0 C 16 2061d 2066d 1/3 2061d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees
uvm_fault: ip_ctloutput C 11 2061d 2065d 1/3 2061d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees
uvm_fault: ip_pcbopts C 6 2061d 2065d 1/3 2061d In PRU_DISCONNECT don't fall through into PRU_ABORT since the latter frees