last executing test programs: 287.277619ms ago: executing program 7 (id=8): r0 = syz_open_pts() close(r0) writev(r0, &(0x7f0000000080)=[{&(0x7f00000002c0)="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", 0x108}], 0x1) ioctl$TIOCSETA(r0, 0x802c7414, &(0x7f0000000080)={0x231, 0x7, 0x200, 0x0, "0dd5c860652c0b7fc00800e82d7b3212de8433b0", 0x2, 0x7}) ioctl$VMM_IOC_RESETCPU(0xffffffffffffffff, 0x82405605, &(0x7f00000000c0)={0xa, 0x8000148, {[0x3, 0x0, 0x6, 0x6, 0x3, 0x3, 0x1, 0x0, 0x7, 0xfffff, 0xff9b, 0x91c, 0xa, 0x180, 0x0, 0xd7, 0x76, 0xfffffffffffffff7], [0x5438b94c, 0x5, 0x1004, 0x7, 0x1, 0x1, 0x9, 0xb, 0xffffffffffffffff, 0x3], [0x6, 0x0, 0x8, 0x8000000008, 0x10000, 0xebd, 0x2], [0x1, 0x10801, 0x0, 0x5, 0x3, 0x6], [{0x5ad, 0x7, 0xfffffffb, 0x6}, {0x2, 0x925, 0x3, 0xffff}, {0x1000, 0x8001, 0x0, 0x5}, {0x8, 0x2, 0x3}, {0x4, 0x403, 0x2, 0x9}, {0x1f, 0x4, 0x4, 0x4}, {0xe4, 0xffffff81, 0x8, 0x1}, {0x1, 0x10000, 0x8002, 0x5}], {0x3, 0x4, 0x8, 0xa}, {0xfffa, 0xffffbfc0, 0xd}}}) socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000080)={0xffffffffffffffff, 0xffffffffffffffff}) recvmmsg(r1, &(0x7f0000000040)={{0x0, 0x0, 0x0, 0x0, 0x0}, 0xfe}, 0x38, 0x3042, 0x0) r2 = socket(0x18, 0x2, 0x0) sendmmsg(r2, &(0x7f0000000000)={{&(0x7f00000000c0)=@in6={0x1c, 0x18, 0x3, 0x7, "ff010000000000000000000000000001", 0xc}, 0x18, 0x0, 0x0, 0x0}}, 0x38, 0x8) pipe2(&(0x7f0000000040), 0x10000) 271.833669ms ago: executing program 3 (id=4): mknod(&(0x7f0000000000)='./file0\x00', 0x2950, 0x13d4) ktrace(&(0x7f0000000200)='./file0\x00', 0x4, 0xd27d43220c7df9f, 0x0) 63.559783ms ago: executing program 7 (id=9): r0 = openat$pf(0xffffffffffffff9c, &(0x7f0000000100), 0x80, 0x0) select(0x40, &(0x7f0000000180)={0xfffffffffffffff9, 0x44809e9d, 0xffffffffffffffff, 0xfffffffffffffffd, 0x2800000000000000, 0x181c, 0x8, 0x2000000000000004}, 0x0, 0x0, 0x0) r1 = kqueue1(0x10000) kevent(r1, &(0x7f00000000c0), 0x8, &(0x7f00000001c0), 0x13, 0x0) mknod(&(0x7f0000000280)='./file0\x00', 0x2000, 0x285b9c) r2 = open(&(0x7f0000000080)='./file0\x00', 0x10, 0x100) ioctl$FIONBIO(r2, 0x82907003, &(0x7f0000000140)=0x2) ioctl$BIOCSRTIMEOUT(r2, 0xc0307006, &(0x7f0000000240)={0x2, 0xb}) ioctl$DIOCGETSYNFLWATS(r0, 0xc0084463, &(0x7f0000000000)) ioctl$DIOCNATLOOK(r0, 0xc0504417, &(0x7f0000000080)={@v6=@ipv4={'\x00', '\xff\xff', @remote={0xac, 0x14, 0x0}}, @v6=@ipv4={'\x00', '\xff\xff', @broadcast}, @v6=@local={0xfe, 0x80, '\x00', 0x0}, @v6=@mcast2, 0x3, 0x40, 0x8001, 0x2, 0x0, 0x3, 0x18, 0x5, 0x3}) 61.85371ms ago: executing program 1 (id=2): r0 = socket$inet(0x2, 0x3, 0x102) sendto$inet(r0, &(0x7f0000000140)="1036c5991fe996bb243733e84aefd1b73005372e", 0x14, 0x0, &(0x7f0000000200)={0x10, 0x2, 0x1, 0xd}, 0x10) setrlimit(0x8, &(0x7f0000000980)={0x42, 0x62}) r1 = syz_open_pts() close(r1) syz_open_pts() ioctl$TIOCSETAW(r1, 0x802c7415, &(0x7f0000000000)={0x7fffffff, 0x2, 0x5, 0xffff7df8, "ec7600b72802100006faef2be3d500e1ffffff00", 0x80000003, 0x5}) writev(r1, &(0x7f0000002040)=[{&(0x7f0000000e40)="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", 0x524}], 0x1) unveil(0x0, 0x0) rmdir(0x0) r2 = openat$pf(0xffffffffffffff9c, &(0x7f0000000300), 0x2, 0x0) ioctl$DIOCRCLRTABLES(r2, 0xc450443c, &(0x7f0000000340)={{'./file0\x00', './file0\x00', 0x10, 0xfd}, 0x0, 0x0, 0x0, 0x5, 0xffffffff, 0x697, 0xc1, 0x40}) select(0xd, &(0x7f00000000c0)={0x4, 0xe9, 0x8, 0x81, 0x2, 0x4, 0x8000000000000000, 0xb}, &(0x7f0000000140)={0x1, 0xffffffffffffcca3, 0x101, 0x40000000003, 0x5, 0x7, 0x0, 0x6}, &(0x7f0000000300)={0x4, 0x8000000000000000, 0x3d, 0x100, 0x9, 0xda0, 0x5, 0xe}, 0x0) 44.309765ms ago: executing program 2 (id=3): r0 = open(&(0x7f0000000180)='./file0\x00', 0x80000000000206, 0x61) pipe(&(0x7f00000020c0)={0xffffffffffffffff, 0xffffffffffffffff}) renameat(r1, &(0x7f00000000c0)='./file0\x00', r2, &(0x7f0000000100)='./file0\x00') mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1) r3 = socket$inet(0x2, 0x1, 0x0) getsockopt(r3, 0x0, 0x23, 0xffffffffffffffff, &(0x7f0000000040)) setrlimit(0x1, &(0x7f0000000000)={0xfffffffffffffffd, 0xffffffffffffffff}) ktrace(&(0x7f0000000040)='./file0\x00', 0x4, 0x20003916, 0xffffffffffffffff) r4 = openat$bpf(0xffffffffffffff9c, &(0x7f0000000080), 0x1, 0x0) getsockopt$SO_PEERCRED(r3, 0xffff, 0x1022, &(0x7f00000001c0)={0x0}, 0xc) getsid(r5) ioctl$BIOCSETWF(r4, 0x80104277, &(0x7f0000000040)={0x28, 0x0}) shmget(0x3, 0x3000, 0x28e, &(0x7f00000d8000/0x3000)=nil) mknodat(r0, &(0x7f0000000140)='./file0\x00', 0x8000, 0xd) truncate(&(0x7f00000003c0)='./file0\x00', 0x7ffffffffff) 38.379594ms ago: executing program 0 (id=1): r0 = socket(0x18, 0x2, 0x0) sendmmsg(r0, &(0x7f00000000c0)={{&(0x7f0000000040)=@in6={0x1c, 0x18, 0x1, 0x6, "ff0116ff000000000000000000000004", 0x2}, 0x1c, 0x0, 0x0, 0x0}}, 0x1, 0x608) r1 = syz_open_pts() msgrcv(0x0, 0x0, 0x0, 0x3, 0x0) msgctl$IPC_SET(0x0, 0x1, 0xfffffffffffffffe) syz_open_pts() syz_emit_ethernet(0x24, &(0x7f0000000040)=ANY=[@ANYBLOB="aaaaaaaaaaaa0000274400000800eb02ac1400aa71d7"]) syz_open_pts() open$dir(&(0x7f0000000000)='./file0\x00', 0x8000, 0x4) lseek(r1, 0x2, 0x2) 30.746307ms ago: executing program 5 (id=6): r0 = openat$bpf(0xffffffffffffff9c, &(0x7f0000000040), 0x8, 0x0) r1 = open$dir(&(0x7f0000000000)='./file0/file0\x00', 0x20, 0x0) fchmod(r1, 0xf3) socket(0x18, 0x3, 0x8) ioctl$BIOCFLUSH(r0, 0x20004268) setuid(0xffffffffffffffff) open(&(0x7f0000000480)='./file0\x00', 0x80000000000206, 0x4ebfac6bbaf7959) fcntl$setown(r0, 0x6, 0x0) 30.137356ms ago: executing program 2 (id=10): r0 = openat$bpf(0xffffffffffffff9c, &(0x7f0000000100), 0xbe, 0x0) ioctl$BIOCSETIF(r0, 0x8020426c, &(0x7f0000000200)={'tap', 0x0}) write(r0, &(0x7f0000000000)="f81ad3010006000000650200000000000000", 0x12) 28.822055ms ago: executing program 5 (id=11): mkdir(&(0x7f0000000280)='./file0\x00', 0x0) unveil(&(0x7f0000000000)='./file0\x00', &(0x7f00000001c0)='x\x00') execve(&(0x7f0000000180)='./file0\x00', 0x0, 0x0) mknod(&(0x7f0000000100)='./file1\x00', 0x0, 0x1e5f) semget(0x0, 0x4, 0x281) open(&(0x7f0000000080)='./file2\x00', 0x10, 0x14b) 11.105728ms ago: executing program 4 (id=5): futimens(0xffffffffffffffff, 0x0) syz_emit_ethernet(0x36, 0x0) mknod(&(0x7f0000000280)='./file0\x00', 0x1100, 0x0) r0 = open(&(0x7f0000000100)='./file0\x00', 0x70e, 0xc2) ioctl$BIOCSETWF(0xffffffffffffff9c, 0x80104277, &(0x7f0000000200)={0x3, &(0x7f00000001c0)=[{0xb, 0x5, 0x5, 0xdffffff1}, {0x21, 0x3}, {0x6, 0x0, 0x2, 0xfffffffd}]}) ioctl$BIOCSETIF(0xffffffffffffffff, 0x8020426c, &(0x7f00000001c0)={'tap', 0x0}) ioctl$FIONREAD(r0, 0x8020691f, &(0x7f00000001c0)) 10.496894ms ago: executing program 2 (id=12): mknod(&(0x7f0000000100)='./file0\x00', 0x2000, 0x1e5f) r0 = openat$bpf(0xffffffffffffff9c, &(0x7f00000001c0), 0x1, 0x0) openat$bpf(0xffffffffffffff9c, &(0x7f0000000080), 0x100, 0x0) open(&(0x7f0000000080)='./bus\x00', 0x0, 0x0) (async) ioctl$FIOASYNC(0xffffffffffffffff, 0x8004667d, &(0x7f00000000c0)=0x9) (async) mknod(&(0x7f0000000100)='./file0\x00', 0x6000, 0x202) (async) setrlimit(0x8, &(0x7f0000000980)={0x42, 0x65}) (async) r1 = syz_open_pts() close(r1) (async) r2 = syz_open_pts() ioctl$TIOCSETA(r2, 0x802c7414, &(0x7f0000000340)={0x8000006, 0x8, 0xfffffffe, 0xffffff8f, "08ed95990000000000000000ffffffffffffffe6", 0x800b, 0x8}) (async) syz_emit_ethernet(0x4e, &(0x7f0000000180)={@random="8f6f77ede655", @remote, [], {@ipv6={0x86dd, {0x0, 0x6, "5f6ad9", 0x18, 0x3a, 0x1, @remote={0xfe, 0x80, '\x00', 0x0}, @local={0xfe, 0x80, '\x00', 0x0}, {[], @icmpv6=@mld={0x83, 0x0, 0x0, 0x2, 0xa47, @mcast1}}}}}}) (async) mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1) (async) syz_emit_ethernet(0x36, &(0x7f0000000180)={@broadcast, @empty, [], {@ipv4={0x800, {{0x5, 0x4, 0x0, 0x0, 0x28, 0x67, 0x7f00, 0x0, 0x11, 0x0, @empty, @rand_addr=0xac14ffff}, @tcp={{0x0, 0x3, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x0, 0x0, 0x0, 0x2}}}}}}) (async) ioctl$BIOCSETF(r0, 0x80104267, &(0x7f0000000040)={0x1, &(0x7f0000000000)=[{0x9b1e, 0x2, 0xb, 0x4}]}) (async) ioctl$BIOCSETF(r0, 0x80104267, &(0x7f0000000040)={0x0, 0x0}) r3 = open(&(0x7f0000000040)='./file0\x00', 0x0, 0x91) ioctl$BIOCSETWF(r3, 0x80044403, &(0x7f0000000000)={0xff7b, 0x0}) (async) sysctl$kern(&(0x7f0000000000)={0x1, 0x1d}, 0x2, 0x0, 0x0, 0x0, 0x0) 10.217453ms ago: executing program 6 (id=7): r0 = socket(0x2, 0x1, 0x0) shutdown(r0, 0x2) dup3(r0, r0, 0x0) ioctl$FIONREAD(r0, 0xc0287533, &(0x7f0000000140)) 9.957671ms ago: executing program 7 (id=13): r0 = socket(0x11, 0x3, 0x0) sendto$unix(r0, &(0x7f0000000000)="b1000513000000000000000020000000000013fecea10500fef96ecf2ac72fd3357ae30208004e3039d2d236acf20b7804be38164991f7c8cf7f882b299ee1aa0500000051e2f0ad3ebbc257699af4879b672f33000000000c032bfa896443a41c02000000720fd38b08519928a0b870bef5a872c88106002ec5890400000000000000361b1257aea8c508002002fbfe0c2300008abfba0900000008e371a3f8343712051eeab7196fcbd80407000000c011200000e1718d30d4a13f1dd80460259bbdf3688f457ceb4dbd32bcd83790095c6eb09e606187259a80efe2122e02afb4f82cdc77eaa6a35869ff4c2c2e07ed6f2f37ceb26a25109b47e440a5b3da3aad8f544c369840746d7729bb0cd2ce63ab858a44c30951d643e0b1b411780ad699b0b33980422cb8049ab366f602818c18269cd097cf09d003ea9c", 0x13c, 0x402, 0x0, 0x0) 4.314291ms ago: executing program 6 (id=14): r0 = socket(0x18, 0x2, 0x0) connect$inet6(r0, &(0x7f0000000000)={0x1c, 0x18, 0x2, 0x54c4, "fe80000000000000008e00020000ffff", 0xffff0001}, 0x1c) futimes(r0, 0x0) 3.87065ms ago: executing program 3 (id=15): kevent(0xffffffffffffffff, &(0x7f0000000240)=[{{}, 0xfffffffffffffff6, 0x28, 0xfffff, 0xfe, 0x8000400000013fff}], 0x1, 0x0, 0x2b8b, 0x0) mknodat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1000, 0x0) (async) mknodat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1000, 0x0) setuid(0xee01) socket(0x18, 0x3, 0x0) (async) socket(0x18, 0x3, 0x0) close(0xffffffffffffffff) r0 = openat$diskmap(0xffffffffffffff9c, &(0x7f0000000080), 0x10000, 0x0) ioctl$DIOCMAP(r0, 0xc0106477, &(0x7f00000000c0)={&(0x7f0000000140)='./file0\x00', r0, 0x3}) ioctl$FIOASYNC(0xffffffffffffffff, 0x80047460, &(0x7f00000000c0)=0x4) (async) ioctl$FIOASYNC(0xffffffffffffffff, 0x80047460, &(0x7f00000000c0)=0x4) setreuid(0x0, 0xffffffffffffffff) lstat(&(0x7f0000000180)='./file1\x00', &(0x7f00000002c0)) chflags(&(0x7f0000000100)='./file0\x00', 0x0) sysctl$hw(&(0x7f0000000280)={0x6, 0x8}, 0x2, &(0x7f0000000000)="0000e65bc39e76ecc9ddb3c3cc6bbc2506870300ec", &(0x7f0000000240)=0x15, 0x0, 0x0) execve(0x0, 0x0, 0x0) (async) execve(0x0, 0x0, 0x0) readv(r0, &(0x7f0000000200)=[{&(0x7f0000002640)=""/4121, 0x100f}, {&(0x7f0000003680)=""/4077, 0xff5}, {&(0x7f00000001c0)=""/23}], 0x1c) 3.06116ms ago: executing program 5 (id=16): mknod(&(0x7f0000001040)='./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\x00', 0x2000, 0xd02) rename(&(0x7f00000003c0)='./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\x00', &(0x7f0000000000)='./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\x00') rename(&(0x7f0000000e40)='./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\x00', &(0x7f0000000580)='./file2\x00') link(&(0x7f0000000240)='./file2\x00', &(0x7f0000000280)='./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\x00') 0s ago: executing program 2 (id=17): syz_emit_ethernet(0x12, &(0x7f0000000080)=ANY=[@ANYBLOB="aaaaaaaaaaaaadc9bcfb08ca81003000819a450afffb4a89907800000006ffffffff4e204e2000089078"]) ioctl$WSMUXIO_INJECTEVENT(0xffffffffffffffff, 0x80185760, &(0x7f0000000000)={0x7f, 0x0, {0x1000000ff}}) sysctl$hw(&(0x7f0000000000)={0x4, 0x18}, 0x2, 0x0, 0x0, 0x0, 0x0) ioctl$BIOCSETWF(0xffffffffffffffff, 0x80104277, &(0x7f00000001c0)={0x48, &(0x7f0000000100)}) r0 = socket(0x18, 0x3, 0x0) r1 = socket(0x18, 0x3, 0x0) sysctl$hw(&(0x7f0000000040)={0x6, 0x5}, 0x2, &(0x7f0000000200)="9d14f8ac7aeaadf4b6c9397ac42e830e8ba709499f8212d463bb363ccbd61b9610f94d3ea0f4ab9d6960e8ac15f7ada89897d067d0575344bbdb7546385ced596d1479a370015389776c3fa581c8fe511699077706dee94268aaabe39f18543a1040d1c89529d6d0d4dbc6c08d623cf7ddfd501d8e3b435b31a13389ed3600ba8b329ffabb5127265a13b1325420cfcb0d29ca4c7a223a3e984a925478948779a0c08d5bf22c69fc3862f5cba2ef6ff0a0d0d2dff8960f562d7dc2db98477c0d1dad8f27686bafdd9fd3fe6c65", &(0x7f0000000300)=0xcd, &(0x7f0000000340)="5397a17bb7d4423e20321ce1a99a772b4f2f3867ec3e6975d9da8763ef168c2149e23371b0329e928eeaedf1bd8a5e889bc5df1f069f8a8d79106030d4499ebd8a5d23de12182ed993606ca57881", 0x4e) ioctl$FIONREAD(r1, 0xc0106924, &(0x7f00000001c0)) sysctl$net_inet_tcp(&(0x7f0000000000)={0x7, 0x2, 0x2, 0x1}, 0x4, 0x0, 0x0, 0x0, 0x0) sysctl$kern(&(0x7f0000000000)={0xa}, 0x7, &(0x7f0000000080), 0x0, 0x0, 0x24) syz_emit_ethernet(0x6e, &(0x7f00000000c0)={@random="8f6f77ede655", @broadcast, [], {@ipv6={0x86dd, {0x0, 0x6, "5f6ad9", 0x38, 0x3a, 0x0, @empty, @local={0xfe, 0x80, '\x00', 0x0}, {[], @icmpv6=@pkt_toobig={0x2, 0x0, 0x0, 0x0, {0x0, 0x6, "fa0b00", 0x0, 0x3a, 0x80, @local={0xfe, 0x80, '\x00', 0x0}, @rand_addr="36c6473f2c93ca0040444f165e96d140", [@routing={0x4, 0x0, 0x0, 0xfc}]}}}}}}}) ioctl$FIONREAD(r0, 0x80206913, &(0x7f0000000100)) mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1) setregid(0x0, 0x0) socket(0x20, 0x4, 0x7) sysctl$net_inet_etherip(&(0x7f0000000000)={0x4, 0x13, 0x61, 0x2}, 0x4, 0x0, 0x0, 0x0, 0x0) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.135' (ED25519) to the list of known hosts. WuARvNImN_G:f aSuPlLt N(OT0x LfOfWfEfRfE6D8 0O6Nc f1SYf9SCaA0,L L0 74x 9-82,8 106,6 9613)2 -E>X IeT 0k ea rneStopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 340757 45488 0 0 0x4000000 0K syz-executor *276159 45041 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7220a9759aa0, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu0: uvm_fault(0xfffff6806cf1f9a0, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7220a9759aa0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000387a6cd0 rbx 0 rdx 0 rcx 0xffff80003639c550 rax 0x3b r8 0xffff8000387a6c00 r9 0 r10 0x21e49e0a71d313e7 r11 0xbbf13349b6ea3921 r12 0 r13 0 r14 0xffff80003639c550 r15 0 rip 0xffffffff821793ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000387a6c50 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=276159 pid=45041 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003639cd18,0xffff800045fefa18 process=0xffff800045feb508 user=0xffff8000387a1000, vmspace=0xfffff6806cf1f7b8 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 45488 419544 88526 0 2 0 0 syz-executor 45488 340757 88526 0 7 0 0x4000000 syz-executor 2496 258616 57058 0 2 0 0 syz-executor 2496 118081 57058 0 3 0 0x4000080 fsleep syz-executor 95036 54235 60355 0 2 0 0 syz-executor 95036 392261 60355 0 3 0 0x4000080 fsleep syz-executor *45041 276159 91785 0 7 0 0 syz-executor 45041 17310 91785 0 3 0 0x4000080 fsleep syz-executor 45041 127693 91785 0 3 0 0x4000080 fsleep syz-executor 72562 412654 89100 0 2 0 0 syz-executor 72562 310620 89100 0 3 0 0x4000080 fsleep syz-executor 26642 70450 63207 0 2 0 0xc80 syz-executor 26642 72532 63207 0 2 0 0x4000c80 syz-executor 26642 308477 63207 0 3 0 0x4000080 fsleep syz-executor 60355 184731 26448 0 3 0x2 0x80 nanoslp syz-executor 88526 64295 26448 0 3 0x2 0x80 nanoslp syz-executor 94161 462009 26448 0 2 0x2 0 syz-executor 91785 18528 26448 0 3 0x2 0x80 nanoslp syz-executor 54083 439853 26448 0 2 0x2 0 syz-executor 57058 177031 26448 0 2 0x2 0xc80 syz-executor 63207 97993 26448 0 3 0x2 0x80 nanoslp syz-executor 89100 256913 26448 0 2 0x2 0xc80 syz-executor 26448 46832 94847 0 3 0x2 0x80 kqread syz-executor 94847 284065 94290 0 3 0x100002 0x88 sigsusp ksh 94290 49428 54215 0 3 0x10 0x88 kqread sshd-session 54215 250804 26187 0 3 0x12 0x80 kqread sshd-session 62888 198925 1 0 3 0x100003 0x80 ttyin getty 26187 131795 1 0 3 0 0x88 kqread sshd 3001 168996 10967 74 2 0x1100012 0x80 pflogd 10967 85639 1 0 3 0 0x80 sbwait pflogd 24964 288130 97647 73 3 0x1100010 0x80 kqread syslogd 97647 47679 1 0 3 0x100002 0x80 sbwait syslogd 31042 418456 1 0 3 0x100000 0x80 kqread resolvd 92749 29644 75974 77 3 0x100012 0x80 kqread dhcpleased 13584 150467 75974 77 3 0x100012 0x80 kqread dhcpleased 75974 233259 1 0 3 0 0x80 kqread dhcpleased 3038 54854 0 0 3 0x14000 0x200 pause smr 38994 12447 0 0 2 0x14000 0x200 zerothread 11713 514716 0 0 3 0x14000 0x200 aiodoned aiodoned 33585 504820 0 0 3 0x14000 0x200 syncer update 14607 327027 0 0 3 0x14000 0x200 cleaner cleaner 83028 55583 0 0 3 0x14000 0x200 reaper reaper 17999 28308 0 0 3 0x14000 0x200 pgdaemon pagedaemon 67634 185319 0 0 3 0x14000 0x200 bored viomb 45657 204519 0 0 3 0x14000 0x40000200 acpi0 acpi0 3310 312607 0 0 3 0x14000 0x40000200 idle1 63985 493368 0 0 3 0x14000 0x200 bored softnet1 77587 65722 0 0 3 0x14000 0x200 bored softnet0 66352 523347 0 0 3 0x14000 0x200 smrbar systqmp 430 164285 0 0 3 0x14000 0x200 bored systq 13882 272234 0 0 3 0x14000 0x200 tmoslp softclockmp 7576 248823 0 0 3 0x14000 0x40000200 tmoslp softclock 98461 91564 0 0 3 0x14000 0x40000200 idle0 1 28572 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffff6806cdc2c10) #0 witness_lock+0x5f1 #1 mtx_enter+0x4b4 #2 pmap_write_protect+0x80 #3 uvm_map_protect+0xb95 #4 sys_mprotect+0x351 #5 syscall+0xbd4 #6 Xsyscall+0x128 Process 45488 (syz-executor) thread 0xffff800045feea78 (340757) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83ad3e40) #0 witness_lock+0x5f1 #1 syscall+0xaf4 #2 Xsyscall+0x128 Process 45041 (syz-executor) thread 0xffff80003639c550 (276159) exclusive rwlock uobjlk r = 0 (0xfffff6806d42e0b8) #0 witness_lock+0x5f1 #1 rw_do_enter_write+0x419 #2 uvm_map_protect+0xb36 #3 sys_mprotect+0x351 #4 syscall+0xbd4 #5 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffff6806cf1f8b8) #0 witness_lock+0x5f1 #1 rw_do_enter_write+0x419 #2 vm_map_lock_ln+0x12e #3 uvm_map_protect+0xe0 #4 sys_mprotect+0x351 #5 syscall+0xbd4 #6 Xsyscall+0x128 exclusive mutex &pmap->pm_mtx r = 0 (0xfffff6806cdc2c10) #0 witness_lock+0x5f1 #1 mtx_enter+0x4b4 #2 pmap_write_protect+0x80 #3 uvm_map_protect+0xb95 #4 sys_mprotect+0x351 #5 syscall+0xbd4 #6 Xsyscall+0x128 Process 94161 (syz-executor) thread 0xffff800045fef770 (462009) exclusive rrwlock inode r = 0 (0xfffff6806cb8dd80) #0 witness_lock+0x5f1 #1 rw_do_enter_write+0x419 #2 rrw_enter+0xc6 #3 VOP_LOCK+0xbd #4 ufs_ihashins+0x4f #5 ffs_vget+0x187 #6 ffs_inode_alloc+0x279 #7 ufs_mkdir+0xfc #8 VOP_MKDIR+0x101 #9 domkdirat+0x179 #10 syscall+0xb17 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff68078a0b1e0) #0 witness_lock+0x5f1 #1 rw_do_enter_write+0x419 #2 rrw_enter+0xc6 #3 VOP_LOCK+0xbd #4 vn_lock+0xa4 #5 vfs_lookup+0x12b #6 namei+0x7c5 #7 domkdirat+0x8b #8 syscall+0xb17 #9 Xsyscall+0x128 Process 54083 (syz-executor) thread 0xffff80002a2227d8 (439853) exclusive rrwlock inode r = 0 (0xfffff6806cb8d0c8) #0 witness_lock+0x5f1 #1 rw_do_enter_write+0x419 #2 rrw_enter+0xc6 #3 VOP_LOCK+0xbd #4 vn_lock+0xa4 #5 vget+0x2a2 #6 ufs_ihashget+0x185 #7 ffs_vget+0x8c #8 ufs_lookup+0x1a36 #9 VOP_LOOKUP+0x6e #10 vfs_lookup+0x963 #11 namei+0x7c5 #12 dounlinkat+0xc1 #13 syscall+0xb17 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff68078a0b8d0) #0 witness_lock+0x5f1 #1 rw_do_enter_write+0x419 #2 rrw_enter+0xc6 #3 VOP_LOCK+0xbd #4 vn_lock+0xa4 #5 vfs_lookup+0x12b #6 namei+0x7c5 #7 dounlinkat+0xc1 #8 syscall+0xb17 #9 Xsyscall+0x128 Process 66352 (systqmp) thread 0xffff800045ffe530 (523347) shared rwlock systqmp r = 0 (0xffffffff838e3108) #0 witness_lock+0x5f1 #1 taskq_thread+0x12a #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11061 12150K 12151K 166960K 12160 0 pcb 19 12K 12K 166960K 22 0 rtable 239 7K 7K 166960K 357 0 pf 34 17K 18K 166960K 48 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 60 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1486 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1292 81K 82K 166960K 1372 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 16 57K 97K 166960K 149 0 proc 71 115K 163K 166960K 554 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 6K 6K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 388 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 220 159K 167K 166960K 3195 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 41 82K 106K 166960K 1315 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 28 2K 2K 166960K 29 0 temp 34 9114K 9120K 166960K 3923 0 kqueue 14 22K 22K 166960K 27 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 28 0 0 1 0 1 1 0 8 0 rtpcb 120 35 0 31 1 0 1 1 0 8 0 rtentry 176 112 0 2 6 0 6 6 0 8 0 unpcb 144 41 0 24 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 10 0 6 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 74 0 63 1 0 1 1 0 8 0 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 18 0 0 1 0 1 1 0 8 0 pfstkey 128 18 0 0 1 0 1 1 0 8 0 pfstate 448 18 0 0 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 459 0 0 29 0 29 29 0 8 0 art_table 40 460 0 0 5 0 5 5 0 8 0 art_node 32 112 0 9 1 0 1 1 0 8 0 semapl 72 2 0 1 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1586 0 118 93 0 93 93 0 8 0 ffsino 296 1586 0 118 114 0 114 114 0 8 0 nchpl 144 1799 0 100 64 0 64 64 0 8 0 vnodes 216 1681 0 0 94 0 94 94 0 8 0 namei 1024 5528 0 5527 2 0 2 2 0 8 1 percpumem 16 53 0 2 1 0 1 1 0 8 0 kstatmem 264 29 0 2 2 0 2 2 0 8 0 scxspl 216 6247 0 6247 4 2 2 3 1 8 2 plimitpl 152 32 0 14 1 0 1 1 0 8 0 sigapl 424 469 0 423 7 0 7 7 0 8 1 knotepl 120 52 0 0 2 0 2 2 0 8 0 kqueuepl 224 25 0 14 1 0 1 1 0 8 0 pipepl 344 129 0 102 3 0 3 3 0 8 0 fdescpl 528 453 0 423 3 0 3 3 0 8 0 filepl 160 1620 0 1401 10 0 10 10 0 8 0 lockfpl 104 10 0 8 1 0 1 1 0 8 0 lockfspl 48 6 0 4 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 99 0 86 1 0 1 1 0 8 0 zombiepl 144 423 0 423 1 0 1 1 0 8 1 processpl 1232 469 0 423 5 0 5 5 0 8 1 procpl 664 493 0 439 5 0 5 5 0 8 0 sockpl 752 152 0 120 4 0 4 4 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 107 0 0 14 0 14 14 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mextrefs 64 22 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 112 0 0 7 0 7 7 0 8 0 bufpl 272 2300 0 105 147 0 147 147 0 8 0 anonpl 32 3795 0 0 31 0 31 31 0 247 0 amapchunkpl 152 8662 0 8218 19 0 19 19 0 158 1 amappl16 200 1767 0 1752 5 0 5 5 0 8 4 amappl15 192 3 0 3 1 0 1 1 0 8 1 amappl14 184 437 0 436 1 0 1 1 0 8 0 amappl13 176 127 0 115 1 0 1 1 0 8 0 amappl12 168 704 0 675 2 0 2 2 0 8 0 amappl11 160 40 0 39 1 0 1 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 276 0 275 1 0 1 1 0 8 0 amappl8 136 97 0 96 1 0 1 1 0 8 0 amappl7 128 147 0 134 1 0 1 1 0 8 0 amappl6 120 158 0 157 1 0 1 1 0 8 0 amappl5 112 102 0 91 1 0 1 1 0 8 0 amappl4 104 294 0 275 1 0 1 1 0 8 0 amappl3 96 1501 0 1414 3 0 3 3 0 8 0 amappl2 88 588 0 515 2 0 2 2 0 8 0 amappl1 80 10406 0 9813 14 0 14 14 0 8 0 amappl 88 2462 0 2314 4 0 4 4 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 453 0 423 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 453 0 423 1 0 1 1 0 8 0 vmmpekpl 168 5755 0 5721 2 0 2 2 0 8 0 vmmpepl 168 38630 0 36812 84 0 84 84 0 357 1 vmsppl 488 452 0 423 5 0 5 5 0 8 1 rwobjpl 80 14572 0 13586 23 0 23 23 0 8 0 pdppl 4096 913 0 846 99 12 87 87 0 8 20 pvpl 32 9296 0 0 75 0 75 75 0 265 0 pmappl 256 452 0 423 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 412 0 15 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83965ff0) at x86_ipi_db+0x27 x86_ipi_handler() at x86_ipi_handler+0xd9 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 acpitimer_delay(1) at acpitimer_delay+0x175 comcnputc(800,65) at comcnputc+0x29b cnputc(65) at cnputc+0x67 db_putchar(65) at db_putchar+0x36d kprintf() at kprintf+0x223 db_printf(ffffffff8354d8bf) at db_printf+0x9b db_ktrap(6,0,ffff8000387b2230) at db_ktrap+0xe3 kerntrap(ffff8000387b2230) at kerntrap+0x243 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045feea78,fffff680690171c0,ffff8000387b2410) at dovutimens+0x368 end trace frame: 0xffff8000387b2480, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83965ff0) at x86_ipi_db+0x27 x86_ipi_handler() at x86_ipi_handler+0xd9 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 acpitimer_delay(1) at acpitimer_delay+0x175 comcnputc(800,65) at comcnputc+0x29b cnputc(65) at cnputc+0x67 db_putchar(65) at db_putchar+0x36d kprintf() at kprintf+0x223 db_printf(ffffffff8354d8bf) at db_printf+0x9b db_ktrap(6,0,ffff8000387b2230) at db_ktrap+0xe3 kerntrap(ffff8000387b2230) at kerntrap+0x243 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045feea78,fffff680690171c0,ffff8000387b2410) at dovutimens+0x368 sys_futimes(ffff800045feea78,ffff8000387b2560,ffff8000387b24b0) at sys_futimes+0x208 syscall(ffff8000387b2560) at syscall+0xb17 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfde09438640, count: -17 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7220a9759aa0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7220a9759aa0, count: -1