Brad Fitzpatrick 943b426038 util/linuxfw: fix nil deref in nftables chain check ...

Fix a panic in getOrCreateChain when the kernel lacks nftables support
(CONFIG_NF_TABLES). When the nftables netlink connection fails, chain
objects returned by getChainFromTable can have nil Hooknum and Priority
fields. Dereferencing these caused tailscaled to SIGSEGV during router
configuration, which manifested as tailscaled silently crashing ~13
seconds after "tailscale up" on arm64 gokrazy (whose kernel.arm64
build doesn't include nftables).

Updates #13038

Change-Id: I14433616da5ed57895cad37038921fb4f79c3534
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

2026-04-14 07:45:01 -07:00

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backoff

all: remove AUTHORS file and references to it

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bufiox

derp,types,util: use bufio Peek+Discard for allocation-free fast reads (#19067)

2026-03-24 10:52:20 -04:00

checkchange

all: remove AUTHORS file and references to it

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cibuild

all: remove AUTHORS file and references to it

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clientmetric

all: fix six tests that failed with -count=2

2026-04-13 18:52:57 -07:00

cloudenv

all: remove AUTHORS file and references to it

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cloudinfo

all: remove AUTHORS file and references to it

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cmpver

cmd/vet: add subtestnames analyzer; fix all existing violations

2026-04-05 15:52:51 -07:00

codegen

all: remove AUTHORS file and references to it

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cstruct

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ctxkey

all: remove AUTHORS file and references to it

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deephash

cmd/vet: add subtestnames analyzer; fix all existing violations

2026-04-05 15:52:51 -07:00

dirwalk

all: remove AUTHORS file and references to it

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dnsname

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

eventbus

cmd/vet: add subtestnames analyzer; fix all existing violations

2026-04-05 15:52:51 -07:00

execqueue

all: remove AUTHORS file and references to it

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expvarx

all: remove AUTHORS file and references to it

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goroutines

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

groupmember

all: remove AUTHORS file and references to it

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hashx

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

httphdr

all: use Go 1.26 things, run most gofix modernizers

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httpm

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

limiter

all: remove AUTHORS file and references to it

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lineiter

all: remove AUTHORS file and references to it

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lineread

all: remove AUTHORS file and references to it

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linuxfw

util/linuxfw: fix nil deref in nftables chain check

2026-04-14 07:45:01 -07:00

lru

all: remove AUTHORS file and references to it

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mak

all: remove AUTHORS file and references to it

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multierr

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must

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nocasemaps

all: remove AUTHORS file and references to it

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osdiag

util/osdiag: fix typo in comment (reciever -> receiver)

2026-03-23 12:54:38 +00:00

osshare

all: remove AUTHORS file and references to it

2026-01-23 15:49:45 -08:00

osuser

util/osuser: extend id command fallback for group IDs to freebsd

2026-03-09 08:39:07 +00:00

pidowner

all: remove AUTHORS file and references to it

2026-01-23 15:49:45 -08:00

pool

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

precompress

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progresstracking

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prompt

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qrcodes

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quarantine

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race

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racebuild

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rands

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reload

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ringlog

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safediff

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set

all: use Go 1.26 things, run most gofix modernizers

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singleflight

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slicesx

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

stringsx

all: remove AUTHORS file and references to it

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syspolicy

cmd/vet: add subtestnames analyzer; fix all existing violations

2026-04-05 15:52:51 -07:00

sysresources

all: remove AUTHORS file and references to it

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testenv

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topk

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

truncate

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usermetric

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vizerror

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00

winutil

all: remove AUTHORS file and references to it

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zstdframe

all: use Go 1.26 things, run most gofix modernizers

2026-03-06 13:32:03 -08:00