ci starts bisection 2026-09-26 10:11:58.558553899 +0000 UTC m=+14165.244484830
bisecting cause commit starting from fe2ec83746e501645709761605c2464a44fd2929
building syzkaller on abce12164965bc4439aad38d787d980496e3f106
ensuring issue is reproducible on original commit fe2ec83746e501645709761605c2464a44fd2929

testing commit fe2ec83746e501645709761605c2464a44fd2929 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: f33c9fe3ca1af46c194c9d261020b53cb41e12b5297f386bc8c996e39de0c189
all runs: crashed: possible deadlock in anon_pipe_prefill_and_lock
representative crash: possible deadlock in anon_pipe_prefill_and_lock, types: [LOCKDEP]
check whether we can drop unnecessary instrumentation
disabling configs for [kasan atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit fe2ec83746e501645709761605c2464a44fd2929 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 658d8f3e89368afcfb197d5e8ef1a9bda1b7d74fad0d0b7f0ada943881fa6d46
all runs: crashed: possible deadlock in anon_pipe_prefill_and_lock
representative crash: possible deadlock in anon_pipe_prefill_and_lock, types: [LOCKDEP]
the bug reproduces without the instrumentation
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
kconfig minimization: base=4168 full=8651 leaves diff=2139
split chunks (needed=false): <2139>
split chunk #0 of len 2139 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ubsan bug_or_warning kasan atomic_sleep hang memleak], they are not needed
testing commit fe2ec83746e501645709761605c2464a44fd2929 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 7a9713384414a8b5e8e9f85b62ad56427bbb7c0c56ef5c450c24d8f736026c66
run #0: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #1: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #2: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #3: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #4: crashed: possible deadlock in kernfs_fop_write_iter
run #5: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #6: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #7: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #8: crashed: possible deadlock in anon_pipe_prefill_and_lock
run #9: crashed: possible deadlock in anon_pipe_prefill_and_lock
representative crash: possible deadlock in anon_pipe_prefill_and_lock, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed
testing commit fe2ec83746e501645709761605c2464a44fd2929 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 2043ce3c501007adf8d2cafdf2ec39dffdfec42cf69130a4a67e6a569cb90ca4
all runs: crashed: possible deadlock in anon_pipe_prefill_and_lock
representative crash: possible deadlock in anon_pipe_prefill_and_lock, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ubsan bug_or_warning kasan atomic_sleep hang memleak], they are not needed
testing commit fe2ec83746e501645709761605c2464a44fd2929 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 69f3746a7202ce8d32f058c1e82b2f5f8a5967daea178785a2b5a6cbefffc3c5
all runs: crashed: possible deadlock in anon_pipe_prefill_and_lock
representative crash: possible deadlock in anon_pipe_prefill_and_lock, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed
testing commit fe2ec83746e501645709761605c2464a44fd2929 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: b81c9e5f8cdf46b551feb9c6226cd275ece5e94331d9e9a7b46ffd35e79e4051
all runs: crashed: possible deadlock in anon_pipe_prefill_and_lock
representative crash: possible deadlock in anon_pipe_prefill_and_lock, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed
testing commit fe2ec83746e501645709761605c2464a44fd2929 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 658fdf15e662ebd0b9ae14a63dd1676da57ca891d2299da5db87f8fa3e6e3e19
all runs: crashed: possible deadlock in anon_pipe_prefill_and_lock
representative crash: possible deadlock in anon_pipe_prefill_and_lock, types: [LOCKDEP]
the chunk can be dropped
disabling configs for [memleak ubsan bug_or_warning kasan atomic_sleep hang], they are not needed
picked [v7.2 v7.1 v7.0 v6.18 v6.16 v6.14 v6.12 v6.10 v6.7 v6.4 v6.1 v5.18 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 45 release tags
testing release v7.2
testing commit 8d3ae59288f1e7d58d76558a6ee96d533bc5019f gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: b9a9610af261f50cf0f30d66d9b1ec42b13d9cdfbadf09ba1180df90742a932c
all runs: crashed: possible deadlock in anon_pipe_write
representative crash: possible deadlock in anon_pipe_write, types: [LOCKDEP]
testing release v7.1
testing commit 8cd9520d35a6c38db6567e97dd93b1f11f185dc6 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 81b6bc2440e97b9450cc90dd73d12cd4fad8f23c4e024da2507eb5d12f30979f
all runs: crashed: possible deadlock in anon_pipe_write
representative crash: possible deadlock in anon_pipe_write, types: [LOCKDEP]
testing release v7.0
testing commit 028ef9c96e96197026887c0f092424679298aae8 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 65d4693d681cc8beea6557352bfee94deee7f1c5bd371cd551478965784eed27
all runs: crashed: possible deadlock in anon_pipe_write
representative crash: possible deadlock in anon_pipe_write, types: [LOCKDEP]
testing release v6.18
testing commit 7d0a66e4bb9081d75c82ec4957c50034cb0ea449 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 09d39b0f9de26a858c7fd5f2d9672dc53d7ab273381ce7747004b7d46dbe70cf
all runs: crashed: possible deadlock in anon_pipe_write
representative crash: possible deadlock in anon_pipe_write, types: [LOCKDEP]
testing release v6.16
testing commit 038d61fd642278bab63ee8ef722c50d10ab01e8f gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 5d10c27203195e24d2226b6a0a1d5d772baa615b0e6109ca4cbae429b2be2278
all runs: crashed: possible deadlock in anon_pipe_write
representative crash: possible deadlock in anon_pipe_write, types: [LOCKDEP]
testing release v6.14
testing commit 38fec10eb60d687e30c8c6b5420d86e8149f7557 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 49304042abe09486b822530c01407af22a42e1d4e97b824ae886102b7589b2ad
all runs: crashed: possible deadlock in pipe_write
representative crash: possible deadlock in pipe_write, types: [LOCKDEP]
testing release v6.12
testing commit adc218676eef25575469234709c2d87185ca223a gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: a1d24785b282c0aa5d38ce7efa87b5b393e3ffadac6905132281593782699f91
all runs: crashed: possible deadlock in pipe_write
representative crash: possible deadlock in pipe_write, types: [LOCKDEP]
testing release v6.10
testing commit 0c3836482481200ead7b416ca80c68a29cfdaabd gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 8fd3d538a4468d21a46b226692b96f3c746d169b2f295ef6bb69b58d7447bd9d
all runs: crashed: possible deadlock in pipe_write
representative crash: possible deadlock in pipe_write, types: [LOCKDEP]
testing release v6.7
testing commit 0dd3ee31125508cd67f7e7172247f05b7fd1753a gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 215029c4af9e116ee7d1f18f16af44a75ad2105350155f2a01935eaa4e2b5dec
all runs: crashed: possible deadlock in pipe_write
representative crash: possible deadlock in pipe_write, types: [LOCKDEP]
testing release v6.4
testing commit 6995e2de6891c724bfeb2db33d7b87775f913ad1 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 145e1e16b7e1a639024190ccfd0e78f0252bfb67be2249acd819a22c14894a99
run #0: ignore: lost connection to test machine
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
false negative chance: 0.000
# git bisect start 0dd3ee31125508cd67f7e7172247f05b7fd1753a 6995e2de6891c724bfeb2db33d7b87775f913ad1
Bisecting: 24247 revisions left to test after this (roughly 15 steps)
[e2c874f999f079e3ec9b8071e92c87d57aded3b6] Merge tag 'platform-drivers-x86-v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

testing commit e2c874f999f079e3ec9b8071e92c87d57aded3b6 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 604ca9436e2f301aab143ce8e1c23e08ed08a6e36118cea8a482ed3514d49e5e
all runs: OK
false negative chance: 0.000
# git bisect good e2c874f999f079e3ec9b8071e92c87d57aded3b6
Bisecting: 12118 revisions left to test after this (roughly 14 steps)
[9d6c80f8054f75326939b947185ec47ba3755d42] Merge tag 'regulator-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

testing commit 9d6c80f8054f75326939b947185ec47ba3755d42 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: f314c8c9219e36fe9d17ea0f329d251799f5abe6bb4a46992bd9bb7ee3427487
all runs: crashed: possible deadlock in pipe_write
representative crash: possible deadlock in pipe_write, types: [LOCKDEP]
# git bisect bad 9d6c80f8054f75326939b947185ec47ba3755d42
Bisecting: 6068 revisions left to test after this (roughly 13 steps)
[adac06fad3333f9b9638ad9271346065d69e9c79] bcachefs: Verbose on by default when CONFIG_BCACHEFS_DEBUG=y

revisions tested: 19, total time: 13h53m1.446663668s (build: 10h17m54.308833595s, test: 2h13m46.95993241s)
error: bisection is taking too long (>12h0m0s), aborting