ci starts bisection 2026-07-22 12:47:33.515216762 +0000 UTC m=+30095.105603849
bisecting fixing commit since 96e7f9122aae0ed000ee321f324b812a447906d9
building syzkaller on 43bfcdb07c3552e4664e1029672054ac0924d543
ensuring issue is reproducible on original commit 96e7f9122aae0ed000ee321f324b812a447906d9

testing commit 96e7f9122aae0ed000ee321f324b812a447906d9 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: e44f524923b3aac8b8857f05a53453f4796d41bcf152b8ebcee1dd7fd427c7b9
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
check whether we can drop unnecessary instrumentation
disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 96e7f9122aae0ed000ee321f324b812a447906d9 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 75304ef440e1810acdf974670e5e53cfb05d0faef9fb70ec1203589cf1a78efd
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the bug reproduces without the instrumentation
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
kconfig minimization: base=4147 full=8586 leaves diff=2143
split chunks (needed=false): <2143>
split chunk #0 of len 2143 into 5 parts
testing without sub-chunk 1/5
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit 96e7f9122aae0ed000ee321f324b812a447906d9 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: b83207466f32b3ac21d612467c0089bed97adf528547bc3878ac62e55d72c202
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit 96e7f9122aae0ed000ee321f324b812a447906d9 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 566fd804e96502d9f5d3e9cd0a62dae24c1abbae267f8f8d471dee6afa823db6
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit 96e7f9122aae0ed000ee321f324b812a447906d9 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: f0eec125919199916bb28854eeb3eb8dcca1a6f375da08309b2011a1a8800cd9
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit 96e7f9122aae0ed000ee321f324b812a447906d9 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 9da2694a57fc11782a5b4f69129dd616d01e5256e776927aceccc3b91b79ff24
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit 96e7f9122aae0ed000ee321f324b812a447906d9 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 757da94b5853a378d760113df6c649290060f6c1fa64c3f822f811a9bfa72260
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing current HEAD ba712ecfd942b68b21a4b0a5daaf72f6616cc66d
testing commit ba712ecfd942b68b21a4b0a5daaf72f6616cc66d gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 757031e12d03bf19d6624a4b99207e93c5a0ee1e557ac35685ee43b9237e8f06
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h35m59.260104945s (build: 1h23m19.846568617s, test: 39m36.982138384s)
crash still not fixed or there were kernel test errors
commit msg: ppp: annotate concurrent dev->stats accesses
crash: lost connection to test machine