ci starts bisection 2025-07-11 21:15:11.57407196 +0000 UTC m=+72606.065645554
bisecting fixing commit since dccb07f2914cdab2ac3a5b6c98406f765acab803
building syzkaller on 4cf3f9b3f15d248d052cd369d23308c953d657d9
ensuring issue is reproducible on original commit dccb07f2914cdab2ac3a5b6c98406f765acab803

testing commit dccb07f2914cdab2ac3a5b6c98406f765acab803 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 10a138e6d2deddf2a70c9ddb9a9c89fbaf12955251ec3583d2bf09e3fd2a6cab
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
check whether we can drop unnecessary instrumentation
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit dccb07f2914cdab2ac3a5b6c98406f765acab803 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 232fb37493d61395262e77c7788d62847efeaf61dc0027eeaee1fbb78e010ed3
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
the bug reproduces without the instrumentation
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
kconfig minimization: base=4089 full=8006 leaves diff=2037
split chunks (needed=false): <2037>
split chunk #0 of len 2037 into 5 parts
testing without sub-chunk 1/5
disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit dccb07f2914cdab2ac3a5b6c98406f765acab803 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9f707caaffed00fd2f55f9a70587a1f20ac5bf44bffcd696749230bf3467fc84
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit dccb07f2914cdab2ac3a5b6c98406f765acab803 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9e205b90551ec2aff664f136015b5d25932330a6281a0595ac3d86b8d6f39883
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit dccb07f2914cdab2ac3a5b6c98406f765acab803 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0df1c8b790040d8bf41faa25bda6ec10e5e4e3fd46ffd98feb69094c86ffaa51
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit dccb07f2914cdab2ac3a5b6c98406f765acab803 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d397343adf64c965fb530d2743c8c90f3d4988e25e90ee2fbaf475ae59c22a76
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
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 dccb07f2914cdab2ac3a5b6c98406f765acab803 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 07a84668aa05bb6bc7b24288fed0d8223038e36f29d94e8ff735305f570cbc1f
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
the chunk can be dropped
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing current HEAD 40f92e79b0aabbf3575e371f9054657a421a3e79
testing commit 40f92e79b0aabbf3575e371f9054657a421a3e79 gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 69259a0c405dc22c2368244e7272241d816a61e833353c91c3fafa1aa85e04fd
all runs: crashed: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
representative crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed, types: [SYZ_FAILURE]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h13m59.29525216s (build: 43m52.206128108s, test: 23m43.498160329s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'block-6.16-20250710' of git://git.kernel.dk/linux
crash: SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
2025/07/11 22:28:47 parsed 1 programs
2025/07/11 22:28:47 [FATAL] failed to run ["./syz-executor" "setup" "fault" "binfmt_misc" "swap"]: exit status 67
mkdir(/syzcgroup) failed: 17
mount(binfmt_misc) failed: 16
write(/proc/sys/fs/binfmt_misc/register) failed: 17
SYZFAIL: write(/proc/sys/fs/binfmt_misc/register) failed
 (errno 17: File exists)