ci2 starts bisection 2026-08-27 08:02:05.191639469 +0000 UTC m=+69696.166501403
bisecting fixing commit since 924b4a879cbb75aef37c160b955b92f6894b11a4
building syzkaller on 1d2f35898f2e0325486423250d5303b6bc05adcd
ensuring issue is reproducible on original commit 924b4a879cbb75aef37c160b955b92f6894b11a4

testing commit 924b4a879cbb75aef37c160b955b92f6894b11a4 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: b7469c7710dfd4c9d82f71dd231a5a163ebe982a05b0c8b524588d7b16d4a620
run #0: crashed: INFO: rcu detected stall in worker_thread
run #1: crashed: INFO: rcu detected stall in worker_thread
run #2: crashed: INFO: rcu detected stall in worker_thread
run #3: crashed: WARNING in rcu_check_gp_start_stall
run #4: crashed: INFO: rcu detected stall in worker_thread
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: crashed: INFO: rcu detected stall in corrupted
run #13: crashed: WARNING in rcu_check_gp_start_stall
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: OK
run #16: crashed: INFO: rcu detected stall in worker_thread
run #17: OK
run #18: OK
run #19: crashed: INFO: rcu detected stall in corrupted
representative crash: INFO: rcu detected stall in worker_thread, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit 924b4a879cbb75aef37c160b955b92f6894b11a4 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 7afb66367415b94cb9f51f77632b57dfbe2bb37749669ed1c350b64437fdc440
all runs: OK
false negative chance: 0.001
kconfig minimization: base=3913 full=7801 leaves diff=2162
split chunks (needed=false): <2162>
split chunk #0 of len 2162 into 5 parts
testing without sub-chunk 1/5
testing commit 924b4a879cbb75aef37c160b955b92f6894b11a4 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: c82d10412e1796418b603e1edb2abcec0d3ad3d3b3fa861eed1b82a1aeb1b777
run #0: crashed: WARNING in rcu_check_gp_start_stall
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: OK
representative crash: INFO: rcu detected stall in corrupted, types: [HANG WARNING]
testing without sub-chunk 2/5
testing commit 924b4a879cbb75aef37c160b955b92f6894b11a4 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 1f5a1d291f6897207c065d0a66c1e630dd1cc06083a1af558acb328e46b828d3
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
testing commit 924b4a879cbb75aef37c160b955b92f6894b11a4 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 1e8baf97403379c1c90836aeb976b899fe1cf9f6874e973f0482c16abe78c964
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
testing commit 924b4a879cbb75aef37c160b955b92f6894b11a4 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 4954775fc50d85033ed47d8dcd376673398c26c653aee6e93a7ab34a0097841b
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: WARNING in rcu_check_gp_start_stall
run #2: crashed: WARNING in rcu_check_gp_start_stall
run #3: crashed: INFO: rcu detected stall in sys_rt_sigreturn
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: OK
run #7: OK
run #8: crashed: WARNING in rcu_check_gp_start_stall
run #9: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: crashed: WARNING in rcu_check_gp_start_stall
run #15: OK
run #16: OK
run #17: crashed: WARNING in rcu_check_gp_start_stall
run #18: crashed: WARNING in rcu_check_gp_start_stall
run #19: OK
representative crash: WARNING in rcu_check_gp_start_stall, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 5/5
testing commit 924b4a879cbb75aef37c160b955b92f6894b11a4 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: d19e2e480af25af55af3ddd914cb9e904667a536c189ba865092700b6298472b
repro testing failure: failed to create VM pool: failed to create GCE image: failed to get create image operation operation-1787825844159-65a04a45c8477-3abc2b22-deec0c89: googleapi: got HTTP response code 502 with body: <!DOCTYPE html>
<html lang=en>
  <meta charset=utf-8>
  <meta name=viewport content="initial-scale=1, minimum-scale=1, width=device-width">
  <title>Error 502 (Server Error)!!1</title>
  <style>
    *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/branding/googlelogo/1x/googlelogo_color_150x54dp.png) no-repeat;margin-left:-5px}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:54px;width:150px}
  </style>
  <a href=//www.google.com/><span id=logo aria-label=Google></span></a>
  <p><b>502.</b> <ins>That’s an error.</ins>
  <p>The server encountered a temporary error and could not complete your request.<p>Please try again in 30 seconds.  <ins>That’s all we know.</ins>

reproducer is flaky (0.50 repro chance estimate)
revisions tested: 7, total time: 2h16m21.445148978s (build: 57m52.212695408s, test: 1h10m11.018062919s)
error: config minimization failed: repro testing failure: failed to create VM pool: failed to create GCE image: failed to get create image operation operation-1787825844159-65a04a45c8477-3abc2b22-deec0c89: googleapi: got HTTP response code 502 with body: <!DOCTYPE html>
<html lang=en>
  <meta charset=utf-8>
  <meta name=viewport content="initial-scale=1, minimum-scale=1, width=device-width">
  <title>Error 502 (Server Error)!!1</title>
  <style>
    *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/branding/googlelogo/1x/googlelogo_color_150x54dp.png) no-repeat;margin-left:-5px}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:54px;width:150px}
  </style>
  <a href=//www.google.com/><span id=logo aria-label=Google></span></a>
  <p><b>502.</b> <ins>That’s an error.</ins>
  <p>The server encountered a temporary error and could not complete your request.<p>Please try again in 30 seconds.  <ins>That’s all we know.</ins>