bisecting fixing commit since 4010a528219e01dd02e768b22168f7f0e78365ce building syzkaller on 9a4781d43abfb86fe8521cb6fb084519e237454c testing commit 4010a528219e01dd02e768b22168f7f0e78365ce compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 030d6b6724621dc857b1d0db70c6342e74649bae266c754ace8ec11300ea81cf run #0: crashed: KASAN: use-after-free Read in v4l2_fh_init run #1: crashed: BUG: sleeping function called from invalid context in lock_sock_nested run #2: crashed: KASAN: use-after-free Read in v4l2_fh_init run #3: crashed: KASAN: use-after-free Read in v4l2_fh_init run #4: crashed: KASAN: use-after-free Read in v4l2_fh_init run #5: crashed: KASAN: use-after-free Read in v4l2_fh_init run #6: crashed: KASAN: use-after-free Read in v4l2_fh_init run #7: crashed: KASAN: use-after-free Read in v4l2_fh_init run #8: crashed: KASAN: use-after-free Read in v4l2_fh_init run #9: crashed: KASAN: use-after-free Read in v4l2_fh_init run #10: crashed: BUG: sleeping function called from invalid context in lock_sock_nested run #11: crashed: KASAN: use-after-free Read in v4l2_fh_init run #12: crashed: KASAN: use-after-free Read in v4l2_fh_init run #13: crashed: KASAN: use-after-free Read in v4l2_fh_init run #14: crashed: KASAN: use-after-free Read in v4l2_fh_init run #15: crashed: KASAN: use-after-free Read in v4l2_fh_init run #16: crashed: KASAN: use-after-free Read in v4l2_fh_init run #17: crashed: KASAN: use-after-free Read in v4l2_fh_init run #18: crashed: KASAN: use-after-free Read in v4l2_fh_init run #19: crashed: KASAN: use-after-free Read in v4l2_fh_init testing current HEAD 9886142c7a2226439c1e3f7d9b69f9c7094c3ef6 testing commit 9886142c7a2226439c1e3f7d9b69f9c7094c3ef6 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: a39e74d6e5966cb21fc712e6837a6bd23a001cf8be8043d3428fc7ef0cc1498e run #0: crashed: INFO: rcu detected stall in corrupted run #1: boot failed: INFO: task hung in add_early_randomness run #2: boot failed: INFO: task hung in add_early_randomness run #3: boot failed: INFO: task hung in add_early_randomness run #4: boot failed: INFO: task hung in add_early_randomness run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK reproducer seems to be flaky Reproducer flagged being flaky revisions tested: 2, total time: 28m22.140960198s (build: 12m34.351677312s, test: 14m58.232154425s) the crash still happens on HEAD commit msg: Merge tag 'input-for-v5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input crash: INFO: rcu detected stall in corrupted rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P6 } 4 jiffies s: 2565 root: 0x0/T rcu: blocking rcu_node structures (internal RCU debug): Bluetooth: hci2: command 0x041b tx timeout Bluetooth: hci4: command 0x041b tx timeout Bluetooth: hci5: command 0x041b tx timeout