bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on cb93dc6ac64225e09f44bac6c6cce1dae1b248b0
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 25b0153cb2aff06d787f2a75afd4e87a94065d3c9513ab755503e7c08fd63088
all runs: crashed: BUG: unable to handle kernel paging request in vga16fb_fillrect
testing current HEAD 8034e99d1a010a795b979582c0b2370584d8abf4
testing commit 8034e99d1a010a795b979582c0b2370584d8abf4
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7b3c7faa364efd9404cfc68d6f4e4a0b49ee0116f0db743036ff1d2744f180a4
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 31m18.807228574s (build: 23m56.314817847s, test: 6m34.348997428s)
the crash still happens on HEAD
commit msg: Linux 4.14.266
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1