bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on cb93dc6ac64225e09f44bac6c6cce1dae1b248b0
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 621590116309b7a5bff97d0d29d46cc245485fc9eb2113686fb48359fe7b6a3a
all runs: crashed: BUG: unable to handle kernel paging request in vga16fb_fillrect
testing current HEAD ed99bf0e81b558df39f7db2fa96d0228be4198c6
testing commit ed99bf0e81b558df39f7db2fa96d0228be4198c6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7954544a862ffa5565401dd1f09550e9f9f9a12a599364af910cafb77b133b82
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m47.20865896s (build: 19m34.753422788s, test: 6m34.574855626s)
the crash still happens on HEAD
commit msg: Linux 4.14.250
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1