bisecting fixing commit since 3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3
building syzkaller on 04201c0669446145fd9c347c5538da0ca13ff29b
testing commit 3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3 with gcc (GCC) 10.2.1 20210217
kernel signature: fb2cfc42a18753ed3620595b434123ab39fa71887fff8f7b2fdec4b7d665b8a7
all runs: crashed: UBSAN: shift-out-of-bounds in est_timer
testing current HEAD 7a7fd0de4a9804299793e564a555a49c1fc924cb
testing commit 7a7fd0de4a9804299793e564a555a49c1fc924cb with gcc (GCC) 10.2.1 20210217
kernel signature: 1d73de77347008c74ff83fd1782947956adac4f96a906f85c4198cfa7a1847ae
run #0: crashed: unregister_netdevice: waiting for DEV to become free
run #1: OK
run #2: OK
run #3: OK
run #4: OK
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: 28m29.402987401s (build: 12m32.575492966s, test: 15m20.824873066s)
the crash still happens on HEAD
commit msg: Merge branch 'kmap-conversion-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for sit0 to become free. Usage count = -1