bisecting fixing commit since f4cc0ed9b2c72687303b035379c5824a02224354
building syzkaller on 7509bf360eba1461ac6059e4cacfbc29c9d2d4c7
testing commit f4cc0ed9b2c72687303b035379c5824a02224354
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3040e7e96f047622a431a23a4e089a7b87546860b045c524a54361628be55315
run #0: crashed: BUG: soft lockup in corrupted
run #1: crashed: BUG: soft lockup in corrupted
run #2: crashed: BUG: soft lockup in corrupted
run #3: crashed: BUG: soft lockup in sendfile64
run #4: crashed: BUG: soft lockup in corrupted
run #5: crashed: BUG: soft lockup in corrupted
run #6: crashed: BUG: soft lockup in ext4_file_write_iter
run #7: crashed: BUG: soft lockup in corrupted
run #8: crashed: BUG: soft lockup in corrupted
run #9: crashed: BUG: soft lockup in corrupted
run #10: crashed: BUG: soft lockup in corrupted
run #11: crashed: BUG: soft lockup in corrupted
run #12: crashed: BUG: soft lockup in sendfile64
run #13: crashed: BUG: soft lockup in corrupted
run #14: crashed: BUG: soft lockup in corrupted
run #15: crashed: BUG: soft lockup in sendfile64
run #16: crashed: BUG: soft lockup in sendfile64
run #17: crashed: BUG: soft lockup in corrupted
run #18: crashed: BUG: soft lockup in corrupted
run #19: crashed: BUG: soft lockup in corrupted
testing current HEAD 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
testing commit 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a7e16b95459ed4f224c94c89723d7be0a5f0afcd73a0be5121c1da96ad30482d
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m45.499583819s (build: 20m20.324734781s, test: 6m48.126937232s)
the crash still happens on HEAD
commit msg: Linux 4.14.247
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1