ci starts bisection 2023-04-30 21:38:26.617528187 +0000 UTC m=+174175.179602711
bisecting fixing commit since 952923ddc01120190dcf671e7b354364ce1d1362
building syzkaller on c885789257c76ea4479ea36282f5e0a2c7861e26
ensuring issue is reproducible on original commit 952923ddc01120190dcf671e7b354364ce1d1362

testing commit 952923ddc01120190dcf671e7b354364ce1d1362 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: bcb33838a2da926c9ef0dfbd67c4b227431753b98cb6f05ed67a2ff6e601fac2
run #0: crashed: WARNING in blk_register_tracepoints
run #1: crashed: WARNING in blk_register_tracepoints
run #2: crashed: WARNING in blk_register_tracepoints
run #3: crashed: WARNING in blk_register_tracepoints
run #4: crashed: WARNING in blk_register_tracepoints
run #5: crashed: WARNING in blk_register_tracepoints
run #6: crashed: WARNING in blk_register_tracepoints
run #7: crashed: WARNING in blk_register_tracepoints
run #8: crashed: WARNING in blk_register_tracepoints
run #9: boot failed: INFO: task hung in add_early_randomness
run #10: boot failed: INFO: task hung in add_early_randomness
run #11: boot failed: INFO: task hung in add_early_randomness
run #12: boot failed: INFO: task hung in add_early_randomness
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing current HEAD 58390c8ce1bddb6c623f62e7ed36383e7fa5c02f
testing commit 58390c8ce1bddb6c623f62e7ed36383e7fa5c02f gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a746cfc676063f51856492fc5e06ee39afe459837e35200ac1decfc961cd991b
run #0: crashed: WARNING in blk_register_tracepoints
run #1: crashed: WARNING in blk_register_tracepoints
run #2: crashed: WARNING in blk_register_tracepoints
run #3: crashed: WARNING in blk_register_tracepoints
run #4: crashed: WARNING in blk_register_tracepoints
run #5: crashed: WARNING in blk_register_tracepoints
run #6: crashed: unregister_netdevice: waiting for DEV to become free
run #7: crashed: unregister_netdevice: waiting for DEV to become free
run #8: crashed: unregister_netdevice: waiting for DEV to become free
run #9: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 36m35.613084342s (build: 12m52.615083571s, test: 22m41.710029587s)
the crash still happens on HEAD
commit msg: Merge tag 'iommu-updates-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for syz_tun to become free. Usage count = 2
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4070 [inline]
 netdev_tracker_alloc include/linux/netdevice.h:4082 [inline]
 fib6_nh_init+0x4ad/0x18c0 net/ipv6/route.c:3613
 ip6_route_info_create+0xe9a/0x1830 net/ipv6/route.c:3791
 ip6_route_add+0x13/0xf0 net/ipv6/route.c:3835
 addrconf_prefix_route+0x299/0x410 net/ipv6/addrconf.c:2425
 fixup_permanent_addr net/ipv6/addrconf.c:3500 [inline]
 addrconf_permanent_addr net/ipv6/addrconf.c:3524 [inline]
 addrconf_notify+0xc33/0x12d0 net/ipv6/addrconf.c:3596
 notifier_call_chain+0x94/0x2a0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:1973 [inline]
 call_netdevice_notifiers net/core/dev.c:1987 [inline]
 __dev_notify_flags+0xd0/0x240 net/core/dev.c:8605
 dev_change_flags+0xf5/0x160 net/core/dev.c:8643
 do_setlink+0x873/0x3050 net/core/rtnetlink.c:2836
 __rtnl_newlink+0x94d/0x1520 net/core/rtnetlink.c:3626
 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3673
 rtnetlink_rcv_msg+0x32d/0x9f0 net/core/rtnetlink.c:6395
 netlink_rcv_skb+0x126/0x380 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x433/0x710 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x78c/0xc40 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xbc/0x150 net/socket.c:747