bisecting fixing commit since 9f4ad9e425a1d3b6a34617b8ea226d56a119a717
building syzkaller on 2a82f1b39f0c4d6c8c45fe4baf7cdd555c9e4af8
testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 4885757e898fb79fd5ebca1fc16a5ca08653c2f4f8d45897ae79f537f0c8b2f0
all runs: crashed: KASAN: null-ptr-deref Write in rhashtable_free_and_destroy
testing current HEAD 180eca540ae06246d594bdd8d8213426a259cc8c
testing commit 180eca540ae06246d594bdd8d8213426a259cc8c
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 060a3a34777a1acfa489dfa5c1dbda222eff35d78bb944e71255637e160bb518
all runs: crashed: KASAN: null-ptr-deref Write in rhashtable_free_and_destroy
revisions tested: 2, total time: 20m55.509026342s (build: 12m45.533957368s, test: 7m19.349876954s)
the crash still happens on HEAD
commit msg: Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
crash: KASAN: null-ptr-deref Write in rhashtable_free_and_destroy
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:70 [inline]
BUG: KASAN: null-ptr-deref in try_to_grab_pending.part.0+0x1e/0x5a0 kernel/workqueue.c:1275
Write of size 8 at addr 0000000000000088 by task kworker/0:4/6820

CPU: 0 PID: 6820 Comm: kworker/0:4 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events cfg80211_destroy_iface_wk
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:446 [inline]
 kasan_report.cold+0x66/0xdf mm/kasan/report.c:459
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:70 [inline]
 try_to_grab_pending.part.0+0x1e/0x5a0 kernel/workqueue.c:1275
 __cancel_work_timer+0x9c/0x460 kernel/workqueue.c:3129
 rhashtable_free_and_destroy+0x22/0x6f0 lib/rhashtable.c:1137
 mesh_table_free net/mac80211/mesh_pathtbl.c:73 [inline]
 mesh_pathtbl_unregister+0x3d/0xa0 net/mac80211/mesh_pathtbl.c:815
 unregister_netdevice_many+0xa92/0x1500 net/core/dev.c:11067
 unregister_netdevice_queue+0x26b/0x330 net/core/dev.c:10984
 unregister_netdevice include/linux/netdevice.h:2988 [inline]
 _cfg80211_unregister_wdev+0x3d6/0x670 net/wireless/core.c:1126
 ieee80211_if_remove+0x1ab/0x310 net/mac80211/iface.c:2088
 ieee80211_del_iface+0x9/0x10 net/mac80211/cfg.c:144
 rdev_del_virtual_intf net/wireless/rdev-ops.h:57 [inline]
 cfg80211_destroy_ifaces+0x261/0x640 net/wireless/core.c:354
 cfg80211_destroy_iface_wk+0x15/0x20 net/wireless/core.c:368
 process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
 worker_thread+0x598/0x1040 kernel/workqueue.c:2444
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
==================================================================