bisecting fixing commit since 52e44129fba5cfc4e351fdb5e45849afc74d9a53
building syzkaller on bfeda1b1077c9ffe6f9597cbae4b6a5d747b4695
testing commit 52e44129fba5cfc4e351fdb5e45849afc74d9a53 with gcc (GCC) 10.2.1 20210217
kernel signature: 98a1d4864b19ad23dd9531bcf7e6a1c6f129d48811b813f1fbaa59d1d0d00b90
run #0: crashed: WARNING in firmware_fallback_sysfs
run #1: crashed: WARNING in firmware_fallback_sysfs
run #2: crashed: WARNING in firmware_fallback_sysfs
run #3: crashed: WARNING in firmware_fallback_sysfs
run #4: crashed: WARNING in firmware_fallback_sysfs
run #5: crashed: WARNING in firmware_fallback_sysfs
run #6: crashed: WARNING in firmware_fallback_sysfs
run #7: crashed: WARNING in firmware_fallback_sysfs
run #8: crashed: WARNING in firmware_fallback_sysfs
run #9: crashed: WARNING in firmware_fallback_sysfs
run #10: crashed: WARNING in firmware_fallback_sysfs
run #11: crashed: WARNING in firmware_fallback_sysfs
run #12: crashed: WARNING in firmware_fallback_sysfs
run #13: crashed: WARNING in firmware_fallback_sysfs
run #14: crashed: WARNING in firmware_fallback_sysfs
run #15: crashed: WARNING in firmware_fallback_sysfs
run #16: crashed: WARNING in firmware_fallback_sysfs
run #17: crashed: WARNING in firmware_fallback_sysfs
run #18: OK
run #19: OK
testing current HEAD 28183dbf54edba614a90ceb6a1e9464b27845309
testing commit 28183dbf54edba614a90ceb6a1e9464b27845309 with gcc (GCC) 10.2.1 20210217
kernel signature: 0cd474870952b47d257202bd78744da4daf507c21d1cf7c9bf6b362eea20bce9
all runs: crashed: WARNING in firmware_fallback_sysfs
revisions tested: 2, total time: 36m49.961126214s (build: 13m22.616481784s, test: 22m40.332555414s)
the crash still happens on HEAD
commit msg: Merge tag 'driver-core-5.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
crash: WARNING in firmware_fallback_sysfs
------------[ cut here ]------------
sysfs group 'power' not found for kobject 'ueagle-atm!adi930.fw'
WARNING: CPU: 1 PID: 10219 at fs/sysfs/group.c:279 sysfs_remove_group+0xf2/0x140 fs/sysfs/group.c:279
Modules linked in:
CPU: 1 PID: 10219 Comm: kworker/1:8 Not tainted 5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events request_firmware_work_func
RIP: 0010:sysfs_remove_group+0xf2/0x140 fs/sysfs/group.c:279
Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 3e 48 8b 33 48 c7 c7 20 2c bb 88 e8 ba 6d 32 06 <0f> 0b 48 83 c4 08 5b 5d 41 5c c3 e8 2e 87 d0 ff e9 26 ff ff ff 48
RSP: 0018:ffffc9000b08fac8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffffffff89149f60 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52001611f4b
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880ba11fa5b
R10: ffffed1017423f4b R11: 6f6620646e756f66 R12: ffff8880462db008
R13: 1ffff92001611f64 R14: ffff88802314f200 R15: 00000000fffffff5
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffebd646fe8 CR3: 00000000121a6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_del+0x1f4/0xc10 drivers/base/core.c:3485
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:543 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:581 [inline]
 firmware_fallback_sysfs+0x7f5/0xb90 drivers/base/firmware_loader/fallback.c:657
 _request_firmware+0x79b/0xb80 drivers/base/firmware_loader/main.c:833
 request_firmware_work_func+0xd7/0x230 drivers/base/firmware_loader/main.c:1079
 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275
 worker_thread+0x598/0xf80 kernel/workqueue.c:2421
 kthread+0x36f/0x450 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294