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09ac2694b0
linux/drivers/net/wireless
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YueHaibing 09ac2694b0 at76c50x-usb: Don't register led_trigger if usb_register_driver failed 
Syzkaller report this:

[ 1213.468581] BUG: unable to handle kernel paging request at fffffbfff83bf338
[ 1213.469530] #PF error: [normal kernel read fault]
[ 1213.469530] PGD 237fe4067 P4D 237fe4067 PUD 237e60067 PMD 1c868b067 PTE 0
[ 1213.473514] Oops: 0000 [#1] SMP KASAN PTI
[ 1213.473514] CPU: 0 PID: 6321 Comm: syz-executor.0 Tainted: G         C        5.1.0-rc3+ #8
[ 1213.473514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
[ 1213.473514] RIP: 0010:strcmp+0x31/0xa0
[ 1213.473514] Code: 00 00 00 00 fc ff df 55 53 48 83 ec 08 eb 0a 84 db 48 89 ef 74 5a 4c 89 e6 48 89 f8 48 89 fa 48 8d 6f 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 50 48 89 f0 48 89 f2 0f b6 5d
[ 1213.473514] RSP: 0018:ffff8881f2b7f950 EFLAGS: 00010246
[ 1213.473514] RAX: 1ffffffff83bf338 RBX: ffff8881ea6f7240 RCX: ffffffff825350c6
[ 1213.473514] RDX: 0000000000000000 RSI: ffffffffc1ee19c0 RDI: ffffffffc1df99c0
[ 1213.473514] RBP: ffffffffc1df99c1 R08: 0000000000000001 R09: 0000000000000004
[ 1213.473514] R10: 0000000000000000 R11: ffff8881de353f00 R12: ffff8881ee727900
[ 1213.473514] R13: dffffc0000000000 R14: 0000000000000001 R15: ffffffffc1eeaaf0
[ 1213.473514] FS:  00007fa66fa01700(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000
[ 1213.473514] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1213.473514] CR2: fffffbfff83bf338 CR3: 00000001ebb9e005 CR4: 00000000007606f0
[ 1213.473514] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1213.473514] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1213.473514] PKRU: 55555554
[ 1213.473514] Call Trace:
[ 1213.473514]  led_trigger_register+0x112/0x3f0
[ 1213.473514]  led_trigger_register_simple+0x7a/0x110
[ 1213.473514]  ? 0xffffffffc1c10000
[ 1213.473514]  at76_mod_init+0x77/0x1000 [at76c50x_usb]
[ 1213.473514]  do_one_initcall+0xbc/0x47d
[ 1213.473514]  ? perf_trace_initcall_level+0x3a0/0x3a0
[ 1213.473514]  ? kasan_unpoison_shadow+0x30/0x40
[ 1213.473514]  ? kasan_unpoison_shadow+0x30/0x40
[ 1213.473514]  do_init_module+0x1b5/0x547
[ 1213.473514]  load_module+0x6405/0x8c10
[ 1213.473514]  ? module_frob_arch_sections+0x20/0x20
[ 1213.473514]  ? kernel_read_file+0x1e6/0x5d0
[ 1213.473514]  ? find_held_lock+0x32/0x1c0
[ 1213.473514]  ? cap_capable+0x1ae/0x210
[ 1213.473514]  ? __do_sys_finit_module+0x162/0x190
[ 1213.473514]  __do_sys_finit_module+0x162/0x190
[ 1213.473514]  ? __ia32_sys_init_module+0xa0/0xa0
[ 1213.473514]  ? __mutex_unlock_slowpath+0xdc/0x690
[ 1213.473514]  ? wait_for_completion+0x370/0x370
[ 1213.473514]  ? vfs_write+0x204/0x4a0
[ 1213.473514]  ? do_syscall_64+0x18/0x450
[ 1213.473514]  do_syscall_64+0x9f/0x450
[ 1213.473514]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1213.473514] RIP: 0033:0x462e99
[ 1213.473514] Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[ 1213.473514] RSP: 002b:00007fa66fa00c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1213.473514] RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
[ 1213.473514] RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003
[ 1213.473514] RBP: 00007fa66fa00c70 R08: 0000000000000000 R09: 0000000000000000
[ 1213.473514] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa66fa016bc
[ 1213.473514] R13: 00000000004bcefa R14: 00000000006f6fb0 R15: 0000000000000004

If usb_register failed, no need to call led_trigger_register_simple.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 1264b95146 ("at76c50x-usb: add driver")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2019-04-25 19:52:14 +03:00
..
admtek
ath Merge ath-next from git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git 2019-04-19 10:20:10 +03:00
atmel at76c50x-usb: Don't register led_trigger if usb_register_driver failed 2019-04-25 19:52:14 +03:00
broadcom b43: Remove empty function lpphy_papd_cal() 2019-04-25 19:51:16 +03:00
cisco Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-12-27 13:53:32 -08:00
intel iwlwifi: dbg_ini: set dump bit only when trigger collection is certain 2019-04-19 10:27:34 +03:00
intersil orinoco : Replace function name in string with __func__ 2019-02-19 17:17:13 +02:00
marvell mwl8k: fix error handling in mwl8k_post_cmd() 2019-04-25 19:51:46 +03:00
mediatek mt76x02: avoid status_list.lock and sta->rate_ctrl_lock dependency 2019-04-12 21:32:40 +03:00
quantenna qtnfmac: replace qtnf_cmd_acl_data_size() with struct_size() 2019-04-04 19:38:36 +03:00
ralink rt2x00mmio: remove legacy comment 2019-04-25 19:43:09 +03:00
realtek rtlwifi: rtl8188ee: Remove extraneous file 2019-04-18 16:08:23 +03:00
rsi rsi: miscallaneous changes for 9116 and common 2019-04-25 19:44:29 +03:00
st net: cw1200: fix a NULL pointer dereference 2019-04-25 19:40:09 +03:00
ti Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-02-08 15:00:17 -08:00
zydas zd1211rw: use struct_size() helper 2019-04-25 19:49:50 +03:00
Kconfig mac80211-next: rtnetlink wifi simulation device 2018-12-05 15:31:31 +01:00
mac80211_hwsim.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-04-17 11:26:25 -07:00
mac80211_hwsim.h mac80211_hwsim: allow configurable cipher types 2018-11-09 11:36:15 +01:00
Makefile mac80211-next: rtnetlink wifi simulation device 2018-12-05 15:31:31 +01:00
ray_cs.c ray_cs: use remove_proc_subtree to simplify procfs code 2019-04-25 19:38:52 +03:00
ray_cs.h
rayctl.h
rndis_wlan.c rndis_wlan: use struct_size() helper 2019-04-25 19:37:44 +03:00
virt_wifi.c virt_wifi: Remove REGULATORY_WIPHY_SELF_MANAGED 2019-02-11 17:10:48 +01:00
wl3501_cs.c
wl3501.h