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4deb550bc3
linux/drivers/atm
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Tong Zhang 4deb550bc3 atm: eni: dont release is never initialized 
label err_eni_release is reachable when eni_start() fail.
In eni_start() it calls dev->phy->start() in the last step, if start()
fail we don't need to call phy->stop(), if start() is never called, we
neither need to call phy->stop(), otherwise null-ptr-deref will happen.

In order to fix this issue, don't call phy->stop() in label err_eni_release

[    4.875714] ==================================================================
[    4.876091] BUG: KASAN: null-ptr-deref in suni_stop+0x47/0x100 [suni]
[    4.876433] Read of size 8 at addr 0000000000000030 by task modprobe/95
[    4.876778]
[    4.876862] CPU: 0 PID: 95 Comm: modprobe Not tainted 5.11.0-rc7-00090-gdcc0b49040c7 #2
[    4.877290] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-48-gd94
[    4.877876] Call Trace:
[    4.878009]  dump_stack+0x7d/0xa3
[    4.878191]  kasan_report.cold+0x10c/0x10e
[    4.878410]  ? __slab_free+0x2f0/0x340
[    4.878612]  ? suni_stop+0x47/0x100 [suni]
[    4.878832]  suni_stop+0x47/0x100 [suni]
[    4.879043]  eni_do_release+0x3b/0x70 [eni]
[    4.879269]  eni_init_one.cold+0x1152/0x1747 [eni]
[    4.879528]  ? _raw_spin_lock_irqsave+0x7b/0xd0
[    4.879768]  ? eni_ioctl+0x270/0x270 [eni]
[    4.879990]  ? __mutex_lock_slowpath+0x10/0x10
[    4.880226]  ? eni_ioctl+0x270/0x270 [eni]
[    4.880448]  local_pci_probe+0x6f/0xb0
[    4.880650]  pci_device_probe+0x171/0x240
[    4.880864]  ? pci_device_remove+0xe0/0xe0
[    4.881086]  ? kernfs_create_link+0xb6/0x110
[    4.881315]  ? sysfs_do_create_link_sd.isra.0+0x76/0xe0
[    4.881594]  really_probe+0x161/0x420
[    4.881791]  driver_probe_device+0x6d/0xd0
[    4.882010]  device_driver_attach+0x82/0x90
[    4.882233]  ? device_driver_attach+0x90/0x90
[    4.882465]  __driver_attach+0x60/0x100
[    4.882671]  ? device_driver_attach+0x90/0x90
[    4.882903]  bus_for_each_dev+0xe1/0x140
[    4.883114]  ? subsys_dev_iter_exit+0x10/0x10
[    4.883346]  ? klist_node_init+0x61/0x80
[    4.883557]  bus_add_driver+0x254/0x2a0
[    4.883764]  driver_register+0xd3/0x150
[    4.883971]  ? 0xffffffffc0038000
[    4.884149]  do_one_initcall+0x84/0x250
[    4.884355]  ? trace_event_raw_event_initcall_finish+0x150/0x150
[    4.884674]  ? unpoison_range+0xf/0x30
[    4.884875]  ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[    4.885150]  ? unpoison_range+0xf/0x30
[    4.885352]  ? unpoison_range+0xf/0x30
[    4.885557]  do_init_module+0xf8/0x350
[    4.885760]  load_module+0x3fe6/0x4340
[    4.885960]  ? vm_unmap_ram+0x1d0/0x1d0
[    4.886166]  ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[    4.886441]  ? module_frob_arch_sections+0x20/0x20
[    4.886697]  ? __do_sys_finit_module+0x108/0x170
[    4.886941]  __do_sys_finit_module+0x108/0x170
[    4.887178]  ? __ia32_sys_init_module+0x40/0x40
[    4.887419]  ? file_open_root+0x200/0x200
[    4.887634]  ? do_sys_open+0x85/0xe0
[    4.887826]  ? filp_open+0x50/0x50
[    4.888009]  ? fpregs_assert_state_consistent+0x4d/0x60
[    4.888287]  ? exit_to_user_mode_prepare+0x2f/0x130
[    4.888547]  do_syscall_64+0x33/0x40
[    4.888739]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    4.889010] RIP: 0033:0x7ff62fcf1cf7
[    4.889202] Code: 48 89 57 30 48 8b 04 24 48 89 47 38 e9 1d a0 02 00 48 89 f8 48 89 f71
[    4.890172] RSP: 002b:00007ffe6644ade8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    4.890570] RAX: ffffffffffffffda RBX: 0000000000f2ca70 RCX: 00007ff62fcf1cf7
[    4.890944] RDX: 0000000000000000 RSI: 0000000000f2b9e0 RDI: 0000000000000003
[    4.891318] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
[    4.891691] R10: 00007ff62fd55300 R11: 0000000000000246 R12: 0000000000f2b9e0
[    4.892064] R13: 0000000000000000 R14: 0000000000f2bdd0 R15: 0000000000000001
[    4.892439] ==================================================================

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-01 13:17:36 -08:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
adummy.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
ambassador.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
ambassador.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
atmtcp.c atm: atmtcp: Constify atmtcp_v_dev_ops 2020-09-28 16:03:30 -07:00
eni.c atm: eni: dont release is never initialized 2021-03-01 13:17:36 -08:00
eni.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
firestream.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-03 18:50:48 -07:00
firestream.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
fore200e.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
fore200e.h fore200e: devirtualize dma alloc calls 2018-10-10 22:38:50 -07:00
he.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
he.h atm: remove deprecated use of pci api 2015-01-18 00:28:41 -05:00
horizon.c net/atm: remove the atmdev_ops {get, set}sockopt methods 2020-07-19 18:16:40 -07:00
horizon.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
idt77105.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
idt77105.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
idt77252_tables.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
idt77252.c atm: idt77252: fix build broken on amd64 2021-02-15 12:36:27 -08:00
idt77252.h atm: idt77252: fix build broken on amd64 2021-02-15 12:36:27 -08:00
iphase.c net/atm: remove the atmdev_ops {get, set}sockopt methods 2020-07-19 18:16:40 -07:00
iphase.h scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
Kconfig docs: networking: move ATM drivers to the hw driver section 2020-06-26 16:08:45 -07:00
lanai.c atm: lanai: Remove in_interrupt() usage 2020-11-18 16:43:59 -08:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
midway.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nicstar.c Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-19 19:08:46 -08:00
nicstar.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nicstarmac.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nicstarmac.copyright
solos-attrlist.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
solos-pci.c net/atm: remove the atmdev_ops {get, set}sockopt methods 2020-07-19 18:16:40 -07:00
suni.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
suni.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tonga.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
uPD98401.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
uPD98402.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
uPD98402.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zatm.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
zatm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zeprom.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00