Corey Minyard 888e989a75 ipmi: Fix I2C client removal in the SSIF driver ... commit 0745dde628 upstream. The SSIF driver was removing any client that came in through the platform interface, but it should only remove clients that it added. On a failure in the probe function, this could result in the following oops when the driver is removed and the client gets unregistered twice: CPU: 107 PID: 30266 Comm: rmmod Not tainted 4.18.0+ #80 Hardware name: Cavium Inc. Saber/Saber, BIOS Cavium reference firmware version 7.0 08/04/2018 pstate: 60400009 (nZCv daif +PAN -UAO) pc : kernfs_find_ns+0x28/0x120 lr : kernfs_find_and_get_ns+0x40/0x60 sp : ffff00002310fb50 x29: ffff00002310fb50 x28: ffff800a8240f800 x27: 0000000000000000 x26: 0000000000000000 x25: 0000000056000000 x24: ffff000009073000 x23: ffff000008998b38 x22: 0000000000000000 x21: ffff800ed86de820 x20: 0000000000000000 x19: ffff00000913a1d8 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 5300737265766972 x13: 643d4d4554535953 x12: 0000000000000030 x11: 0000000000000030 x10: 0101010101010101 x9 : ffff800ea06cc3f9 x8 : 0000000000000000 x7 : 0000000000000141 x6 : ffff000009073000 x5 : ffff800adb706b00 x4 : 0000000000000000 x3 : 00000000ffffffff x2 : 0000000000000000 x1 : ffff000008998b38 x0 : ffff000008356760 Process rmmod (pid: 30266, stack limit = 0x00000000e218418d) Call trace: kernfs_find_ns+0x28/0x120 kernfs_find_and_get_ns+0x40/0x60 sysfs_unmerge_group+0x2c/0x6c dpm_sysfs_remove+0x34/0x70 device_del+0x58/0x30c device_unregister+0x30/0x7c i2c_unregister_device+0x84/0x90 [i2c_core] ssif_platform_remove+0x38/0x98 [ipmi_ssif] platform_drv_remove+0x2c/0x6c device_release_driver_internal+0x168/0x1f8 driver_detach+0x50/0xbc bus_remove_driver+0x74/0xe8 driver_unregister+0x34/0x5c platform_driver_unregister+0x20/0x2c cleanup_ipmi_ssif+0x50/0xd82c [ipmi_ssif] __arm64_sys_delete_module+0x1b4/0x220 el0_svc_handler+0x104/0x160 el0_svc+0x8/0xc Code: aa1e03e0 aa0203f6 aa0103f7 d503201f (7940e280) ---[ end trace 09f0e34cce8e2d8c ]--- Kernel panic - not syncing: Fatal exception SMP: stopping secondary CPUs Kernel Offset: disabled CPU features: 0x23800c38 So track the clients that the SSIF driver adds and only remove those. Reported-by: George Cherian <george.cherian@cavium.com> Signed-off-by: Corey Minyard <cminyard@mvista.com> Tested-by: George Cherian <george.cherian@cavium.com> Cc: <stable@vger.kernel.org> # 4.14.x Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-26 08:38:06 +02:00
..
Kconfig	ipmi: Create a platform device for a DMI-specified IPMI interface	2017-06-19 12:49:36 -05:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
bt-bmc.c	ipmi: bt-bmc: Add ast2500 compatible string	2017-04-07 12:25:38 -05:00
ipmi_bt_sm.c	ipmi:bt: Set the timeout before doing a capabilities check	2018-07-03 11:24:49 +02:00
ipmi_devintf.c	ipmi: get rid of field-by-field __get_user()	2017-06-26 17:02:54 -04:00
ipmi_dmi.c	ipmi: use dynamic memory for DMI driver override	2018-02-16 20:23:06 +01:00
ipmi_dmi.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ipmi_kcs_sm.c	ipmi: Make some data const that was only read	2015-09-03 15:02:27 -05:00
ipmi_msghandler.c	ipmi: fix unsigned long underflow	2017-11-24 08:37:04 +01:00
ipmi_powernv.c	ipmi/powernv: Fix error return code in ipmi_powernv_probe()	2018-04-26 11:02:08 +02:00
ipmi_poweroff.c	char: Convert use of typedef ctl_table to struct ctl_table	2013-06-17 16:43:08 -07:00
ipmi_si_intf.c	Revert "ipmi_si: fix memory leak on new_smi"	2017-12-29 17:53:49 +01:00
ipmi_si_sm.h	ipmi: Make some data const that was only read	2015-09-03 15:02:27 -05:00
ipmi_smic_sm.c	ipmi: Make some data const that was only read	2015-09-03 15:02:27 -05:00
ipmi_ssif.c	ipmi: Fix I2C client removal in the SSIF driver	2018-09-26 08:38:06 +02:00
ipmi_watchdog.c	Some small fixes for IPMI, and one medium sized changed.	2017-07-10 10:59:29 -07:00