1
0
Fork 0
alistair23-linux/drivers/char/ipmi
Yang Yingliang 77f8269606 ipmi: fix use-after-free of user->release_barrier.rda
When we do the following test, we got oops in ipmi_msghandler driver
while((1))
do
	service ipmievd restart & service ipmievd restart
done

---------------------------------------------------------------
[  294.230186] Unable to handle kernel paging request at virtual address 0000803fea6ea008
[  294.230188] Mem abort info:
[  294.230190]   ESR = 0x96000004
[  294.230191]   Exception class = DABT (current EL), IL = 32 bits
[  294.230193]   SET = 0, FnV = 0
[  294.230194]   EA = 0, S1PTW = 0
[  294.230195] Data abort info:
[  294.230196]   ISV = 0, ISS = 0x00000004
[  294.230197]   CM = 0, WnR = 0
[  294.230199] user pgtable: 4k pages, 48-bit VAs, pgdp = 00000000a1c1b75a
[  294.230201] [0000803fea6ea008] pgd=0000000000000000
[  294.230204] Internal error: Oops: 96000004 [#1] SMP
[  294.235211] Modules linked in: nls_utf8 isofs rpcrdma ib_iser ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_umad rdma_cm ib_cm iw_cm dm_mirror dm_region_hash dm_log dm_mod aes_ce_blk crypto_simd cryptd aes_ce_cipher ghash_ce sha2_ce ses sha256_arm64 sha1_ce hibmc_drm hisi_sas_v2_hw enclosure sg hisi_sas_main sbsa_gwdt ip_tables mlx5_ib ib_uverbs marvell ib_core mlx5_core ixgbe ipmi_si mdio hns_dsaf ipmi_devintf ipmi_msghandler hns_enet_drv hns_mdio
[  294.277745] CPU: 3 PID: 0 Comm: swapper/3 Kdump: loaded Not tainted 5.0.0-rc2+ #113
[  294.285511] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.37 11/21/2017
[  294.292835] pstate: 80000005 (Nzcv daif -PAN -UAO)
[  294.297695] pc : __srcu_read_lock+0x38/0x58
[  294.301940] lr : acquire_ipmi_user+0x2c/0x70 [ipmi_msghandler]
[  294.307853] sp : ffff00001001bc80
[  294.311208] x29: ffff00001001bc80 x28: ffff0000117e5000
[  294.316594] x27: 0000000000000000 x26: dead000000000100
[  294.321980] x25: dead000000000200 x24: ffff803f6bd06800
[  294.327366] x23: 0000000000000000 x22: 0000000000000000
[  294.332752] x21: ffff00001001bd04 x20: ffff80df33d19018
[  294.338137] x19: ffff80df33d19018 x18: 0000000000000000
[  294.343523] x17: 0000000000000000 x16: 0000000000000000
[  294.348908] x15: 0000000000000000 x14: 0000000000000002
[  294.354293] x13: 0000000000000000 x12: 0000000000000000
[  294.359679] x11: 0000000000000000 x10: 0000000000100000
[  294.365065] x9 : 0000000000000000 x8 : 0000000000000004
[  294.370451] x7 : 0000000000000000 x6 : ffff80df34558678
[  294.375836] x5 : 000000000000000c x4 : 0000000000000000
[  294.381221] x3 : 0000000000000001 x2 : 0000803fea6ea000
[  294.386607] x1 : 0000803fea6ea008 x0 : 0000000000000001
[  294.391994] Process swapper/3 (pid: 0, stack limit = 0x0000000083087293)
[  294.398791] Call trace:
[  294.401266]  __srcu_read_lock+0x38/0x58
[  294.405154]  acquire_ipmi_user+0x2c/0x70 [ipmi_msghandler]
[  294.410716]  deliver_response+0x80/0xf8 [ipmi_msghandler]
[  294.416189]  deliver_local_response+0x28/0x68 [ipmi_msghandler]
[  294.422193]  handle_one_recv_msg+0x158/0xcf8 [ipmi_msghandler]
[  294.432050]  handle_new_recv_msgs+0xc0/0x210 [ipmi_msghandler]
[  294.441984]  smi_recv_tasklet+0x8c/0x158 [ipmi_msghandler]
[  294.451618]  tasklet_action_common.isra.5+0x88/0x138
[  294.460661]  tasklet_action+0x2c/0x38
[  294.468191]  __do_softirq+0x120/0x2f8
[  294.475561]  irq_exit+0x134/0x140
[  294.482445]  __handle_domain_irq+0x6c/0xc0
[  294.489954]  gic_handle_irq+0xb8/0x178
[  294.497037]  el1_irq+0xb0/0x140
[  294.503381]  arch_cpu_idle+0x34/0x1a8
[  294.510096]  do_idle+0x1d4/0x290
[  294.516322]  cpu_startup_entry+0x28/0x30
[  294.523230]  secondary_start_kernel+0x184/0x1d0
[  294.530657] Code: d538d082 d2800023 8b010c81 8b020021 (c85f7c25)
[  294.539746] ---[ end trace 8a7a880dee570b29 ]---
[  294.547341] Kernel panic - not syncing: Fatal exception in interrupt
[  294.556837] SMP: stopping secondary CPUs
[  294.563996] Kernel Offset: disabled
[  294.570515] CPU features: 0x002,21006008
[  294.577638] Memory Limit: none
[  294.587178] Starting crashdump kernel...
[  294.594314] Bye!

Because the user->release_barrier.rda is freed in ipmi_destroy_user(), but
the refcount is not zero, when acquire_ipmi_user() uses user->release_barrier.rda
in __srcu_read_lock(), it causes oops.
Fix this by calling cleanup_srcu_struct() when the refcount is zero.

Fixes: e86ee2d44b ("ipmi: Rework locking and shutdown for hot remove")
Cc: stable@vger.kernel.org # 4.18
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

Signed-off-by: Corey Minyard <cminyard@mvista.com>
2019-01-23 10:44:23 -06:00
..
Kconfig ipmi: Remove the proc interface 2018-05-09 12:21:46 -05:00
Makefile ipmi: add an NPCM7xx KCS BMC driver 2018-04-18 10:23:12 -05:00
bt-bmc.c ipmi: Add or fix SPDX-License-Identifier in all files 2018-02-27 07:42:51 -06:00
ipmi_bt_sm.c ipmi: Convert pr_xxx() to dev_xxx() in the BT code 2018-09-18 16:15:33 -05:00
ipmi_devintf.c ipmi: Convert printk(KERN_<level> to pr_<level>( 2018-09-18 16:15:33 -05:00
ipmi_dmi.c ipmi: Remove platform driver overrides and use the id_table 2018-09-18 16:15:33 -05:00
ipmi_dmi.h ipmi: Add or fix SPDX-License-Identifier in all files 2018-02-27 07:42:51 -06:00
ipmi_kcs_sm.c ipmi: Convert printk(KERN_<level> to pr_<level>( 2018-09-18 16:15:33 -05:00
ipmi_msghandler.c ipmi: fix use-after-free of user->release_barrier.rda 2019-01-23 10:44:23 -06:00
ipmi_powernv.c ipmi:powernv: Convert ipmi_smi_t to struct ipmi_smi 2018-09-18 16:15:33 -05:00
ipmi_poweroff.c ipmi: Use more common logging styles 2018-09-18 16:15:33 -05:00
ipmi_si.h ipmi: Add or fix SPDX-License-Identifier in all files 2018-02-27 07:42:51 -06:00
ipmi_si_hardcode.c ipmi: Use more common logging styles 2018-09-18 16:15:33 -05:00
ipmi_si_hotmod.c ipmi: Use more common logging styles 2018-09-18 16:15:33 -05:00
ipmi_si_intf.c drivers/ipmi: Replace synchronize_sched() with synchronize_rcu() 2018-11-27 09:21:36 -08:00
ipmi_si_mem_io.c ipmi_si: fix potential integer overflow on large shift 2018-09-18 16:15:33 -05:00
ipmi_si_parisc.c ipmi: Add or fix SPDX-License-Identifier in all files 2018-02-27 07:42:51 -06:00
ipmi_si_pci.c ipmi_si_pci: fix NULL device in ipmi_si error message 2018-09-18 16:15:33 -05:00
ipmi_si_platform.c ipmi: Remove platform driver overrides and use the id_table 2018-09-18 16:15:33 -05:00
ipmi_si_port_io.c ipmi: Add or fix SPDX-License-Identifier in all files 2018-02-27 07:42:51 -06:00
ipmi_si_sm.h ipmi: Add or fix SPDX-License-Identifier in all files 2018-02-27 07:42:51 -06:00
ipmi_smic_sm.c ipmi: Convert printk(KERN_<level> to pr_<level>( 2018-09-18 16:15:33 -05:00
ipmi_ssif.c ipmi:ssif: Fix handling of multi-part return messages 2019-01-23 10:44:23 -06:00
ipmi_watchdog.c ipmi: Use more common logging styles 2018-09-18 16:15:33 -05:00
kcs_bmc.c ipmi: kcs_bmc: don't change device name 2018-08-30 14:55:18 -05:00
kcs_bmc.h ipmi: kcs_bmc: coding-style fixes and use new poll type 2018-02-26 09:49:21 -06:00
kcs_bmc_aspeed.c ipmi: kcs_bmc: coding-style fixes and use new poll type 2018-02-26 09:49:21 -06:00
kcs_bmc_npcm7xx.c ipmi: NPCM7xx KCS BMC: enable interrupt to the host 2018-05-23 08:29:23 -05:00