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401e7e88d4
When we excute the following commands, we got oops
rmmod ipmi_si
cat /proc/ioports
[ 1623.482380] Unable to handle kernel paging request at virtual address ffff00000901d478
[ 1623.482382] Mem abort info:
[ 1623.482383] ESR = 0x96000007
[ 1623.482385] Exception class = DABT (current EL), IL = 32 bits
[ 1623.482386] SET = 0, FnV = 0
[ 1623.482387] EA = 0, S1PTW = 0
[ 1623.482388] Data abort info:
[ 1623.482389] ISV = 0, ISS = 0x00000007
[ 1623.482390] CM = 0, WnR = 0
[ 1623.482393] swapper pgtable: 4k pages, 48-bit VAs, pgdp = 00000000d7d94a66
[ 1623.482395] [ffff00000901d478] pgd=000000dffbfff003, pud=000000dffbffe003, pmd=0000003f5d06e003, pte=0000000000000000
[ 1623.482399] Internal error: Oops: 96000007 [#1] SMP
[ 1623.487407] Modules linked in: ipmi_si(E) 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 dm_mirror dm_region_hash dm_log iw_cm dm_mod aes_ce_blk crypto_simd cryptd aes_ce_cipher ses ghash_ce sha2_ce enclosure sha256_arm64 sg sha1_ce hisi_sas_v2_hw hibmc_drm sbsa_gwdt hisi_sas_main ip_tables mlx5_ib ib_uverbs marvell ib_core mlx5_core ixgbe mdio hns_dsaf ipmi_devintf hns_enet_drv ipmi_msghandler hns_mdio [last unloaded: ipmi_si]
[ 1623.532410] CPU: 30 PID: 11438 Comm: cat Kdump: loaded Tainted: G E 5.0.0-rc3+ #168
[ 1623.541498] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.37 11/21/2017
[ 1623.548822] pstate: a0000005 (NzCv daif -PAN -UAO)
[ 1623.553684] pc : string+0x28/0x98
[ 1623.557040] lr : vsnprintf+0x368/0x5e8
[ 1623.560837] sp : ffff000013213a80
[ 1623.564191] x29: ffff000013213a80 x28: ffff00001138abb5
[ 1623.569577] x27: ffff000013213c18 x26: ffff805f67d06049
[ 1623.574963] x25: 0000000000000000 x24: ffff00001138abb5
[ 1623.580349] x23: 0000000000000fb7 x22: ffff0000117ed000
[ 1623.585734] x21: ffff000011188fd8 x20: ffff805f67d07000
[ 1623.591119] x19: ffff805f67d06061 x18: ffffffffffffffff
[ 1623.596505] x17: 0000000000000200 x16: 0000000000000000
[ 1623.601890] x15: ffff0000117ed748 x14: ffff805f67d07000
[ 1623.607276] x13: ffff805f67d0605e x12: 0000000000000000
[ 1623.612661] x11: 0000000000000000 x10: 0000000000000000
[ 1623.618046] x9 : 0000000000000000 x8 : 000000000000000f
[ 1623.623432] x7 : ffff805f67d06061 x6 : fffffffffffffffe
[ 1623.628817] x5 : 0000000000000012 x4 : ffff00000901d478
[ 1623.634203] x3 : ffff0a00ffffff04 x2 : ffff805f67d07000
[ 1623.639588] x1 : ffff805f67d07000 x0 : ffffffffffffffff
[ 1623.644974] Process cat (pid: 11438, stack limit = 0x000000008d4cbc10)
[ 1623.651592] Call trace:
[ 1623.654068] string+0x28/0x98
[ 1623.657071] vsnprintf+0x368/0x5e8
[ 1623.660517] seq_vprintf+0x70/0x98
[ 1623.668009] seq_printf+0x7c/0xa0
[ 1623.675530] r_show+0xc8/0xf8
[ 1623.682558] seq_read+0x330/0x440
[ 1623.689877] proc_reg_read+0x78/0xd0
[ 1623.697346] __vfs_read+0x60/0x1a0
[ 1623.704564] vfs_read+0x94/0x150
[ 1623.711339] ksys_read+0x6c/0xd8
[ 1623.717939] __arm64_sys_read+0x24/0x30
[ 1623.725077] el0_svc_common+0x120/0x148
[ 1623.732035] el0_svc_handler+0x30/0x40
[ 1623.738757] el0_svc+0x8/0xc
[ 1623.744520] Code: d1000406 aa0103e2 54000149 b4000080 (39400085)
[ 1623.753441] ---[ end trace f91b6a4937de9835 ]---
[ 1623.760871] Kernel panic - not syncing: Fatal exception
[ 1623.768935] SMP: stopping secondary CPUs
[ 1623.775718] Kernel Offset: disabled
[ 1623.781998] CPU features: 0x002,21006008
[ 1623.788777] Memory Limit: none
[ 1623.798329] Starting crashdump kernel...
[ 1623.805202] Bye!
If io_setup is called successful in try_smi_init() but try_smi_init()
goes out_err before calling ipmi_register_smi(), so ipmi_unregister_smi()
will not be called while removing module. It leads to the resource that
allocated in io_setup() can not be freed, but the name(DEVICE_NAME) of
resource is freed while removing the module. It causes use-after-free
when cat /proc/ioports.
Fix this by calling io_cleanup() while try_smi_init() goes to out_err.
and don't call io_cleanup() until io_setup() returns successful to avoid
warning prints.
Fixes: 93c303d204 ("ipmi_si: Clean up shutdown a bit")
Cc: stable@vger.kernel.org
Reported-by: NuoHan Qiao <qiaonuohan@huawei.com>
Suggested-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <linux/io.h>
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#include "ipmi_si.h"
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static unsigned char port_inb(const struct si_sm_io *io, unsigned int offset)
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{
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unsigned int addr = io->addr_data;
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return inb(addr + (offset * io->regspacing));
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}
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static void port_outb(const struct si_sm_io *io, unsigned int offset,
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unsigned char b)
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{
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unsigned int addr = io->addr_data;
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outb(b, addr + (offset * io->regspacing));
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}
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static unsigned char port_inw(const struct si_sm_io *io, unsigned int offset)
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{
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unsigned int addr = io->addr_data;
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return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
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}
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static void port_outw(const struct si_sm_io *io, unsigned int offset,
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unsigned char b)
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{
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unsigned int addr = io->addr_data;
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outw(b << io->regshift, addr + (offset * io->regspacing));
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}
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static unsigned char port_inl(const struct si_sm_io *io, unsigned int offset)
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{
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unsigned int addr = io->addr_data;
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return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
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}
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static void port_outl(const struct si_sm_io *io, unsigned int offset,
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unsigned char b)
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{
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unsigned int addr = io->addr_data;
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outl(b << io->regshift, addr+(offset * io->regspacing));
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}
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static void port_cleanup(struct si_sm_io *io)
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{
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unsigned int addr = io->addr_data;
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int idx;
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if (addr) {
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for (idx = 0; idx < io->io_size; idx++)
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release_region(addr + idx * io->regspacing,
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io->regsize);
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}
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}
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int ipmi_si_port_setup(struct si_sm_io *io)
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{
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unsigned int addr = io->addr_data;
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int idx;
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if (!addr)
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return -ENODEV;
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/*
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* Figure out the actual inb/inw/inl/etc routine to use based
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* upon the register size.
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*/
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switch (io->regsize) {
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case 1:
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io->inputb = port_inb;
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io->outputb = port_outb;
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break;
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case 2:
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io->inputb = port_inw;
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io->outputb = port_outw;
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break;
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case 4:
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io->inputb = port_inl;
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io->outputb = port_outl;
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break;
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default:
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dev_warn(io->dev, "Invalid register size: %d\n",
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io->regsize);
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return -EINVAL;
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}
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/*
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* Some BIOSes reserve disjoint I/O regions in their ACPI
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* tables. This causes problems when trying to register the
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* entire I/O region. Therefore we must register each I/O
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* port separately.
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*/
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for (idx = 0; idx < io->io_size; idx++) {
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if (request_region(addr + idx * io->regspacing,
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io->regsize, DEVICE_NAME) == NULL) {
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/* Undo allocations */
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while (idx--)
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release_region(addr + idx * io->regspacing,
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io->regsize);
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return -EIO;
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}
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}
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io->io_cleanup = port_cleanup;
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return 0;
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}
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