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b2c01aab96
Syzkaller report this:
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN PTI
CPU: 0 PID: 4492 Comm: syz-executor.0 Not tainted 5.0.0-rc7+ #45
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
RIP: 0010:sysfs_remove_file_ns+0x27/0x70 fs/sysfs/file.c:468
Code: 00 00 00 41 54 55 48 89 fd 53 49 89 d4 48 89 f3 e8 ee 76 9c ff 48 8d 7d 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 2d 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 8b 6d
RSP: 0018:ffff8881e9d9fc00 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffffffff900367e0 RCX: ffffffff81a95952
RDX: 0000000000000006 RSI: ffffc90001405000 RDI: 0000000000000030
RBP: 0000000000000000 R08: fffffbfff1fa22ed R09: fffffbfff1fa22ed
R10: 0000000000000001 R11: fffffbfff1fa22ec R12: 0000000000000000
R13: ffffffffc1abdac0 R14: 1ffff1103d3b3f8b R15: 0000000000000000
FS: 00007fe409dc1700(0000) GS:ffff8881f1200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d721000 CR3: 00000001e98b6005 CR4: 00000000007606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
sysfs_remove_file include/linux/sysfs.h:519 [inline]
driver_remove_file+0x40/0x50 drivers/base/driver.c:122
pcmcia_remove_newid_file drivers/pcmcia/ds.c:163 [inline]
pcmcia_unregister_driver+0x7d/0x2b0 drivers/pcmcia/ds.c:209
ssb_modexit+0xa/0x1b [ssb]
__do_sys_delete_module kernel/module.c:1018 [inline]
__se_sys_delete_module kernel/module.c:961 [inline]
__x64_sys_delete_module+0x3dc/0x5e0 kernel/module.c:961
do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462e99
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
RSP: 002b:00007fe409dc0c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000b0
RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe409dc16bc
R13: 00000000004bccaa R14: 00000000006f6bc8 R15: 00000000ffffffff
Modules linked in: ssb(-) 3c59x nvme_core macvlan tap pata_hpt3x3 rt2x00pci null_blk tsc40 pm_notifier_error_inject notifier_error_inject mdio cdc_wdm nf_reject_ipv4 ath9k_common ath9k_hw ath pppox ppp_generic slhc ehci_platform wl12xx wlcore tps6507x_ts ioc4 nf_synproxy_core ide_gd_mod ax25 can_dev iwlwifi can_raw atm tm2_touchkey can_gw can sundance adp5588_keys rt2800mmio rt2800lib rt2x00mmio rt2x00lib eeprom_93cx6 pn533 lru_cache elants_i2c ip_set nfnetlink gameport tipc hampshire nhc_ipv6 nhc_hop nhc_udp nhc_fragment nhc_routing nhc_mobility nhc_dest 6lowpan silead brcmutil nfc mt76_usb mt76 mac80211 iptable_security iptable_raw iptable_mangle iptable_nat nf_nat_ipv4 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bpfilter ip6_vti ip_gre sit hsr veth vxcan batman_adv cfg80211 rfkill chnl_net caif nlmon vcan bridge stp llc ip6_gre ip6_tunnel tunnel6 tun joydev mousedev serio_raw ide_pci_generic piix floppy ide_core sch_fq_codel ip_tables x_tables ipv6
[last unloaded: 3c59x]
Dumping ftrace buffer:
(ftrace buffer empty)
---[ end trace 3913cbf8011e1c05 ]---
In ssb_modinit, it does not fail SSB init when ssb_host_pcmcia_init failed,
however in ssb_modexit, ssb_host_pcmcia_exit calls pcmcia_unregister_driver
unconditionally, which may tigger a NULL pointer dereference issue as above.
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 399500da18 ("ssb: pick PCMCIA host code support from b43 driver")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
134 lines
2.8 KiB
C
134 lines
2.8 KiB
C
/*
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* Broadcom 43xx PCMCIA-SSB bridge module
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*
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* Copyright (c) 2007 Michael Buesch <m@bues.ch>
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include "ssb_private.h"
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#include <linux/ssb/ssb.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/ciscode.h>
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#include <pcmcia/ds.h>
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#include <pcmcia/cisreg.h>
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static const struct pcmcia_device_id ssb_host_pcmcia_tbl[] = {
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PCMCIA_DEVICE_MANF_CARD(0x2D0, 0x448),
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PCMCIA_DEVICE_MANF_CARD(0x2D0, 0x476),
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PCMCIA_DEVICE_NULL,
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};
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MODULE_DEVICE_TABLE(pcmcia, ssb_host_pcmcia_tbl);
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static int ssb_host_pcmcia_probe(struct pcmcia_device *dev)
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{
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struct ssb_bus *ssb;
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int err = -ENOMEM;
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int res = 0;
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ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
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if (!ssb)
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goto out_error;
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err = -ENODEV;
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dev->config_flags |= CONF_ENABLE_IRQ;
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dev->resource[2]->flags |= WIN_ENABLE | WIN_DATA_WIDTH_16 |
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WIN_USE_WAIT;
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dev->resource[2]->start = 0;
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dev->resource[2]->end = SSB_CORE_SIZE;
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res = pcmcia_request_window(dev, dev->resource[2], 250);
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if (res != 0)
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goto err_kfree_ssb;
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res = pcmcia_map_mem_page(dev, dev->resource[2], 0);
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if (res != 0)
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goto err_disable;
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if (!dev->irq)
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goto err_disable;
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res = pcmcia_enable_device(dev);
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if (res != 0)
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goto err_disable;
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err = ssb_bus_pcmciabus_register(ssb, dev, dev->resource[2]->start);
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if (err)
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goto err_disable;
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dev->priv = ssb;
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return 0;
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err_disable:
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pcmcia_disable_device(dev);
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err_kfree_ssb:
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kfree(ssb);
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out_error:
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dev_err(&dev->dev, "Initialization failed (%d, %d)\n", res, err);
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return err;
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}
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static void ssb_host_pcmcia_remove(struct pcmcia_device *dev)
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{
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struct ssb_bus *ssb = dev->priv;
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ssb_bus_unregister(ssb);
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pcmcia_disable_device(dev);
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kfree(ssb);
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dev->priv = NULL;
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}
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#ifdef CONFIG_PM
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static int ssb_host_pcmcia_suspend(struct pcmcia_device *dev)
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{
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struct ssb_bus *ssb = dev->priv;
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return ssb_bus_suspend(ssb);
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}
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static int ssb_host_pcmcia_resume(struct pcmcia_device *dev)
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{
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struct ssb_bus *ssb = dev->priv;
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return ssb_bus_resume(ssb);
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}
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#else /* CONFIG_PM */
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# define ssb_host_pcmcia_suspend NULL
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# define ssb_host_pcmcia_resume NULL
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#endif /* CONFIG_PM */
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static struct pcmcia_driver ssb_host_pcmcia_driver = {
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.owner = THIS_MODULE,
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.name = "ssb-pcmcia",
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.id_table = ssb_host_pcmcia_tbl,
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.probe = ssb_host_pcmcia_probe,
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.remove = ssb_host_pcmcia_remove,
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.suspend = ssb_host_pcmcia_suspend,
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.resume = ssb_host_pcmcia_resume,
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};
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static int pcmcia_init_failed;
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/*
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* These are not module init/exit functions!
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* The module_pcmcia_driver() helper cannot be used here.
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*/
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int ssb_host_pcmcia_init(void)
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{
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pcmcia_init_failed = pcmcia_register_driver(&ssb_host_pcmcia_driver);
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return pcmcia_init_failed;
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}
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void ssb_host_pcmcia_exit(void)
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{
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if (!pcmcia_init_failed)
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pcmcia_unregister_driver(&ssb_host_pcmcia_driver);
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}
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