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a2bd45834e
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Tong Zhang a2bd45834e atm: lanai: dont run lanai_dev_close if not open 
lanai_dev_open() can fail. When it fail, lanai->base is unmapped and the
pci device is disabled. The caller, lanai_init_one(), then tries to run
atm_dev_deregister(). This will subsequently call lanai_dev_close() and
use the already released MMIO area.

To fix this issue, set the lanai->base to NULL if open fail,
and test the flag in lanai_dev_close().

[    8.324153] lanai: lanai_start() failed, err=19
[    8.324819] lanai(itf 0): shutting down interface
[    8.325211] BUG: unable to handle page fault for address: ffffc90000180024
[    8.325781] #PF: supervisor write access in kernel mode
[    8.326215] #PF: error_code(0x0002) - not-present page
[    8.326641] PGD 100000067 P4D 100000067 PUD 100139067 PMD 10013a067 PTE 0
[    8.327206] Oops: 0002 [#1] SMP KASAN NOPTI
[    8.327557] CPU: 0 PID: 95 Comm: modprobe Not tainted 5.11.0-rc7-00090-gdcc0b49040c7 #12
[    8.328229] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-48-gd9c812dda519-4
[    8.329145] RIP: 0010:lanai_dev_close+0x4f/0xe5 [lanai]
[    8.329587] Code: 00 48 c7 c7 00 d3 01 c0 e8 49 4e 0a c2 48 8d bd 08 02 00 00 e8 6e 52 14 c1 48 80
[    8.330917] RSP: 0018:ffff8881029ef680 EFLAGS: 00010246
[    8.331196] RAX: 000000000003fffe RBX: ffff888102fb4800 RCX: ffffffffc001a98a
[    8.331572] RDX: ffffc90000180000 RSI: 0000000000000246 RDI: ffff888102fb4000
[    8.331948] RBP: ffff888102fb4000 R08: ffffffff8115da8a R09: ffffed102053deaa
[    8.332326] R10: 0000000000000003 R11: ffffed102053dea9 R12: ffff888102fb48a4
[    8.332701] R13: ffffffffc00123c0 R14: ffff888102fb4b90 R15: ffff888102fb4b88
[    8.333077] FS:  00007f08eb9056a0(0000) GS:ffff88815b400000(0000) knlGS:0000000000000000
[    8.333502] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.333806] CR2: ffffc90000180024 CR3: 0000000102a28000 CR4: 00000000000006f0
[    8.334182] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    8.334557] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    8.334932] Call Trace:
[    8.335066]  atm_dev_deregister+0x161/0x1a0 [atm]
[    8.335324]  lanai_init_one.cold+0x20c/0x96d [lanai]
[    8.335594]  ? lanai_send+0x2a0/0x2a0 [lanai]
[    8.335831]  local_pci_probe+0x6f/0xb0
[    8.336039]  pci_device_probe+0x171/0x240
[    8.336255]  ? pci_device_remove+0xe0/0xe0
[    8.336475]  ? kernfs_create_link+0xb6/0x110
[    8.336704]  ? sysfs_do_create_link_sd.isra.0+0x76/0xe0
[    8.336983]  really_probe+0x161/0x420
[    8.337181]  driver_probe_device+0x6d/0xd0
[    8.337401]  device_driver_attach+0x82/0x90
[    8.337626]  ? device_driver_attach+0x90/0x90
[    8.337859]  __driver_attach+0x60/0x100
[    8.338065]  ? device_driver_attach+0x90/0x90
[    8.338298]  bus_for_each_dev+0xe1/0x140
[    8.338511]  ? subsys_dev_iter_exit+0x10/0x10
[    8.338745]  ? klist_node_init+0x61/0x80
[    8.338956]  bus_add_driver+0x254/0x2a0
[    8.339164]  driver_register+0xd3/0x150
[    8.339370]  ? 0xffffffffc0028000
[    8.339550]  do_one_initcall+0x84/0x250
[    8.339755]  ? trace_event_raw_event_initcall_finish+0x150/0x150
[    8.340076]  ? free_vmap_area_noflush+0x1a5/0x5c0
[    8.340329]  ? unpoison_range+0xf/0x30
[    8.340532]  ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[    8.340806]  ? unpoison_range+0xf/0x30
[    8.341014]  ? unpoison_range+0xf/0x30
[    8.341217]  do_init_module+0xf8/0x350
[    8.341419]  load_module+0x3fe6/0x4340
[    8.341621]  ? vm_unmap_ram+0x1d0/0x1d0
[    8.341826]  ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[    8.342101]  ? module_frob_arch_sections+0x20/0x20
[    8.342358]  ? __do_sys_finit_module+0x108/0x170
[    8.342604]  __do_sys_finit_module+0x108/0x170
[    8.342841]  ? __ia32_sys_init_module+0x40/0x40
[    8.343083]  ? file_open_root+0x200/0x200
[    8.343298]  ? do_sys_open+0x85/0xe0
[    8.343491]  ? filp_open+0x50/0x50
[    8.343675]  ? exit_to_user_mode_prepare+0xfc/0x130
[    8.343935]  do_syscall_64+0x33/0x40
[    8.344132]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    8.344401] RIP: 0033:0x7f08eb887cf7
[    8.344594] Code: 48 89 57 30 48 8b 04 24 48 89 47 38 e9 1d a0 02 00 48 89 f8 48 89 f7 48 89 d6 41
[    8.345565] RSP: 002b:00007ffcd5c98ad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    8.345962] RAX: ffffffffffffffda RBX: 00000000008fea70 RCX: 00007f08eb887cf7
[    8.346336] RDX: 0000000000000000 RSI: 00000000008fd9e0 RDI: 0000000000000003
[    8.346711] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
[    8.347085] R10: 00007f08eb8eb300 R11: 0000000000000246 R12: 00000000008fd9e0
[    8.347460] R13: 0000000000000000 R14: 00000000008fddd0 R15: 0000000000000001
[    8.347836] Modules linked in: lanai(+) atm
[    8.348065] CR2: ffffc90000180024
[    8.348244] ---[ end trace 7fdc1c668f2003e5 ]---
[    8.348490] RIP: 0010:lanai_dev_close+0x4f/0xe5 [lanai]
[    8.348772] Code: 00 48 c7 c7 00 d3 01 c0 e8 49 4e 0a c2 48 8d bd 08 02 00 00 e8 6e 52 14 c1 48 80
[    8.349745] RSP: 0018:ffff8881029ef680 EFLAGS: 00010246
[    8.350022] RAX: 000000000003fffe RBX: ffff888102fb4800 RCX: ffffffffc001a98a
[    8.350397] RDX: ffffc90000180000 RSI: 0000000000000246 RDI: ffff888102fb4000
[    8.350772] RBP: ffff888102fb4000 R08: ffffffff8115da8a R09: ffffed102053deaa
[    8.351151] R10: 0000000000000003 R11: ffffed102053dea9 R12: ffff888102fb48a4
[    8.351525] R13: ffffffffc00123c0 R14: ffff888102fb4b90 R15: ffff888102fb4b88
[    8.351918] FS:  00007f08eb9056a0(0000) GS:ffff88815b400000(0000) knlGS:0000000000000000
[    8.352343] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.352647] CR2: ffffc90000180024 CR3: 0000000102a28000 CR4: 00000000000006f0
[    8.353022] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    8.353397] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    8.353958] modprobe (95) used greatest stack depth: 26216 bytes left

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-01 13:18:54 -08:00
arch Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2021-02-26 13:16:31 -08:00
block for-5.12/block-ipi-2021-02-21 2021-02-22 10:53:05 -08:00
certs certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID 2021-01-21 16:16:10 +00:00
crypto Keyrings miscellany 2021-02-23 16:09:23 -08:00
Documentation pwm: Changes for v5.12-rc1 2021-02-25 12:23:49 -08:00
drivers atm: lanai: dont run lanai_dev_close if not open 2021-03-01 13:18:54 -08:00
fs Miscellaneous ext4 cleanups and bug fixes. Pretty boring this 2021-02-25 10:06:55 -08:00
include Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2021-02-26 13:16:31 -08:00
init Kbuild updates for v5.12 2021-02-25 10:17:31 -08:00
ipc fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
kernel Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2021-02-26 13:16:31 -08:00
lib Kbuild updates for v5.12 2021-02-25 10:17:31 -08:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
mm mm/hugetlb: change hugetlb_reserve_pages() to type bool 2021-02-24 13:38:35 -08:00
net net: always use icmp{,v6}_ndo_send from ndo_start_xmit 2021-03-01 13:11:35 -08:00
samples Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
scripts Kbuild updates for v5.12 2021-02-25 10:17:31 -08:00
security Keyrings miscellany 2021-02-23 16:09:23 -08:00
sound ARM updates for 5.12-rc1: 2021-02-22 14:27:07 -08:00
tools selftests: forwarding: Fix race condition in mirror installation 2021-02-26 15:47:52 -08:00
usr Kbuild updates for v5.12 2021-02-25 10:17:31 -08:00
virt KVM/arm64 fixes for 5.11, take #2 2021-02-12 14:07:39 +00:00
.clang-format cxl for 5.12 2021-02-24 09:38:36 -08:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore clang-lto series for v5.12-rc1 2021-02-23 09:28:51 -08:00
.mailmap Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2021-02-21 17:23:56 -08:00
COPYING
CREDITS CREDITS: update email address and home address 2021-01-27 21:03:50 +02:00
Kbuild
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS wireless-drivers fixes for v5.12 2021-02-26 13:17:44 -08:00
Makefile Kbuild updates for v5.12 2021-02-25 10:17:31 -08:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.