806ebc1465: BUG: tried to access memory at 0x7ff6afd3 while not in USER_DS
FYI, we noticed the following commit:
https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/uaccess
commit 806ebc146567cb0030460ebf34ebecfb7c67eb76 ("[DEBUG] force
CONFIG_DEBUG_UACCESS")
on test machine: vm-lkp-wsx03-openwrt-i386: 1 threads qemu-system-i386
-enable-kvm with 192M memory
caused below changes:
++++
|| 899f263944 | 806ebc1465 |
++++
| boot_successes | 6 | 0 |
| boot_failures | 4 | 12 |
| IP-Config:Auto-configuration_of_network_failed | 4 ||
| BUG:tried_to_access_memory_at#while_not_in_USER_DS | 0 | 12 |
| kernel_BUG_at_arch/x86/mm/extable.c| 0 | 12 |
| invalid_opcode:#[##]SMP| 0 | 12 |
| EIP_is_at_bad_uaccess_kernel_ds| 0 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 12 |
| backtrace:do_vfs_ioctl | 0 | 6 |
| backtrace:SyS_ioctl| 0 | 6 |
| backtrace:do_execve| 0 | 2 |
| backtrace:SyS_execve | 0 | 2 |
++++
[ 10.893589] Write protecting the kernel read-only data: 3932k
procd: Console is alive
procd: - watchdog -
[ 10.922394] BUG: tried to access memory at 0x7ff6afd3 while not in USER_DS
[ 10.922394] BUG: tried to access memory at 0x7ff6afd3 while not in USER_DS
[ 10.923957] [ cut here ]
[ 10.923957] [ cut here ]
[ 10.924977] kernel BUG at arch/x86/mm/extable.c:189!
[ 10.924977] kernel BUG at arch/x86/mm/extable.c:189!
[ 10.926382] invalid opcode: [#1] SMP
[ 10.926382] invalid opcode: [#1] SMP
[ 10.927270] CPU: 0 PID: 1 Comm: init Not tainted 4.7.0-rc2-00014-g806ebc1
#403
[ 10.927270] CPU: 0 PID: 1 Comm: init Not tainted 4.7.0-rc2-00014-g806ebc1
#403
[ 10.928893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Debian-1.8.2-1 04/01/2014
[ 10.928893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Debian-1.8.2-1 04/01/2014
[ 10.930915] task: 8b44 ti: 8b426000 task.ti: 8b426000
[ 10.930915] task: 8b44 ti: 8b426000 task.ti: 8b426000
[ 10.932179] EIP: 0060:[<8102e631>] EFLAGS: 00010246 CPU: 0
[ 10.932179] EIP: 0060:[<8102e631>] EFLAGS: 00010246 CPU: 0
[ 10.933391] EIP is at bad_uaccess_kernel_ds+0xe/0x10
[ 10.933391] EIP is at bad_uaccess_kernel_ds+0xe/0x10
[ 10.934483] EAX: 003e EBX: 813de9b8 ECX: 81077607 EDX: 8b44
[ 10.934483] EAX: 003e EBX: 813de9b8 ECX: 81077607 EDX: 8b44
[ 10.935909] ESI: 7ff6afd0 EDI: fff7 EBP: 8b427ef8 ESP: 8b427ef0
[ 10.935909] ESI: 7ff6afd0 EDI: fff7 EBP: 8b427ef8 ESP: 8b427ef0
[ 10.937353] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 10.937353] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 10.938552] CR0: 80050033 CR2: bc60 CR3: 0087a000 CR4: 0690
[ 10.938552] CR0: 80050033 CR2: bc60 CR3: 0087a000 CR4: 0690
[ 10.939936] Stack:
[ 10.939936] Stack:
[ 10.940386] 81a330a5
[ 10.940386] 81a330a5 7ff6afd3 7ff6afd3 8b427f08 8b427f08 813deab5 813deab5
813de9b8 813de9b8 899cb780 899cb780 8b427f14 8b427f14 810edd0a 810edd0a
[ 10.942231] 899cb780
[ 10.942231] 899cb780 8b427f68 8b427f68 810ee465 810ee465 0002 0002
2180 2180 899cb3c8 899cb3c8 88d146a8 88d146a8 810e100b 810e100b
[ 10.944062] 0001
[ 10.944062] 0001 899cb3c0 899cb3c0
0014 0014 0804a2a5 0804a2a5 8b427f60 8b427f60 810e1d7c 810e1d7c
[ 10.945951] Call Trace:
[ 10.945951] Call Trace:
[ 10.946493] [<813deab5>] wafwdt_ioctl+0xfd/0x14a
[ 10.946493] [<813deab5>] wafwdt_ioctl+0xfd/0x14a
[ 10.947528] [<813de9b8>] ? wafwdt_write+0x63/0x63
[ 10.947528] [<813de9b8>] ? wafwdt_write+0x63/0x63
[ 10.948611] [<810edd0a>] vfs_ioctl+0x17/0x21
[ 10.948611] [<810edd0a>] vfs_ioctl+0x17/0x21
[ 10.949568] [<810ee465>] do_vfs_ioctl+0x5bd/0x5ef
[ 10.949568] [<810ee465>] do_vfs_ioctl+0x5bd/0x5ef
[ 10.950620] [<810e100b>] ? fsnotify_modify+0x48/0x53
[ 10.950620] [<810e100b>] ? fsnotify_modify+0x48/0x53
[ 10.951781] [<810e1d7c>] ? vfs_write+0x9a/0xa6
[ 10.951781] [<810e1d7c>] ? vfs_write+0x9a/0xa6
[ 10.952781] [<810f61f6>] ? __fget_light+0x38/0x5a
[ 10.952781] [<810f61f6>] ? __fget_light+0x38/0x5a
[ 10.953909] [<810ee4c3>] SyS_ioctl+0x2c/0x45
[ 10.953909] [<810ee4c3>] SyS_ioctl+0x2c/0x45
[ 10.954866] [<81000d1c>]
806ebc1465: BUG: tried to access memory at 0x7ff6afd3 while not in USER_DS
FYI, we noticed the following commit:
https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/uaccess
commit 806ebc146567cb0030460ebf34ebecfb7c67eb76 ("[DEBUG] force
CONFIG_DEBUG_UACCESS")
on test machine: vm-lkp-wsx03-openwrt-i386: 1 threads qemu-system-i386
-enable-kvm with 192M memory
caused below changes:
++++
|| 899f263944 | 806ebc1465 |
++++
| boot_successes | 6 | 0 |
| boot_failures | 4 | 12 |
| IP-Config:Auto-configuration_of_network_failed | 4 ||
| BUG:tried_to_access_memory_at#while_not_in_USER_DS | 0 | 12 |
| kernel_BUG_at_arch/x86/mm/extable.c| 0 | 12 |
| invalid_opcode:#[##]SMP| 0 | 12 |
| EIP_is_at_bad_uaccess_kernel_ds| 0 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 12 |
| backtrace:do_vfs_ioctl | 0 | 6 |
| backtrace:SyS_ioctl| 0 | 6 |
| backtrace:do_execve| 0 | 2 |
| backtrace:SyS_execve | 0 | 2 |
++++
[ 10.893589] Write protecting the kernel read-only data: 3932k
procd: Console is alive
procd: - watchdog -
[ 10.922394] BUG: tried to access memory at 0x7ff6afd3 while not in USER_DS
[ 10.922394] BUG: tried to access memory at 0x7ff6afd3 while not in USER_DS
[ 10.923957] [ cut here ]
[ 10.923957] [ cut here ]
[ 10.924977] kernel BUG at arch/x86/mm/extable.c:189!
[ 10.924977] kernel BUG at arch/x86/mm/extable.c:189!
[ 10.926382] invalid opcode: [#1] SMP
[ 10.926382] invalid opcode: [#1] SMP
[ 10.927270] CPU: 0 PID: 1 Comm: init Not tainted 4.7.0-rc2-00014-g806ebc1
#403
[ 10.927270] CPU: 0 PID: 1 Comm: init Not tainted 4.7.0-rc2-00014-g806ebc1
#403
[ 10.928893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Debian-1.8.2-1 04/01/2014
[ 10.928893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Debian-1.8.2-1 04/01/2014
[ 10.930915] task: 8b44 ti: 8b426000 task.ti: 8b426000
[ 10.930915] task: 8b44 ti: 8b426000 task.ti: 8b426000
[ 10.932179] EIP: 0060:[<8102e631>] EFLAGS: 00010246 CPU: 0
[ 10.932179] EIP: 0060:[<8102e631>] EFLAGS: 00010246 CPU: 0
[ 10.933391] EIP is at bad_uaccess_kernel_ds+0xe/0x10
[ 10.933391] EIP is at bad_uaccess_kernel_ds+0xe/0x10
[ 10.934483] EAX: 003e EBX: 813de9b8 ECX: 81077607 EDX: 8b44
[ 10.934483] EAX: 003e EBX: 813de9b8 ECX: 81077607 EDX: 8b44
[ 10.935909] ESI: 7ff6afd0 EDI: fff7 EBP: 8b427ef8 ESP: 8b427ef0
[ 10.935909] ESI: 7ff6afd0 EDI: fff7 EBP: 8b427ef8 ESP: 8b427ef0
[ 10.937353] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 10.937353] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 10.938552] CR0: 80050033 CR2: bc60 CR3: 0087a000 CR4: 0690
[ 10.938552] CR0: 80050033 CR2: bc60 CR3: 0087a000 CR4: 0690
[ 10.939936] Stack:
[ 10.939936] Stack:
[ 10.940386] 81a330a5
[ 10.940386] 81a330a5 7ff6afd3 7ff6afd3 8b427f08 8b427f08 813deab5 813deab5
813de9b8 813de9b8 899cb780 899cb780 8b427f14 8b427f14 810edd0a 810edd0a
[ 10.942231] 899cb780
[ 10.942231] 899cb780 8b427f68 8b427f68 810ee465 810ee465 0002 0002
2180 2180 899cb3c8 899cb3c8 88d146a8 88d146a8 810e100b 810e100b
[ 10.944062] 0001
[ 10.944062] 0001 899cb3c0 899cb3c0
0014 0014 0804a2a5 0804a2a5 8b427f60 8b427f60 810e1d7c 810e1d7c
[ 10.945951] Call Trace:
[ 10.945951] Call Trace:
[ 10.946493] [<813deab5>] wafwdt_ioctl+0xfd/0x14a
[ 10.946493] [<813deab5>] wafwdt_ioctl+0xfd/0x14a
[ 10.947528] [<813de9b8>] ? wafwdt_write+0x63/0x63
[ 10.947528] [<813de9b8>] ? wafwdt_write+0x63/0x63
[ 10.948611] [<810edd0a>] vfs_ioctl+0x17/0x21
[ 10.948611] [<810edd0a>] vfs_ioctl+0x17/0x21
[ 10.949568] [<810ee465>] do_vfs_ioctl+0x5bd/0x5ef
[ 10.949568] [<810ee465>] do_vfs_ioctl+0x5bd/0x5ef
[ 10.950620] [<810e100b>] ? fsnotify_modify+0x48/0x53
[ 10.950620] [<810e100b>] ? fsnotify_modify+0x48/0x53
[ 10.951781] [<810e1d7c>] ? vfs_write+0x9a/0xa6
[ 10.951781] [<810e1d7c>] ? vfs_write+0x9a/0xa6
[ 10.952781] [<810f61f6>] ? __fget_light+0x38/0x5a
[ 10.952781] [<810f61f6>] ? __fget_light+0x38/0x5a
[ 10.953909] [<810ee4c3>] SyS_ioctl+0x2c/0x45
[ 10.953909] [<810ee4c3>] SyS_ioctl+0x2c/0x45
[ 10.954866] [<81000d1c>]
