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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1628686
Title:
kernel BUG at linux-4.8.0/mm/usercopy.c:75!
Status in linux package in Ubuntu:
Incomplete
Bug description:
This kernel warning occurs on Ubuntu 16.10 guests with Linux 4.8 on
VMware Fusion. The VM will boot but does not make it a graphical
display.
usercopy: kernel memory overwrite attempt detected to ffff9bdaf3e00000
(<spans multiple pages>) (4392 bytes)
------------[ cut here ]------------
kernel BUG at /build/linux-FGN3Aj/linux-4.8.0/mm/usercopy.c:75!
invalid opcode: 0000 [#1] SMP
Modules linked in: intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel ipmi_msghandler aesni_intel vmw_balloon aes_x86_64 lrw
glue_helper ablk_helper cryptd intel_rapl_perf joydev input_leds serio_raw
binfmt_misc snd_ens1371 snd_ac97_codec gameport ac97_bus snd_pcm uvcvideo
videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core snd_seq_midi
videodev snd_seq_midi_event media snd_rawmidi snd_seq snd_seq_device btusb
btrtl btbcm snd_timer btintel snd bluetooth soundcore i2c_piix4 vmw_vmci shpchp
nfit floppy(+) mac_hid parport_pc ppdev lp parport ip_tables x_tables autofs4
hid_generic usbhid hid vmwgfx ttm psmouse drm_kms_helper syscopyarea
sysfillrect ahci libahci e1000 mptspi mptscsih mptbase scsi_transport_spi
sysimgblt fb_sys_fops drm pata_acpi fjes
CPU: 0 PID: 1293 Comm: glxinfo Not tainted 4.8.0-17-generic #19-Ubuntu
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference
Platform, BIOS 6.00 07/02/2015
task: ffff9bdb74465580 task.stack: ffff9bdb73f00000
RIP: 0010:[<ffffffff9cc2e421>] [<ffffffff9cc2e421>]
__check_object_size+0x111/0x49b
RSP: 0018:ffff9bdb73f03c58 EFLAGS: 00010282
RAX: 000000000000006c RBX: ffff9bdaf3e00000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff9bdb7a60dc68 RDI: ffff9bdb7a60dc68
RBP: ffff9bdb73f03ca0 R08: 79706f6372657375 R09: 656b203a79706f63
R10: 00003fffc0000000 R11: 00000000000006c1 R12: 0000000000001128
R13: 0000000000000000 R14: ffff9bdaf3e01128 R15: ffff9bdaf3e01127
FS: 00007f22f6d20740(0000) GS:ffff9bdb7a600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b6cf2c71c8 CR3: 00000000b3f91000 CR4: 00000000001406f0
Stack:
ffff9bdb73f16ce8 ffff9bdb73f03ca0 ffffffffc03df765 00003fffc0000000
ffff9bdaf41c0000 000055b6cf0ca1b0 ffff9bdb73edbc00 ffff9bdaf3e00000
0000000000001128 ffff9bdb73f03d90 ffffffffc03c6f0f ffff9bdb73f03d08
Call Trace:
[<ffffffffc03df765>] ? vmw_cmdbuf_alloc+0x175/0x240 [vmwgfx]
[<ffffffffc03c6f0f>] vmw_execbuf_process+0x8bf/0x1250 [vmwgfx]
[<ffffffff9cc2e43d>] ? __check_object_size+0x12d/0x49b
[<ffffffffc0246dd6>] ? drm_ioctl+0x236/0x4f0 [drm]
[<ffffffff9cbab015>] ? __alloc_pages_nodemask+0x135/0x300
[<ffffffffc03b0cb4>] ? ttm_read_lock+0x34/0xc0 [ttm]
[<ffffffffc03c79c6>] vmw_execbuf_ioctl+0xe6/0x180 [vmwgfx]
[<ffffffffc03cb919>] vmw_generic_ioctl+0x249/0x280 [vmwgfx]
[<ffffffffc03cb985>] vmw_unlocked_ioctl+0x15/0x20 [vmwgfx]
[<ffffffff9cc47843>] do_vfs_ioctl+0xa3/0x610
[<ffffffff9ca6b3b3>] ? __do_page_fault+0x203/0x4d0
[<ffffffff9cc47e29>] SyS_ioctl+0x79/0x90
[<ffffffff9d299c76>] entry_SYSCALL_64_fastpath+0x1e/0xa8
Code: 1f 03 00 00 49 c7 c0 86 36 6a 9d 48 c7 c2 30 0b 68 9d 48 c7 c6 4c 8e 69
9d 4d 89 e1 48 89 d9 48 c7 c7 10 03 6a 9d e8 03 05 f7 ff <0f> 0b 4c 8b 75 b8 48
8b 5d d0 45 89 fd 4c 8b 65 c8 4c 89 e6 48
RIP [<ffffffff9cc2e421>] __check_object_size+0x111/0x49b
RSP <ffff9bdb73f03c58>
---[ end trace 48bce713521eb13e ]---
Disabling CONFIG_HARDENED_USERCOPY_PAGESPAN works around this issue.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8e1f74ea02cf4562404c48c6882214821552c13f
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