Public bug reported:
During Alpha-2 automated testing, I saw the following in a log:
19:35:02 [ 2.475810] systemd-udevd[95]: starting version 204
19:35:02 [ 2.547049] ------------[ cut here ]------------
19:35:02 [ 2.547065] WARNING: CPU: 0 PID: 97 at
/build/buildd/linux-3.16.0/mm/vmalloc.c:128
vmap_page_range_noflush+0x2d1/0x370()
19:35:02 [ 2.547069] Modules linked in:
19:35:02 [ 2.547073] CPU: 0 PID: 97 Comm: systemd-udevd Not tainted
3.16.0-6-generic #11-Ubuntu
19:35:02 [ 2.547077] 0000000000000009 ffff880002defb98 ffffffff81755538
0000000000000000
19:35:02 [ 2.547082] ffff880002defbd0 ffffffff8106bb0d ffff88000400ec88
0000000000000001
19:35:02 [ 2.547086] ffff880002fcfb00 ffffffffc0391000 0000000000000000
ffff880002defbe0
19:35:02 [ 2.547090] Call Trace:
19:35:02 [ 2.547096] [<ffffffff81755538>] dump_stack+0x45/0x56
19:35:02 [ 2.547101] [<ffffffff8106bb0d>] warn_slowpath_common+0x7d/0xa0
19:35:02 [ 2.547104] [<ffffffff8106bbea>] warn_slowpath_null+0x1a/0x20
19:35:02 [ 2.547108] [<ffffffff81197c31>]
vmap_page_range_noflush+0x2d1/0x370
19:35:02 [ 2.547112] [<ffffffff81197cfe>] map_vm_area+0x2e/0x40
19:35:02 [ 2.547115] [<ffffffff8119a058>] __vmalloc_node_range+0x188/0x280
19:35:02 [ 2.547120] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547124] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547129] [<ffffffff8104f294>] module_alloc+0x74/0xd0
19:35:02 [ 2.547132] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547135] [<ffffffff810e92b4>]
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547146] [<ffffffff810e9a6c>] layout_and_allocate+0x74c/0xc70
19:35:02 [ 2.547149] [<ffffffff810ea063>] load_module+0xd3/0x1b70
19:35:02 [ 2.547154] [<ffffffff811cfeb1>] ? vfs_read+0xf1/0x170
19:35:02 [ 2.547157] [<ffffffff810e7aa1>] ?
copy_module_from_fd.isra.46+0x121/0x180
19:35:02 [ 2.547161] [<ffffffff810ebc76>] SyS_finit_module+0x86/0xb0
19:35:02 [ 2.547167] [<ffffffff8175de7f>] tracesys+0xe1/0xe6
19:35:02 [ 2.547169] ---[ end trace 8a5de7fc66e75fe4 ]---
19:35:02 [ 2.547172] vmalloc: allocation failure, allocated 20480 of 24576
bytes
19:35:02 [ 2.547175] systemd-udevd: page allocation failure: order:0,
mode:0xd2
19:35:02 [ 2.547180] CPU: 0 PID: 97 Comm: systemd-udevd Tainted: G W
3.16.0-6-generic #11-Ubuntu
19:35:02 [ 2.547183] ffffffff81a88bc0 ffff880002defc08 ffffffff81755538
00000000000000d2
19:35:02 [ 2.547187] ffff880002defc90 ffffffff811642bf ffffffff81a88bc0
ffff880002defc28
19:35:02 [ 2.547191] 00003fff00000018 ffff880002defca0 ffff880002defc40
0000000000000163
19:35:02 [ 2.547195] Call Trace:
19:35:02 [ 2.547197] [<ffffffff81755538>] dump_stack+0x45/0x56
19:35:02 [ 2.547202] [<ffffffff811642bf>] warn_alloc_failed+0xdf/0x130
19:35:02 [ 2.547207] [<ffffffff8119a118>] __vmalloc_node_range+0x248/0x280
19:35:02 [ 2.547210] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547214] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547217] [<ffffffff8104f294>] module_alloc+0x74/0xd0
19:35:02 [ 2.547220] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547224] [<ffffffff810e92b4>]
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547229] [<ffffffff810e9a6c>] layout_and_allocate+0x74c/0xc70
19:35:02 [ 2.547232] [<ffffffff810ea063>] load_module+0xd3/0x1b70
19:35:02 [ 2.547235] [<ffffffff811cfeb1>] ? vfs_read+0xf1/0x170
19:35:02 [ 2.547238] [<ffffffff810e7aa1>] ?
copy_module_from_fd.isra.46+0x121/0x180
19:35:02 [ 2.547242] [<ffffffff810ebc76>] SyS_finit_module+0x86/0xb0
19:35:02 [ 2.547246] [<ffffffff8175de7f>] tracesys+0xe1/0xe6
19:35:02 [ 2.547248] Mem-Info:
** Affects: linux (Ubuntu)
Importance: High
Status: Confirmed
** Package changed: ubuntu => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1350522
Title:
EC2 kernel crash due to vmalloc
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
During Alpha-2 automated testing, I saw the following in a log:
19:35:02 [ 2.475810] systemd-udevd[95]: starting version 204
19:35:02 [ 2.547049] ------------[ cut here ]------------
19:35:02 [ 2.547065] WARNING: CPU: 0 PID: 97 at
/build/buildd/linux-3.16.0/mm/vmalloc.c:128
vmap_page_range_noflush+0x2d1/0x370()
19:35:02 [ 2.547069] Modules linked in:
19:35:02 [ 2.547073] CPU: 0 PID: 97 Comm: systemd-udevd Not tainted
3.16.0-6-generic #11-Ubuntu
19:35:02 [ 2.547077] 0000000000000009 ffff880002defb98 ffffffff81755538
0000000000000000
19:35:02 [ 2.547082] ffff880002defbd0 ffffffff8106bb0d ffff88000400ec88
0000000000000001
19:35:02 [ 2.547086] ffff880002fcfb00 ffffffffc0391000 0000000000000000
ffff880002defbe0
19:35:02 [ 2.547090] Call Trace:
19:35:02 [ 2.547096] [<ffffffff81755538>] dump_stack+0x45/0x56
19:35:02 [ 2.547101] [<ffffffff8106bb0d>] warn_slowpath_common+0x7d/0xa0
19:35:02 [ 2.547104] [<ffffffff8106bbea>] warn_slowpath_null+0x1a/0x20
19:35:02 [ 2.547108] [<ffffffff81197c31>]
vmap_page_range_noflush+0x2d1/0x370
19:35:02 [ 2.547112] [<ffffffff81197cfe>] map_vm_area+0x2e/0x40
19:35:02 [ 2.547115] [<ffffffff8119a058>]
__vmalloc_node_range+0x188/0x280
19:35:02 [ 2.547120] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547124] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547129] [<ffffffff8104f294>] module_alloc+0x74/0xd0
19:35:02 [ 2.547132] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547135] [<ffffffff810e92b4>]
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547146] [<ffffffff810e9a6c>] layout_and_allocate+0x74c/0xc70
19:35:02 [ 2.547149] [<ffffffff810ea063>] load_module+0xd3/0x1b70
19:35:02 [ 2.547154] [<ffffffff811cfeb1>] ? vfs_read+0xf1/0x170
19:35:02 [ 2.547157] [<ffffffff810e7aa1>] ?
copy_module_from_fd.isra.46+0x121/0x180
19:35:02 [ 2.547161] [<ffffffff810ebc76>] SyS_finit_module+0x86/0xb0
19:35:02 [ 2.547167] [<ffffffff8175de7f>] tracesys+0xe1/0xe6
19:35:02 [ 2.547169] ---[ end trace 8a5de7fc66e75fe4 ]---
19:35:02 [ 2.547172] vmalloc: allocation failure, allocated 20480 of
24576 bytes
19:35:02 [ 2.547175] systemd-udevd: page allocation failure: order:0,
mode:0xd2
19:35:02 [ 2.547180] CPU: 0 PID: 97 Comm: systemd-udevd Tainted: G
W 3.16.0-6-generic #11-Ubuntu
19:35:02 [ 2.547183] ffffffff81a88bc0 ffff880002defc08 ffffffff81755538
00000000000000d2
19:35:02 [ 2.547187] ffff880002defc90 ffffffff811642bf ffffffff81a88bc0
ffff880002defc28
19:35:02 [ 2.547191] 00003fff00000018 ffff880002defca0 ffff880002defc40
0000000000000163
19:35:02 [ 2.547195] Call Trace:
19:35:02 [ 2.547197] [<ffffffff81755538>] dump_stack+0x45/0x56
19:35:02 [ 2.547202] [<ffffffff811642bf>] warn_alloc_failed+0xdf/0x130
19:35:02 [ 2.547207] [<ffffffff8119a118>]
__vmalloc_node_range+0x248/0x280
19:35:02 [ 2.547210] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547214] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547217] [<ffffffff8104f294>] module_alloc+0x74/0xd0
19:35:02 [ 2.547220] [<ffffffff810e92b4>] ?
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547224] [<ffffffff810e92b4>]
module_alloc_update_bounds+0x14/0x70
19:35:02 [ 2.547229] [<ffffffff810e9a6c>] layout_and_allocate+0x74c/0xc70
19:35:02 [ 2.547232] [<ffffffff810ea063>] load_module+0xd3/0x1b70
19:35:02 [ 2.547235] [<ffffffff811cfeb1>] ? vfs_read+0xf1/0x170
19:35:02 [ 2.547238] [<ffffffff810e7aa1>] ?
copy_module_from_fd.isra.46+0x121/0x180
19:35:02 [ 2.547242] [<ffffffff810ebc76>] SyS_finit_module+0x86/0xb0
19:35:02 [ 2.547246] [<ffffffff8175de7f>] tracesys+0xe1/0xe6
19:35:02 [ 2.547248] Mem-Info:
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