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Message-ID: <CAMEtUuwdfb63wcDDBYjAEYRR8DXGrsp60C1sE7WdXEwKqcfSTQ@mail.gmail.com>
Date: Mon, 9 Dec 2013 18:38:11 -0800
From: Alexei Starovoitov <ast@...mgrid.com>
To: linux-kernel@...r.kernel.org
Subject: might_sleep warning in filemap_fault()
Hi,
seeing the following trace on 3.10.xx kernels, including 3.10.23.
3.12.4 and 3.13rc2 are fine.
Is there a patch waiting to be backported?
[ 96.393807] llc[2903]: segfault at 8 ip 0000000000692da7 sp
00007fff1a6baf30 error 4 in llc[400000+7f8000]
[ 96.394304] BUG: sleeping function called from invalid context at
include/linux/pagemap.h:375
[ 96.394306] in_atomic(): 0, irqs_disabled(): 1, pid: 2903, name: llc
[ 96.394307] 1 lock held by llc/2903:
[ 96.394308] #0: (sb_writers#8){.+.+.+}, at: [<ffffffff81205033>]
do_coredump+0xf83/0x1110
[ 96.394314] irq event stamp: 68216
[ 96.394315] hardirqs last enabled at (68215): [<ffffffff816864a1>]
__mutex_unlock_slowpath+0xd1/0x180
[ 96.394318] hardirqs last disabled at (68216): [<ffffffff81002b55>]
math_state_restore+0x35/0x150
[ 96.394320] softirqs last enabled at (65780): [<ffffffff8104f663>]
__do_softirq+0x183/0x3f0
[ 96.394322] softirqs last disabled at (65761): [<ffffffff8104fa85>]
irq_exit+0xb5/0xc0
[ 96.394325] CPU: 1 PID: 2903 Comm: llc Not tainted 3.10.1 #31
[ 96.394326] Hardware name: System manufacturer System Product
Name/P8Z77 WS, BIOS 3007 07/26/2012
[ 96.394327] ffffffff819fcac9 ffff8807f5ec96e8 ffffffff81682103
ffff8807f5ec9718
[ 96.394329] ffffffff81081e60 00000000000007fa 00000000000007fa
ffff8807f5fe6f00
[ 96.394331] ffff880809bc81e0 ffff8807f5ec9788 ffffffff8114149e
0000000000000006
[ 96.394333] Call Trace:
[ 96.394335] [<ffffffff81682103>] dump_stack+0x19/0x1b
[ 96.394338] [<ffffffff81081e60>] __might_sleep+0x180/0x230
[ 96.394340] [<ffffffff8114149e>] filemap_fault+0xce/0x470
[ 96.394342] [<ffffffff81165dbe>] __do_fault+0x6e/0x470
[ 96.394344] [<ffffffff81168a9f>] handle_pte_fault+0x8f/0x8b0
[ 96.394346] [<ffffffff81169ac0>] handle_mm_fault+0x210/0x300
[ 96.394348] [<ffffffff81169e1e>] __get_user_pages+0x19e/0x5c0
[ 96.394349] [<ffffffff8116a285>] get_dump_page+0x45/0x60
[ 96.394351] [<ffffffff811fe371>] elf_core_dump+0x16b1/0x1930
[ 96.394353] [<ffffffff811fd6cc>] ? elf_core_dump+0xa0c/0x1930
[ 96.394356] [<ffffffff811a2f0f>] ? __sb_start_write+0xef/0x1c0
[ 96.394358] [<ffffffff81205033>] ? do_coredump+0xf83/0x1110
[ 96.394359] [<ffffffff81205033>] ? do_coredump+0xf83/0x1110
[ 96.394361] [<ffffffff81204ce9>] do_coredump+0xc39/0x1110
[ 96.394364] [<ffffffff8105fc02>] get_signal_to_deliver+0x2b2/0x930
[ 96.394366] [<ffffffff81002387>] do_signal+0x57/0x5a0
[ 96.394368] [<ffffffff8168df6b>] ? __do_page_fault+0x50b/0x570
[ 96.394370] [<ffffffff81060434>] ? __set_current_blocked+0x34/0x60
[ 96.394372] [<ffffffff8167d1f9>] ? printk+0x61/0x63
[ 96.394374] [<ffffffff810b9495>] ? trace_hardirqs_on_caller+0x105/0x1d0
[ 96.394376] [<ffffffff810b956d>] ? trace_hardirqs_on+0xd/0x10
[ 96.394378] [<ffffffff8168a10d>] ? retint_signal+0x11/0x84
[ 96.394380] [<ffffffff81002935>] do_notify_resume+0x65/0x80
[ 96.394382] [<ffffffff813349de>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[ 96.394384] [<ffffffff8168a142>] retint_signal+0x46/0x84
[ 96.394386] ------------[ cut here ]------------
[ 96.394388] WARNING: at kernel/lockdep.c:2740 lockdep_trace_alloc+0xc5/0xd0()
[ 96.394389] DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))
[ 96.394390] Modules linked in: bridge stp llc vhost_net macvtap
macvlan dm_crypt iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
kvm_intel kvm ghash_clmulni_intel aesni_intel ablk_helper cryptd lrw
gf128mul glue_helper aes_x86_64 hid_generic eeepc_wmi asus_wmi
sparse_keymap mxm_wmi led_class dm_multipath microcode usbhid hid
parport_pc ppdev psmouse e1000e lpc_ich firewire_ohci mfd_core igb
firewire_core crc_itu_t dca ptp pps_core binfmt_misc wmi lp parport
video
[ 96.394411] CPU: 1 PID: 2903 Comm: llc Not tainted 3.10.1 #31
[ 96.394412] Hardware name: System manufacturer System Product
Name/P8Z77 WS, BIOS 3007 07/26/2012
[ 96.394413] 0000000000000009 ffff8807f5ec9328 ffffffff81682103
ffff8807f5ec9368
[ 96.394415] ffffffff81045d80 0000000000000082 0000000000000096
0000000000000000
[ 96.394416] 0000000000000000 0000000000000003 0000000000000002
ffff8807f5ec93c8
[ 96.394418] Call Trace:
[ 96.394420] [<ffffffff81682103>] dump_stack+0x19/0x1b
[ 96.394422] [<ffffffff81045d80>] warn_slowpath_common+0x70/0xa0
[ 96.394424] [<ffffffff81045e66>] warn_slowpath_fmt+0x46/0x50
[ 96.394426] [<ffffffff810b9ac5>] lockdep_trace_alloc+0xc5/0xd0
[ 96.394428] [<ffffffff81148a7c>] __alloc_pages_nodemask+0x7c/0xa80
[ 96.394430] [<ffffffff8168a142>] ? retint_signal+0x46/0x84
[ 96.394432] [<ffffffff810b47e4>] ? __lock_is_held+0x54/0x80
[ 96.394434] [<ffffffff8132c0cb>] ? radix_tree_lookup_element+0xeb/0x190
[ 96.394437] [<ffffffff81185098>] alloc_pages_current+0xb8/0x180
[ 96.394439] [<ffffffff8113ecff>] __page_cache_alloc+0xaf/0xd0
[ 96.394441] [<ffffffff8113fb6f>] grab_cache_page_write_begin+0x7f/0xf0
[ 96.394443] [<ffffffff8124fd82>] ext4_da_write_begin+0x92/0x3a0
[ 96.394445] [<ffffffff8113e32e>] generic_file_buffered_write+0x11e/0x2a0
[ 96.394447] [<ffffffff811407bd>] __generic_file_aio_write+0x1cd/0x3d0
[ 96.394449] [<ffffffff816862cf>] ? mutex_lock_nested+0x27f/0x380
[ 96.394451] [<ffffffff81140a2a>] generic_file_aio_write+0x6a/0xd0
[ 96.394453] [<ffffffff81245cf9>] ext4_file_write+0xa9/0x450
[ 96.394455] [<ffffffff81689bdb>] ? _raw_spin_unlock+0x2b/0x50
[ 96.394456] [<ffffffff81168681>] ? follow_page_mask+0x261/0x4e0
[ 96.394458] [<ffffffff81165809>] ? spin_unlock+0x9/0x10
[ 96.394459] [<ffffffff81168866>] ? follow_page_mask+0x446/0x4e0
[ 96.394461] [<ffffffff8119fcb0>] do_sync_write+0x80/0xb0
[ 96.394463] [<ffffffff81203d09>] dump_write+0x59/0x70
[ 96.394465] [<ffffffff811fe3e4>] elf_core_dump+0x1724/0x1930
[ 96.394467] [<ffffffff811fd6cc>] ? elf_core_dump+0xa0c/0x1930
[ 96.394469] [<ffffffff811a2f0f>] ? __sb_start_write+0xef/0x1c0
[ 96.394471] [<ffffffff81205033>] ? do_coredump+0xf83/0x1110
[ 96.394472] [<ffffffff81205033>] ? do_coredump+0xf83/0x1110
[ 96.394474] [<ffffffff81204ce9>] do_coredump+0xc39/0x1110
[ 96.394476] [<ffffffff8105fc02>] get_signal_to_deliver+0x2b2/0x930
[ 96.394479] [<ffffffff81002387>] do_signal+0x57/0x5a0
[ 96.394480] [<ffffffff8168df6b>] ? __do_page_fault+0x50b/0x570
[ 96.394482] [<ffffffff81060434>] ? __set_current_blocked+0x34/0x60
[ 96.394483] [<ffffffff8167d1f9>] ? printk+0x61/0x63
[ 96.394485] [<ffffffff810b9495>] ? trace_hardirqs_on_caller+0x105/0x1d0
[ 96.394487] [<ffffffff810b956d>] ? trace_hardirqs_on+0xd/0x10
[ 96.394488] [<ffffffff8168a10d>] ? retint_signal+0x11/0x84
[ 96.394490] [<ffffffff81002935>] do_notify_resume+0x65/0x80
[ 96.394492] [<ffffffff813349de>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[ 96.394493] [<ffffffff8168a142>] retint_signal+0x46/0x84
[ 96.394495] ---[ end trace 254c0cab3bbaa900 ]---
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