On Fri, 10 Jan 2014 19:23:26 +0100 Daniel Borkmann <borkm...@iogearbox.net> wrote:
> This is being reliably triggered for each mmaped() packet(7) > socket from user space, basically during unmapping resp. > closing the TX socket. > > I believe due to some change in transparent hugepages code ? > > When I disable transparent hugepages, everything works fine, > no BUG triggered. > > I'd be happy to test patches. Did the inclusion of c424be1cbbf852e46acc8 ("mm: munlock: fix a bug where THP tail page is encountered") in current mainline fix this? > With using default kernel config: > > [ 63.887947] kernel BUG at include/linux/page-flags.h:415! > [ 63.889296] invalid opcode: 0000 [#4] SMP > [ 63.890637] Modules linked in: fuse ebtable_nat xt_CHECKSUM bridge stp llc > rfcomm bnep nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE > ip6table_nat nf_nat_ipv6 ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 > nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle > nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter > ebtables ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek > snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm iwlwifi > snd_page_alloc btusb snd_timer bluetooth cfg80211 wmi joydev thinkpad_acpi > snd iTCO_wdt iTCO_vendor_support pcspkr e1000e tpm_tis tpm uvcvideo i2c_i801 > soundcore sdhci_pci sdhci lpc_ich rfkill videobuf2_vmalloc videobuf2_memops > videobuf2_core mmc_core mfd_core ptp videodev pps_core media uinput i915 > [ 63.895055] i2c_algo_bit drm_kms_helper drm i2c_core video > [ 63.896529] CPU: 2 PID: 1598 Comm: trafgen Tainted: G D > 3.13.0-rc6+ #12 > [ 63.898010] Hardware name: LENOVO 2429BP3/2429BP3, BIOS G4ET37WW (1.12 ) > 05/29/2012 > [ 63.899494] task: ffff8801eca6c1a0 ti: ffff88020e694000 task.ti: > ffff88020e694000 > [ 63.900988] RIP: 0010:[<ffffffff8168a492>] [<ffffffff8168a492>] > PageTransHuge.part.11+0x4/0x6 > [ 63.902498] RSP: 0018:ffff88020e695df8 EFLAGS: 00010282 > [ 63.903996] RAX: 005fffc000008004 RBX: ffff88020254cac8 RCX: > 00000000078ed340 > [ 63.905492] RDX: ffffffff8116b3c6 RSI: 0000000000000001 RDI: > ffff88020cf80640 > [ 63.906992] RBP: ffff88020e695df8 R08: 0000000000000000 R09: > 0000000000000000 > [ 63.908485] R10: ffff8801eca6c1a0 R11: 00000000100000fb R12: > ffffea00078ed340 > [ 63.909970] R13: ffff88020e695f48 R14: 00007f274a5f3000 R15: > 00007f274a5f4000 > [ 63.911456] FS: 00007f274e5f3740(0000) GS:ffff88021e280000(0000) > knlGS:0000000000000000 > [ 63.912946] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 63.914430] CR2: 0000003724a35a90 CR3: 00000001eabb6000 CR4: > 00000000001407e0 > [ 63.915919] Stack: > [ 63.917404] ffff88020e695ee0 ffffffff8116fa7a 0000000ed78ec480 > 00007f274e5f2fff > [ 63.918913] 0000000000000001 00007f274e5f3000 00000000810c864b > ffff8801fb16aca8 > [ 63.920430] 0000000000000000 0000000000000000 ffff88020e695e58 > 0000000000000046 > [ 63.921938] Call Trace: > [ 63.923451] [<ffffffff8116fa7a>] munlock_vma_pages_range+0x2ea/0x2f0 > [ 63.924978] [<ffffffff810a07bd>] ? trace_hardirqs_off+0xd/0x10 > [ 63.926454] [<ffffffff81171b32>] ? vma_merge+0xc2/0x330 > [ 63.927870] [<ffffffff8116fb7c>] mlock_fixup+0xfc/0x190 > [ 63.929288] [<ffffffff8116fdc7>] do_mlockall+0x87/0xc0 > [ 63.930702] [<ffffffff811702bf>] sys_munlockall+0x2f/0x50 > [ 63.932117] [<ffffffff8169df52>] system_call_fastpath+0x16/0x1b > [ 63.933531] Code: c1 e0 06 48 29 d8 eb 02 31 c0 5b 41 5c 5d c3 55 48 89 e5 > 0f 0b 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55 48 89 e5 <0f> > 0b 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55 48 8b 07 31 c9 48 > [ 63.935103] RIP [<ffffffff8168a492>] PageTransHuge.part.11+0x4/0x6 > [ 63.936580] RSP <ffff88020e695df8> > [ 63.938021] ---[ end trace 67b7aa3fba09186d ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/