https://bugzilla.novell.com/show_bug.cgi?id=807850 https://bugzilla.novell.com/show_bug.cgi?id=807850#c0 Summary: kernel BUG + full hang on drop_caches Classification: openSUSE Product: openSUSE 12.3 Version: RC 2 Platform: x86-64 OS/Version: Other Status: NEW Severity: Critical Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: munderl@tnt.uni-hannover.de QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0 echo 1 > /proc/sys/vm/drop_caches leads to immediate kernel BUG. Kernel hangs in an endless loop afterwards. Happens with default and desktop, on 3.7.10 and 3.7.9. [ 81.876598] BUG: unable to handle kernel NULL pointer dereference at 0000000000000058 [ 81.877186] IP: [<ffffffff81190be4>] drop_pagecache_sb+0x74/0xe0 [ 81.877803] PGD 252bc1067 PUD 253d11067 PMD 0 [ 81.878391] Oops: 0000 [#1] SMP [ 81.878965] Modules linked in: fuse af_packet xt_tcpudp xt_pkttype xt_LOG xt_limit bnep bluetooth ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw ipt_REJECT iptable_raw xt_CT iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq snd_hda_codec_hdmi mperf coretemp snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep kvm_intel snd_pcm arc4 snd_seq snd_timer snd_seq_device kvm iwldvm mac80211 snd uvcvideo crc32c_intel videobuf2_core videodev ghash_clmulni_intel aesni_intel ablk_helper cryptd lrw videobuf2_vmalloc aes_x86_64 iTCO_wdt xts tpm_infineon mei r8169 videobuf2_memops iTCO_vendor_support sr_mod lpc_ich iwlwifi gf128mul sony_laptop rts_pstor(C) cdrom i2c_i801 tpm_tis tpm tpm_bios battery mfd_core soundcore snd_page_alloc cfg80211 rfkill ac sg microcode pcspkr autofs4 xhci_hcd ehci_hcd usbcore usb_common radeon i915 video ttm drm_kms_helper drm i2c_algo_bit thermal button processor thermal_sys scsi_dh_emc scsi_dh_rdac scsi_dh_hp_sw scsi_dh_alua scsi_dh [ 81.883248] CPU 0 [ 81.883256] Pid: 1452, comm: bash Tainted: G C 3.7.10-1.1-default #1 Sony Corporation VPCSA4W9E/VAIO [ 81.884813] RIP: 0010:[<ffffffff81190be4>] [<ffffffff81190be4>] drop_pagecache_sb+0x74/0xe0 [ 81.885602] RSP: 0018:ffff880252bc9e18 EFLAGS: 00010246 [ 81.886391] RAX: 0000000000000000 RBX: ffff88024ecb7db0 RCX: 0000000000000002 [ 81.887216] RDX: 0000000000000007 RSI: ffff88024f63a670 RDI: ffff88024ecb7e38 [ 81.888010] RBP: ffff88024ecb7e38 R08: dead000000200200 R09: 0000000000000000 [ 81.888809] R10: 0000000000000001 R11: 0000000000000210 R12: ffff880254d588a0 [ 81.889616] R13: ffff88024fcb25e8 R14: ffffffff81190b70 R15: ffffffffffffffea [ 81.890428] FS: 00007fad2b9ed700(0000) GS:ffff88025fa00000(0000) knlGS:0000000000000000 [ 81.891251] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.892083] CR2: 0000000000000058 CR3: 0000000252ad2000 CR4: 00000000000407f0 [ 81.892969] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.893863] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 81.894761] Process bash (pid: 1452, threadinfo ffff880252bc8000, task ffff880253d321c0) [ 81.895684] Stack: [ 81.896594] 0000000000000001 ffff880254d58800 ffff880254e94800 ffff880254d58868 [ 81.897529] 0000000000000000 ffffffff8116a499 0000000000000000 0000000000000001 [ 81.898470] ffffffff81a228a0 ffff880252bc9f50 0000000000000002 ffffffff81190cce [ 81.899421] Call Trace: [ 81.900365] [<ffffffff8116a499>] iterate_supers+0xd9/0xe0 [ 81.901320] [<ffffffff81190cce>] drop_caches_sysctl_handler+0x7e/0x90 [ 81.902285] [<ffffffff811d0e26>] proc_sys_call_handler.isra.10+0xc6/0xe0 [ 81.903260] [<ffffffff81166fd7>] vfs_write+0xa7/0x180 [ 81.904239] [<ffffffff81167321>] sys_write+0x51/0xa0 [ 81.905216] [<ffffffff8154f2ed>] system_call_fastpath+0x1a/0x1f [ 81.906204] [<00007fad2ae959c0>] 0x7fad2ae959bf [ 81.907194] Code: 01 00 00 49 39 c4 48 8d 98 00 ff ff ff 74 68 48 8d ab 88 00 00 00 48 89 ef e8 49 69 3b 00 f6 83 a0 00 00 00 38 75 d0 48 8b 43 30 <48> 83 78 58 00 74 c5 48 89 df e8 dd ef fe ff 66 83 45 00 01 66 [ 81.909430] RIP [<ffffffff81190be4>] drop_pagecache_sb+0x74/0xe0 [ 81.910532] RSP <ffff880252bc9e18> [ 81.911640] CR2: 0000000000000058 Reproducible: Always Steps to Reproduce: 1. echo 1 > /proc/sys/vm/drop_caches 2. 3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.