https://bugzilla.kernel.org/show_bug.cgi?id=47731 Summary: Null pointer dereference at strchr Product: File System Version: 2.5 Kernel Version: 3.5.4 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 AssignedTo: fs_ext4@xxxxxxxxxxxxxxxxxxxx ReportedBy: brad.figg@xxxxxxxxxxxxx Regression: No This is a 3.5.0-15.20 Ubuntu kernel. I was running xfstests and got this oops. I am not sure which test caused it but the last test being run was 234. Nov 1 02:52:47 rizzo kernel: [11454.238205] BUG: unable to handle kernel NULL pointer dereference at 000000e5 Nov 1 02:52:47 rizzo kernel: [11454.249565] IP: [<c12d367f>] strchr+0xf/0x30 Nov 1 02:52:47 rizzo kernel: [11454.260460] *pdpt = 0000000036dd7001 *pde = 0000000000000000 Nov 1 02:52:47 rizzo kernel: [11454.271359] Oops: 0000 [#1] SMP Nov 1 02:52:47 rizzo kernel: [11454.282094] Modules linked in: quota_v2 quota_tree nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables xt_recent nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables x_tables bluetooth pppoe pppox irda crc_ccitt atm p8022 psnap llc p8023 ax25 btrfs zlib_deflate libcrc32c xfs ext2 dm_multipath scsi_dh vesafb coretemp kvm_intel kvm joydev i7core_edac edac_core gpio_ich microcode lpc_ich dcdbas mac_hid acpi_power_meter lp parport hid_generic usbhid hid mpt2sas bnx2 scsi_transport_sas raid_class [last unloaded: tipc] Nov 1 02:52:47 rizzo kernel: [11454.314893] Nov 1 02:52:47 rizzo kernel: [11454.314895] Pid: 32681, comm: setquota Tainted: G O 3.5.0-15-generic #20-Ubuntu Dell Inc. PowerEdge R310/05XKKK Nov 1 02:52:47 rizzo kernel: [11454.314898] EIP: 0060:[<c12d367f>] EFLAGS: 00210246 CPU: 3 Nov 1 02:52:47 rizzo kernel: [11454.314900] EIP is at strchr+0xf/0x30 Nov 1 02:52:47 rizzo kernel: [11454.314901] EAX: 00003d3d EBX: c15ebbf0 ECX: 00280000 EDX: 0000003d Nov 1 02:52:47 rizzo kernel: [11454.314902] ESI: 000000e5 EDI: d250fc00 EBP: ef2e3eac ESP: ef2e3ea8 Nov 1 02:52:47 rizzo kernel: [11454.314903] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 Nov 1 02:52:47 rizzo kernel: [11454.314904] CR0: 8005003b CR2: 000000e5 CR3: 291c4000 CR4: 000007f0 Nov 1 02:52:47 rizzo kernel: [11454.314905] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 Nov 1 02:52:47 rizzo kernel: [11454.314906] DR6: ffff0ff0 DR7: 00000400 Nov 1 02:52:47 rizzo kernel: [11454.314907] Process setquota (pid: 32681, ti=ef2e2000 task=c2943f70 task.ti=ef2e2000) Nov 1 02:52:47 rizzo kernel: [11454.314908] Stack: Nov 1 02:52:47 rizzo kernel: [11454.314908] 0000002d ef2e3ef8 c11e35df d2a67de0 c17925fd 0000002c c1791a80 c1161fc4 Nov 1 02:52:47 rizzo kernel: [11454.314913] 8c3ac810 0000002c e9e77400 8c02c010 ef2e3eec d250d800 00000000 2ca67de0 Nov 1 02:52:47 rizzo kernel: [11454.314917] d2a67de0 d2a67de0 c11e3930 f6c62a90 ef2e3f00 c11e3942 ef2e3f20 c1184e39 Nov 1 02:52:47 rizzo kernel: [11454.314921] Call Trace: Nov 1 02:52:47 rizzo kernel: [11454.314923] [<c11e35df>] _ext4_show_options+0x37f/0x6d0 Nov 1 02:52:47 rizzo kernel: [11454.314927] [<c1161fc4>] ? d_path+0xb4/0xd0 Nov 1 02:52:47 rizzo kernel: [11454.314930] [<c11e3930>] ? _ext4_show_options+0x6d0/0x6d0 Nov 1 02:52:47 rizzo kernel: [11454.314932] [<c11e3942>] ext4_show_options+0x12/0x20 Nov 1 02:52:47 rizzo kernel: [11454.314934] [<c1184e39>] show_vfsmnt+0xc9/0x110 Nov 1 02:52:47 rizzo kernel: [11454.314936] [<c11684f0>] m_show+0x10/0x20 Nov 1 02:52:47 rizzo kernel: [11454.314939] [<c116c1c4>] seq_read+0x244/0x3c0 Nov 1 02:52:47 rizzo kernel: [11454.314941] [<c116bf80>] ? seq_lseek+0x150/0x150 Nov 1 02:52:47 rizzo kernel: [11454.314943] [<c114f159>] vfs_read+0x89/0x160 Nov 1 02:52:47 rizzo kernel: [11454.314946] [<c116bf80>] ? seq_lseek+0x150/0x150 Nov 1 02:52:47 rizzo kernel: [11454.314948] [<c114f26d>] sys_read+0x3d/0x70 Nov 1 02:52:47 rizzo kernel: [11454.314950] [<c15cf65f>] sysenter_do_call+0x12/0x28 Nov 1 02:52:47 rizzo kernel: [11454.314954] Code: 19 c0 0c 01 8b 75 f8 8b 7d fc 89 ec 5d c3 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 56 66 66 66 66 90 89 c6 89 d0 88 c4 <ac> 38 e0 74 09 84 c0 75 f7 be 01 00 00 00 89 f0 48 5e 5d c3 8d Nov 1 02:52:47 rizzo kernel: [11454.314979] EIP: [<c12d367f>] strchr+0xf/0x30 SS:ESP 0068:ef2e3ea8 Nov 1 02:52:47 rizzo kernel: [11454.314981] CR2: 00000000000000e5 -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
