https://bugzilla.kernel.org/show_bug.cgi?id=96641 Bug ID: 96641 Summary: Oops in __d_lookup when accessing certain files Product: File System Version: 2.5 Kernel Version: 4.0.0 Hardware: ARM OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: fs_ext4@xxxxxxxxxxxxxxxxxxxx Reporter: dannf@xxxxxxxxx Regression: No My filesystem seems to be corrupted, causing random and frequent Oops's when accessing certain regular files. My expectation is that the corrupted filesystem should "crash" when corrupted, but that I should not see an Oops. On one instance, I was able to reproduce everytime I ran: 'ls -l /usr/lib/python2.7/six.pyc' But after a couple boots of different kernels, that file disappeared. Now I'm reproducing using the find command below. I have not tried fscking the filesystem as I don't want to accidentally clear an error state that might be useful for diagnoses. I don't believe this is a new issue - I went back to an earlier kernel (3.13 from Ubuntu - didn't try a mainline 3.13) and the issue persists. dannf@mustang:~/git/linux-2.6$ find . -type f -exec file {} \; > /dev/null [13177.242811] Unable to handle kernel paging request at virtual address 4000008 [13177.250520] pgd = ffffffc3e41c1000 [13177.253933] [40000000000018] *pgd=00000043e82e7003, *pud=00000043e82e7003, *0 [13177.262724] Internal error: Oops: 96000004 [#3] SMP [13177.267576] Modules linked in: xt_conntrack ipt_REJECT nf_reject_ipv4 ebtablt [13177.310290] CPU: 7 PID: 11789 Comm: find Tainted: G D 4.0.0+ #1 [13177.317301] Hardware name: APM X-Gene Mustang board (DT) [13177.322585] task: ffffffc0f9640000 ti: ffffffc3e40b8000 task.ti: ffffffc3e400 [13177.330032] PC is at __d_lookup+0x8c/0x198 [13177.334106] LR is at d_lookup+0x3c/0x64 [13177.337921] pc : [<ffffffc0002283e8>] lr : [<ffffffc000228530>] pstate: 00005 [13177.345276] sp : ffffffc3e40bbba0 [13177.348572] x29: ffffffc3e40bbba0 x28: ffffffc0009bf560 [13177.353875] x27: ffffffffffffffff x26: ffffffc3e40bbcc8 [13177.359179] x25: 0000000000000005 x24: ffffffc3e40bbcb8 [13177.364483] x23: ffffffc3edc04300 x22: ffffffc3edc04300 [13177.369786] x21: 000000006feb2772 x20: 003ffffffffffff8 [13177.375088] x19: 0040000000000000 x18: 0000000000000000 [13177.380391] x17: 00000000004412a0 x16: ffffffc000216cf8 [13177.385694] x15: 0000000000000028 x14: ffffffc0f939f700 [13177.390997] x13: ffffffc0f93ae3c0 x12: 0000000000000000 [13177.396300] x11: ffffffc000791810 x10: ffffffc000791814 [13177.401604] x9 : 0000000000000000 x8 : 0000000000000005 [13177.406905] x7 : 0000000000000005 x6 : 0000000000000005 [13177.412209] x5 : 00000000fffffff7 x4 : 000000000000000a [13177.417512] x3 : 0000000000000020 x2 : 000000000000000b [13177.422816] x1 : 0000000000f6b428 x0 : ffffffc3eec00000 [13177.428119] [13177.429600] Process find (pid: 11789, stack limit = 0xffffffc3e40b8028) [13177.436179] Stack: (0xffffffc3e40bbba0 to 0xffffffc3e40bc000) [13177.441895] bba0: e40bbc00 ffffffc3 00228530 ffffffc0 000004aa 00000000 00b60 [13177.450030] bbc0: e40bbcb8 ffffffc3 edc04300 ffffffc3 ee0b2620 ffffffc3 00000 [13177.458164] bbe0: 009e5c70 ffffffc0 e47a5e80 ffffffc3 f9640440 ffffffc0 009b0 [13177.466299] bc00: e40bbc30 ffffffc3 002285b0 ffffffc0 e40bbcb8 ffffffc3 edc03 [13177.474434] bc20: 00003307 00000000 e47a5e80 ffffffc3 e40bbc50 ffffffc3 00270 [13177.482569] bc40: 00000000 00000000 e40bbcc8 ffffffc3 e40bbce0 ffffffc3 000b0 [13177.490703] bc60: ed0d7080 ffffffc3 e40bbe78 ffffffc3 00003307 00000000 00000 [13177.498837] bc80: 00b4da40 ffffffc0 00b62080 ffffffc0 00c1b1e8 ffffffc0 e8e73 [13177.506972] bca0: f9640440 ffffffc0 e40b8000 ffffffc3 e8e740e8 ffffffc3 6feb5 [13177.515106] bcc0: e40bbcc8 ffffffc3 36303331 ffff0033 ed0d7080 ffffffc3 dc8bf [13177.523241] bce0: e40bbd50 ffffffc3 000b9874 ffffffc0 ed0d7080 ffffffc3 e40b3 [13177.531375] bd00: 00003307 00000000 00000010 00000000 00b62000 ffffffc0 e4223 [13177.539510] bd20: 000003e8 00000000 e8e73f00 ffffffc3 f9640440 ffffffc0 e40b3 [13177.547645] bd40: ed0d7080 ffffffc3 008ef8c8 00000000 e40bbdc0 ffffffc3 000b0 [13177.555780] bd60: ed0d7080 ffffffc3 e40bbe78 ffffffc3 f9640000 ffffffc0 e40b3 [13177.563915] bd80: e40bbea0 ffffffc3 00b62080 ffffffc0 fffffff6 00000000 00000 [13177.572050] bda0: e40bbdc0 ffffffc3 000ba098 ffffffc0 00000000 00000000 00000 [13177.580185] bdc0: e40bbe30 ffffffc3 000bb340 ffffffc0 00000004 00000000 e47a3 [13177.588319] bde0: caf55d54 0000007f 00000000 00000000 00000000 00000000 00000 [13177.596454] be00: 0000011a 00000000 00000104 00000000 00782000 ffffffc0 000b0 [13177.604588] be20: 00000000 00000000 f96404d0 ffffffc0 caf55cd0 0000007f 00080 [13177.612723] be40: 00000000 00000000 00003307 00000000 ffffffff ffffffff b0d6f [13177.620857] be60: 00000000 00000000 00000000 00000000 00800002 ffff81b4 00004 [13177.628991] be80: e47a5e80 ffffffc3 00000000 00000000 caf55d54 0000007f 00000 [13177.637126] bea0: 00000000 00000000 f9640000 ffffffc0 000b8e90 ffffffc0 e4223 [13177.645260] bec0: e422e328 ffffffc3 fffffff6 00000000 00003307 00000000 caf5f [13177.653394] bee0: 00000000 00000000 00000000 00000000 00000000 00000000 b0e0f [13177.661529] bf00: 00000000 00000000 b0e11000 0000007f 00000104 00000000 00000 [13177.669665] bf20: 00000000 00000000 7f7f7f7f 7f7f7f7f 01010101 01010101 00000 [13177.677799] bf40: 00000008 00000000 00000028 00000000 00441410 00000000 b0d6f [13177.685934] bf60: 00000000 00000000 29c243c8 00000000 00003307 00000000 29c20 [13177.694069] bf80: 29c243c0 00000000 00441000 00000000 29c243c8 00000000 29c20 [13177.702205] bfa0: 00000014 00000000 00000000 00000000 00000000 00000000 caf5f [13177.710338] bfc0: 00406a74 00000000 caf55cd0 0000007f b0d69140 0000007f 00000 [13177.718473] bfe0: 00003307 00000000 00000104 00000000 00000000 00000000 00000 [13177.726606] Call trace: [13177.729041] [<ffffffc0002283e8>] __d_lookup+0x8c/0x198 [13177.734151] [<ffffffc00022852c>] d_lookup+0x38/0x64 [13177.739003] [<ffffffc0002285ac>] d_hash_and_lookup+0x54/0x6c [13177.744634] [<ffffffc00027bf44>] proc_flush_task+0x9c/0x198 [13177.750178] [<ffffffc0000b8fb0>] release_task+0x60/0x480 [13177.755462] [<ffffffc0000b9870>] wait_consider_task+0x4a0/0xc04 [13177.761350] [<ffffffc0000ba0d0>] do_wait+0xfc/0x25c [13177.766202] [<ffffffc0000bb33c>] SyS_wait4+0x80/0xf0 [13177.771139] Code: 14000003 f9400273 b4000213 d1002274 (b9402282) [13177.777226] ---[ end trace a64a384267db7dd1 ]--- Segmentation fault -- 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
