BUG (maybe) with find_get_entry()
Hi, With today's linus/master and with greg/usb-next I keep getting random kernel oops from find_get_entry() (see below): [ 47.700065] Unable to handle kernel paging request at virtual address [ 47.707667] pgd = c0004000 [ 47.710506] [] *pgd=ae7f6821, *pte=, *ppte= [ 47.717135] Internal error: Oops: 17 [#1] SMP ARM [ 47.722047] Modules linked in: g_mass_storage usb_f_mass_storage libcomposite configfs xhci_plat_hcd xhci_hcd snd_soc_davinci_mcasp snd_soc_edma snd_soc_omap snd_soc_evm snd_soc_tlv320aic3x dwc3 snd_soc_core snd_compress omapdrm snd_pcm_dmaengine snd_pcm snd_timer snd fb_sys_fops lis3lv02d_i2c panel_dpi matrix_keypad lis3lv02d dwc3_omap input_polldev soundcore [ 47.755668] CPU: 0 PID: 1440 Comm: file-storage Not tainted 3.17.0-02899-ga7d2165 #229 [ 47.763958] task: ed1b22c0 ti: ed20e000 task.ti: ed20e000 [ 47.769609] PC is at find_get_entry+0x64/0x100 [ 47.774281] LR is at 0xfffa [ 47.777590] pc : [c01065b4]lr : [fffa]psr: a00f0013 [ 47.777590] sp : ed20fc80 ip : fp : ed20fcb4 [ 47.789564] r10: 600f0013 r9 : c014c854 r8 : 0004 [ 47.795031] r7 : ec1909b8 r6 : 0001 r5 : r4 : ec190880 [ 47.801837] r3 : ed20fc6c r2 : r1 : 0004 r0 : [ 47.808640] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 47.816251] Control: 10c5387d Table: ad768059 DAC: 0015 [ 47.822237] Process file-storage (pid: 1440, stack limit = 0xed20e248) [ 47.829034] Stack: (0xed20fc80 to 0xed21) [ 47.833585] fc80: c0106550 ed20fcf8 ec190880 ec1909b4 0004 [ 47.842119] fca0: 0004 ec19090c ed20fcd4 ed20fcb8 c010716c c010655c 00013ef0 ec190880 [ 47.850657] fcc0: 0002 ed20fd4c ed20fcd8 c011df94 c0107150 0006 ed1b22c0 [ 47.859183] fce0: c014c854 600f0013 ed20fd1c ed20fcf8 0002 ed20fd84 00d0 [ 47.867707] fd00: 4000 ec1909b4 0004 c011efd0 c0089b64 c00899dc [ 47.876241] fd20: ec190880 ec190880 0004 ec19090c c014c854 600f0013 [ 47.884761] fd40: ed20fdb4 ed20fd50 c011efd0 c011df08 000200da c014c854 bf2047f8 [ 47.893280] fd60: 0005 ed721e80 ed20fde0 ec1909b4 0002 ed1b22c0 ed20fdcc [ 47.901816] fd80: ed20fdb4 c0089a3c 4000 ed20fe80 ed721e80 ed1b22c0 [ 47.910340] fda0: 4000 ed20fe3c ed20fdb8 c014c854 c011eed4 4000 4000 [ 47.918866] fdc0: ed20fdf4 ec504000 4000 0002 4000 ed20fdc4 0001 [ 47.927387] fde0: ed721e80 ed1b22c0 [ 47.935922] fe00: 4000 4000 ec504000 ed721e80 [ 47.944452] fe20: ec504000 ed20fe80 ed73ec00 4000 ed20fe6c ed20fe40 c014d054 c014c7bc [ 47.952984] fe40: ed20fe6c ed20fe50 ed2769e0 ed2bf104 ed2bf000 ed73ec00 4000 [ 47.961505] fe60: ed20feb4 ed20fe70 bf2b57cc c014cfc8 3732333d ed20e000 4000 [ 47.970032] fe80: 4000 ed2bf000 ed2769c0 ed2bf038 ed2bf000 [ 47.978575] fea0: ed20e038 ed2bf07c ed20ff24 ed20feb8 bf2b6a08 bf2b56b8 0001 c00899dc [ 47.987100] fec0: a00f0013 ed401bd4 00052000 ed20fee0 c0089c50 c0089a70 [ 47.995631] fee0: ed20ff04 ed20fef0 c064f3a4 ed276840 ed2bf000 bf2b6244 ed276840 [ 48.004154] ff00: ed2bf000 bf2b6244 ed20ffac ed20ff28 [ 48.012683] ff20: c0065bdc bf2b6250 c0089c50 ed20ff54 ed2bf000 [ 48.021204] ff40: dead4ead c0a8a238 c08070f8 ed20ff5c [ 48.029735] ff60: ed20ff5c dead4ead c0a8a238 [ 48.038265] ff80: c08070f8 ed20ff88 ed20ff88 ed276840 c0065af8 [ 48.046785] ffa0: ed20ffb0 c000eea8 c0065b04 [ 48.055307] ffc0: [ 48.063837] ffe0: 0013 ebfe e89da830 [ 48.072389] [c01065b4] (find_get_entry) from [c010716c] (find_lock_entry+0x28/0x7c) [ 48.080753] [c010716c] (find_lock_entry) from [c011df94] (shmem_getpage_gfp+0x98/0x7f8) [ 48.089469] [c011df94] (shmem_getpage_gfp) from [c011efd0] (shmem_file_read_iter+0x108/0x3a0) [ 48.098731] [c011efd0] (shmem_file_read_iter) from [c014c854] (new_sync_read+0xa4/0xcc) [ 48.107435] [c014c854] (new_sync_read) from [c014d054] (vfs_read+0x98/0x158) [ 48.115189] [c014d054] (vfs_read) from [bf2b57cc] (do_read+0x120/0x2c8 [usb_f_mass_storage]) [ 48.124382] [bf2b57cc] (do_read [usb_f_mass_storage]) from [bf2b6a08] (fsg_main_thread+0x7c4/0x13f8 [usb_f_mass_storage]) [ 48.136199] [bf2b6a08] (fsg_main_thread [usb_f_mass_storage]) from [c0065bdc] (kthread+0xe4/0x100) [ 48.145919]
Re: BUG (maybe) with find_get_entry()
On Wed, Oct 08, 2014 at 11:57:14AM -0500, Felipe Balbi wrote: Hi, With today's linus/master and with greg/usb-next I keep getting random kernel oops from find_get_entry() (see below): [ 47.700065] Unable to handle kernel paging request at virtual address [ 47.707667] pgd = c0004000 [ 47.710506] [] *pgd=ae7f6821, *pte=, *ppte= [ 47.717135] Internal error: Oops: 17 [#1] SMP ARM [ 47.722047] Modules linked in: g_mass_storage usb_f_mass_storage libcomposite configfs xhci_plat_hcd xhci_hcd snd_soc_davinci_mcasp snd_soc_edma snd_soc_omap snd_soc_evm snd_soc_tlv320aic3x dwc3 snd_soc_core snd_compress omapdrm snd_pcm_dmaengine snd_pcm snd_timer snd fb_sys_fops lis3lv02d_i2c panel_dpi matrix_keypad lis3lv02d dwc3_omap input_polldev soundcore [ 47.755668] CPU: 0 PID: 1440 Comm: file-storage Not tainted 3.17.0-02899-ga7d2165 #229 [ 47.763958] task: ed1b22c0 ti: ed20e000 task.ti: ed20e000 [ 47.769609] PC is at find_get_entry+0x64/0x100 [ 47.774281] LR is at 0xfffa What GCC version are you using? 4.8.1 and 4.8.2 are known to miscompile the ARM kernel and these find_get_entry() crashes with 0x involved smell a lot like the earlier reports from kernels build with those compilers: https://lkml.org/lkml/2014/6/25/456 https://lkml.org/lkml/2014/6/30/375 https://lkml.org/lkml/2014/6/30/660 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854 https://lkml.org/lkml/2014/5/9/330 -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
