On Mon, 20 Sep 2010 16:18:40 -0700 Andrew Morton wrote: > > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). Hi! Please use the current fbdev mailing list (cc-ed). > On Mon, 20 Sep 2010 22:34:17 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=18912 > > > > Summary: BUG: unable to handle kernel NULL pointer dereference > > at (null) > > Product: IO/Storage > > Version: 2.5 > > Kernel Version: 2.6.35 > > Platform: All > > OS/Version: Linux > > Tree: Mainline > > Status: NEW > > Severity: normal > > Priority: P1 > > Component: Other > > AssignedTo: io_other@xxxxxxxxxxxxxxxxxxxx > > ReportedBy: thomas.creutz@xxxxxx > > Regression: No > > > > > > Created an attachment (id=30872) > > --> (https://bugzilla.kernel.org/attachment.cgi?id=30872) > > full dmesg > > > > at restart with ubuntu mainline kernel from there > > (http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.35.4-maverick/) I get the > > following bug: > > This is a bit strange. We dereferenced a NULL pointer in > __mutex_lock_slowpath(), but where did it come from? fb_release() does > > mutex_lock(&info->lock); > > but for that to be exactly zero, `info' must have been a small negative > number. > > > > [ 43.635104] BUG: unable to handle kernel NULL pointer dereference at (null) > > [ 43.635125] IP: [<ffffffff81576249>] __mutex_lock_slowpath+0xa9/0x170 > > [ 43.635144] PGD 2333cd067 PUD 2333ce067 PMD 0 > > [ 43.635159] Oops: 0002 [#1] SMP > > [ 43.635171] last sysfs file: /sys/devices/platform/f71882fg.2560/temp3_input > > [ 43.635185] CPU 4 > > [ 43.635188] Modules linked in: ipt_LOG ip6t_LOG ip6t_rt ipt_REDIRECT > > xt_multiport xt_recent xt_tcpudp xt_limit nf_conntrack_ipv6 xt_state > > ip6table_filter ip6_tables iptable_mangle iptable_nat nf_nat iptable_filter > > nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables nouveau ttm > > drm_kms_helper drm i7core_edac i2c_algo_bit edac_core f71882fg coretemp raid10 > > raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx > > raid0 multipath linear raid1 r8169 mii ahci libahci > > [ 43.635293] > > [ 43.635297] Pid: 451, comm: plymouthd Not tainted 2.6.35-02063504-generic > > #201008271919 MSI X58 Pro-E (MS-7522)/MS-7522 > > [ 43.635305] RIP: 0010:[<ffffffff81576249>] [<ffffffff81576249>] > > __mutex_lock_slowpath+0xa9/0x170 > > [ 43.635315] RSP: 0018:ffff8802331cbe18 EFLAGS: 00010246 > > [ 43.635321] RAX: ffff8802331cbe28 RBX: ffff88023429000c RCX: > > 00000000ffffffff > > [ 43.635327] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: > > ffff88023429000c > > [ 43.635334] RBP: ffff8802331cbe78 R08: 0000000000000000 R09: > > 0000000000000000 > > [ 43.635340] R10: 00007fff508c4d70 R11: 0000000000000246 R12: > > ffff880234290008 > > [ 43.635346] R13: ffff880232fa8000 R14: ffff880232fa8000 R15: > > ffff880234290010 > > [ 43.635353] FS: 00007f374ac96700(0000) GS:ffff880001e80000(0000) > > knlGS:0000000000000000 > > [ 43.635360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 43.635365] CR2: 0000000000000000 CR3: 00000002331a0000 CR4: > > 00000000000006a0 > > [ 43.635372] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > 0000000000000000 > > [ 43.635378] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > > 0000000000000400 > > [ 43.635385] Process plymouthd (pid: 451, threadinfo ffff8802331ca000, task > > ffff880232fa8000) > > [ 43.635392] Stack: > > [ 43.635395] ffff8802331cbe28 ffffffff815774fe ffff880234290010 > > ffffffff8113e2a6 > > [ 43.635407] <0> ffff880001e8f970 ffffea0007ad5ff0 ffff880231892cf0 > > ffff880234290008 > > [ 43.635420] <0> ffff880234290008 ffff8802342980d0 ffff880226b35c00 > > ffff8802342980d0 > > [ 43.635434] Call Trace: > > [ 43.635440] [<ffffffff815774fe>] ? _raw_spin_lock+0xe/0x20 > > [ 43.635447] [<ffffffff8113e2a6>] ? add_partial+0x56/0x90 > > [ 43.635453] [<ffffffff81575ecb>] mutex_lock+0x2b/0x50 > > [ 43.635460] [<ffffffff812e4839>] fb_release+0x29/0x70 > > [ 43.635467] [<ffffffff81152d63>] __fput+0xf3/0x220 > > [ 43.635472] [<ffffffff81152eac>] fput+0x1c/0x30 > > [ 43.635478] [<ffffffff8114f6bd>] filp_close+0x5d/0x90 > > [ 43.635484] [<ffffffff8115095f>] sys_close+0xaf/0x110 > > [ 43.635492] [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b > > [ 43.635591] Code: 75 07 41 83 7e 20 63 7f b1 49 8d 5c 24 04 4d 8d 7c 24 08 > > 48 89 df e8 b7 12 00 00 49 8b 57 08 48 8d 45 b0 4c 89 7d b0 49 89 47 08 <48> 89 > > 02 48 89 55 b8 ba ff ff ff ff 4c 89 75 c0 89 d0 41 87 04 > > [ 43.635716] RIP [<ffffffff81576249>] __mutex_lock_slowpath+0xa9/0x170 > > [ 43.635724] RSP <ffff8802331cbe18> > > [ 43.635728] CR2: 0000000000000000 > > [ 43.635732] ---[ end trace 977d55bf15636e33 ]--- > > > > > > Kernel is 2.6.35-02063504-generic --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
