| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <6599ad830709171126l7f178404tbb37e916767a3956@mail.gmail.com> Date: Mon, 17 Sep 2007 11:26:51 -0700 From: "Paul Menage" <menage@...gle.com> To: "Paul Jackson" <pj@....com> Cc: akpm@...l.org, linux-kernel@...r.kernel.org Subject: Re: task containersv11 kernel BUG at include/linux/dcache.h:323 This is already fixed in -mm - see task-containersv11-basic-task-container-framework-containers-fix-refcount-bug.patch task-containersv11-add-container_clone-interface-containers-fix-refcount-bug.patch Paul On 9/15/07, Paul Jackson <pj@....com> wrote: > Paul Menage, > > When I run a cpuset creation/destruction stress test I have > against the 2.6.23-rc4-mm1 kernel with the task-containersv11-* > patches, I get an BUG or similar within a couple of seconds, > apparently over some fs lock or count confusions. > > When I add Andrew Morton's (Thanks, Andrew!) very recent patch: > > --- 2.6.23-rc4-mm1.orig/fs/dcache.c 2007-09-14 21:30:19.504902465 -0700 > +++ 2.6.23-rc4-mm1/fs/dcache.c 2007-09-15 09:48:40.306230196 -0700 > @@ -176,6 +176,7 @@ void dput(struct dentry *dentry) > if (!dentry) > return; > > + WARN_ON_ONCE(!atomic_read(&dentry->d_count)); > repeat: > if (atomic_read(&dentry->d_count) == 1) > might_sleep(); > > ... then I get a warning first from the above line, resulting > in the following messages, showing the warning and then the > subsequent BUG: > > Sep 15 21:41:45 margin kernel: WARNING: at fs/dcache.c:179 dput() > Sep 15 21:41:45 margin kernel: > Sep 15 21:41:45 margin kernel: Call Trace: > Sep 15 21:41:45 margin kernel: [<a0000001000139c0>] show_stack+0x40/0xa0 > Sep 15 21:41:45 margin kernel: sp=e00000b05003fbd0 bsp=e00000b050038e20 > Sep 15 21:41:45 margin kernel: [<a000000100013a50>] dump_stack+0x30/0x60 > Sep 15 21:41:45 margin kernel: sp=e00000b05003fda0 bsp=e00000b050038e08 > Sep 15 21:41:45 margin kernel: [<a0000001001a60c0>] dput+0xa0/0x420 > Sep 15 21:41:45 margin kernel: sp=e00000b05003fda0 bsp=e00000b050038dd8 > Sep 15 21:41:45 margin kernel: [<a000000100193f00>] do_rmdir+0x160/0x200 > Sep 15 21:41:45 margin kernel: sp=e00000b05003fda0 bsp=e00000b050038da0 > Sep 15 21:41:45 margin kernel: [<a000000100194070>] sys_rmdir+0x30/0x60 > Sep 15 21:41:45 margin kernel: sp=e00000b05003fe30 bsp=e00000b050038d48 > Sep 15 21:41:45 margin kernel: [<a00000010000af80>] ia64_ret_from_syscall+0x0/0x20 > Sep 15 21:41:45 margin kernel: sp=e00000b05003fe30 bsp=e00000b050038d48 > Sep 15 21:41:45 margin kernel: [<a000000000010620>] __kernel_syscall_via_break+0x0/0x20 > Sep 15 21:41:45 margin kernel: sp=e00000b050040000 bsp=e00000b050038d48 > Sep 15 21:41:46 margin kernel: kernel BUG at include/linux/dcache.h:323! > Sep 15 21:41:46 margin kernel: cpuset_creation[5590]: bugcheck! 0 [1] > Sep 15 21:41:46 margin kernel: Modules linked in: > Sep 15 21:41:46 margin kernel: > Sep 15 21:41:46 margin kernel: Pid: 5590, CPU 0, comm: cpuset_creation > Sep 15 21:41:46 margin kernel: psr : 00001010085a6010 ifs : 800000000000048c ip : [<a000000100193280>] Not tainted > Sep 15 21:41:46 margin kernel: ip is at do_path_lookup+0x480/0x540 > Sep 15 21:41:46 margin kernel: unat: 0000000000000000 pfs : 000000000000048c rsc : 0000000000000003 > Sep 15 21:41:46 margin kernel: rnat: 0000000000000000 bsps: 0000000000000000 pr : 000000000055a959 > Sep 15 21:41:46 margin kernel: ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c0270033f > Sep 15 21:41:46 margin kernel: csd : 0000000000000000 ssd : 0000000000000000 > Sep 15 21:41:46 margin kernel: b0 : a000000100193280 b6 : a000000100093960 b7 : a00000010000f0b0 > Sep 15 21:41:46 margin kernel: f6 : 1003e0000000000000000 f7 : 000000000000000000000 > Sep 15 21:41:46 margin kernel: f8 : 000000000000000000000 f9 : 1003e000000000001c000 > Sep 15 21:41:46 margin kernel: f10 : 1003e0000000000000070 f11 : 1003e0000000000000400 > Sep 15 21:41:46 margin kernel: r1 : a000000101074460 r2 : e000003016fa0ce0 r3 : 0000000000000002 > Sep 15 21:41:46 margin kernel: r8 : 000000000000002d r9 : 0000000000004000 r10 : e000003003105619 > Sep 15 21:41:46 margin kernel: r11 : e000003003110000 r12 : e000003016fa7d80 r13 : e000003016fa0000 > Sep 15 21:41:46 margin kernel: r14 : 0000000000000000 r15 : e000003016fa0cf0 r16 : e000003016fa0d08 > Sep 15 21:41:46 margin kernel: r17 : e00001b008397e18 r18 : 0000000000000001 r19 : e00000300310561b > Sep 15 21:41:46 margin kernel: r20 : 0000000000004000 r21 : 0000000000004000 r22 : e000003003110000 > Sep 15 21:41:46 margin kernel: r23 : ffffffffffff0428 r24 : 0000018110000380 r25 : 0000018000000000 > Sep 15 21:41:46 margin kernel: r26 : e000003016fa0cf0 r27 : e000003016fa0ce0 r28 : e000003016fa0d08 > Sep 15 21:41:46 margin kernel: r29 : 0000000000000001 r30 : 0000000000000002 r31 : 0000000000001060 > Sep 15 21:41:46 margin kernel: > Sep 15 21:41:46 margin kernel: Call Trace: > Sep 15 21:41:46 margin kernel: [<a0000001000139c0>] show_stack+0x40/0xa0 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7950 bsp=e000003016fa10d0 > Sep 15 21:41:47 margin kernel: [<a0000001000142c0>] show_regs+0x840/0x880 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7b20 bsp=e000003016fa1078 > Sep 15 21:41:47 margin kernel: [<a0000001000362a0>] die+0x220/0x300 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7b20 bsp=e000003016fa1030 > Sep 15 21:41:47 margin kernel: [<a0000001000363d0>] die_if_kernel+0x50/0x80 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7b20 bsp=e000003016fa1000 > Sep 15 21:41:47 margin kernel: [<a000000100037af0>] ia64_bad_break+0x230/0x480 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7b20 bsp=e000003016fa0fd0 > Sep 15 21:41:47 margin kernel: [<a00000010000b120>] ia64_leave_kernel+0x0/0x280 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7bb0 bsp=e000003016fa0fd0 > Sep 15 21:41:47 margin kernel: [<a000000100193280>] do_path_lookup+0x480/0x540 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7d80 bsp=e000003016fa0f70 > Sep 15 21:41:47 margin kernel: [<a000000100194ac0>] __path_lookup_intent_open+0x80/0x120 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7d90 bsp=e000003016fa0f18 > Sep 15 21:41:47 margin kernel: [<a000000100194c60>] path_lookup_open+0x40/0x60 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7d90 bsp=e000003016fa0ed8 > Sep 15 21:41:47 margin kernel: [<a000000100194f30>] open_namei+0xb0/0xf80 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7d90 bsp=e000003016fa0e70 > Sep 15 21:41:47 margin kernel: [<a000000100177a10>] do_filp_open+0x50/0xc0 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7da0 bsp=e000003016fa0e38 > Sep 15 21:41:47 margin kernel: [<a000000100177b00>] do_sys_open+0x80/0x1c0 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7e30 bsp=e000003016fa0de0 > Sep 15 21:41:47 margin kernel: [<a000000100177d10>] sys_open+0x50/0x80 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7e30 bsp=e000003016fa0d88 > Sep 15 21:41:47 margin kernel: [<a00000010000af80>] ia64_ret_from_syscall+0x0/0x20 > Sep 15 21:41:47 margin kernel: sp=e000003016fa7e30 bsp=e000003016fa0d88 > Sep 15 21:41:47 margin kernel: [<a000000000010620>] __kernel_syscall_via_break+0x0/0x20 > Sep 15 21:41:47 margin kernel: sp=e000003016fa8000 bsp=e000003016fa0d88 > Sep 15 21:41:47 margin kernel: note: cpuset_creation[5590] exited with preempt_count 1 > > === > > Can you figure out where this is coming from? It is not > in code that I understand all that well, so I am hoping > that I don't have to spend hours poking around in it to > make sense of the problem. > > -- > I won't rest till it's the best ... > Programmer, Linux Scalability > Paul Jackson <pj@....com> 1.650.933.1373 > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists