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Message-ID: <536C8A75.4080401@huawei.com> Date: Fri, 9 May 2014 15:57:41 +0800 From: Xishi Qiu <qiuxishi@...wei.com> To: Vegard Nossum <vegard.nossum@...cle.com>, Pekka Enberg <penberg@...nel.org>, Peter Zijlstra <peterz@...radead.org>, David Rientjes <rientjes@...gle.com>, Vegard Nossum <vegard.nossum@...il.com> CC: Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>, Xishi Qiu <qiuxishi@...wei.com> Subject: kmemcheck: got WARNING when dynamicly adjust /proc/sys/kernel/kmemcheck to 0/1 OS boot with kmemcheck=0, then set 1, do something, set 0, do something, set 1... then I got the WARNING log. Does kmemcheck support dynamicly adjust? Thanks, Xishi Qiu [ 20.200305] igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX [ 20.208652] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 20.216504] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 22.647385] auditd (3116): /proc/3116/oom_adj is deprecated, please use /proc/3116/oom_score_adj instead. [ 24.845214] BIOS EDD facility v0.16 2004-Jun-25, 1 devices found [ 30.434764] eth0: no IPv6 routers present [ 340.154608] NOHZ: local_softirq_pending 01 [ 340.154639] WARNING: kmemcheck: Caught 64-bit read from uninitialized memory (ffff88083f43a550) [ 340.154644] c000000002000000000000000000000080ff5d0100c9ffff400ed34e0888ffff [ 340.154667] u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u [ 340.154687] ^ [ 340.154690] [ 340.154694] Pid: 3, comm: ksoftirqd/0 Tainted: G C 3.4.24-qiuxishi.19-0.1-default+ #2 Huawei Technologies Co., Ltd. Tecal RH2285 V2-24S/BC11SRSC1 [ 340.154702] RIP: 0010:[<ffffffff81217d72>] [<ffffffff81217d72>] d_namespace_path+0x132/0x270 [ 340.154714] RSP: 0018:ffff8808515a1c88 EFLAGS: 00010202 [ 340.154718] RAX: ffff88083f43a540 RBX: ffff880852e718f3 RCX: 0000000000000001 [ 340.154721] RDX: ffff8808515a1d28 RSI: 0000000000000000 RDI: ffff881053855a60 [ 340.154725] RBP: ffff8808515a1ce8 R08: ffff8808515a1c50 R09: ffff880852e75800 [ 340.154728] R10: 00000000000156f0 R11: 0000000000000000 R12: 0000000000000001 [ 340.154731] R13: 0000000000000100 R14: ffff880852e71510 R15: ffff880852e71800 [ 340.154736] FS: 0000000000000000(0000) GS:ffff88085f600000(0000) knlGS:0000000000000000 [ 340.154740] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 340.154743] CR2: ffff880852e71570 CR3: 00000008513f2000 CR4: 00000000000407f0 [ 340.154746] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 340.154750] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 [ 340.154753] [<ffffffff81217f35>] aa_path_name+0x85/0x180 [ 340.154758] [<ffffffff812187d6>] apparmor_bprm_set_creds+0x126/0x520 [ 340.154763] [<ffffffff811f60ae>] security_bprm_set_creds+0xe/0x10 [ 340.154771] [<ffffffff81170d65>] prepare_binprm+0xa5/0x100 [ 340.154777] [<ffffffff811716c2>] do_execve_common+0x232/0x430 [ 340.154781] [<ffffffff8117194a>] do_execve+0x3a/0x40 [ 340.154785] [<ffffffff8100abb9>] sys_execve+0x49/0x70 [ 340.154793] [<ffffffff814764bc>] stub_execve+0x6c/0xc0 [ 340.154801] [<ffffffffffffffff>] 0xffffffffffffffff [ 340.154813] WARNING: kmemcheck: Caught 64-bit read from uninitialized memory (ffff88083f43a570) [ 340.154817] 746f70000300000078a5433f0888fffff86d433f0888ffff746f700000730000 [ 340.154839] u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u [ 340.154858] ^ [ 340.154861] [ 340.154864] Pid: 3, comm: ksoftirqd/0 Tainted: G C 3.4.24-qiuxishi.19-0.1-default+ #2 Huawei Technologies Co., Ltd. Tecal RH2285 V2-24S/BC11SRSC1 [ 340.154871] RIP: 0010:[<ffffffff811691f4>] [<ffffffff811691f4>] rw_verify_area+0x24/0x100 [ 340.154880] RSP: 0018:ffff8808515a1dc8 EFLAGS: 00010202 [ 340.154883] RAX: ffff88083f43a540 RBX: 0000000000000080 RCX: 0000000000000080 [ 340.154887] RDX: ffff8808515a1e30 RSI: ffff880852e71500 RDI: 0000000000000000 [ 340.154890] RBP: ffff8808515a1de8 R08: ffff880852e73200 R09: ffff88085f004900 [ 340.154894] R10: ffff880852e72600 R11: 0000000000000000 R12: ffff880852e71500 [ 340.154897] R13: 0000000000000000 R14: ffff880852e73200 R15: 0000000000000001 [ 340.154901] FS: 0000000000000000(0000) GS:ffff88085f600000(0000) knlGS:0000000000000000 [ 340.154905] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 340.154908] CR2: ffff880852e71570 CR3: 00000008513f2000 CR4: 00000000000407f0 [ 340.154911] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 340.154914] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 [ 340.154917] [<ffffffff811698f4>] vfs_read+0xa4/0x130 [ 340.154922] [<ffffffff81170ca4>] kernel_read+0x44/0x60 [ 340.154926] [<ffffffff81170d90>] prepare_binprm+0xd0/0x100 [ 340.154931] [<ffffffff811716c2>] do_execve_common+0x232/0x430 [ 340.154935] [<ffffffff8117194a>] do_execve+0x3a/0x40 [ 340.154939] [<ffffffff8100abb9>] sys_execve+0x49/0x70 [ 340.154944] [<ffffffff814764bc>] stub_execve+0x6c/0xc0 [ 340.154950] [<ffffffffffffffff>] 0xffffffffffffffff [ 340.154955] WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (ffff88083f43a540) [ 340.154959] c000000002000000000000000000000080ff5d0100c9ffff400ed34e0888ffff [ 340.154981] u u u u u u u u u u u u u u u u i i i i i i i i u u u u u u u u [ 340.155000] ^ -- 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/
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