From: "Kohli, Gaurav" <gkohli@codeaurora.org>
To: "Arve Hjønnevåg" <arve@android.com>,
"Riley Andrews" <riandrews@android.com>,
devel@driverdev.osuosl.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org
Subject: Query:Regarding object poison overwritten in binder_transaction
Date: Sat, 3 Mar 2018 20:22:35 +0530 [thread overview]
Message-ID: <760538e9-dd50-6cd3-1268-bb535eb363d0@codeaurora.org> (raw)
In-Reply-To: <4d2b6014-ea76-b489-fdde-2e058e2fac4d@codeaurora.org>
HI ,
Is there any known issue of slab poisoning in binder_transaction variable on kernel 4.9,
it seems owner variable of spinlock is
getting corrupted(which is last 8th byte of binder_transaction struct).
368.423462: <2> [<ffffff918ec3177c>] print_trailer+0x13c/0x214
368.428998: <2> [<ffffff918ec3193c>] check_bytes_and_report+0xe8/0xfc
368.435144: <2> [<ffffff918ec31d8c>] check_object+0x248/0x280
368.440592: <2> [<ffffff918ec31f0c>] alloc_debug_processing+0x148/0x1a0
368.446913: <2> [<ffffff918ec333d0>] ___slab_alloc.constprop.72+0x654/0x690
368.453586: <2> [<ffffff918ec33464>] __slab_alloc.isra.68.constprop.71+0x58/0x98
368.460693: <2> [<ffffff918ec338fc>] kmem_cache_alloc_trace+0x198/0x2c4
368.467011: <2> [<ffffff918f7ae24c>] binder_transaction+0xcb8/0x244c
368.473065: <2> [<ffffff918f7b03b8>] binder_thread_write+0x9d8/0x1410
368.479206: <2> [<ffffff918f7b0f20>] binder_ioctl_write_read+0x130/0x370
368.485615: <2> [<ffffff918f7b16b0>] binder_ioctl+0x550/0x7dc
368.491065: <2> [<ffffff918ec5ac0c>] do_vfs_ioctl+0xcc/0x888
368.496424: <2> [<ffffff918ec5b458>] SyS_ioctl+0x90/0xa4
368.501430: <2> [<ffffff918ea83770>] el0_svc_naked+0x24/0x28
368.506798: <6> Kernel panic - not syncing: object poison overwritten
368.287743: <6> Object ffffffc5a0692e20: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
368.297117: <6> Object ffffffc5a0692e30: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
368.306487: <6> Object ffffffc5a0692e40: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
368.315866: <6> Object ffffffc5a0692e50: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
368.325241: <6> Object ffffffc5a0692e60: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
368.334618: <6> Object ffffffc5a0692e70: 6b 6b 6b 6b 6b 6b 6b 6b 67 6b 6b 6b 6b 6b 6b a5 kkkkkkkkgkkkkkk. here it is corrupted(seems write after free case)
368.343997: <6> Redzone ffffffc5a0692e80: bb bb bb bb bb bb bb bb ........
368.352755: <6> Padding ffffffc5a0692fc0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ
368.362215: <6> Padding ffffffc5a0692fd0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ
368.371681: <6> Padding ffffffc5a0692fe0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ
368.381146: <6> Padding ffffffc5a0692ff0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ
Regards
Gaurav
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
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next parent reply other threads:[~2018-03-03 14:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4d2b6014-ea76-b489-fdde-2e058e2fac4d@codeaurora.org>
2018-03-03 14:52 ` Kohli, Gaurav [this message]
2018-03-03 19:27 ` Query:Regarding object poison overwritten in binder_transaction Greg Kroah-Hartman
2018-03-05 11:39 ` Kohli, Gaurav
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