From: bugzilla-daemon@bugzilla.kernel.org
To: linuxppc-dev@lists.ozlabs.org
Subject: [Bug 205885] New: BUG: KASAN: null-ptr-deref in strncpy+0x3c/0x60
Date: Tue, 17 Dec 2019 00:33:46 +0000 [thread overview]
Message-ID: <bug-205885-206035@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=205885
Bug ID: 205885
Summary: BUG: KASAN: null-ptr-deref in strncpy+0x3c/0x60
Product: Platform Specific/Hardware
Version: 2.5
Kernel Version: 5.5-rc2
Hardware: PPC-32
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: PPC-32
Assignee: platform_ppc-32@kernel-bugs.osdl.org
Reporter: erhard_f@mailbox.org
Regression: No
Created attachment 286331
--> https://bugzilla.kernel.org/attachment.cgi?id=286331&action=edit
screenshot (5.5-rc2, PowerMac G4 DP)
I get this hit at booting kernel 5.5-rc2 on my G4 DP:
[...]
BUG: KASAN: null-ptr-deref in strncpy+0x3c/0x60
Read of size 1 at addr 00000000 by task swapper/0/1
CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 5.5.0-rc2-PowerMacG4
Call Trace:
[ee8edd78] [c07819e0] dump_stack+0xbc/0x118 (unreliable)
[ee8edda8] [c0244b48] __kasan_report+0x174/0x180
[ee8edde8] [c07949dc] strncpy+0x3c/0x60
[ee8ede18] [c0b6979c] mount_block_root+0x200/0x3e0
[ee8edef8] [c0b69b74] prepare_namespace+0x164/0x174
[ee8edf18] [c0005f3c] kernel_init+0x14/0xf0
[ee8edf38] [c001a348] ret_from_kernel_thread+0x14/0x1c
=================================================================
BUG: Kernel NULL pointer dereference on read at 0x0000000
Faulting instruction address: 0xc07949dc
Oops: Kernel access of bad area sig: 11 (#1]
[...]
For details see screenshot (I appled a median filter but tesseract still was
not able to make much text out of it).
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next reply other threads:[~2019-12-17 0:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-17 0:33 bugzilla-daemon [this message]
2019-12-17 0:35 ` [Bug 205885] BUG: KASAN: null-ptr-deref in strncpy+0x3c/0x60 bugzilla-daemon
2019-12-17 5:41 ` bugzilla-daemon
2019-12-17 15:22 ` bugzilla-daemon
2019-12-17 17:49 ` bugzilla-daemon
2019-12-17 17:51 ` [Bug 205885] [Bisected] " bugzilla-daemon
2019-12-17 17:52 ` bugzilla-daemon
2019-12-18 11:07 ` bugzilla-daemon
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