From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Vasily Gorbik <gor@linux.ibm.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.4 26/35] kallsyms: exclude kasan local symbols on s390
Date: Fri, 19 Jul 2019 00:14:14 -0400 [thread overview]
Message-ID: <20190719041423.19322-26-sashal@kernel.org> (raw)
In-Reply-To: <20190719041423.19322-1-sashal@kernel.org>
From: Vasily Gorbik <gor@linux.ibm.com>
[ Upstream commit 33177f01ca3fe550146bb9001bec2fd806b2f40c ]
gcc asan instrumentation emits the following sequence to store frame pc
when the kernel is built with CONFIG_RELOCATABLE:
debug/vsprintf.s:
.section .data.rel.ro.local,"aw"
.align 8
.LC3:
.quad .LASANPC4826@GOTOFF
.text
.align 8
.type number, @function
number:
.LASANPC4826:
and in case reloc is issued for LASANPC label it also gets into .symtab
with the same address as actual function symbol:
$ nm -n vmlinux | grep 0000000001397150
0000000001397150 t .LASANPC4826
0000000001397150 t number
In the end kernel backtraces are almost unreadable:
[ 143.748476] Call Trace:
[ 143.748484] ([<000000002da3e62c>] .LASANPC2671+0x114/0x190)
[ 143.748492] [<000000002eca1a58>] .LASANPC2612+0x110/0x160
[ 143.748502] [<000000002de9d830>] print_address_description+0x80/0x3b0
[ 143.748511] [<000000002de9dd64>] __kasan_report+0x15c/0x1c8
[ 143.748521] [<000000002ecb56d4>] strrchr+0x34/0x60
[ 143.748534] [<000003ff800a9a40>] kasan_strings+0xb0/0x148 [test_kasan]
[ 143.748547] [<000003ff800a9bba>] kmalloc_tests_init+0xe2/0x528 [test_kasan]
[ 143.748555] [<000000002da2117c>] .LASANPC4069+0x354/0x748
[ 143.748563] [<000000002dbfbb16>] do_init_module+0x136/0x3b0
[ 143.748571] [<000000002dbff3f4>] .LASANPC3191+0x2164/0x25d0
[ 143.748580] [<000000002dbffc4c>] .LASANPC3196+0x184/0x1b8
[ 143.748587] [<000000002ecdf2ec>] system_call+0xd8/0x2d8
Since LASANPC labels are not even unique and get into .symtab only due
to relocs filter them out in kallsyms.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
scripts/kallsyms.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 8fa81e84e295..d117c68d1607 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -158,6 +158,9 @@ static int read_symbol(FILE *in, struct sym_entry *s)
/* exclude debugging symbols */
else if (stype == 'N')
return -1;
+ /* exclude s390 kasan local symbols */
+ else if (!strncmp(sym, ".LASANPC", 8))
+ return -1;
/* include the type field in the symbol name, so that it gets
* compressed together */
--
2.20.1
next prev parent reply other threads:[~2019-07-19 4:16 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 4:13 [PATCH AUTOSEL 4.4 01/35] drm/panel: simple: Fix panel_simple_dsi_probe Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 02/35] usb: core: hub: Disable hub-initiated U1/U2 Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 03/35] tty: max310x: Fix invalid baudrate divisors calculator Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 04/35] pinctrl: rockchip: fix leaked of_node references Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 05/35] tty: serial: cpm_uart - fix init when SMC is relocated Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 06/35] drm/edid: Fix a missing-check bug in drm_load_edid_firmware() Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 07/35] memstick: Fix error cleanup path of memstick_init Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 08/35] tty/serial: digicolor: Fix digicolor-usart already registered warning Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 09/35] tty: serial: msm_serial: avoid system lockup condition Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 10/35] drm/virtio: Add memory barriers for capset cache Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.4 11/35] phy: renesas: rcar-gen2: Fix memory leak at error paths Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 12/35] powerpc/pseries/mobility: prevent cpu hotplug during DT update Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 13/35] powerpc/pseries/mobility: rebuild cacheinfo hierarchy post-migration Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 14/35] usb: gadget: Zero ffs_io_data Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 15/35] powerpc/pci/of: Fix OF flags parsing for 64bit BARs Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 16/35] PCI: sysfs: Ignore lockdep for remove attribute Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 17/35] iio: st_accel: fix iio_triggered_buffer_{pre,post}enable positions Sasha Levin
2019-07-21 17:23 ` Jonathan Cameron
2019-07-22 6:47 ` Ardelean, Alexandru
2019-07-28 15:43 ` Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 18/35] iio: iio-utils: Fix possible incorrect mask calculation Sasha Levin
2019-07-21 17:27 ` Jonathan Cameron
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 19/35] recordmcount: Fix spurious mcount entries on powerpc Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 20/35] mfd: core: Set fwnode for created devices Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 21/35] mfd: arizona: Fix undefined behavior Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 22/35] um: Silence lockdep complaint about mmap_sem Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 23/35] powerpc/4xx/uic: clear pending interrupt after irq type/pol change Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 24/35] serial: sh-sci: Fix TX DMA buffer flushing and workqueue races Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 25/35] PCI: tegra: Enable Relaxed Ordering only for Tegra20 & Tegra30 Sasha Levin
2019-07-19 4:14 ` Sasha Levin [this message]
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 27/35] perf test mmap-thread-lookup: Initialize variable to suppress memory sanitizer warning Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 28/35] f2fs: avoid out-of-range memory access Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 29/35] mailbox: handle failed named mailbox channel request Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 30/35] powerpc/eeh: Handle hugepages in ioremap space Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 31/35] sh: prevent warnings when using iounmap Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 32/35] mm/kmemleak.c: fix check for softirq context Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 33/35] 9p: pass the correct prototype to read_cache_page Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 34/35] mm/mmu_notifier: use hlist_add_head_rcu() Sasha Levin
2019-07-19 4:14 ` [PATCH AUTOSEL 4.4 35/35] locking/lockdep: Fix lock used or unused stats error Sasha Levin
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