From: Miroslav Benes <mbenes@suse.cz>
To: Joe Lawrence <joe.lawrence@redhat.com>
Cc: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
linux-kbuild@vger.kernel.org
Subject: Re: [PATCH v4 00/10] klp-convert livepatch build tooling
Date: Thu, 13 Jun 2019 15:00:19 +0200 (CEST) [thread overview]
Message-ID: <alpine.LSU.2.21.1906131451560.22698@pobox.suse.cz> (raw)
In-Reply-To: <20190509143859.9050-1-joe.lawrence@redhat.com>
Hi Joe,
first, I'm sorry for the lack of response so far.
Maybe you've already noticed but the selftests fail. Well, at least in
my VM. When test_klp_convert1.ko is loaded, the process is killed with
[ 518.041826] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 518.042816] #PF: supervisor read access in kernel mode
[ 518.043393] #PF: error_code(0x0000) - not-present page
[ 518.043981] PGD 0 P4D 0
[ 518.044185] Oops: 0000 [#1] SMP PTI
[ 518.044518] CPU: 2 PID: 2255 Comm: insmod Tainted: G O K 5.1.0-klp_convert_v4-193435-g67748576637e #2
[ 518.045784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-prebuilt.qemu.org 04/01/2014
[ 518.046940] RIP: 0010:test_klp_convert_init+0x1c/0x40 [test_klp_convert1]
[ 518.047611] Code: 1b a0 48 89 c6 e9 a8 c0 f4 e0 0f 1f 40 00 0f 1f 44 00 00 53 48 c7 c7 00 30 1b a0 e8 5e 33 f6 e0 85 c0 89 c3 74 04 89 d8 5b c3 <48> 8b 35 5d ef e4 5f 48 c7 c7 28 20 1b a0 e8 75 c0 f4 e0 e8 6c ff
[ 518.049779] RSP: 0018:ffffc90000f37cc8 EFLAGS: 00010246
[ 518.050243] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000027de0
[ 518.050922] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff88807ab54f40
[ 518.051619] RBP: ffffffffa01b1080 R08: 0000000096efde7a R09: 0000000000000001
[ 518.052332] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
[ 518.053012] R13: 0000000000000000 R14: ffff888078b55000 R15: ffffc90000f37ea0
[ 518.053714] FS: 00007febece1fb80(0000) GS:ffff88807d400000(0000) knlGS:0000000000000000
[ 518.054514] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 518.055078] CR2: 0000000000000000 CR3: 000000007a56a000 CR4: 00000000000006e0
[ 518.055818] Call Trace:
[ 518.056007] do_one_initcall+0x6a/0x2da
[ 518.056340] ? do_init_module+0x22/0x230
[ 518.056702] ? rcu_read_lock_sched_held+0x96/0xa0
[ 518.057125] ? kmem_cache_alloc_trace+0x284/0x2e0
[ 518.057493] do_init_module+0x5a/0x230
[ 518.057900] load_module+0x17bc/0x1f50
[ 518.058214] ? __symbol_put+0x40/0x40
[ 518.058499] ? vfs_read+0x12d/0x160
[ 518.058766] __do_sys_finit_module+0x83/0xc0
[ 518.059122] do_syscall_64+0x57/0x190
[ 518.059407] entry_SYSCALL_64_after_hwframe+0x49/0xbe
...
It crashes right in test_klp_convert_init() when print_*() using
supposed-to-be-converted symbols are called. I'll debug it next week. Can
you reproduce it too?
Regards,
Miroslav
PS: it is probably not a coincidence that I come across selftests failures
right before I leave for a holiday...
next prev parent reply other threads:[~2019-06-13 15:19 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-09 14:38 [PATCH v4 00/10] klp-convert livepatch build tooling Joe Lawrence
2019-05-09 14:38 ` [PATCH v4 01/10] livepatch: Create and include UAPI headers Joe Lawrence
2019-05-09 14:38 ` [PATCH v4 02/10] kbuild: Support for Symbols.list creation Joe Lawrence
2019-05-21 13:48 ` Masahiro Yamada
2019-05-09 14:38 ` [PATCH v4 03/10] livepatch: Add klp-convert tool Joe Lawrence
2019-07-31 2:50 ` Masahiro Yamada
2019-07-31 3:36 ` Masahiro Yamada
2019-08-09 18:42 ` Joe Lawrence
2019-08-13 1:15 ` Masahiro Yamada
2019-05-09 14:38 ` [PATCH v4 04/10] livepatch: Add klp-convert annotation helpers Joe Lawrence
2019-05-09 14:38 ` [PATCH v4 05/10] modpost: Integrate klp-convert Joe Lawrence
2019-05-09 14:38 ` [PATCH v4 06/10] modpost: Add modinfo flag to livepatch modules Joe Lawrence
2019-07-31 5:58 ` Masahiro Yamada
2019-08-12 15:56 ` Joe Lawrence
2019-08-15 15:05 ` Masahiro Yamada
2019-08-16 8:19 ` Miroslav Benes
2019-08-16 12:43 ` Joe Lawrence
2019-08-16 19:01 ` Joe Lawrence
2019-08-19 3:50 ` Masahiro Yamada
2019-08-19 15:55 ` Joe Lawrence
2019-08-20 7:54 ` Miroslav Benes
2019-08-19 3:49 ` Masahiro Yamada
2019-08-19 7:31 ` Miroslav Benes
2019-08-19 16:02 ` Joe Lawrence
2019-08-22 3:35 ` Masahiro Yamada
2019-08-13 10:26 ` Miroslav Benes
2019-05-09 14:38 ` [PATCH v4 07/10] livepatch: Add sample livepatch module Joe Lawrence
2019-08-16 11:35 ` Masahiro Yamada
2019-08-16 12:47 ` Joe Lawrence
2019-05-09 14:38 ` [PATCH v4 08/10] documentation: Update on livepatch elf format Joe Lawrence
2019-05-09 14:38 ` [PATCH v4 09/10] livepatch/selftests: add klp-convert Joe Lawrence
2019-05-09 14:38 ` [PATCH v4 10/10] livepatch/klp-convert: abort on special sections Joe Lawrence
2019-06-13 13:00 ` Miroslav Benes [this message]
2019-06-13 13:15 ` [PATCH v4 00/10] klp-convert livepatch build tooling Joe Lawrence
2019-06-13 20:48 ` Joe Lawrence
2019-06-14 8:34 ` Petr Mladek
2019-06-14 14:20 ` Joe Lawrence
2019-06-14 16:36 ` Libor Pechacek
2019-06-25 11:36 ` Miroslav Benes
2019-06-25 13:24 ` Joe Lawrence
2019-06-25 19:08 ` Joe Lawrence
2019-06-26 10:27 ` Miroslav Benes
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