* [PATCH] ACPICA: Always create namespace nodes using acpi_ns_create_node()
@ 2021-03-23 21:20 Erik Kaneda
2021-03-24 13:54 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Erik Kaneda @ 2021-03-23 21:20 UTC (permalink / raw)
To: Vegard Nossum, Rafael J . Wysocki, ACPI Devel Maling List
Cc: Vlastimil Babka, Kees Cook, Jan Kiszka, Bob Moore, Erik Kaneda
From: Vegard Nossum <vegard.nossum@oracle.com>
ACPICA commit 29da9a2a3f5b2c60420893e5c6309a0586d7a329
ACPI is allocating an object using kmalloc(), but then frees it
using kmem_cache_free(<"Acpi-Namespace" kmem_cache>).
This is wrong and can lead to boot failures manifesting like this:
hpet0: 3 comparators, 64-bit 100.000000 MHz counter
clocksource: Switched to clocksource tsc-early
BUG: unable to handle page fault for address: 000000003ffe0018
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.6.0+ #211
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Ubuntu-1.8.2-1ubuntu1 04/01/2014
RIP: 0010:kmem_cache_alloc+0x70/0x1d0
Code: 00 00 4c 8b 45 00 65 49 8b 50 08 65 4c 03 05 6f cc e7 7e 4d 8b
20 4d 85 e4 0f 84 3d 01 00 00 8b 45 20 48 8b 7d 00 48 8d 4a 01 <49> 8b
1c 04 4c 89 e0 65 48 0f c7 0f 0f 94 c0 84 c0 74 c5 8b 45 20
RSP: 0000:ffffc90000013df8 EFLAGS: 00010206
RAX: 0000000000000018 RBX: ffffffff81c49200 RCX: 0000000000000002
RDX: 0000000000000001 RSI: 0000000000000dc0 RDI: 000000000002b300
RBP: ffff88803e403d00 R08: ffff88803ec2b300 R09: 0000000000000001
R10: 0000000000000dc0 R11: 0000000000000006 R12: 000000003ffe0000
R13: ffffffff8110a583 R14: 0000000000000dc0 R15: ffffffff81c49a80
FS: 0000000000000000(0000) GS:ffff88803ec00000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000003ffe0018 CR3: 0000000001c0a001 CR4: 00000000003606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__trace_define_field+0x33/0xa0
event_trace_init+0xeb/0x2b4
tracer_init_tracefs+0x60/0x195
? register_tracer+0x1e7/0x1e7
do_one_initcall+0x74/0x160
kernel_init_freeable+0x190/0x1f0
? rest_init+0x9a/0x9a
kernel_init+0x5/0xf6
ret_from_fork+0x35/0x40
CR2: 000000003ffe0018
---[ end trace 707efa023f2ee960 ]---
RIP: 0010:kmem_cache_alloc+0x70/0x1d0
Bisection leads to unrelated changes in slab; Vlastimil Babka
suggests an unrelated layout or slab merge change merely exposed
the underlying bug.
Link:
https://lore.kernel.org/lkml/4dc93ff8-f86e-f4c9-ebeb-6d3153a78d03@oracle.com/
Link:
https://lore.kernel.org/r/a1461e21-c744-767d-6dfc-6641fd3e3ce2@siemens.com
Debugged-by: Vlastimil Babka <vbabka@suse.cz>
Debugged-by: Kees Cook <keescook@chromium.org>
Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
Fixes: f79c8e4136eac37255ead8875593ae33a2c16d20 ("ACPICA: Namespace:
simplify creation of the initial/default namespace")
Link: https://github.com/acpica/acpica/commit/29da9a2a
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
---
drivers/acpi/acpica/nsaccess.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/acpi/acpica/nsaccess.c b/drivers/acpi/acpica/nsaccess.c
index 3f045b5953b2..a0c1a665dfc1 100644
--- a/drivers/acpi/acpica/nsaccess.c
+++ b/drivers/acpi/acpica/nsaccess.c
@@ -99,13 +99,12 @@ acpi_status acpi_ns_root_initialize(void)
* just create and link the new node(s) here.
*/
new_node =
- ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_namespace_node));
+ acpi_ns_create_node(*ACPI_CAST_PTR(u32, init_val->name));
if (!new_node) {
status = AE_NO_MEMORY;
goto unlock_and_exit;
}
- ACPI_COPY_NAMESEG(new_node->name.ascii, init_val->name);
new_node->descriptor_type = ACPI_DESC_TYPE_NAMED;
new_node->type = init_val->type;
--
2.29.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ACPICA: Always create namespace nodes using acpi_ns_create_node()
2021-03-23 21:20 [PATCH] ACPICA: Always create namespace nodes using acpi_ns_create_node() Erik Kaneda
@ 2021-03-24 13:54 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2021-03-24 13:54 UTC (permalink / raw)
To: Erik Kaneda
Cc: Vegard Nossum, Rafael J . Wysocki, ACPI Devel Maling List,
Vlastimil Babka, Kees Cook, Jan Kiszka, Bob Moore
On Tue, Mar 23, 2021 at 10:52 PM Erik Kaneda <erik.kaneda@intel.com> wrote:
>
> From: Vegard Nossum <vegard.nossum@oracle.com>
>
> ACPICA commit 29da9a2a3f5b2c60420893e5c6309a0586d7a329
>
> ACPI is allocating an object using kmalloc(), but then frees it
> using kmem_cache_free(<"Acpi-Namespace" kmem_cache>).
>
> This is wrong and can lead to boot failures manifesting like this:
>
> hpet0: 3 comparators, 64-bit 100.000000 MHz counter
> clocksource: Switched to clocksource tsc-early
> BUG: unable to handle page fault for address: 000000003ffe0018
> #PF: supervisor read access in kernel mode
> #PF: error_code(0x0000) - not-present page
> PGD 0 P4D 0
> Oops: 0000 [#1] SMP PTI
> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.6.0+ #211
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
> Ubuntu-1.8.2-1ubuntu1 04/01/2014
> RIP: 0010:kmem_cache_alloc+0x70/0x1d0
> Code: 00 00 4c 8b 45 00 65 49 8b 50 08 65 4c 03 05 6f cc e7 7e 4d 8b
> 20 4d 85 e4 0f 84 3d 01 00 00 8b 45 20 48 8b 7d 00 48 8d 4a 01 <49> 8b
> 1c 04 4c 89 e0 65 48 0f c7 0f 0f 94 c0 84 c0 74 c5 8b 45 20
> RSP: 0000:ffffc90000013df8 EFLAGS: 00010206
> RAX: 0000000000000018 RBX: ffffffff81c49200 RCX: 0000000000000002
> RDX: 0000000000000001 RSI: 0000000000000dc0 RDI: 000000000002b300
> RBP: ffff88803e403d00 R08: ffff88803ec2b300 R09: 0000000000000001
> R10: 0000000000000dc0 R11: 0000000000000006 R12: 000000003ffe0000
> R13: ffffffff8110a583 R14: 0000000000000dc0 R15: ffffffff81c49a80
> FS: 0000000000000000(0000) GS:ffff88803ec00000(0000)
> knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000003ffe0018 CR3: 0000000001c0a001 CR4: 00000000003606f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> __trace_define_field+0x33/0xa0
> event_trace_init+0xeb/0x2b4
> tracer_init_tracefs+0x60/0x195
> ? register_tracer+0x1e7/0x1e7
> do_one_initcall+0x74/0x160
> kernel_init_freeable+0x190/0x1f0
> ? rest_init+0x9a/0x9a
> kernel_init+0x5/0xf6
> ret_from_fork+0x35/0x40
> CR2: 000000003ffe0018
> ---[ end trace 707efa023f2ee960 ]---
> RIP: 0010:kmem_cache_alloc+0x70/0x1d0
>
> Bisection leads to unrelated changes in slab; Vlastimil Babka
> suggests an unrelated layout or slab merge change merely exposed
> the underlying bug.
>
> Link:
> https://lore.kernel.org/lkml/4dc93ff8-f86e-f4c9-ebeb-6d3153a78d03@oracle.com/
> Link:
> https://lore.kernel.org/r/a1461e21-c744-767d-6dfc-6641fd3e3ce2@siemens.com
> Debugged-by: Vlastimil Babka <vbabka@suse.cz>
> Debugged-by: Kees Cook <keescook@chromium.org>
> Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
> Fixes: f79c8e4136eac37255ead8875593ae33a2c16d20 ("ACPICA: Namespace:
> simplify creation of the initial/default namespace")
>
> Link: https://github.com/acpica/acpica/commit/29da9a2a
> Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
> Signed-off-by: Bob Moore <robert.moore@intel.com>
> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
> ---
> drivers/acpi/acpica/nsaccess.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/acpica/nsaccess.c b/drivers/acpi/acpica/nsaccess.c
> index 3f045b5953b2..a0c1a665dfc1 100644
> --- a/drivers/acpi/acpica/nsaccess.c
> +++ b/drivers/acpi/acpica/nsaccess.c
> @@ -99,13 +99,12 @@ acpi_status acpi_ns_root_initialize(void)
> * just create and link the new node(s) here.
> */
> new_node =
> - ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_namespace_node));
> + acpi_ns_create_node(*ACPI_CAST_PTR(u32, init_val->name));
> if (!new_node) {
> status = AE_NO_MEMORY;
> goto unlock_and_exit;
> }
>
> - ACPI_COPY_NAMESEG(new_node->name.ascii, init_val->name);
> new_node->descriptor_type = ACPI_DESC_TYPE_NAMED;
> new_node->type = init_val->type;
>
> --
Applied as 5.12-rc material, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-03-23 21:20 [PATCH] ACPICA: Always create namespace nodes using acpi_ns_create_node() Erik Kaneda
2021-03-24 13:54 ` Rafael J. Wysocki
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