linux-stable.git/drivers/ata, branch v4.19.321

ata: libata-core: Fix null pointer dereference on error

2024-09-04T11:13:07+00:00

commit 5d92c7c566dc76d96e0e19e481d926bbe6631c1e upstream.

If the ata_port_alloc() call in ata_host_alloc() fails,
ata_host_release() will get called.

However, the code in ata_host_release() tries to free ata_port struct
members unconditionally, which can lead to the following:

BUG: unable to handle page fault for address: 0000000000003990
PGD 0 P4D 0
Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 10 PID: 594 Comm: (udev-worker) Not tainted 6.10.0-rc5 #44
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014
RIP: 0010:ata_host_release.cold+0x2f/0x6e [libata]
Code: e4 4d 63 f4 44 89 e2 48 c7 c6 90 ad 32 c0 48 c7 c7 d0 70 33 c0 49 83 c6 0e 41
RSP: 0018:ffffc90000ebb968 EFLAGS: 00010246
RAX: 0000000000000041 RBX: ffff88810fb52e78 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88813b3218c0 RDI: ffff88813b3218c0
RBP: ffff88810fb52e40 R08: 0000000000000000 R09: 6c65725f74736f68
R10: ffffc90000ebb738 R11: 73692033203a746e R12: 0000000000000004
R13: 0000000000000000 R14: 0000000000000011 R15: 0000000000000006
FS:  00007f6cc55b9980(0000) GS:ffff88813b300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000003990 CR3: 00000001122a2000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 
 ? __die_body.cold+0x19/0x27
 ? page_fault_oops+0x15a/0x2f0
 ? exc_page_fault+0x7e/0x180
 ? asm_exc_page_fault+0x26/0x30
 ? ata_host_release.cold+0x2f/0x6e [libata]
 ? ata_host_release.cold+0x2f/0x6e [libata]
 release_nodes+0x35/0xb0
 devres_release_group+0x113/0x140
 ata_host_alloc+0xed/0x120 [libata]
 ata_host_alloc_pinfo+0x14/0xa0 [libata]
 ahci_init_one+0x6c9/0xd20 [ahci]

Do not access ata_port struct members unconditionally.

Fixes: 633273a3ed1c ("libata-pmp: hook PMP support and enable it")
Cc: stable@vger.kernel.org
Reviewed-by: Damien Le Moal 
Reviewed-by: Hannes Reinecke 
Reviewed-by: John Garry 
Link: https://lore.kernel.org/r/20240629124210.181537-7-cassel@kernel.org
Signed-off-by: Niklas Cassel 
Signed-off-by: Oleksandr Tymoshenko 
Signed-off-by: Greg Kroah-Hartman

ata: libata-core: Fix double free on error

2024-07-05T07:00:35+00:00

commit ab9e0c529eb7cafebdd31fe1644524e80a48b05d upstream.

If e.g. the ata_port_alloc() call in ata_host_alloc() fails, we will jump
to the err_out label, which will call devres_release_group().
devres_release_group() will trigger a call to ata_host_release().
ata_host_release() calls kfree(host), so executing the kfree(host) in
ata_host_alloc() will lead to a double free:

kernel BUG at mm/slub.c:553!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
CPU: 11 PID: 599 Comm: (udev-worker) Not tainted 6.10.0-rc5 #47
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014
RIP: 0010:kfree+0x2cf/0x2f0
Code: 5d 41 5e 41 5f 5d e9 80 d6 ff ff 4d 89 f1 41 b8 01 00 00 00 48 89 d9 48 89 da
RSP: 0018:ffffc90000f377f0 EFLAGS: 00010246
RAX: ffff888112b1f2c0 RBX: ffff888112b1f2c0 RCX: ffff888112b1f320
RDX: 000000000000400b RSI: ffffffffc02c9de5 RDI: ffff888112b1f2c0
RBP: ffffc90000f37830 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90000f37610 R11: 617461203a736b6e R12: ffffea00044ac780
R13: ffff888100046400 R14: ffffffffc02c9de5 R15: 0000000000000006
FS:  00007f2f1cabe980(0000) GS:ffff88813b380000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f1c3acf75 CR3: 0000000111724000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 
 ? __die_body.cold+0x19/0x27
 ? die+0x2e/0x50
 ? do_trap+0xca/0x110
 ? do_error_trap+0x6a/0x90
 ? kfree+0x2cf/0x2f0
 ? exc_invalid_op+0x50/0x70
 ? kfree+0x2cf/0x2f0
 ? asm_exc_invalid_op+0x1a/0x20
 ? ata_host_alloc+0xf5/0x120 [libata]
 ? ata_host_alloc+0xf5/0x120 [libata]
 ? kfree+0x2cf/0x2f0
 ata_host_alloc+0xf5/0x120 [libata]
 ata_host_alloc_pinfo+0x14/0xa0 [libata]
 ahci_init_one+0x6c9/0xd20 [ahci]

Ensure that we will not call kfree(host) twice, by performing the kfree()
only if the devres_open_group() call failed.

Fixes: dafd6c496381 ("libata: ensure host is free'd on error exit paths")
Cc: stable@vger.kernel.org
Reviewed-by: Damien Le Moal 
Reviewed-by: Hannes Reinecke 
Link: https://lore.kernel.org/r/20240629124210.181537-9-cassel@kernel.org
Signed-off-by: Niklas Cassel 
Signed-off-by: Greg Kroah-Hartman

ata: pata_legacy: make legacy_exit() work again

2024-06-16T11:23:38+00:00

commit d4a89339f17c87c4990070e9116462d16e75894f upstream.

Commit defc9cd826e4 ("pata_legacy: resychronize with upstream changes and
resubmit") missed to update legacy_exit(), so that it now fails to do any
cleanup -- the loop body there can never be entered.  Fix that and finally
remove now useless nr_legacy_host variable...

Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.

Fixes: defc9cd826e4 ("pata_legacy: resychronize with upstream changes and resubmit")
Cc: stable@vger.kernel.org
Signed-off-by: Sergey Shtylyov 
Reviewed-by: Niklas Cassel 
Signed-off-by: Damien Le Moal 
Signed-off-by: Greg Kroah-Hartman

ata: sata_gemini: Check clk_enable() result

2024-05-17T09:42:39+00:00

[ Upstream commit e85006ae7430aef780cc4f0849692e266a102ec0 ]

The call to clk_enable() in gemini_sata_start_bridge() can fail.
Add a check to detect such failure.

Signed-off-by: Chen Ni 
Signed-off-by: Damien Le Moal 
Signed-off-by: Sasha Levin

ata: sata_mv: Fix PCI device ID table declaration compilation warning

2024-04-13T10:50:14+00:00

[ Upstream commit 3137b83a90646917c90951d66489db466b4ae106 ]

Building with W=1 shows a warning for an unused variable when CONFIG_PCI
is diabled:

drivers/ata/sata_mv.c:790:35: error: unused variable 'mv_pci_tbl' [-Werror,-Wunused-const-variable]
static const struct pci_device_id mv_pci_tbl[] = {

Move the table into the same block that containsn the pci_driver
definition.

Fixes: 7bb3c5290ca0 ("sata_mv: Remove PCI dependency")
Signed-off-by: Arnd Bergmann 
Signed-off-by: Damien Le Moal 
Signed-off-by: Sasha Levin

ata: sata_sx4: fix pdc20621_get_from_dimm() on 64-bit

2024-04-13T10:50:14+00:00

[ Upstream commit 52f80bb181a9a1530ade30bc18991900bbb9697f ]

gcc warns about a memcpy() with overlapping pointers because of an
incorrect size calculation:

In file included from include/linux/string.h:369,
                 from drivers/ata/sata_sx4.c:66:
In function 'memcpy_fromio',
    inlined from 'pdc20621_get_from_dimm.constprop' at drivers/ata/sata_sx4.c:962:2:
include/linux/fortify-string.h:97:33: error: '__builtin_memcpy' accessing 4294934464 bytes at offsets 0 and [16, 16400] overlaps 6442385281 bytes at offset -2147450817 [-Werror=restrict]
   97 | #define __underlying_memcpy     __builtin_memcpy
      |                                 ^
include/linux/fortify-string.h:620:9: note: in expansion of macro '__underlying_memcpy'
  620 |         __underlying_##op(p, q, __fortify_size);                        \
      |         ^~~~~~~~~~~~~
include/linux/fortify-string.h:665:26: note: in expansion of macro '__fortify_memcpy_chk'
  665 | #define memcpy(p, q, s)  __fortify_memcpy_chk(p, q, s,                  \
      |                          ^~~~~~~~~~~~~~~~~~~~
include/asm-generic/io.h:1184:9: note: in expansion of macro 'memcpy'
 1184 |         memcpy(buffer, __io_virt(addr), size);
      |         ^~~~~~

The problem here is the overflow of an unsigned 32-bit number to a
negative that gets converted into a signed 'long', keeping a large
positive number.

Replace the complex calculation with a more readable min() variant
that avoids the warning.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Arnd Bergmann 
Signed-off-by: Damien Le Moal 
Signed-off-by: Sasha Levin

ahci: asm1064: asm1166: don't limit reported ports

2024-04-13T10:50:08+00:00

[ Upstream commit 6cd8adc3e18960f6e59d797285ed34ef473cc896 ]

Previously, patches have been added to limit the reported count of SATA
ports for asm1064 and asm1166 SATA controllers, as those controllers do
report more ports than physically having.

While it is allowed to report more ports than physically having in CAP.NP,
it is not allowed to report more ports than physically having in the PI
(Ports Implemented) register, which is what these HBAs do.
(This is a AHCI spec violation.)

Unfortunately, it seems that the PMP implementation in these ASMedia HBAs
is also violating the AHCI and SATA-IO PMP specification.

What these HBAs do is that they do not report that they support PMP
(CAP.SPM (Supports Port Multiplier) is not set).

Instead, they have decided to add extra "virtual" ports in the PI register
that is used if a port multiplier is connected to any of the physical
ports of the HBA.

Enumerating the devices behind the PMP as specified in the AHCI and
SATA-IO specifications, by using PMP READ and PMP WRITE commands to the
physical ports of the HBA is not possible, you have to use the "virtual"
ports.

This is of course bad, because this gives us no way to detect the device
and vendor ID of the PMP actually connected to the HBA, which means that
we can not apply the proper PMP quirks for the PMP that is connected to
the HBA.

Limiting the port map will thus stop these controllers from working with
SATA Port Multipliers.

This patch reverts both patches for asm1064 and asm1166, so old behavior
is restored and SATA PMP will work again, but it will also reintroduce the
(minutes long) extra boot time for the ASMedia controllers that do not
have a PMP connected (either on the PCIe card itself, or an external PMP).

However, a longer boot time for some, is the lesser evil compared to some
other users not being able to detect their drives at all.

Fixes: 0077a504e1a4 ("ahci: asm1166: correct count of reported ports")
Fixes: 9815e3961754 ("ahci: asm1064: correct count of reported ports")
Cc: stable@vger.kernel.org
Reported-by: Matt 
Signed-off-by: Conrad Kostecki 
Reviewed-by: Hans de Goede 
[cassel: rewrote commit message]
Signed-off-by: Niklas Cassel 
Signed-off-by: Sasha Levin

ahci: asm1064: correct count of reported ports

2024-04-13T10:50:08+00:00

[ Upstream commit 9815e39617541ef52d0dfac4be274ad378c6dc09 ]

The ASM1064 SATA host controller always reports wrongly,
that it has 24 ports. But in reality, it only has four ports.

before:
ahci 0000:04:00.0: SSS flag set, parallel bus scan disabled
ahci 0000:04:00.0: AHCI 0001.0301 32 slots 24 ports 6 Gbps 0xffff0f impl SATA mode
ahci 0000:04:00.0: flags: 64bit ncq sntf stag pm led only pio sxs deso sadm sds apst

after:
ahci 0000:04:00.0: ASM1064 has only four ports
ahci 0000:04:00.0: forcing port_map 0xffff0f -> 0xf
ahci 0000:04:00.0: SSS flag set, parallel bus scan disabled
ahci 0000:04:00.0: AHCI 0001.0301 32 slots 24 ports 6 Gbps 0xf impl SATA mode
ahci 0000:04:00.0: flags: 64bit ncq sntf stag pm led only pio sxs deso sadm sds apst

Signed-off-by: "Andrey Jr. Melnikov" 
Signed-off-by: Niklas Cassel 
Stable-dep-of: 6cd8adc3e189 ("ahci: asm1064: asm1166: don't limit reported ports")
Signed-off-by: Sasha Levin

ahci: asm1166: correct count of reported ports

2024-03-01T12:06:09+00:00

[ Upstream commit 0077a504e1a4468669fd2e011108db49133db56e ]

The ASM1166 SATA host controller always reports wrongly,
that it has 32 ports. But in reality, it only has six ports.

This seems to be a hardware issue, as all tested ASM1166
SATA host controllers reports such high count of ports.

Example output: ahci 0000:09:00.0: AHCI 0001.0301
32 slots 32 ports 6 Gbps 0xffffff3f impl SATA mode.

By adjusting the port_map, the count is limited to six ports.

New output: ahci 0000:09:00.0: AHCI 0001.0301
32 slots 32 ports 6 Gbps 0x3f impl SATA mode.

Closes: https://bugzilla.kernel.org/show_bug.cgi?id=211873
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218346
Signed-off-by: Conrad Kostecki 
Reviewed-by: Hans de Goede 
Signed-off-by: Niklas Cassel 
Signed-off-by: Sasha Levin

ata: pata_isapnp: Add missing error check for devm_ioport_map()

2023-12-08T07:43:23+00:00

[ Upstream commit a6925165ea82b7765269ddd8dcad57c731aa00de ]

Add missing error return check for devm_ioport_map() and return the
error if this function call fails.

Fixes: 0d5ff566779f ("libata: convert to iomap")
Signed-off-by: Chen Ni 
Reviewed-by: Sergey Shtylyov 
Signed-off-by: Damien Le Moal 
Signed-off-by: Sasha Levin