[ Upstream commit f861d36e021e1ac4a0a2a1f6411d623809975d63 ] rtsx_usb_probe() doesn't call usb_set_intfdata() to null out the interface pointer when probe fails. This leaves a stale pointer. Noticed the missing usb_set_intfdata() while debugging an unrelated invalid DMA mapping problem. Fix it with a call to usb_set_intfdata(..., NULL). Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/r/20220429210913.46804-1-skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit f387e86d3a74407bdd9c5815820ac9d060962840 ] To be sufficiently out of range for the usercopy test to see the lifetime mismatch, expand the size of the "bad" buffer, which will let it be beyond current_stack_pointer regardless of stack growth direction. Paired with the recent addition of stack depth checking under CONFIG_HARDENED_USERCOPY=y, this will correctly start tripping again. Reported-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Link: https://lore.kernel.org/lkml/762faf1b-0443-5ddf-4430-44a20cf2ec4d@collabora.com/ Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit e918c10265ef2bc82ce8a6fed6d8123d09ec1db3 ]
The pvpanic driver relies on panic notifiers to execute a callback
on panic event. Such function is executed in atomic context - the
panic function disables local IRQs, preemption and all other CPUs
that aren't running the panic code.
With that said, it's dangerous to use regular spinlocks in such path,
as introduced by commit b3c0f8774668 ("misc/pvpanic: probe multiple instances").
This patch fixes that by replacing regular spinlocks with the trylock
safer approach.
It also fixes an old comment (about a long gone framebuffer code) and
the notifier priority - we should execute hypervisor notifiers early,
deferring this way the panic action to the hypervisor, as expected by
the users that are setting up pvpanic.
Fixes: b3c0f8774668 ("misc/pvpanic: probe multiple instances")
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Mihai Carabas <mihai.carabas@oracle.com>
Cc: Shile Zhang <shile.zhang@linux.alibaba.com>
Cc: Wang ShaoBo <bobo.shaobowang@huawei.com>
Cc: zhenwei pi <pizhenwei@bytedance.com>
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Link: https://lore.kernel.org/r/20220427224924.592546-6-gpiccoli@igalia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 5ac11fe03a0a83042d1a040dbce4fa2fb5521e23 ]
The bug is here:
if (!buf) {
The list iterator value 'buf' will *always* be set and non-NULL
by list_for_each_entry(), so it is incorrect to assume that the
iterator value will be NULL if the list is empty (in this case, the
check 'if (!buf) {' will always be false and never exit expectly).
To fix the bug, use a new variable 'iter' as the list iterator,
while use the original variable 'buf' as a dedicated pointer to
point to the found element.
Fixes: 2419e55e532de ("misc: fastrpc: add mmap/unmap support")
Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com>
Link: https://lore.kernel.org/r/20220327062202.5720-1-xiam0nd.tong@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 8bfdbddd68249e0d8598777cca8249619ee51df0 ]
When you don't select CONFIG_UBSAN_TRAP, you get:
# echo ARRAY_BOUNDS > /sys/kernel/debug/provoke-crash/DIRECT
[ 102.265827] ================================================================================
[ 102.278433] UBSAN: array-index-out-of-bounds in drivers/misc/lkdtm/bugs.c:342:16
[ 102.287207] index 8 is out of range for type 'char [8]'
[ 102.298722] ================================================================================
[ 102.313712] lkdtm: FAIL: survived array bounds overflow!
[ 102.318770] lkdtm: Unexpected! This kernel (5.16.0-rc1-s3k-dev-01884-g720dcf79314a ppc) was built with CONFIG_UBSAN_BOUNDS=y
It is not correct because when CONFIG_UBSAN_TRAP is not selected
you can't expect array bounds overflow to kill the thread.
Modify the logic so that when the kernel is built with
CONFIG_UBSAN_BOUNDS but without CONFIG_UBSAN_TRAP, you get a warning
about CONFIG_UBSAN_TRAP not been selected instead.
This also require a fix of pr_expected_config(), otherwise the
following error is encountered.
CC drivers/misc/lkdtm/bugs.o
drivers/misc/lkdtm/bugs.c: In function 'lkdtm_ARRAY_BOUNDS':
drivers/misc/lkdtm/bugs.c:351:2: error: 'else' without a previous 'if'
351 | else
| ^~~~
Fixes: c75be56e35b2 ("lkdtm/bugs: Add ARRAY_BOUNDS to selftests")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/363b58690e907c677252467a94fe49444c80ea76.1649704381.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 4a9800c81d2f34afb66b4b42e0330ae8298019a2 ]
As the possible failure of the kmalloc(), the not_checked and checked
could be NULL pointer.
Therefore, it should be better to check it in order to avoid the
dereference of the NULL pointer.
Also, we need to kfree the 'not_checked' and 'checked' to avoid
the memory leak if fails.
And since it is just a test, it may directly return without error
number.
Fixes: ae2e1aad3e48 ("drivers/misc/lkdtm/bugs.c: add arithmetic overflow and array bounds checks")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220120092936.1874264-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 950cf957fe34d40d63dfa3bf3968210430b6491e ]
info_release() will be called in device_unregister() when info->dev's
reference count is 0. So there is no need to call ocxl_afu_put() and
kfree() again.
Fix this by adding free_minor() and return to err_unregister error path.
Fixes: 75ca758adbaf ("ocxl: Create a clear delineation between ocxl backend & frontend")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220418085758.38145-1-hbh25y@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit 5b47b751b760ee1c74a51660fd096aa148a362cd upstream.
Reading EEPROM fails with following warning:
[ 16.357496] ------------[ cut here ]------------
[ 16.357529] fsl_spi b01004c0.spi: rejecting DMA map of vmalloc memory
[ 16.357698] WARNING: CPU: 0 PID: 371 at include/linux/dma-mapping.h:326 fsl_spi_cpm_bufs+0x2a0/0x2d8
[ 16.357775] CPU: 0 PID: 371 Comm: od Not tainted 5.16.11-s3k-dev-01743-g19beecbfe9d6-dirty #109
[ 16.357806] NIP: c03fbc9c LR: c03fbc9c CTR: 00000000
[ 16.357825] REGS: e68d9b20 TRAP: 0700 Not tainted (5.16.11-s3k-dev-01743-g19beecbfe9d6-dirty)
[ 16.357849] MSR: 00029032 <EE,ME,IR,DR,RI> CR: 24002282 XER: 00000000
[ 16.357931]
[ 16.357931] GPR00: c03fbc9c e68d9be0 c26d06a0 00000039 00000001 c0d36364 c0e96428 00000027
[ 16.357931] GPR08: 00000001 00000000 00000023 3fffc000 24002282 100d3dd6 100a2ffc 00000000
[ 16.357931] GPR16: 100cd280 100b0000 00000000 aff54f7e 100d0000 100d0000 00000001 100cf328
[ 16.357931] GPR24: 100cf328 00000000 00000003 e68d9e30 c156b410 e67ab4c0 e68d9d38 c24ab278
[ 16.358253] NIP [c03fbc9c] fsl_spi_cpm_bufs+0x2a0/0x2d8
[ 16.358292] LR [c03fbc9c] fsl_spi_cpm_bufs+0x2a0/0x2d8
[ 16.358325] Call Trace:
[ 16.358336] [e68d9be0] [c03fbc9c] fsl_spi_cpm_bufs+0x2a0/0x2d8 (unreliable)
[ 16.358388] [e68d9c00] [c03fcb44] fsl_spi_bufs.isra.0+0x94/0x1a0
[ 16.358436] [e68d9c20] [c03fd970] fsl_spi_do_one_msg+0x254/0x3dc
[ 16.358483] [e68d9cb0] [c03f7e50] __spi_pump_messages+0x274/0x8a4
[ 16.358529] [e68d9ce0] [c03f9d30] __spi_sync+0x344/0x378
[ 16.358573] [e68d9d20] [c03fb52c] spi_sync+0x34/0x60
[ 16.358616] [e68d9d30] [c03b4dec] at25_ee_read+0x138/0x1a8
[ 16.358667] [e68d9e50] [c04a8fb8] bin_attr_nvmem_read+0x98/0x110
[ 16.358725] [e68d9e60] [c0204b14] kernfs_fop_read_iter+0xc0/0x1fc
[ 16.358774] [e68d9e80] [c0168660] vfs_read+0x284/0x410
[ 16.358821] [e68d9f00] [c016925c] ksys_read+0x6c/0x11c
[ 16.358863] [e68d9f30] [c00160e0] ret_from_syscall+0x0/0x28
...
[ 16.359608] ---[ end trace a4ce3e34afef0cb5 ]---
[ 16.359638] fsl_spi b01004c0.spi: unable to map tx dma
This is due to the AT25 driver using buffers on stack, which is not
possible with CONFIG_VMAP_STACK.
As mentionned in kernel Documentation (Documentation/spi/spi-summary.rst):
- Follow standard kernel rules, and provide DMA-safe buffers in
your messages. That way controller drivers using DMA aren't forced
to make extra copies unless the hardware requires it (e.g. working
around hardware errata that force the use of bounce buffering).
Modify the driver to use a buffer located in the at25 device structure
which is allocated via kmalloc during probe.
Protect writes in this new buffer with the driver's mutex.
Fixes: b587b13a4f67 ("[PATCH] SPI eeprom driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/230a9486fc68ea0182df46255e42a51099403642.1648032613.git.christophe.leroy@csgroup.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 26ef1c000bc21a192618c9ec651dd36ba63ca00c ] Various AXI errors can occur in the NIC engines and are reported to the driver by the f/w. Add code to print the errors and ack them to the f/w. Signed-off-by: Oded Gabbay <ogabbay@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 9a79e3e4a3637c07352d9723b825490a1b04391f ] This is not something we can do a workaround. It is clearly an error and we should notify the user that it is an error. Signed-off-by: Oded Gabbay <ogabbay@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>