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| author | Dean Luick <dean.luick@cornelisnetworks.com> | 2022-10-18 17:27:50 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2022-10-19 10:06:07 +0300 |
| commit | 1afac08b39d85437187bb2a92d89a741b1078f55 (patch) | |
| tree | cd0817bb40ff85d1665d1acf0045f83a44c6baeb /include/linux/fpga/fpga-bridge.h | |
| parent | eb83f502adb036cd56c27e13b9ca3b2aabfa790b (diff) | |
| download | linux-1afac08b39d85437187bb2a92d89a741b1078f55.tar.xz | |
IB/hfi1: Correctly move list in sc_disable()
Commit 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()")
incorrectly tries to move a list from one list head to another. The
result is a kernel crash.
The crash is triggered when a link goes down and there are waiters for a
send to complete. The following signature is seen:
BUG: kernel NULL pointer dereference, address: 0000000000000030
[...]
Call Trace:
sc_disable+0x1ba/0x240 [hfi1]
pio_freeze+0x3d/0x60 [hfi1]
handle_freeze+0x27/0x1b0 [hfi1]
process_one_work+0x1b0/0x380
? process_one_work+0x380/0x380
worker_thread+0x30/0x360
? process_one_work+0x380/0x380
kthread+0xd7/0x100
? kthread_complete_and_exit+0x20/0x20
ret_from_fork+0x1f/0x30
The fix is to use the correct call to move the list.
Fixes: 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()")
Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://lore.kernel.org/r/166610327042.674422.6146908799669288976.stgit@awfm-02.cornelisnetworks.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'include/linux/fpga/fpga-bridge.h')
0 files changed, 0 insertions, 0 deletions