diff options
| author | Li Zhijian <lizhijian@fujitsu.com> | 2022-10-30 03:04:33 +0000 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-11-18 20:15:51 -0400 |
| commit | 7d984dac8f6bf4ebd3398af82b357e1d181ecaac (patch) | |
| tree | e49e011a14ce55d408ea0d506c6b5f1cb940593b | |
| parent | 8e1a76493be9868fef34f977296a69769dcdfa6f (diff) | |
RDMA/rxe: Fix mr->map double free
rxe_mr_cleanup() which tries to free mr->map again will be called when
rxe_mr_init_user() fails:
CPU: 0 PID: 4917 Comm: rdma_flush_serv Kdump: loaded Not tainted 6.1.0-rc1-roce-flush+ #25
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x45/0x5d
panic+0x19e/0x349
end_report.part.0+0x54/0x7c
kasan_report.cold+0xa/0xf
rxe_mr_cleanup+0x9d/0xf0 [rdma_rxe]
__rxe_cleanup+0x10a/0x1e0 [rdma_rxe]
rxe_reg_user_mr+0xb7/0xd0 [rdma_rxe]
ib_uverbs_reg_mr+0x26a/0x480 [ib_uverbs]
ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x1a2/0x250 [ib_uverbs]
ib_uverbs_cmd_verbs+0x1397/0x15a0 [ib_uverbs]
This issue was firstly exposed since commit b18c7da63fcb ("RDMA/rxe: Fix
memory leak in error path code") and then we fixed it in commit
8ff5f5d9d8cf ("RDMA/rxe: Prevent double freeing rxe_map_set()") but this
fix was reverted together at last by commit 1e75550648da (Revert
"RDMA/rxe: Create duplicate mapping tables for FMRs")
Simply let rxe_mr_cleanup() always handle freeing the mr->map once it is
successfully allocated.
Fixes: 1e75550648da ("Revert "RDMA/rxe: Create duplicate mapping tables for FMRs"")
Link: https://lore.kernel.org/r/1667099073-2-1-git-send-email-lizhijian@fujitsu.com
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_mr.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c index cd846cf82a84..b1423000e4bc 100644 --- a/drivers/infiniband/sw/rxe/rxe_mr.c +++ b/drivers/infiniband/sw/rxe/rxe_mr.c @@ -97,6 +97,7 @@ err2: kfree(mr->map[i]); kfree(mr->map); + mr->map = NULL; err1: return -ENOMEM; } @@ -120,7 +121,6 @@ int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova, int num_buf; void *vaddr; int err; - int i; umem = ib_umem_get(&rxe->ib_dev, start, length, access); if (IS_ERR(umem)) { @@ -159,9 +159,8 @@ int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova, if (!vaddr) { rxe_dbg_mr(mr, "Unable to get virtual address\n"); err = -ENOMEM; - goto err_cleanup_map; + goto err_release_umem; } - buf->addr = (uintptr_t)vaddr; buf->size = PAGE_SIZE; num_buf++; @@ -178,10 +177,6 @@ int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova, return 0; -err_cleanup_map: - for (i = 0; i < mr->num_map; i++) - kfree(mr->map[i]); - kfree(mr->map); err_release_umem: ib_umem_release(umem); err_out: |