coresight: tmc: sg: Do not leak sg_table
Running perf with cs_etm on Juno triggers the following kmemleak warning !
:~# cat /sys/kernel/debug/kmemleak
unreferenced object 0xffffff8806b6d720 (size 96):
comm "perf", pid 562, jiffies 4297810960
hex dump (first 32 bytes):
38 d8 13 07 88 ff ff ff 00 d0 9e 85 c0 ff ff ff 8...............
00 10 00 88 c0 ff ff ff 00 f0 ff f7 ff 00 00 00 ................
backtrace (crc 1dbf6e00):
[<ffffffc08107381c>] kmemleak_alloc+0xbc/0xd8
[<ffffffc0802f9798>] kmalloc_trace_noprof+0x220/0x2e8
[<ffffffc07bb71948>] tmc_alloc_sg_table+0x48/0x208 [coresight_tmc]
[<ffffffc07bb71cbc>] tmc_etr_alloc_sg_buf+0xac/0x240 [coresight_tmc]
[<ffffffc07bb72538>] tmc_alloc_etr_buf.constprop.0+0x1f0/0x260 [coresight_tmc]
[<ffffffc07bb7280c>] alloc_etr_buf.constprop.0.isra.0+0x74/0xa8 [coresight_tmc]
[<ffffffc07bb72950>] tmc_alloc_etr_buffer+0x110/0x260 [coresight_tmc]
[<ffffffc07bb38afc>] etm_setup_aux+0x204/0x3b0 [coresight]
[<ffffffc08025837c>] rb_alloc_aux+0x20c/0x318
[<ffffffc08024dd84>] perf_mmap+0x2e4/0x7a0
[<ffffffc0802cceb0>] mmap_region+0x3b0/0xa08
[<ffffffc0802cd8a8>] do_mmap+0x3a0/0x500
[<ffffffc080295328>] vm_mmap_pgoff+0x100/0x1d0
[<ffffffc0802cadf8>] ksys_mmap_pgoff+0xb8/0x110
[<ffffffc080020688>] __arm64_sys_mmap+0x38/0x58
[<ffffffc080028fc0>] invoke_syscall.constprop.0+0x58/0x100
This due to the fact that we do not free the "sg_table" itself while
freeing up the SG table and data pages. Fix this by freeing the sg_table
in tmc_free_sg_table().
Fixes: 99443ea19e
("coresight: Add generic TMC sg table framework")
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20240702132846.1677261-1-suzuki.poulose@arm.com
This commit is contained in:
parent
e6b64cda39
commit
c58dc5a1f8
@ -261,6 +261,7 @@ void tmc_free_sg_table(struct tmc_sg_table *sg_table)
|
||||
{
|
||||
tmc_free_table_pages(sg_table);
|
||||
tmc_free_data_pages(sg_table);
|
||||
kfree(sg_table);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tmc_free_sg_table);
|
||||
|
||||
@ -342,7 +343,6 @@ struct tmc_sg_table *tmc_alloc_sg_table(struct device *dev,
|
||||
rc = tmc_alloc_table_pages(sg_table);
|
||||
if (rc) {
|
||||
tmc_free_sg_table(sg_table);
|
||||
kfree(sg_table);
|
||||
return ERR_PTR(rc);
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user