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Add a per-CPU memory leak, which will be reported like:
unreferenced object 0x3efa840195f8 (size 64):
comm "modprobe", pid 4667, jiffies 4294688677
hex dump (first 32 bytes on cpu 0):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 0):
[<ffffffffa7fa87af>] pcpu_alloc+0x3df/0x840
[<ffffffffc11642d9>] kmemleak_test_init+0x2c9/0x2f0 [kmemleak_test]
[<ffffffffa7c02264>] do_one_initcall+0x44/0x300
[<ffffffffa7de9e10>] do_init_module+0x60/0x240
[<ffffffffa7deb946>] init_module_from_file+0x86/0xc0
[<ffffffffa7deba99>] idempotent_init_module+0x109/0x2a0
[<ffffffffa7debd2a>] __x64_sys_finit_module+0x5a/0xb0
[<ffffffffa88f4f3a>] do_syscall_64+0x7a/0x160
[<ffffffffa8a0012b>] entry_SYSCALL_64_after_hwframe+0x76/0x7e
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Pavel Tikhomirov <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Cc: Alexander Mikhalitsyn <[email protected]>
Cc: Chen Jun <[email protected]>
Cc: Wei Yongjun <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in samples/kmemleak/kmemleak-test.o
Add the missing invocation of the MODULE_DESCRIPTION() macro.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Jeff Johnson <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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Drop the __init on kmemleak_test_init(). With it, the storage is
reclaimed, but then the symbol isn't available for "%pS" rendering,
and the backtrace gets a bare pointer where the actual leak happened.
unreferenced object 0xffff88800a2b0800 (size 1024):
comm "modprobe", pid 413, jiffies 4294953430
hex dump (first 32 bytes):
73 02 00 00 75 01 00 68 02 00 00 01 00 00 00 04 s...u..h........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000fabad728>] kmalloc_trace+0x26/0x90
[<00000000ef738764>] 0xffffffffc02350a2
[<00000000004e5795>] do_one_initcall+0x43/0x210
[<00000000d768905e>] do_init_module+0x4a/0x210
[<0000000087135ab5>] __do_sys_finit_module+0x93/0xf0
[<000000004fcb1fa2>] do_syscall_64+0x34/0x80
[<00000000c73c8d9d>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
with __init gone, that trace entry renders like:
[<00000000ef738764>] kmemleak_test_init+<offset>/<size>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Jim Cromie <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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kmemleak-test.c was moved to the samples directory in 1abbef4f51724
("mm,kmemleak-test.c: move kmemleak-test.c to samples dir").
If CONFIG_DEBUG_KMEMLEAK_TEST=m and CONFIG_SAMPLES is unset,
kmemleak-test.c will be unnecessarily compiled.
So move the entry for CONFIG_DEBUG_KMEMLEAK_TEST from mm/Kconfig and add a
new CONFIG_SAMPLE_KMEMLEAK in samples/ to control whether kmemleak-test.c
is built or not.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 1abbef4f51724 ("mm,kmemleak-test.c: move kmemleak-test.c to samples dir")
Signed-off-by: Hao Ge <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Alex Gaynor <[email protected]>
Cc: Alex Williamson <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Finn Behrens <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Tony Krowiak <[email protected]>
Cc: Ye Xingchen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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kmemleak-test.c is just a kmemleak test module, which also can not be used
as a built-in kernel module. Thus, i think it may should not be in mm
dir, and move the kmemleak-test.c to samples/kmemleak/kmemleak-test.c.
Fix the spelling of built-in by the way.
Signed-off-by: Hui Su <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Steven Rostedt (VMware) <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Divya Indi <[email protected]>
Cc: Tomas Winkler <[email protected]>
Cc: David Howells <[email protected]>
Link: https://lkml.kernel.org/r/20200925183729.GA172837@rlk
Signed-off-by: Linus Torvalds <[email protected]>
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