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The exit function fixes a memory leak with the src field as detected by
leak sanitizer. An example of which is:
Indirect leak of 25133184 byte(s) in 207 object(s) allocated from:
#0 0x7f199ecfe987 in __interceptor_calloc libsanitizer/asan/asan_malloc_linux.cpp:154
#1 0x55defe638224 in annotated_source__alloc_histograms util/annotate.c:803
#2 0x55defe6397e4 in symbol__hists util/annotate.c:952
#3 0x55defe639908 in symbol__inc_addr_samples util/annotate.c:968
#4 0x55defe63aa29 in hist_entry__inc_addr_samples util/annotate.c:1119
#5 0x55defe499a79 in hist_iter__report_callback tools/perf/builtin-report.c:182
#6 0x55defe7a859d in hist_entry_iter__add util/hist.c:1236
#7 0x55defe49aa63 in process_sample_event tools/perf/builtin-report.c:315
#8 0x55defe731bc8 in evlist__deliver_sample util/session.c:1473
#9 0x55defe731e38 in machines__deliver_event util/session.c:1510
#10 0x55defe732a23 in perf_session__deliver_event util/session.c:1590
#11 0x55defe72951e in ordered_events__deliver_event util/session.c:183
#12 0x55defe740082 in do_flush util/ordered-events.c:244
#13 0x55defe7407cb in __ordered_events__flush util/ordered-events.c:323
#14 0x55defe740a61 in ordered_events__flush util/ordered-events.c:341
#15 0x55defe73837f in __perf_session__process_events util/session.c:2390
#16 0x55defe7385ff in perf_session__process_events util/session.c:2420
...
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211112035124.94327-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When perf report synthesize events from ARM SPE data, it refers to
current cpu, pid and tid in the machine. But there's no place to set
them in the ARM SPE decoder. I'm seeing all pid/tid is set to -1 and
user symbols are not resolved in the output.
# perf record -a -e arm_spe_0/ts_enable=1/ sleep 1
# perf report -q | head
8.77% 8.77% :-1 [kernel.kallsyms] [k] format_decode
7.02% 7.02% :-1 [kernel.kallsyms] [k] seq_printf
7.02% 7.02% :-1 [unknown] [.] 0x0000ffff9f687c34
5.26% 5.26% :-1 [kernel.kallsyms] [k] vsnprintf
3.51% 3.51% :-1 [kernel.kallsyms] [k] string
3.51% 3.51% :-1 [unknown] [.] 0x0000ffff9f66ae20
3.51% 3.51% :-1 [unknown] [.] 0x0000ffff9f670b3c
3.51% 3.51% :-1 [unknown] [.] 0x0000ffff9f67c040
1.75% 1.75% :-1 [kernel.kallsyms] [k] ___cache_free
1.75% 1.75% :-1 [kernel.kallsyms] [k] __count_memcg_events
Like Intel PT, add context switch records to track task info. As ARM
SPE support was added later than PERF_RECORD_SWITCH_CPU_WIDE, I think
we can safely set the attr.context_switch bit and use it.
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: German Gomez <german.gomez@arm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20211111133625.193568-2-german.gomez@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
commit 8779e05ba8 ("parisc: Fix ptrace check on syscall return")
fixed testing of TI_FLAGS. This uncovered a bug in the test mask.
syscall_restore_rfi is only used when the kernel needs to exit to
usespace with single or block stepping and the recovery counter
enabled. The test however used _TIF_SYSCALL_TRACE_MASK, which
includes a lot of bits that shouldn't be tested here.
Fix this by using TIF_SINGLESTEP and TIF_BLOCKSTEP directly.
I encountered this bug by enabling syscall tracepoints. Both in qemu and
on real hardware. As soon as i enabled the tracepoint (sys_exit_read,
but i guess it doesn't really matter which one), i got random page
faults in userspace almost immediately.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
For years, there have been random segmentation faults in userspace on
SMP PA-RISC machines. It occurred to me that this might be a problem in
set_pte_at(). MIPS and some other architectures do cache flushes when
installing PTEs with the present bit set.
Here I have adapted the code in update_mmu_cache() to flush the kernel
mapping when the kernel flush is deferred, or when the kernel mapping
may alias with the user mapping. This simplifies calls to
update_mmu_cache().
I also changed the barrier in set_pte() from a compiler barrier to a
full memory barrier. I know this change is not sufficient to fix the
problem. It might not be needed.
I have had a few days of operation with 5.14.16 to 5.15.1 and haven't
seen any random segmentation faults on rp3440 or c8000 so far.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@kernel.org # 5.12+
I noticed that sometimes at kernel startup the backtraces did not
included the function names of init functions. Their address were not
resolved to function names and instead only the address was printed.
Debugging shows that the culprit is is_ksym_addr() which is called
by the backtrace functions to check if an address belongs to a function in
the kernel. The problem occurs only for CONFIG_KALLSYMS_ALL=y.
When looking at is_ksym_addr() one can see that for CONFIG_KALLSYMS_ALL=y
the function only tries to resolve the address via is_kernel() function,
which checks like this:
if (addr >= _stext && addr <= _end)
return 1;
On parisc the init functions are located before _stext, so this check fails.
Other platforms seem to have all functions (including init functions)
behind _stext.
The following patch moves the _stext symbol at the beginning of the
kernel and thus includes the init section. This fixes the check and does
not seem to have any negative side effects on where the kernel mapping
happens in the map_pages() function in arch/parisc/mm/init.c.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@kernel.org # 5.4+
Pull more clk updates from Stephen Boyd:
"This is the second batch of clk driver updates that needed a little
more time to soak in linux-next.
- Use modern i2c probe in vc5
- Cleanup some includes
- Update links to datasheets
- Add UniPhier NX1 SoC clk support
- Fix DT bindings for SiFive FU740
- Revert the module platform driver support for Rockchip because it
wasn't actually tested
- Fix the composite clk code again as the previous fix had a one line
bug that broke rate changes for clks that want to use the same
parent still
- Use the right table for a divider in ast2600 driver
- Get rid of gcc_aggre1_pnoc_ahb_clk in qcom clk driver again because
its critical but unused"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: qcom: gcc-msm8996: Drop (again) gcc_aggre1_pnoc_ahb_clk
clk: imx8m: Do not set IMX_COMPOSITE_CORE for non-regular composites
clk/ast2600: Fix soc revision for AHB
clk: composite: Fix 'switching' to same clock
clk: rockchip: drop module parts from rk3399 and rk3568 drivers
Revert "clk: rockchip: use module_platform_driver_probe"
clk:mediatek: remove duplicate include in clk-mt8195-imp_iic_wrap.c
dt-bindings: clock: fu740-prci: add reset-cells
clk: uniphier: Add SoC-glue clock source selector support for Pro4
dt-bindings: clock: uniphier: Add clock binding for SoC-glue
clk: uniphier: Add NX1 clock support
dt-bindings: clock: uniphier: Add NX1 clock binding
clk: uniphier: Add audio system and video input clock control for PXs3
clk: si5351: Update datasheet references
clk: vc5: Use i2c .probe_new
clk/actions/owl-factor.c: remove superfluous headers
clk: ingenic: Fix bugs with divided dividers
Pull block fixes from Jens Axboe:
"Set of fixes that should go into this merge window:
- ioctl vs read data race fixes (Shin'ichiro)
- blkcg use-after-free fix (Laibin)
- Last piece of the puzzle for add_disk() error handling, enable
__must_check for (Luis)
- Request allocation fixes (Ming)
- Misc fixes (me)"
* tag 'block-5.16-2021-11-13' of git://git.kernel.dk/linux-block:
blk-mq: fix filesystem I/O request allocation
blkcg: Remove extra blkcg_bio_issue_init
block: Hold invalidate_lock in BLKRESETZONE ioctl
blk-mq: rename blk_attempt_bio_merge
blk-mq: don't grab ->q_usage_counter in blk_mq_sched_bio_merge
block: fix kerneldoc for disk_register_independent_access__ranges()
block: add __must_check for *add_disk*() callers
block: use enum type for blk_mq_alloc_data->rq_flags
block: Hold invalidate_lock in BLKZEROOUT ioctl
block: Hold invalidate_lock in BLKDISCARD ioctl
Pull io_uring fix from Jens Axboe:
"Just a single fix here for a buffered write hash stall, which is also
affecting stable"
* tag 'io_uring-5.16-2021-11-13' of git://git.kernel.dk/linux-block:
io-wq: serialize hash clear with wakeup
Pull more cifs updates from Steve French:
- improvements to reconnect and multichannel
- a performance improvement (additional use of SMB3 compounding)
- DFS code cleanup and improvements
- various trivial Coverity fixes
- two fscache fixes
- an fsync fix
* tag '5.16-rc-part2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6: (23 commits)
cifs: do not duplicate fscache cookie for secondary channels
cifs: connect individual channel servers to primary channel server
cifs: protect session channel fields with chan_lock
cifs: do not negotiate session if session already exists
smb3: do not setup the fscache_super_cookie until fsinfo initialized
cifs: fix potential use-after-free bugs
cifs: fix memory leak of smb3_fs_context_dup::server_hostname
smb3: add additional null check in SMB311_posix_mkdir
cifs: release lock earlier in dequeue_mid error case
smb3: add additional null check in SMB2_tcon
smb3: add additional null check in SMB2_open
smb3: add additional null check in SMB2_ioctl
smb3: remove trivial dfs compile warning
cifs: support nested dfs links over reconnect
smb3: do not error on fsync when readonly
cifs: for compound requests, use open handle if possible
cifs: set a minimum of 120s for next dns resolution
cifs: split out dfs code from cifs_reconnect()
cifs: convert list_for_each to entry variant
cifs: introduce new helper for cifs_reconnect()
...
This reverts commit b9d02f1bdd.
The error handling of that patch was fundamentally broken, and it needs
to be entirely re-done.
For example, in shmem_write_begin() it would call shmem_getpage(), then
ignore the error return from that, and look at the page pointer contents
instead.
And in shmem_read_mapping_page_gfp(), the patch tested PageHWPoison() on
a page pointer that two lines earlier had potentially been set as an
error pointer.
These issues could be individually fixed, but when it has this many
issues, I'm just reverting it instead of waiting for fixes.
Link: https://lore.kernel.org/linux-mm/20211111084617.6746-1-ajaygargnsit@gmail.com/
Reported-by: Ajay Garg <ajaygargnsit@gmail.com>
Reported-by: Jens Axboe <axboe@kernel.dk>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull ksmbd updates from Steve French:
"Several smb server fixes; three for stable:
- important fix for negotiation info validation
- fix alignment check in packet validation
- cleanup of dead code (like MD4)
- refactoring some protocol headers to use common code in smbfs_common"
* tag '5.16-rc-ksmbd-fixes' of git://git.samba.org/ksmbd:
ksmbd: Use the SMB3_Create definitions from the shared
ksmbd: Move more definitions into the shared area
ksmbd: use the common definitions for NEGOTIATE_PROTOCOL
ksmbd: switch to use shared definitions where available
ksmbd: change LeaseKey data type to u8 array
ksmbd: remove smb2_buf_length in smb2_transform_hdr
ksmbd: remove smb2_buf_length in smb2_hdr
ksmbd: remove md4 leftovers
ksmbd: set unique value to volume serial field in FS_VOLUME_INFORMATION
ksmbd: don't need 8byte alignment for request length in ksmbd_check_message
ksmbd: Fix buffer length check in fsctl_validate_negotiate_info()
ksmbd: Remove redundant 'flush_workqueue()' calls
ksmdb: use cmd helper variable in smb2_get_ksmbd_tcon()
ksmbd: use ksmbd_req_buf_next() in ksmbd_smb2_check_message()
ksmbd: use ksmbd_req_buf_next() in ksmbd_verify_smb_message()
Pull ceph updates from Ilya Dryomov:
"One notable change here is that async creates and unlinks introduced
in 5.7 are now enabled by default. This should greatly speed up things
like rm, tar and rsync. To opt out, wsync mount option can be used.
Other than that we have a pile of bug fixes all across the filesystem
from Jeff, Xiubo and Kotresh and a metrics infrastructure rework from
Luis"
* tag 'ceph-for-5.16-rc1' of git://github.com/ceph/ceph-client:
ceph: add a new metric to keep track of remote object copies
libceph, ceph: move ceph_osdc_copy_from() into cephfs code
ceph: clean-up metrics data structures to reduce code duplication
ceph: split 'metric' debugfs file into several files
ceph: return the real size read when it hits EOF
ceph: properly handle statfs on multifs setups
ceph: shut down mount on bad mdsmap or fsmap decode
ceph: fix mdsmap decode when there are MDS's beyond max_mds
ceph: ignore the truncate when size won't change with Fx caps issued
ceph: don't rely on error_string to validate blocklisted session.
ceph: just use ci->i_version for fscache aux info
ceph: shut down access to inode when async create fails
ceph: refactor remove_session_caps_cb
ceph: fix auth cap handling logic in remove_session_caps_cb
ceph: drop private list from remove_session_caps_cb
ceph: don't use -ESTALE as special return code in try_get_cap_refs
ceph: print inode numbers instead of pointer values
ceph: enable async dirops by default
libceph: drop ->monmap and err initialization
ceph: convert to noop_direct_IO
