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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Josef Bacik <jbacik@fb.com>, Steven Rostedt <rostedt@goodmis.org>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.4 17/64] tracing: Set kernel_stack's caller size properly
Date: Thu, 17 Sep 2020 22:15:56 -0400	[thread overview]
Message-ID: <20200918021643.2067895-17-sashal@kernel.org> (raw)
In-Reply-To: <20200918021643.2067895-1-sashal@kernel.org>

From: Josef Bacik <jbacik@fb.com>

[ Upstream commit cbc3b92ce037f5e7536f6db157d185cd8b8f615c ]

I noticed when trying to use the trace-cmd python interface that reading the raw
buffer wasn't working for kernel_stack events.  This is because it uses a
stubbed version of __dynamic_array that doesn't do the __data_loc trick and
encode the length of the array into the field.  Instead it just shows up as a
size of 0.  So change this to __array and set the len to FTRACE_STACK_ENTRIES
since this is what we actually do in practice and matches how user_stack_trace
works.

Link: http://lkml.kernel.org/r/1411589652-1318-1-git-send-email-jbacik@fb.com

Signed-off-by: Josef Bacik <jbacik@fb.com>
[ Pulled from the archeological digging of my INBOX ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/trace/trace_entries.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
index ee7b94a4810af..246db27dbdc99 100644
--- a/kernel/trace/trace_entries.h
+++ b/kernel/trace/trace_entries.h
@@ -178,7 +178,7 @@ FTRACE_ENTRY(kernel_stack, stack_entry,
 
 	F_STRUCT(
 		__field(	int,		size	)
-		__dynamic_array(unsigned long,	caller	)
+		__array(	unsigned long,	caller,	FTRACE_STACK_ENTRIES	)
 	),
 
 	F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
-- 
2.25.1


  parent reply	other threads:[~2020-09-18  2:22 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-18  2:15 [PATCH AUTOSEL 4.4 01/64] scsi: aacraid: fix illegal IO beyond last LBA Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 02/64] m68k: q40: Fix info-leak in rtc_ioctl Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 03/64] gma/gma500: fix a memory disclosure bug due to uninitialized bytes Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 04/64] ASoC: kirkwood: fix IRQ error handling Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 05/64] ata: sata_mv, avoid trigerrable BUG_ON Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 06/64] PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 07/64] mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd_setup() Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 08/64] mfd: mfd-core: Protect against NULL call-back function pointer Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 09/64] tracing: Adding NULL checks for trace_array descriptor pointer Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 10/64] bcache: fix a lost wake-up problem caused by mca_cannibalize_lock Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 11/64] xfs: fix attr leaf header freemap.size underflow Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 12/64] kernel/sys.c: avoid copying possible padding bytes in copy_to_user Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 13/64] neigh_stat_seq_next() should increase position index Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 14/64] rt_cpu_seq_next " Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 15/64] seqlock: Require WRITE_ONCE surrounding raw_seqcount_barrier Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 16/64] ACPI: EC: Reference count query handlers under lock Sasha Levin
2020-09-18  2:15 ` Sasha Levin [this message]
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 18/64] ext4: make dioread_nolock the default Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 19/64] ar5523: Add USB ID of SMCWUSBT-G2 wireless adapter Sasha Levin
2020-09-18  2:15 ` [PATCH AUTOSEL 4.4 20/64] Bluetooth: Fix refcount use-after-free issue Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 21/64] mm: pagewalk: fix termination condition in walk_pte_range() Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 22/64] Bluetooth: prefetch channel before killing sock Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 23/64] skbuff: fix a data race in skb_queue_len() Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 24/64] audit: CONFIG_CHANGE don't log internal bookkeeping as an event Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 25/64] selinux: sel_avc_get_stat_idx should increase position index Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 26/64] scsi: lpfc: Fix RQ buffer leakage when no IOCBs available Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 27/64] drm/omap: fix possible object reference leak Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 28/64] dmaengine: tegra-apb: Prevent race conditions on channel's freeing Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 29/64] media: go7007: Fix URB type for interrupt handling Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 30/64] Bluetooth: guard against controllers sending zero'd events Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 31/64] drm/amdgpu: increase atombios cmd timeout Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 32/64] Bluetooth: L2CAP: handle l2cap config request during open state Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 33/64] media: tda10071: fix unsigned sign extension overflow Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 34/64] tpm: ibmvtpm: Wait for buffer to be set before proceeding Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 35/64] tracing: Use address-of operator on section symbols Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 36/64] serial: 8250_omap: Fix sleeping function called from invalid context during probe Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 37/64] SUNRPC: Fix a potential buffer overflow in 'svc_print_xprts()' Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 38/64] ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 39/64] ALSA: usb-audio: Fix case when USB MIDI interface has more than one extra endpoint descriptor Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 40/64] mm/filemap.c: clear page error before actual read Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 41/64] mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 42/64] serial: uartps: Wait for tx_empty in console setup Sasha Levin
2020-09-28 20:16   ` Naresh Kamboju
2020-09-28 22:00     ` Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 43/64] KVM: Remove CREATE_IRQCHIP/SET_PIT2 race Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 44/64] bdev: Reduce time holding bd_mutex in sync in blkdev_close() Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 45/64] drivers: char: tlclk.c: Avoid data race between init and interrupt handler Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 46/64] dt-bindings: sound: wm8994: Correct required supplies based on actual implementaion Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 47/64] atm: fix a memory leak of vcc->user_back Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 48/64] phy: samsung: s5pv210-usb2: Add delay after reset Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 49/64] Bluetooth: Handle Inquiry Cancel error after Inquiry Complete Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 50/64] USB: EHCI: ehci-mv: fix error handling in mv_ehci_probe() Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 51/64] tty: serial: samsung: Correct clock selection logic Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 52/64] ALSA: hda: Fix potential race in unsol event handler Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 53/64] fuse: don't check refcount after stealing page Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 54/64] USB: EHCI: ehci-mv: fix less than zero comparison of an unsigned int Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 55/64] e1000: Do not perform reset in reset_task if we are already down Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 56/64] printk: handle blank console arguments passed in Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 57/64] vfio/pci: fix memory leaks of eventfd ctx Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 58/64] perf kcore_copy: Fix module map when there are no modules loaded Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 59/64] mtd: rawnand: omap_elm: Fix runtime PM imbalance on error Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 60/64] ceph: fix potential race in ceph_check_caps Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 61/64] mtd: parser: cmdline: Support MTD names containing one or more colons Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 62/64] x86/speculation/mds: Mark mds_user_clear_cpu_buffers() __always_inline Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 63/64] vfio/pci: Clear error and request eventfd ctx after releasing Sasha Levin
2020-09-18  2:16 ` [PATCH AUTOSEL 4.4 64/64] vfio/pci: fix racy on error and request eventfd ctx Sasha Levin

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