From: Jiri Olsa <olsajiri@gmail.com>
To: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Florent Revest <revest@chromium.org>,
linux-trace-kernel@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
bpf <bpf@vger.kernel.org>, Sven Schnelle <svens@linux.ibm.com>,
Alexei Starovoitov <ast@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Alan Maguire <alan.maguire@oracle.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>, Guo Ren <guoren@kernel.org>
Subject: Re: [PATCH v6 00/36] tracing: fprobe: function_graph: Multi-function graph and fprobe on fgraph
Date: Thu, 25 Jan 2024 15:54:53 +0100 [thread overview]
Message-ID: <ZbJ2PfSt3RM3pm43@krava> (raw)
In-Reply-To: <170505424954.459169.10630626365737237288.stgit@devnote2>
On Fri, Jan 12, 2024 at 07:10:50PM +0900, Masami Hiramatsu (Google) wrote:
> Hi,
>
> Here is the 6th version of the series to re-implement the fprobe on
> function-graph tracer. The previous version is;
>
> https://lore.kernel.org/all/170290509018.220107.1347127510564358608.stgit@devnote2/
>
> This version fixes use-after-unregister bug and arm64 stack unwinding
> bug [13/36], add an improvement for multiple interrupts during push
> operation[20/36], keep SAVE_REGS until BPF and fprobe_event using
> ftrace_regs[26/36], also reorder the patches[30/36][31/36] so that new
> fprobe can switch to SAVE_ARGS[32/36] safely.
> This series also temporarily adds a DIRECT_CALLS bugfix[1/36], which
> should be pushed separatedly as a stable bugfix.
>
> There are some TODOs:
> - Add s390x and loongarch support to fprobe (multiple fgraph).
> - Fix to get the symbol address from ftrace entry address on arm64.
> (This should be done in BPF trace event)
> - Cleanup code, rename some terms(offset/index) and FGRAPH_TYPE_BITMAP
> part should be merged to FGRAPH_TYPE_ARRAY patch.
hi,
I'm getting kasan bugs below when running bpf selftests on top of this
patchset.. I think it's probably the reason I see failures in some bpf
kprobe_multi/fprobe tests
so far I couldn't find the reason.. still checking ;-)
jirka
---
[ 507.585913][ T697] BUG: KASAN: slab-out-of-bounds in ftrace_push_return_trace.isra.0+0x346/0x370
[ 507.586747][ T697] Write of size 8 at addr ffff888148193ff8 by task test_progs/697
[ 507.587460][ T697]
[ 507.587713][ T697] CPU: 2 PID: 697 Comm: test_progs Tainted: G OE 6.7.0+ #309 d8e2cbcdc10865c6eb2d28ed0cbf958842aa75a8
[ 507.588821][ T697] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
[ 507.589681][ T697] Call Trace:
[ 507.590044][ T697] <TASK>
[ 507.590357][ T697] dump_stack_lvl+0xf6/0x180
[ 507.590807][ T697] print_report+0xc4/0x610
[ 507.591259][ T697] ? fixup_red_left+0x5/0x20
[ 507.591781][ T697] kasan_report+0xbe/0xf0
[ 507.592241][ T697] ? ftrace_push_return_trace.isra.0+0x346/0x370
[ 507.592928][ T697] ? ftrace_push_return_trace.isra.0+0x346/0x370
[ 507.593535][ T697] ? __pfx_text_poke_loc_init+0x10/0x10
[ 507.594076][ T697] ? ftrace_replace_code+0x17a/0x230
[ 507.594586][ T697] ftrace_push_return_trace.isra.0+0x346/0x370
[ 507.595192][ T697] ? __pfx_text_poke_loc_init+0x10/0x10
[ 507.595747][ T697] function_graph_enter_ops+0xbb/0x2d0
[ 507.596271][ T697] ? ftrace_replace_code+0x17a/0x230
[ 507.596784][ T697] ? __pfx_function_graph_enter_ops+0x10/0x10
[ 507.597353][ T697] ? preempt_count_sub+0x14/0xc0
[ 507.598576][ T697] ? __pfx_text_poke_loc_init+0x10/0x10
[ 507.599145][ T697] ? __pfx_fuse_sync_fs+0x10/0x10
[ 507.599718][ T697] ftrace_graph_func+0x142/0x270
[ 507.600293][ T697] ? __pfx_text_poke_loc_init+0x10/0x10
[ 507.600892][ T697] ? __pfx_fuse_conn_put.part.0+0x10/0x10
[ 507.601484][ T697] 0xffffffffa0560097
[ 507.602067][ T697] ? __pfx_fuse_conn_put.part.0+0x10/0x10
[ 507.602715][ T697] ? text_poke_loc_init+0x5/0x2e0
[ 507.603288][ T697] ? __pfx_fuse_conn_put.part.0+0x10/0x10
[ 507.603923][ T697] text_poke_loc_init+0x5/0x2e0
[ 507.604468][ T697] ftrace_replace_code+0x17a/0x230
[ 507.605071][ T697] ftrace_modify_all_code+0x131/0x1a0
[ 507.605663][ T697] ftrace_startup+0x10b/0x210
[ 507.606200][ T697] register_ftrace_graph+0x313/0x8a0
[ 507.606805][ T697] ? register_ftrace_graph+0x3fe/0x8a0
[ 507.607427][ T697] register_fprobe_ips.part.0+0x25a/0x3f0
[ 507.608090][ T697] bpf_kprobe_multi_link_attach+0x49e/0x850
[ 507.608781][ T697] ? __pfx_bpf_kprobe_multi_link_attach+0x10/0x10
[ 507.609500][ T697] ? __debug_check_no_obj_freed+0x1d8/0x3a0
[ 507.610194][ T697] ? __fget_light+0x96/0xe0
[ 507.610741][ T697] __sys_bpf+0x307a/0x3180
[ 507.611286][ T697] ? __pfx___sys_bpf+0x10/0x10
[ 507.611838][ T697] ? __kasan_slab_free+0x12d/0x1c0
[ 507.612434][ T697] ? audit_log_exit+0x8e0/0x1960
[ 507.613003][ T697] ? kmem_cache_free+0x19d/0x460
[ 507.613644][ T697] ? rcu_is_watching+0x34/0x60
[ 507.614202][ T697] ? lockdep_hardirqs_on_prepare+0xe/0x250
[ 507.614865][ T697] ? seqcount_lockdep_reader_access.constprop.0+0x105/0x120
[ 507.615662][ T697] ? seqcount_lockdep_reader_access.constprop.0+0xb2/0x120
[ 507.616431][ T697] __x64_sys_bpf+0x44/0x60
[ 507.616940][ T697] do_syscall_64+0x87/0x1b0
[ 507.617495][ T697] entry_SYSCALL_64_after_hwframe+0x6e/0x76
[ 507.618179][ T697] RIP: 0033:0x7ff2edca6b4d
[ 507.618745][ T697] Code: c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8b 92 0c 00 f7 d8 64 89 01 48
[ 507.620863][ T697] RSP: 002b:00007ffe2e58a8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000141
[ 507.621749][ T697] RAX: ffffffffffffffda RBX: 00007ffe2e58b018 RCX: 00007ff2edca6b4d
[ 507.622580][ T697] RDX: 0000000000000040 RSI: 00007ffe2e58a970 RDI: 000000000000001c
[ 507.623395][ T697] RBP: 00007ffe2e58a910 R08: 0000000000000001 R09: 00007ffe2e58a970
[ 507.624198][ T697] R10: 0000000000000007 R11: 0000000000000206 R12: 0000000000000001
[ 507.625029][ T697] R13: 0000000000000000 R14: 00007ff2eddee000 R15: 0000000000edcdb0
[ 507.625989][ T697] </TASK>
[ 507.626377][ T697]
[ 507.626678][ T697] Allocated by task 697:
[ 507.627175][ T697] kasan_save_stack+0x1c/0x40
[ 507.627757][ T697] kasan_save_track+0x10/0x30
[ 507.628992][ T697] __kasan_kmalloc+0xa6/0xb0
[ 507.629502][ T697] register_ftrace_graph+0x42b/0x8a0
[ 507.630071][ T697] register_fprobe_ips.part.0+0x25a/0x3f0
[ 507.630649][ T697] bpf_kprobe_multi_link_attach+0x49e/0x850
[ 507.631218][ T697] __sys_bpf+0x307a/0x3180
[ 507.631662][ T697] __x64_sys_bpf+0x44/0x60
[ 507.632128][ T697] do_syscall_64+0x87/0x1b0
[ 507.632577][ T697] entry_SYSCALL_64_after_hwframe+0x6e/0x76
[ 507.633136][ T697]
[ 507.633399][ T697] The buggy address belongs to the object at ffff888148194000
[ 507.633399][ T697] which belongs to the cache kmalloc-4k of size 4096
[ 507.634667][ T697] The buggy address is located 8 bytes to the left of
[ 507.634667][ T697] allocated 4096-byte region [ffff888148194000, ffff888148195000)
[ 507.636028][ T697]
[ 507.636392][ T697] The buggy address belongs to the physical page:
[ 507.637106][ T697] page:ffffea0005206400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x148190
[ 507.638206][ T697] head:ffffea0005206400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 507.639082][ T697] flags: 0x17ffe000000840(slab|head|node=0|zone=2|lastcpupid=0x3fff)
[ 507.639858][ T697] page_type: 0xffffffff()
[ 507.640306][ T697] raw: 0017ffe000000840 ffff888100043a40 ffffea0005a89610 ffffea0005d0de10
[ 507.641244][ T697] raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
[ 507.642184][ T697] page dumped because: kasan: bad access detected
[ 507.642853][ T697]
[ 507.643152][ T697] Memory state around the buggy address:
[ 507.643773][ T697] ffff888148193e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 507.644661][ T697] ffff888148193f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 507.645490][ T697] >ffff888148193f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 507.646263][ T697] ^
[ 507.647025][ T697] ffff888148194000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 507.647821][ T697] ffff888148194080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 507.648588][ T697] ==================================================================
---
[ 367.302586][ T973] BUG: KASAN: slab-out-of-bounds in ftrace_push_return_trace.isra.0+0x346/0x370
[ 367.303380][ T973] Write of size 8 at addr ffff888174e58ff8 by task kworker/u12:10/973
[ 367.304243][ T973]
[ 367.304599][ T973] CPU: 3 PID: 973 Comm: kworker/u12:10 Tainted: G OE 6.7.0+ #312 a13024221ef8bb3aaeade334af809d35027f09e3
[ 367.305894][ T973] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
[ 367.306834][ T973] Workqueue: writeback wb_workfn (flush-253:0)
[ 367.307415][ T973] Call Trace:
[ 367.307786][ T973] <TASK>
[ 367.308130][ T973] dump_stack_lvl+0xf6/0x180
[ 367.308610][ T973] print_report+0xc4/0x610
[ 367.309090][ T973] ? fixup_red_left+0x5/0x20
[ 367.309557][ T973] kasan_report+0xbe/0xf0
[ 367.309926][ T973] ? ftrace_push_return_trace.isra.0+0x346/0x370
[ 367.310404][ T973] ? ftrace_push_return_trace.isra.0+0x346/0x370
[ 367.310932][ T973] ? __pfx_unwind_get_return_address+0x10/0x10
[ 367.311529][ T973] ? arch_stack_walk+0x9e/0xf0
[ 367.312092][ T973] ftrace_push_return_trace.isra.0+0x346/0x370
[ 367.312769][ T973] ? __pfx_function_graph_enter_ops+0x10/0x10
[ 367.313414][ T973] ? __pfx_unwind_get_return_address+0x10/0x10
[ 367.313946][ T973] function_graph_enter_ops+0xbb/0x2d0
[ 367.314518][ T973] ? arch_stack_walk+0x9e/0xf0
[ 367.315016][ T973] ? __pfx_function_graph_enter_ops+0x10/0x10
[ 367.315540][ T973] ? ftrace_graph_func+0x173/0x270
[ 367.316084][ T973] ? __pfx_preempt_count_sub+0x10/0x10
[ 367.317791][ T973] ftrace_graph_func+0x142/0x270
[ 367.318231][ T973] ? __pfx_unwind_get_return_address+0x10/0x10
[ 367.318690][ T973] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 367.319159][ T973] 0xffffffffa0568097
[ 367.319542][ T973] ? preempt_count_sub+0x5/0xc0
[ 367.320073][ T973] ? preempt_count_sub+0x14/0xc0
[ 367.320610][ T973] ? preempt_count_sub+0x14/0xc0
[ 367.321226][ T973] ? unwind_get_return_address+0x5/0x50
[ 367.321862][ T973] unwind_get_return_address+0x5/0x50
[ 367.322449][ T973] arch_stack_walk+0x9e/0xf0
[ 367.322997][ T973] ? worker_thread+0x393/0x680
[ 367.323553][ T973] stack_trace_save+0x91/0xd0
[ 367.324087][ T973] ? __pfx_stack_trace_save+0x10/0x10
[ 367.324708][ T973] ? stack_trace_save+0x5/0xd0
[ 367.325244][ T973] ? kvm_sched_clock_read+0xd/0x20
[ 367.325822][ T973] kasan_save_stack+0x1c/0x40
[ 367.326326][ T973] ? kasan_save_stack+0x1c/0x40
[ 367.326828][ T973] ? kasan_save_track+0x10/0x30
[ 367.327298][ T973] ? __kasan_slab_alloc+0x85/0x90
[ 367.327803][ T973] ? kmem_cache_alloc+0x159/0x460
[ 367.328383][ T973] ? mempool_alloc+0xe1/0x270
[ 367.328925][ T973] ? bio_alloc_bioset+0x2c6/0x440
[ 367.329435][ T973] ? iomap_do_writepage+0x784/0x1090
[ 367.329993][ T973] ? write_cache_pages+0x2be/0x720
[ 367.330506][ T973] ? iomap_writepages+0x39/0x70
[ 367.331015][ T973] ? xfs_vm_writepages+0xf6/0x150
[ 367.331583][ T973] ? do_writepages+0x104/0x320
[ 367.332163][ T973] ? __writeback_single_inode+0x9e/0x6e0
[ 367.332754][ T973] ? writeback_sb_inodes+0x384/0x830
[ 367.333329][ T973] ? __writeback_inodes_wb+0x70/0x130
[ 367.333915][ T973] ? wb_writeback+0x486/0x5b0
[ 367.334437][ T973] ? wb_workfn+0x68b/0x8c0
[ 367.334942][ T973] ? process_one_work+0x48c/0x970
[ 367.335574][ T973] ? __pfx_function_graph_enter_ops+0x10/0x10
[ 367.336257][ T973] ? kmem_cache_alloc+0x415/0x460
[ 367.336818][ T973] ? __pfx_preempt_count_sub+0x10/0x10
[ 367.337426][ T973] ? iomap_do_writepage+0x784/0x1090
[ 367.337947][ T973] ? write_cache_pages+0x2be/0x720
[ 367.338475][ T973] ? iomap_writepages+0x39/0x70
[ 367.338981][ T973] ? xfs_vm_writepages+0xf6/0x150
[ 367.339514][ T973] ? do_writepages+0x104/0x320
[ 367.340065][ T973] ? ftrace_graph_func+0x173/0x270
[ 367.340658][ T973] ? __pfx_preempt_count_sub+0x10/0x10
[ 367.341225][ T973] ? mempool_alloc+0xe1/0x270
[ 367.341729][ T973] ? 0xffffffffa0568097
[ 367.342155][ T973] ? 0xffffffffa0568097
[ 367.342598][ T973] ? preempt_count_sub+0x5/0xc0
[ 367.343109][ T973] ? mempool_alloc+0xe1/0x270
[ 367.343590][ T973] kasan_save_track+0x10/0x30
[ 367.344040][ T973] __kasan_slab_alloc+0x85/0x90
[ 367.344542][ T973] kmem_cache_alloc+0x159/0x460
[ 367.345024][ T973] ? __pfx_mempool_alloc_slab+0x10/0x10
[ 367.345518][ T973] mempool_alloc+0xe1/0x270
[ 367.345997][ T973] ? __pfx_mempool_alloc+0x10/0x10
[ 367.346526][ T973] ? 0xffffffffa0568097
[ 367.346973][ T973] ? ftrace_push_return_trace.isra.0+0x17c/0x370
[ 367.348141][ T973] bio_alloc_bioset+0x2c6/0x440
[ 367.348653][ T973] ? __pfx_bio_alloc_bioset+0x10/0x10
[ 367.349221][ T973] iomap_do_writepage+0x784/0x1090
[ 367.349763][ T973] ? __pfx_iomap_do_writepage+0x10/0x10
[ 367.350306][ T973] ? __pfx_iomap_do_writepage+0x10/0x10
[ 367.350860][ T973] write_cache_pages+0x2be/0x720
[ 367.351366][ T973] ? __pfx_iomap_do_writepage+0x10/0x10
[ 367.351921][ T973] ? __pfx_write_cache_pages+0x10/0x10
[ 367.352468][ T973] ? ftrace_graph_func+0x173/0x270
[ 367.352967][ T973] ? ksys_fadvise64_64+0x8c/0xc0
[ 367.357367][ T973] ? __pfx_lock_release+0x10/0x10
[ 367.357872][ T973] ? __pfx_iomap_do_writepage+0x10/0x10
[ 367.358440][ T973] iomap_writepages+0x39/0x70
[ 367.358953][ T973] xfs_vm_writepages+0xf6/0x150
[ 367.359505][ T973] ? __pfx_xfs_vm_writepages+0x10/0x10
[ 367.360108][ T973] ? __pfx_xfs_vm_writepages+0x10/0x10
[ 367.360740][ T973] ? __pfx_xfs_vm_writepages+0x10/0x10
[ 367.361343][ T973] ? do_writepages+0x164/0x320
[ 367.361893][ T973] do_writepages+0x104/0x320
[ 367.362414][ T973] ? __pfx_do_writepages+0x10/0x10
[ 367.362957][ T973] ? 0xffffffffa0568097
[ 367.363449][ T973] ? __pfx___writeback_single_inode+0x10/0x10
[ 367.364114][ T973] __writeback_single_inode+0x9e/0x6e0
[ 367.364705][ T973] writeback_sb_inodes+0x384/0x830
[ 367.365295][ T973] ? __pfx_writeback_sb_inodes+0x10/0x10
[ 367.365857][ T973] ? __pfx_writeback_sb_inodes+0x10/0x10
[ 367.366505][ T973] ? super_trylock_shared+0x46/0x70
[ 367.367085][ T973] __writeback_inodes_wb+0x70/0x130
[ 367.367764][ T973] wb_writeback+0x486/0x5b0
[ 367.368300][ T973] ? __pfx_wb_writeback+0x10/0x10
[ 367.368860][ T973] ? 0xffffffffa0568097
[ 367.369339][ T973] ? __pfx_lock_release+0x10/0x10
[ 367.369940][ T973] wb_workfn+0x68b/0x8c0
[ 367.370473][ T973] ? _raw_spin_unlock_irqrestore+0x37/0xb0
[ 367.371131][ T973] ? __pfx_wb_workfn+0x10/0x10
[ 367.371600][ T973] ? ftrace_graph_func+0x173/0x270
[ 367.372110][ T973] ? __pfx_wb_workfn+0x10/0x10
[ 367.372609][ T973] ? 0xffffffffa0568097
[ 367.373044][ T973] ? __pfx_wb_workfn+0x10/0x10
[ 367.373507][ T973] ? process_one_work+0x483/0x970
[ 367.373990][ T973] ? rcu_is_watching+0x34/0x60
[ 367.374474][ T973] process_one_work+0x48c/0x970
[ 367.374956][ T973] ? __pfx_process_one_work+0x10/0x10
[ 367.375474][ T973] ? 0xffffffffa0568097
[ 367.375903][ T973] ? __list_add_valid_or_report+0x33/0xc0
[ 367.376518][ T973] ? worker_thread+0x375/0x680
[ 367.377065][ T973] worker_thread+0x393/0x680
[ 367.378058][ T973] ? __pfx_worker_thread+0x10/0x10
[ 367.378649][ T973] kthread+0x1ad/0x1f0
[ 367.379076][ T973] ? kthread+0xf2/0x1f0
[ 367.379513][ T973] ? __pfx_kthread+0x10/0x10
[ 367.380003][ T973] ret_from_fork+0x2d/0x50
[ 367.380483][ T973] ? __pfx_kthread+0x10/0x10
[ 367.380993][ T973] ret_from_fork_asm+0x1b/0x30
[ 367.381486][ T973] </TASK>
[ 367.381815][ T973]
[ 367.382070][ T973] Allocated by task 719:
[ 367.382508][ T973] kasan_save_stack+0x1c/0x40
[ 367.382988][ T973] kasan_save_track+0x10/0x30
[ 367.383477][ T973] __kasan_kmalloc+0xa6/0xb0
[ 367.383960][ T973] register_ftrace_graph+0x42b/0x8a0
[ 367.384454][ T973] register_fprobe_ips.part.0+0x25a/0x3f0
[ 367.385075][ T973] bpf_kprobe_multi_link_attach+0x49e/0x850
[ 367.385713][ T973] __sys_bpf+0x307a/0x3180
[ 367.386217][ T973] __x64_sys_bpf+0x44/0x60
[ 367.386716][ T973] do_syscall_64+0x87/0x1b0
[ 367.387220][ T973] entry_SYSCALL_64_after_hwframe+0x6e/0x76
[ 367.387878][ T973]
[ 367.388193][ T973] The buggy address belongs to the object at ffff888174e59000
[ 367.388193][ T973] which belongs to the cache kmalloc-4k of size 4096
[ 367.389731][ T973] The buggy address is located 8 bytes to the left of
[ 367.389731][ T973] allocated 4096-byte region [ffff888174e59000, ffff888174e5a000)
[ 367.391266][ T973]
[ 367.391580][ T973] The buggy address belongs to the physical page:
[ 367.392285][ T973] page:ffffea0005d39600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x174e58
[ 367.393398][ T973] head:ffffea0005d39600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 367.394437][ T973] flags: 0x17ffe000000840(slab|head|node=0|zone=2|lastcpupid=0x3fff)
[ 367.395335][ T973] page_type: 0xffffffff()
[ 367.395837][ T973] raw: 0017ffe000000840 ffff888100043a40 ffffea000674d010 ffffea0004bc8c10
[ 367.396786][ T973] raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
[ 367.397728][ T973] page dumped because: kasan: bad access detected
[ 367.398458][ T973]
[ 367.398766][ T973] Memory state around the buggy address:
[ 367.399411][ T973] ffff888174e58e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 367.400296][ T973] ffff888174e58f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 367.401189][ T973] >ffff888174e58f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 367.402093][ T973] ^
[ 367.402983][ T973] ffff888174e59000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 367.403879][ T973] ffff888174e59080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 367.404769][ T973] ==================================================================
next prev parent reply other threads:[~2024-01-25 14:54 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-12 10:10 [PATCH v6 00/36] tracing: fprobe: function_graph: Multi-function graph and fprobe on fgraph Masami Hiramatsu (Google)
2024-01-12 10:11 ` [PATCH v6 01/36] ftrace: Fix DIRECT_CALLS to use SAVE_REGS by default Masami Hiramatsu (Google)
2024-01-12 10:11 ` [PATCH v6 02/36] tracing: Add a comment about ftrace_regs definition Masami Hiramatsu (Google)
2024-01-12 10:11 ` [PATCH v6 03/36] tracing: Rename ftrace_regs_return_value to ftrace_regs_get_return_value Masami Hiramatsu (Google)
2024-01-12 10:11 ` [PATCH v6 04/36] x86: tracing: Add ftrace_regs definition in the header Masami Hiramatsu (Google)
2024-01-12 10:11 ` [PATCH v6 05/36] function_graph: Convert ret_stack to a series of longs Masami Hiramatsu (Google)
2024-01-12 10:12 ` [PATCH v6 06/36] fgraph: Use BUILD_BUG_ON() to make sure we have structures divisible by long Masami Hiramatsu (Google)
2024-01-12 10:12 ` [PATCH v6 07/36] function_graph: Add an array structure that will allow multiple callbacks Masami Hiramatsu (Google)
2024-01-12 10:12 ` [PATCH v6 08/36] function_graph: Allow multiple users to attach to function graph Masami Hiramatsu (Google)
2024-01-12 10:12 ` [PATCH v6 09/36] function_graph: Remove logic around ftrace_graph_entry and return Masami Hiramatsu (Google)
2024-01-12 10:12 ` [PATCH v6 10/36] ftrace/function_graph: Pass fgraph_ops to function graph callbacks Masami Hiramatsu (Google)
2024-01-12 10:13 ` [PATCH v6 11/36] ftrace: Allow function_graph tracer to be enabled in instances Masami Hiramatsu (Google)
2024-01-12 10:13 ` [PATCH v6 12/36] ftrace: Allow ftrace startup flags exist without dynamic ftrace Masami Hiramatsu (Google)
2024-01-12 10:13 ` [PATCH v6 13/36] function_graph: Have the instances use their own ftrace_ops for filtering Masami Hiramatsu (Google)
2024-01-12 10:13 ` [PATCH v6 14/36] function_graph: Use a simple LRU for fgraph_array index number Masami Hiramatsu (Google)
2024-01-12 10:13 ` [PATCH v6 15/36] function_graph: Add "task variables" per task for fgraph_ops Masami Hiramatsu (Google)
2024-01-12 10:14 ` [PATCH v6 16/36] function_graph: Move set_graph_function tests to shadow stack global var Masami Hiramatsu (Google)
2024-01-12 10:14 ` [PATCH v6 17/36] function_graph: Move graph depth stored data " Masami Hiramatsu (Google)
2024-01-12 10:14 ` [PATCH v6 18/36] function_graph: Move graph notrace bit " Masami Hiramatsu (Google)
2024-01-12 10:14 ` [PATCH v6 19/36] function_graph: Implement fgraph_reserve_data() and fgraph_retrieve_data() Masami Hiramatsu (Google)
2024-01-12 10:14 ` [PATCH v6 20/36] function_graph: Improve push operation for several interrupts Masami Hiramatsu (Google)
2024-01-12 10:14 ` [PATCH v6 21/36] function_graph: Add selftest for passing local variables Masami Hiramatsu (Google)
2024-01-12 10:15 ` [PATCH v6 22/36] function_graph: Add a new entry handler with parent_ip and ftrace_regs Masami Hiramatsu (Google)
2024-01-12 10:15 ` [PATCH v6 23/36] function_graph: Add a new exit " Masami Hiramatsu (Google)
2024-01-12 10:15 ` [PATCH v6 24/36] x86/ftrace: Enable HAVE_FUNCTION_GRAPH_FREGS Masami Hiramatsu (Google)
2024-01-12 10:15 ` [PATCH v6 25/36] arm64: ftrace: " Masami Hiramatsu (Google)
2024-01-12 10:15 ` [PATCH v6 26/36] fprobe: Use ftrace_regs in fprobe entry handler Masami Hiramatsu (Google)
2024-01-12 10:16 ` [PATCH v6 27/36] fprobe: Use ftrace_regs in fprobe exit handler Masami Hiramatsu (Google)
2024-01-12 10:16 ` [PATCH v6 28/36] tracing: Add ftrace_partial_regs() for converting ftrace_regs to pt_regs Masami Hiramatsu (Google)
2024-01-12 10:16 ` [PATCH v6 29/36] tracing: Add ftrace_fill_perf_regs() for perf event Masami Hiramatsu (Google)
2024-01-12 10:16 ` [PATCH v6 30/36] tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS Masami Hiramatsu (Google)
2024-01-12 10:16 ` [PATCH v6 31/36] bpf: Enable kprobe_multi feature if CONFIG_FPROBE is enabled Masami Hiramatsu (Google)
2024-01-12 10:17 ` [PATCH v6 32/36] fprobe: Rewrite fprobe on function-graph tracer Masami Hiramatsu (Google)
2024-01-25 15:11 ` Jiri Olsa
2024-01-26 15:24 ` Masami Hiramatsu
2024-01-12 10:17 ` [PATCH v6 33/36] tracing/fprobe: Remove nr_maxactive from fprobe Masami Hiramatsu (Google)
2024-01-12 10:17 ` [PATCH v6 34/36] selftests: ftrace: Remove obsolate maxactive syntax check Masami Hiramatsu (Google)
2024-01-12 10:17 ` [PATCH v6 35/36] selftests/ftrace: Add a test case for repeating register/unregister fprobe Masami Hiramatsu (Google)
2024-01-12 10:17 ` [PATCH v6 36/36] Documentation: probes: Update fprobe on function-graph tracer Masami Hiramatsu (Google)
2024-01-25 14:54 ` Jiri Olsa [this message]
2024-01-26 15:14 ` [PATCH v6 00/36] tracing: fprobe: function_graph: Multi-function graph and fprobe on fgraph Masami Hiramatsu
2024-01-27 0:56 ` Masami Hiramatsu
2024-01-27 18:44 ` Jiri Olsa
2024-01-28 7:51 ` Masami Hiramatsu
2024-01-29 9:54 ` Jiri Olsa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZbJ2PfSt3RM3pm43@krava \
--to=olsajiri@gmail.com \
--cc=acme@kernel.org \
--cc=alan.maguire@oracle.com \
--cc=alexei.starovoitov@gmail.com \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=guoren@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=martin.lau@linux.dev \
--cc=mhiramat@kernel.org \
--cc=peterz@infradead.org \
--cc=revest@chromium.org \
--cc=rostedt@goodmis.org \
--cc=svens@linux.ibm.com \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.