diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2025-07-04 12:18:02 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2025-07-04 12:20:44 -0400 |
| commit | 16d16e721dbaf9f4bbb6d95503ce32dd007e9680 (patch) | |
| tree | ac2c42c32192db18b0771b3b6bca58a626f2872b /tools/perf/util/mem-events.c | |
| parent | 2d1bd7d637eab68aaa0282346de680b96f223beb (diff) | |
bcachefs: Fix bch2_btree_transactions_read() synchronizationbcachefs-testing
Since we're accessing btree_trans objects owned by another thread, we
need to guard against using pointers to freed key cache entries: we need
our own srcu read lock, and we should skip a btree_trans if it didn't
hold the srcu lock (and thus it might have pointers to freed key cache
entries).
00693 Mem abort info:
00693 ESR = 0x0000000096000005
00693 EC = 0x25: DABT (current EL), IL = 32 bits
00693 SET = 0, FnV = 0
00693 EA = 0, S1PTW = 0
00693 FSC = 0x05: level 1 translation fault
00693 Data abort info:
00693 ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
00693 CM = 0, WnR = 0, TnD = 0, TagAccess = 0
00693 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
00693 user pgtable: 4k pages, 39-bit VAs, pgdp=000000012e650000
00693 [000000008fb96218] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
00693 Internal error: Oops: 0000000096000005 [#1] SMP
00693 Modules linked in:
00693 CPU: 0 UID: 0 PID: 4307 Comm: cat Not tainted 6.16.0-rc2-ktest-g9e15af94fd86 #27578 NONE
00693 Hardware name: linux,dummy-virt (DT)
00693 pstate: 60001005 (nZCv daif -PAN -UAO -TCO -DIT +SSBS BTYPE=--)
00693 pc : six_lock_counts+0x20/0xe8
00693 lr : bch2_btree_bkey_cached_common_to_text+0x38/0x130
00693 sp : ffffff80ca98bb60
00693 x29: ffffff80ca98bb60 x28: 000000008fb96200 x27: 0000000000000007
00693 x26: ffffff80eafd06b8 x25: 0000000000000000 x24: ffffffc080d75a60
00693 x23: ffffff80eafd0000 x22: ffffffc080bdfcc0 x21: ffffff80eafd0210
00693 x20: ffffff80c192ff08 x19: 000000008fb96200 x18: 00000000ffffffff
00693 x17: 0000000000000000 x16: 0000000000000000 x15: 00000000ffffffff
00693 x14: 0000000000000000 x13: ffffff80ceb5a29a x12: 20796220646c6568
00693 x11: 72205d3e303c5b20 x10: 0000000000000020 x9 : ffffffc0805fb6b0
00693 x8 : 0000000000000020 x7 : 0000000000000000 x6 : 0000000000000020
00693 x5 : ffffff80ceb5a29c x4 : 0000000000000001 x3 : 000000000000029c
00693 x2 : 0000000000000000 x1 : ffffff80ef66c000 x0 : 000000008fb96200
00693 Call trace:
00693 six_lock_counts+0x20/0xe8 (P)
00693 bch2_btree_bkey_cached_common_to_text+0x38/0x130
00693 bch2_btree_trans_to_text+0x260/0x2a8
00693 bch2_btree_transactions_read+0xac/0x1e8
00693 full_proxy_read+0x74/0xd8
00693 vfs_read+0x90/0x300
00693 ksys_read+0x6c/0x108
00693 __arm64_sys_read+0x20/0x30
00693 invoke_syscall.constprop.0+0x54/0xe8
00693 do_el0_svc+0x44/0xc8
00693 el0_svc+0x18/0x58
00693 el0t_64_sync_handler+0x104/0x130
00693 el0t_64_sync+0x154/0x158
00693 Code: 910003fd f9423c22 f90017e2 d2800002 (f9400c01)
00693 ---[ end trace 0000000000000000 ]---
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'tools/perf/util/mem-events.c')
0 files changed, 0 insertions, 0 deletions