* Yu Zhao <yuzhao@xxxxxxxxxx> [220615 21:59]: > On Wed, Jun 15, 2022 at 7:50 PM Liam Howlett <liam.howlett@xxxxxxxxxx> wrote: > > > > * Yu Zhao <yuzhao@xxxxxxxxxx> [220615 17:17]: > > > > ... > > > > > > Yes, I used the same parameters with 512GB of RAM, and the kernel with > > > > KASAN and other debug options. > > > > > > Sorry, Liam. I got the same crash :( > > > > Thanks for running this promptly. I am trying to get my own server > > setup now. > > > > > > > > 9d27f2f1487a (tag: mm-everything-2022-06-14-19-05, akpm/mm-everything) > > > 00d4d7b519d6 fs/userfaultfd: Fix vma iteration in mas_for_each() loop > > > 55140693394d maple_tree: Make mas_prealloc() error checking more generic > > > 2d7e7c2fcf16 maple_tree: Fix mt_destroy_walk() on full non-leaf non-alloc nodes > > > 4d4472148ccd maple_tree: Change spanning store to work on larger trees > > > ea36bcc14c00 test_maple_tree: Add tests for preallocations and large > > > spanning writes > > > 0d2aa86ead4f mm/mlock: Drop dead code in count_mm_mlocked_page_nr() > > > > > > ================================================================== > > > BUG: KASAN: slab-out-of-bounds in mab_mas_cp+0x2d9/0x6c0 > > > Write of size 136 at addr ffff88c35a3b9e80 by task stress-ng/19303 > > > > > > CPU: 66 PID: 19303 Comm: stress-ng Tainted: G S I 5.19.0-smp-DEV #1 > > > Call Trace: > > > <TASK> > > > dump_stack_lvl+0xc5/0xf4 > > > print_address_description+0x7f/0x460 > > > print_report+0x10b/0x240 > > > ? mab_mas_cp+0x2d9/0x6c0 > > > kasan_report+0xe6/0x110 > > > ? mast_spanning_rebalance+0x2634/0x29b0 > > > ? mab_mas_cp+0x2d9/0x6c0 > > > kasan_check_range+0x2ef/0x310 > > > ? mab_mas_cp+0x2d9/0x6c0 > > > ? mab_mas_cp+0x2d9/0x6c0 > > > memcpy+0x44/0x70 > > > mab_mas_cp+0x2d9/0x6c0 > > > mas_spanning_rebalance+0x1a3e/0x4f90 > > > > Does this translate to an inline around line 2997? > > And then probably around 2808? > > $ ./scripts/faddr2line vmlinux mab_mas_cp+0x2d9 > mab_mas_cp+0x2d9/0x6c0: > mab_mas_cp at lib/maple_tree.c:1988 > $ ./scripts/faddr2line vmlinux mas_spanning_rebalance+0x1a3e > mas_spanning_rebalance+0x1a3e/0x4f90: > mast_cp_to_nodes at lib/maple_tree.c:? > (inlined by) mas_spanning_rebalance at lib/maple_tree.c:2997 > $ ./scripts/faddr2line vmlinux mas_wr_spanning_store+0x16c5 > mas_wr_spanning_store+0x16c5/0x1b80: > mas_wr_spanning_store at lib/maple_tree.c:? > > No idea why faddr2line didn't work for the last two addresses. GDB > seems more reliable. > > (gdb) li *(mab_mas_cp+0x2d9) > 0xffffffff8226b049 is in mab_mas_cp (lib/maple_tree.c:1988). > (gdb) li *(mas_spanning_rebalance+0x1a3e) > 0xffffffff822633ce is in mas_spanning_rebalance (lib/maple_tree.c:2801). > quit) > (gdb) li *(mas_wr_spanning_store+0x16c5) > 0xffffffff8225cfb5 is in mas_wr_spanning_store (lib/maple_tree.c:4030). Thanks. I am not having luck recreating it. I am hitting what looks like an unrelated issue in the unstable mm, "scheduling while atomic". I will try the git commit you indicate above.
