On Tue, Nov 21, 2023 at 1:08 PM <andrey.konovalov@xxxxxxxxx> wrote: > > From: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > > Evict alloc/free stack traces from the stack depot for Generic KASAN > once they are evicted from the quaratine. > > For auxiliary stack traces, evict the oldest stack trace once a new one > is saved (KASAN only keeps references to the last two). > > Also evict all saved stack traces on krealloc. > > To avoid double-evicting and mis-evicting stack traces (in case KASAN's > metadata was corrupted), reset KASAN's per-object metadata that stores > stack depot handles when the object is initialized and when it's evicted > from the quarantine. > > Note that stack_depot_put is no-op if the handle is 0. > > Reviewed-by: Marco Elver <elver@xxxxxxxxxx> > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> I observed boot hangs on a few SLUB configurations. Having other users of stackdepot might be the cause. After passing 'slub_debug=-' which disables SLUB debugging, it boots fine. compiler version: gcc-11 config: https://download.kerneltesting.org/builds/2023-11-21-f121f2/.config bisect log: https://download.kerneltesting.org/builds/2023-11-21-f121f2/bisect.log.txt [dmesg] (gdb) lx-dmesg [ 0.000000] Linux version 6.7.0-rc1-00136-g0e8b630f3053 (hyeyoo@localhost.localdomain) (gcc (GCC) 11.3.1 20221121 (R3[ 0.000000] Command line: console=ttyS0 root=/dev/sda1 nokaslr [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.7.0-rc1-00136-g0e8b630f3053 #22 [ 0.000000] RIP: 0010:setup_arch+0x500/0x2250 [ 0.000000] Code: c6 09 08 00 48 89 c5 48 85 c0 0f 84 58 13 00 00 48 c1 e8 03 48 83 05 be 97 66 00 01 80 3c 18 00 0f3[ 0.000000] RSP: 0000:ffffffff86007e00 EFLAGS: 00010046 ORIG_RAX: 0000000000000009 [ 0.000000] RAX: 1fffffffffe40088 RBX: dffffc0000000000 RCX: 1ffffffff11ed630 [ 0.000000] RDX: 0000000000000000 RSI: feec4698e8103000 RDI: ffffffff88f6b180 [ 0.000000] RBP: ffffffffff200444 R08: 8000000000000163 R09: 1ffffffff11ed628 [ 0.000000] R10: ffffffff88f7a150 R11: 0000000000000000 R12: 0000000000000010 [ 0.000000] R13: ffffffffff200450 R14: feec4698e8102444 R15: feec4698e8102444 [ 0.000000] FS: 0000000000000000(0000) GS:ffffffff88d5b000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: ffffffffff200444 CR3: 0000000008f0e000 CR4: 00000000000000b0 [ 0.000000] Call Trace: [ 0.000000] <TASK> [ 0.000000] ? show_regs+0x87/0xa0 [ 0.000000] ? early_fixup_exception+0x130/0x310 [ 0.000000] ? do_early_exception+0x23/0x90 [ 0.000000] ? early_idt_handler_common+0x2f/0x40 [ 0.000000] ? setup_arch+0x500/0x2250 [ 0.000000] ? __pfx_setup_arch+0x10/0x10 [ 0.000000] ? vprintk_default+0x20/0x30 [ 0.000000] ? vprintk+0x4c/0x80 [ 0.000000] ? _printk+0xba/0xf0 [ 0.000000] ? __pfx__printk+0x10/0x10 [ 0.000000] ? init_cgroup_root+0x10f/0x2f0 --Type <RET> for more, q to quit, c to continue without paging-- [ 0.000000] ? cgroup_init_early+0x1e4/0x440 [ 0.000000] ? start_kernel+0xae/0x790 [ 0.000000] ? x86_64_start_reservations+0x28/0x50 [ 0.000000] ? x86_64_start_kernel+0x10e/0x130 [ 0.000000] ? secondary_startup_64_no_verify+0x178/0x17b [ 0.000000] </TASK> -- Hyeonggon
