Date
June 17, 2025, 3:39 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 93.057694] ================================================================== [ 93.058457] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0xd0/0x1d8 [ 93.059297] Write of size 33 at addr ffff0000c5f06680 by task kunit_try_catch/165 [ 93.060184] [ 93.060549] CPU: 1 PID: 165 Comm: kunit_try_catch Tainted: G B N 6.6.94-rc1 #1 [ 93.061537] Hardware name: linux,dummy-virt (DT) [ 93.062012] Call trace: [ 93.062239] dump_backtrace+0x9c/0x128 [ 93.062671] show_stack+0x20/0x38 [ 93.063258] dump_stack_lvl+0x60/0xb0 [ 93.063760] print_report+0xf8/0x5e8 [ 93.064274] kasan_report+0xdc/0x128 [ 93.064794] kasan_check_range+0xe8/0x190 [ 93.065324] __asan_memset+0x34/0x78 [ 93.065748] kmalloc_uaf_memset+0xd0/0x1d8 [ 93.066211] kunit_try_run_case+0x114/0x298 [ 93.066905] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 93.067390] kthread+0x18c/0x1a8 [ 93.067764] ret_from_fork+0x10/0x20 [ 93.068189] [ 93.068462] Allocated by task 165: [ 93.068852] kasan_save_stack+0x3c/0x68 [ 93.069421] kasan_set_track+0x2c/0x40 [ 93.069892] kasan_save_alloc_info+0x24/0x38 [ 93.070355] __kasan_kmalloc+0xd4/0xd8 [ 93.071122] kmalloc_trace+0x68/0x130 [ 93.071577] kmalloc_uaf_memset+0x9c/0x1d8 [ 93.072173] kunit_try_run_case+0x114/0x298 [ 93.072700] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 93.073338] kthread+0x18c/0x1a8 [ 93.073754] ret_from_fork+0x10/0x20 [ 93.074204] [ 93.074434] Freed by task 165: [ 93.074695] kasan_save_stack+0x3c/0x68 [ 93.075379] kasan_set_track+0x2c/0x40 [ 93.076011] kasan_save_free_info+0x38/0x60 [ 93.076799] __kasan_slab_free+0x100/0x170 [ 93.077395] __kmem_cache_free+0x178/0x2c8 [ 93.077896] kfree+0x74/0x138 [ 93.078299] kmalloc_uaf_memset+0xb8/0x1d8 [ 93.078854] kunit_try_run_case+0x114/0x298 [ 93.079561] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 93.080249] kthread+0x18c/0x1a8 [ 93.080660] ret_from_fork+0x10/0x20 [ 93.081150] [ 93.081360] The buggy address belongs to the object at ffff0000c5f06680 [ 93.081360] which belongs to the cache kmalloc-64 of size 64 [ 93.082345] The buggy address is located 0 bytes inside of [ 93.082345] freed 64-byte region [ffff0000c5f06680, ffff0000c5f066c0) [ 93.083569] [ 93.083854] The buggy address belongs to the physical page: [ 93.084403] page:0000000083b08542 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105f06 [ 93.085292] flags: 0xbfffc0000000800(slab|node=0|zone=2|lastcpupid=0xffff) [ 93.085983] page_type: 0xffffffff() [ 93.086383] raw: 0bfffc0000000800 ffff0000c0001640 dead000000000122 0000000000000000 [ 93.087122] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 93.087800] page dumped because: kasan: bad access detected [ 93.088371] [ 93.088826] Memory state around the buggy address: [ 93.089286] ffff0000c5f06580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 93.089938] ffff0000c5f06600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 93.090598] >ffff0000c5f06680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 93.091437] ^ [ 93.091781] ffff0000c5f06700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 93.092529] ffff0000c5f06780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 93.093162] ==================================================================
[ 34.230079] ================================================================== [ 34.230649] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0xdb/0x1d0 [ 34.231285] Write of size 33 at addr ffff888102864100 by task kunit_try_catch/180 [ 34.231628] [ 34.231921] CPU: 0 PID: 180 Comm: kunit_try_catch Tainted: G B N 6.6.94-rc1 #1 [ 34.232788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 34.233727] Call Trace: [ 34.234056] <TASK> [ 34.234357] dump_stack_lvl+0x4e/0x90 [ 34.234599] print_report+0xd2/0x650 [ 34.235054] ? __virt_addr_valid+0x156/0x1e0 [ 34.235582] ? kmalloc_uaf_memset+0xdb/0x1d0 [ 34.236119] ? kasan_complete_mode_report_info+0x64/0x200 [ 34.236514] ? kmalloc_uaf_memset+0xdb/0x1d0 [ 34.236832] kasan_report+0x147/0x180 [ 34.237302] ? kmalloc_uaf_memset+0xdb/0x1d0 [ 34.237846] kasan_check_range+0x10c/0x1c0 [ 34.238350] __asan_memset+0x27/0x50 [ 34.238819] kmalloc_uaf_memset+0xdb/0x1d0 [ 34.239181] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 34.239428] ? __schedule+0x715/0x11a0 [ 34.239634] ? ktime_get_ts64+0x118/0x140 [ 34.240180] kunit_try_run_case+0x120/0x290 [ 34.240692] ? __pfx_kunit_try_run_case+0x10/0x10 [ 34.241261] ? __kasan_check_write+0x18/0x20 [ 34.241794] ? trace_preempt_on+0x20/0xa0 [ 34.242282] ? __kthread_parkme+0x4f/0xd0 [ 34.242792] ? preempt_count_sub+0x50/0x80 [ 34.243308] ? __pfx_kunit_try_run_case+0x10/0x10 [ 34.243823] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 34.244136] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 34.244406] kthread+0x19e/0x1e0 [ 34.244603] ? __pfx_kthread+0x10/0x10 [ 34.245086] ret_from_fork+0x41/0x70 [ 34.245540] ? __pfx_kthread+0x10/0x10 [ 34.246064] ret_from_fork_asm+0x1b/0x30 [ 34.246569] </TASK> [ 34.246904] [ 34.247098] Allocated by task 180: [ 34.247483] kasan_save_stack+0x44/0x70 [ 34.247993] kasan_set_track+0x29/0x40 [ 34.248427] kasan_save_alloc_info+0x22/0x30 [ 34.248953] __kasan_kmalloc+0xb7/0xc0 [ 34.249389] kmalloc_trace+0x4c/0xb0 [ 34.249837] kmalloc_uaf_memset+0x9d/0x1d0 [ 34.250309] kunit_try_run_case+0x120/0x290 [ 34.250740] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 34.251144] kthread+0x19e/0x1e0 [ 34.251343] ret_from_fork+0x41/0x70 [ 34.251536] ret_from_fork_asm+0x1b/0x30 [ 34.251779] [ 34.251989] Freed by task 180: [ 34.252321] kasan_save_stack+0x44/0x70 [ 34.252797] kasan_set_track+0x29/0x40 [ 34.253232] kasan_save_free_info+0x2f/0x50 [ 34.253697] ____kasan_slab_free+0x172/0x1d0 [ 34.254184] __kasan_slab_free+0x16/0x20 [ 34.254618] __kmem_cache_free+0x190/0x310 [ 34.255092] kfree+0x7c/0x120 [ 34.255445] kmalloc_uaf_memset+0xbd/0x1d0 [ 34.255927] kunit_try_run_case+0x120/0x290 [ 34.256404] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 34.256941] kthread+0x19e/0x1e0 [ 34.257132] ret_from_fork+0x41/0x70 [ 34.257319] ret_from_fork_asm+0x1b/0x30 [ 34.257526] [ 34.257627] The buggy address belongs to the object at ffff888102864100 [ 34.257627] which belongs to the cache kmalloc-64 of size 64 [ 34.258824] The buggy address is located 0 bytes inside of [ 34.258824] freed 64-byte region [ffff888102864100, ffff888102864140) [ 34.260134] [ 34.260349] The buggy address belongs to the physical page: [ 34.260933] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102864 [ 34.261856] flags: 0x200000000000800(slab|node=0|zone=2) [ 34.262538] page_type: 0xffffffff() [ 34.262997] raw: 0200000000000800 ffff888100041640 dead000000000122 0000000000000000 [ 34.263568] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 34.264215] page dumped because: kasan: bad access detected [ 34.264772] [ 34.265010] Memory state around the buggy address: [ 34.265538] ffff888102864000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.266074] ffff888102864080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.266391] >ffff888102864100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.266696] ^ [ 34.267070] ffff888102864180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.267794] ffff888102864200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.268518] ==================================================================