Date
June 24, 2025, 12:47 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.106991] ================================================================== [ 24.107109] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 24.107235] Write of size 33 at addr fff00000c5a25000 by task kunit_try_catch/188 [ 24.107358] [ 24.107536] CPU: 0 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc2 #1 PREEMPT [ 24.108033] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.108151] Hardware name: linux,dummy-virt (DT) [ 24.108243] Call trace: [ 24.108433] show_stack+0x20/0x38 (C) [ 24.108752] dump_stack_lvl+0x8c/0xd0 [ 24.108892] print_report+0x118/0x608 [ 24.109230] kasan_report+0xdc/0x128 [ 24.109526] kasan_check_range+0x100/0x1a8 [ 24.109728] __asan_memset+0x34/0x78 [ 24.109848] kmalloc_uaf_memset+0x170/0x310 [ 24.110199] kunit_try_run_case+0x170/0x3f0 [ 24.110395] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.110554] kthread+0x328/0x630 [ 24.110691] ret_from_fork+0x10/0x20 [ 24.110917] [ 24.111056] Allocated by task 188: [ 24.111208] kasan_save_stack+0x3c/0x68 [ 24.111325] kasan_save_track+0x20/0x40 [ 24.111440] kasan_save_alloc_info+0x40/0x58 [ 24.111570] __kasan_kmalloc+0xd4/0xd8 [ 24.111807] __kmalloc_cache_noprof+0x16c/0x3c0 [ 24.112077] kmalloc_uaf_memset+0xb8/0x310 [ 24.112186] kunit_try_run_case+0x170/0x3f0 [ 24.112284] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.112410] kthread+0x328/0x630 [ 24.112532] ret_from_fork+0x10/0x20 [ 24.112767] [ 24.112826] Freed by task 188: [ 24.112902] kasan_save_stack+0x3c/0x68 [ 24.113255] kasan_save_track+0x20/0x40 [ 24.113459] kasan_save_free_info+0x4c/0x78 [ 24.113727] __kasan_slab_free+0x6c/0x98 [ 24.113891] kfree+0x214/0x3c8 [ 24.113980] kmalloc_uaf_memset+0x11c/0x310 [ 24.114072] kunit_try_run_case+0x170/0x3f0 [ 24.114169] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.114291] kthread+0x328/0x630 [ 24.114404] ret_from_fork+0x10/0x20 [ 24.114495] [ 24.114569] The buggy address belongs to the object at fff00000c5a25000 [ 24.114569] which belongs to the cache kmalloc-64 of size 64 [ 24.114707] The buggy address is located 0 bytes inside of [ 24.114707] freed 64-byte region [fff00000c5a25000, fff00000c5a25040) [ 24.114902] [ 24.115018] The buggy address belongs to the physical page: [ 24.115132] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a25 [ 24.115420] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.115554] page_type: f5(slab) [ 24.115864] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 24.116012] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 24.116144] page dumped because: kasan: bad access detected [ 24.116270] [ 24.116321] Memory state around the buggy address: [ 24.116423] fff00000c5a24f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.116560] fff00000c5a24f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.116677] >fff00000c5a25000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.116783] ^ [ 24.117112] fff00000c5a25080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.117267] fff00000c5a25100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.117556] ==================================================================
[ 12.039903] ================================================================== [ 12.040422] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 12.041313] Write of size 33 at addr ffff8881039dbd00 by task kunit_try_catch/206 [ 12.042322] [ 12.042480] CPU: 0 UID: 0 PID: 206 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc2 #1 PREEMPT(voluntary) [ 12.042549] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.042568] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.042607] Call Trace: [ 12.042648] <TASK> [ 12.042687] dump_stack_lvl+0x73/0xb0 [ 12.042743] print_report+0xd1/0x650 [ 12.042776] ? __virt_addr_valid+0x1db/0x2d0 [ 12.042809] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.042839] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.042896] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.042931] kasan_report+0x141/0x180 [ 12.042962] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.043006] kasan_check_range+0x10c/0x1c0 [ 12.043042] __asan_memset+0x27/0x50 [ 12.043078] kmalloc_uaf_memset+0x1a3/0x360 [ 12.043120] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.043165] ? __schedule+0x10cc/0x2b60 [ 12.043198] ? __pfx_read_tsc+0x10/0x10 [ 12.043219] ? ktime_get_ts64+0x86/0x230 [ 12.043246] kunit_try_run_case+0x1a5/0x480 [ 12.043273] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.043324] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.043373] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.043407] ? __kthread_parkme+0x82/0x180 [ 12.043431] ? preempt_count_sub+0x50/0x80 [ 12.043457] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.043480] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.043502] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.043524] kthread+0x337/0x6f0 [ 12.043558] ? trace_preempt_on+0x20/0xc0 [ 12.043586] ? __pfx_kthread+0x10/0x10 [ 12.043603] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.043639] ? calculate_sigpending+0x7b/0xa0 [ 12.043666] ? __pfx_kthread+0x10/0x10 [ 12.043683] ret_from_fork+0x41/0x80 [ 12.043704] ? __pfx_kthread+0x10/0x10 [ 12.043720] ret_from_fork_asm+0x1a/0x30 [ 12.043751] </TASK> [ 12.043765] [ 12.054091] Allocated by task 206: [ 12.054616] kasan_save_stack+0x45/0x70 [ 12.054916] kasan_save_track+0x18/0x40 [ 12.055130] kasan_save_alloc_info+0x3b/0x50 [ 12.055608] __kasan_kmalloc+0xb7/0xc0 [ 12.055930] __kmalloc_cache_noprof+0x189/0x420 [ 12.056258] kmalloc_uaf_memset+0xa9/0x360 [ 12.056853] kunit_try_run_case+0x1a5/0x480 [ 12.057117] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.057635] kthread+0x337/0x6f0 [ 12.057818] ret_from_fork+0x41/0x80 [ 12.058105] ret_from_fork_asm+0x1a/0x30 [ 12.058567] [ 12.058740] Freed by task 206: [ 12.058988] kasan_save_stack+0x45/0x70 [ 12.059244] kasan_save_track+0x18/0x40 [ 12.059663] kasan_save_free_info+0x3f/0x60 [ 12.059923] __kasan_slab_free+0x56/0x70 [ 12.060156] kfree+0x222/0x3f0 [ 12.060447] kmalloc_uaf_memset+0x12b/0x360 [ 12.060729] kunit_try_run_case+0x1a5/0x480 [ 12.061044] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.061306] kthread+0x337/0x6f0 [ 12.061457] ret_from_fork+0x41/0x80 [ 12.061757] ret_from_fork_asm+0x1a/0x30 [ 12.062084] [ 12.062248] The buggy address belongs to the object at ffff8881039dbd00 [ 12.062248] which belongs to the cache kmalloc-64 of size 64 [ 12.063041] The buggy address is located 0 bytes inside of [ 12.063041] freed 64-byte region [ffff8881039dbd00, ffff8881039dbd40) [ 12.063808] [ 12.063973] The buggy address belongs to the physical page: [ 12.064262] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039db [ 12.064953] flags: 0x200000000000000(node=0|zone=2) [ 12.065501] page_type: f5(slab) [ 12.065826] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.066154] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.066654] page dumped because: kasan: bad access detected [ 12.067095] [ 12.067262] Memory state around the buggy address: [ 12.067757] ffff8881039dbc00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.068211] ffff8881039dbc80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.068816] >ffff8881039dbd00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.069109] ^ [ 12.069390] ffff8881039dbd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.069850] ffff8881039dbe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.070099] ==================================================================