Date
July 3, 2025, 3:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.720187] ================================================================== [ 15.720246] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 15.720305] Write of size 33 at addr fff00000c63d0280 by task kunit_try_catch/189 [ 15.720357] [ 15.720389] CPU: 1 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc1 #1 PREEMPT [ 15.720468] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.720493] Hardware name: linux,dummy-virt (DT) [ 15.720524] Call trace: [ 15.720546] show_stack+0x20/0x38 (C) [ 15.720645] dump_stack_lvl+0x8c/0xd0 [ 15.720716] print_report+0x118/0x608 [ 15.720762] kasan_report+0xdc/0x128 [ 15.720804] kasan_check_range+0x100/0x1a8 [ 15.720850] __asan_memset+0x34/0x78 [ 15.720894] kmalloc_uaf_memset+0x170/0x310 [ 15.720940] kunit_try_run_case+0x170/0x3f0 [ 15.721909] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.721995] kthread+0x328/0x630 [ 15.722314] ret_from_fork+0x10/0x20 [ 15.722542] [ 15.722687] Allocated by task 189: [ 15.722835] kasan_save_stack+0x3c/0x68 [ 15.722879] kasan_save_track+0x20/0x40 [ 15.723218] kasan_save_alloc_info+0x40/0x58 [ 15.723293] __kasan_kmalloc+0xd4/0xd8 [ 15.723511] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.723754] kmalloc_uaf_memset+0xb8/0x310 [ 15.723820] kunit_try_run_case+0x170/0x3f0 [ 15.723860] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.724133] kthread+0x328/0x630 [ 15.724426] ret_from_fork+0x10/0x20 [ 15.724522] [ 15.724709] Freed by task 189: [ 15.724738] kasan_save_stack+0x3c/0x68 [ 15.724881] kasan_save_track+0x20/0x40 [ 15.725001] kasan_save_free_info+0x4c/0x78 [ 15.725189] __kasan_slab_free+0x6c/0x98 [ 15.725350] kfree+0x214/0x3c8 [ 15.725565] kmalloc_uaf_memset+0x11c/0x310 [ 15.725611] kunit_try_run_case+0x170/0x3f0 [ 15.726045] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.726177] kthread+0x328/0x630 [ 15.726290] ret_from_fork+0x10/0x20 [ 15.726510] [ 15.726681] The buggy address belongs to the object at fff00000c63d0280 [ 15.726681] which belongs to the cache kmalloc-64 of size 64 [ 15.726914] The buggy address is located 0 bytes inside of [ 15.726914] freed 64-byte region [fff00000c63d0280, fff00000c63d02c0) [ 15.727122] [ 15.727201] The buggy address belongs to the physical page: [ 15.727336] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1063d0 [ 15.727726] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.727969] page_type: f5(slab) [ 15.728106] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 15.728247] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 15.728358] page dumped because: kasan: bad access detected [ 15.728395] [ 15.728551] Memory state around the buggy address: [ 15.728696] fff00000c63d0180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.728918] fff00000c63d0200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.729053] >fff00000c63d0280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.729250] ^ [ 15.729279] fff00000c63d0300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.729349] fff00000c63d0380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.729587] ==================================================================
[ 11.464717] ================================================================== [ 11.465135] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.465519] Write of size 33 at addr ffff888102dcca80 by task kunit_try_catch/205 [ 11.465841] [ 11.465935] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc1 #1 PREEMPT(voluntary) [ 11.465982] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.465994] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.466014] Call Trace: [ 11.466025] <TASK> [ 11.466042] dump_stack_lvl+0x73/0xb0 [ 11.466067] print_report+0xd1/0x650 [ 11.466089] ? __virt_addr_valid+0x1db/0x2d0 [ 11.466111] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.466132] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.466154] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.466176] kasan_report+0x141/0x180 [ 11.466198] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.466224] kasan_check_range+0x10c/0x1c0 [ 11.466256] __asan_memset+0x27/0x50 [ 11.466276] kmalloc_uaf_memset+0x1a3/0x360 [ 11.466298] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.466320] ? __schedule+0x10cc/0x2b60 [ 11.466355] ? __pfx_read_tsc+0x10/0x10 [ 11.466375] ? ktime_get_ts64+0x86/0x230 [ 11.466400] kunit_try_run_case+0x1a5/0x480 [ 11.466424] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.466445] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.466469] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.466492] ? __kthread_parkme+0x82/0x180 [ 11.466513] ? preempt_count_sub+0x50/0x80 [ 11.466537] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.466560] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.466582] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.466605] kthread+0x337/0x6f0 [ 11.466622] ? trace_preempt_on+0x20/0xc0 [ 11.466645] ? __pfx_kthread+0x10/0x10 [ 11.466663] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.466684] ? calculate_sigpending+0x7b/0xa0 [ 11.466705] ? __pfx_kthread+0x10/0x10 [ 11.466723] ret_from_fork+0x41/0x80 [ 11.466743] ? __pfx_kthread+0x10/0x10 [ 11.466761] ret_from_fork_asm+0x1a/0x30 [ 11.466791] </TASK> [ 11.466802] [ 11.474144] Allocated by task 205: [ 11.474407] kasan_save_stack+0x45/0x70 [ 11.474555] kasan_save_track+0x18/0x40 [ 11.474782] kasan_save_alloc_info+0x3b/0x50 [ 11.475020] __kasan_kmalloc+0xb7/0xc0 [ 11.475193] __kmalloc_cache_noprof+0x189/0x420 [ 11.475566] kmalloc_uaf_memset+0xa9/0x360 [ 11.475824] kunit_try_run_case+0x1a5/0x480 [ 11.476028] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.476261] kthread+0x337/0x6f0 [ 11.476457] ret_from_fork+0x41/0x80 [ 11.476627] ret_from_fork_asm+0x1a/0x30 [ 11.476763] [ 11.476834] Freed by task 205: [ 11.476994] kasan_save_stack+0x45/0x70 [ 11.477190] kasan_save_track+0x18/0x40 [ 11.477377] kasan_save_free_info+0x3f/0x60 [ 11.477519] __kasan_slab_free+0x56/0x70 [ 11.477698] kfree+0x222/0x3f0 [ 11.477859] kmalloc_uaf_memset+0x12b/0x360 [ 11.478064] kunit_try_run_case+0x1a5/0x480 [ 11.478278] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.478532] kthread+0x337/0x6f0 [ 11.478650] ret_from_fork+0x41/0x80 [ 11.478880] ret_from_fork_asm+0x1a/0x30 [ 11.479059] [ 11.479156] The buggy address belongs to the object at ffff888102dcca80 [ 11.479156] which belongs to the cache kmalloc-64 of size 64 [ 11.479796] The buggy address is located 0 bytes inside of [ 11.479796] freed 64-byte region [ffff888102dcca80, ffff888102dccac0) [ 11.480146] [ 11.480218] The buggy address belongs to the physical page: [ 11.480466] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102dcc [ 11.481178] flags: 0x200000000000000(node=0|zone=2) [ 11.481371] page_type: f5(slab) [ 11.481617] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.481902] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.482129] page dumped because: kasan: bad access detected [ 11.482381] [ 11.482477] Memory state around the buggy address: [ 11.482702] ffff888102dcc980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.483149] ffff888102dcca00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.483488] >ffff888102dcca80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.483905] ^ [ 11.484190] ffff888102dccb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.484494] ffff888102dccb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.484711] ==================================================================