Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.817730] ================================================================== [ 22.817961] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 22.818129] Read of size 1 at addr fff00000c57223a8 by task kunit_try_catch/188 [ 22.818266] [ 22.818371] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT [ 22.818861] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.818937] Hardware name: linux,dummy-virt (DT) [ 22.819009] Call trace: [ 22.819074] show_stack+0x20/0x38 (C) [ 22.819218] dump_stack_lvl+0x8c/0xd0 [ 22.819350] print_report+0x118/0x608 [ 22.819480] kasan_report+0xdc/0x128 [ 22.819574] __asan_report_load1_noabort+0x20/0x30 [ 22.819671] kmalloc_uaf+0x300/0x338 [ 22.819765] kunit_try_run_case+0x170/0x3f0 [ 22.819877] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.820014] kthread+0x328/0x630 [ 22.820128] ret_from_fork+0x10/0x20 [ 22.820265] [ 22.820305] Allocated by task 188: [ 22.820377] kasan_save_stack+0x3c/0x68 [ 22.820515] kasan_save_track+0x20/0x40 [ 22.820600] kasan_save_alloc_info+0x40/0x58 [ 22.820694] __kasan_kmalloc+0xd4/0xd8 [ 22.820781] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.820908] kmalloc_uaf+0xb8/0x338 [ 22.821015] kunit_try_run_case+0x170/0x3f0 [ 22.821163] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.821329] kthread+0x328/0x630 [ 22.821471] ret_from_fork+0x10/0x20 [ 22.821608] [ 22.821665] Freed by task 188: [ 22.821727] kasan_save_stack+0x3c/0x68 [ 22.821836] kasan_save_track+0x20/0x40 [ 22.821935] kasan_save_free_info+0x4c/0x78 [ 22.822044] __kasan_slab_free+0x6c/0x98 [ 22.822181] kfree+0x214/0x3c8 [ 22.822277] kmalloc_uaf+0x11c/0x338 [ 22.822414] kunit_try_run_case+0x170/0x3f0 [ 22.822506] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.822670] kthread+0x328/0x630 [ 22.822756] ret_from_fork+0x10/0x20 [ 22.822848] [ 22.822901] The buggy address belongs to the object at fff00000c57223a0 [ 22.822901] which belongs to the cache kmalloc-16 of size 16 [ 22.823050] The buggy address is located 8 bytes inside of [ 22.823050] freed 16-byte region [fff00000c57223a0, fff00000c57223b0) [ 22.823203] [ 22.823281] The buggy address belongs to the physical page: [ 22.823377] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105722 [ 22.823531] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.823645] page_type: f5(slab) [ 22.823730] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 22.824084] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 22.824188] page dumped because: kasan: bad access detected [ 22.824268] [ 22.824316] Memory state around the buggy address: [ 22.824441] fff00000c5722280: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 22.824549] fff00000c5722300: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.824659] >fff00000c5722380: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 22.824767] ^ [ 22.824887] fff00000c5722400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.825051] fff00000c5722480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.825163] ==================================================================
[ 13.992320] ================================================================== [ 13.993104] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 13.993286] Read of size 1 at addr ffff8881026ac908 by task kunit_try_catch/204 [ 13.993420] [ 13.993499] CPU: 1 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT(voluntary) [ 13.993554] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.993592] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.993626] Call Trace: [ 13.993649] <TASK> [ 13.993683] dump_stack_lvl+0x73/0xb0 [ 13.993729] print_report+0xd1/0x650 [ 13.993777] ? __virt_addr_valid+0x1db/0x2d0 [ 13.993816] ? kmalloc_uaf+0x320/0x380 [ 13.993847] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.993882] ? kmalloc_uaf+0x320/0x380 [ 13.993913] kasan_report+0x141/0x180 [ 13.993947] ? kmalloc_uaf+0x320/0x380 [ 13.993983] __asan_report_load1_noabort+0x18/0x20 [ 13.994015] kmalloc_uaf+0x320/0x380 [ 13.994049] ? __pfx_kmalloc_uaf+0x10/0x10 [ 13.994087] ? __schedule+0x10cc/0x2b30 [ 13.994126] ? __pfx_read_tsc+0x10/0x10 [ 13.994165] ? ktime_get_ts64+0x86/0x230 [ 13.994215] kunit_try_run_case+0x1a5/0x480 [ 13.994265] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.994308] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.994354] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.994416] ? __kthread_parkme+0x82/0x180 [ 13.994454] ? preempt_count_sub+0x50/0x80 [ 13.994501] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.994543] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.994601] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.994645] kthread+0x337/0x6f0 [ 13.994681] ? trace_preempt_on+0x20/0xc0 [ 13.994731] ? __pfx_kthread+0x10/0x10 [ 13.994770] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.994808] ? calculate_sigpending+0x7b/0xa0 [ 13.994854] ? __pfx_kthread+0x10/0x10 [ 13.994886] ret_from_fork+0x41/0x80 [ 13.994928] ? __pfx_kthread+0x10/0x10 [ 13.994957] ret_from_fork_asm+0x1a/0x30 [ 13.995012] </TASK> [ 13.995036] [ 14.008115] Allocated by task 204: [ 14.008304] kasan_save_stack+0x45/0x70 [ 14.008475] kasan_save_track+0x18/0x40 [ 14.009293] kasan_save_alloc_info+0x3b/0x50 [ 14.009518] __kasan_kmalloc+0xb7/0xc0 [ 14.009745] __kmalloc_cache_noprof+0x189/0x420 [ 14.010314] kmalloc_uaf+0xaa/0x380 [ 14.011299] kunit_try_run_case+0x1a5/0x480 [ 14.011500] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.011775] kthread+0x337/0x6f0 [ 14.011979] ret_from_fork+0x41/0x80 [ 14.012267] ret_from_fork_asm+0x1a/0x30 [ 14.012500] [ 14.012664] Freed by task 204: [ 14.012887] kasan_save_stack+0x45/0x70 [ 14.013197] kasan_save_track+0x18/0x40 [ 14.013419] kasan_save_free_info+0x3f/0x60 [ 14.014326] __kasan_slab_free+0x56/0x70 [ 14.014511] kfree+0x222/0x3f0 [ 14.015127] kmalloc_uaf+0x12c/0x380 [ 14.015296] kunit_try_run_case+0x1a5/0x480 [ 14.015947] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.016432] kthread+0x337/0x6f0 [ 14.016604] ret_from_fork+0x41/0x80 [ 14.017225] ret_from_fork_asm+0x1a/0x30 [ 14.017397] [ 14.017908] The buggy address belongs to the object at ffff8881026ac900 [ 14.017908] which belongs to the cache kmalloc-16 of size 16 [ 14.018231] The buggy address is located 8 bytes inside of [ 14.018231] freed 16-byte region [ffff8881026ac900, ffff8881026ac910) [ 14.019144] [ 14.019239] The buggy address belongs to the physical page: [ 14.019423] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1026ac [ 14.020661] flags: 0x200000000000000(node=0|zone=2) [ 14.020973] page_type: f5(slab) [ 14.021122] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 14.021518] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 14.022024] page dumped because: kasan: bad access detected [ 14.022318] [ 14.022446] Memory state around the buggy address: [ 14.023275] ffff8881026ac800: 00 02 fc fc 00 02 fc fc 00 02 fc fc fa fb fc fc [ 14.024899] ffff8881026ac880: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 14.025454] >ffff8881026ac900: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.027087] ^ [ 14.027286] ffff8881026ac980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.027526] ffff8881026aca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.027767] ==================================================================