Date
June 20, 2025, 12:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.370146] ================================================================== [ 31.370338] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 31.370492] Read of size 1 at addr fff00000c767c000 by task kunit_try_catch/159 [ 31.370705] [ 31.370946] CPU: 1 UID: 0 PID: 159 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT [ 31.371587] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.371708] Hardware name: linux,dummy-virt (DT) [ 31.371799] Call trace: [ 31.371895] show_stack+0x20/0x38 (C) [ 31.372125] dump_stack_lvl+0x8c/0xd0 [ 31.372412] print_report+0x118/0x608 [ 31.372599] kasan_report+0xdc/0x128 [ 31.372696] __asan_report_load1_noabort+0x20/0x30 [ 31.373050] kmalloc_large_uaf+0x2cc/0x2f8 [ 31.373198] kunit_try_run_case+0x170/0x3f0 [ 31.373333] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.373635] kthread+0x328/0x630 [ 31.373759] ret_from_fork+0x10/0x20 [ 31.373967] [ 31.374057] The buggy address belongs to the physical page: [ 31.374220] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10767c [ 31.374681] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.374947] raw: 0bfffe0000000000 ffffc1ffc3181c08 fff00000da498c80 0000000000000000 [ 31.375231] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 31.375358] page dumped because: kasan: bad access detected [ 31.375873] [ 31.375934] Memory state around the buggy address: [ 31.376027] fff00000c767bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.376140] fff00000c767bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.376684] >fff00000c767c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.376873] ^ [ 31.377080] fff00000c767c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.377225] fff00000c767c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.377303] ==================================================================
[ 24.870215] ================================================================== [ 24.870946] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 24.871429] Read of size 1 at addr ffff8881038e0000 by task kunit_try_catch/177 [ 24.871830] [ 24.872232] CPU: 1 UID: 0 PID: 177 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT(voluntary) [ 24.872354] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.872379] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.872425] Call Trace: [ 24.872467] <TASK> [ 24.872501] dump_stack_lvl+0x73/0xb0 [ 24.872564] print_report+0xd1/0x650 [ 24.872607] ? __virt_addr_valid+0x1db/0x2d0 [ 24.872652] ? kmalloc_large_uaf+0x2f1/0x340 [ 24.872697] ? kasan_addr_to_slab+0x11/0xa0 [ 24.872738] ? kmalloc_large_uaf+0x2f1/0x340 [ 24.872782] kasan_report+0x141/0x180 [ 24.872830] ? kmalloc_large_uaf+0x2f1/0x340 [ 24.872886] __asan_report_load1_noabort+0x18/0x20 [ 24.872938] kmalloc_large_uaf+0x2f1/0x340 [ 24.872983] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 24.873157] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 24.873205] kunit_try_run_case+0x1a5/0x480 [ 24.873265] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.873324] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 24.873372] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.873414] ? __kthread_parkme+0x82/0x180 [ 24.873469] ? preempt_count_sub+0x50/0x80 [ 24.873529] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.873575] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.873625] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.873676] kthread+0x337/0x6f0 [ 24.873719] ? trace_preempt_on+0x20/0xc0 [ 24.873757] ? __pfx_kthread+0x10/0x10 [ 24.873779] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.873802] ? calculate_sigpending+0x7b/0xa0 [ 24.873827] ? __pfx_kthread+0x10/0x10 [ 24.873850] ret_from_fork+0x116/0x1d0 [ 24.873872] ? __pfx_kthread+0x10/0x10 [ 24.873894] ret_from_fork_asm+0x1a/0x30 [ 24.873927] </TASK> [ 24.873940] [ 24.884246] The buggy address belongs to the physical page: [ 24.884939] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038e0 [ 24.885852] flags: 0x200000000000000(node=0|zone=2) [ 24.886315] raw: 0200000000000000 ffffea00040e3908 ffff88815b139fc0 0000000000000000 [ 24.886657] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 24.886934] page dumped because: kasan: bad access detected [ 24.887422] [ 24.887744] Memory state around the buggy address: [ 24.888179] ffff8881038dff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.888888] ffff8881038dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.889470] >ffff8881038e0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.890276] ^ [ 24.890750] ffff8881038e0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.891244] ffff8881038e0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.891514] ==================================================================