Date
July 3, 2025, 3:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.699220] ================================================================== [ 15.699279] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 15.699334] Read of size 1 at addr fff00000c55f0928 by task kunit_try_catch/187 [ 15.699382] [ 15.699413] CPU: 1 UID: 0 PID: 187 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc1 #1 PREEMPT [ 15.699493] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.699520] Hardware name: linux,dummy-virt (DT) [ 15.699548] Call trace: [ 15.699571] show_stack+0x20/0x38 (C) [ 15.699616] dump_stack_lvl+0x8c/0xd0 [ 15.699667] print_report+0x118/0x608 [ 15.699747] kasan_report+0xdc/0x128 [ 15.699792] __asan_report_load1_noabort+0x20/0x30 [ 15.699839] kmalloc_uaf+0x300/0x338 [ 15.699883] kunit_try_run_case+0x170/0x3f0 [ 15.699931] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.701031] kthread+0x328/0x630 [ 15.701492] ret_from_fork+0x10/0x20 [ 15.701875] [ 15.702059] Allocated by task 187: [ 15.702144] kasan_save_stack+0x3c/0x68 [ 15.702214] kasan_save_track+0x20/0x40 [ 15.702249] kasan_save_alloc_info+0x40/0x58 [ 15.702540] __kasan_kmalloc+0xd4/0xd8 [ 15.702734] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.702812] kmalloc_uaf+0xb8/0x338 [ 15.703010] kunit_try_run_case+0x170/0x3f0 [ 15.703060] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.703206] kthread+0x328/0x630 [ 15.703532] ret_from_fork+0x10/0x20 [ 15.703681] [ 15.703840] Freed by task 187: [ 15.704030] kasan_save_stack+0x3c/0x68 [ 15.704256] kasan_save_track+0x20/0x40 [ 15.704440] kasan_save_free_info+0x4c/0x78 [ 15.704917] __kasan_slab_free+0x6c/0x98 [ 15.705054] kfree+0x214/0x3c8 [ 15.705092] kmalloc_uaf+0x11c/0x338 [ 15.705185] kunit_try_run_case+0x170/0x3f0 [ 15.705633] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.705968] kthread+0x328/0x630 [ 15.706182] ret_from_fork+0x10/0x20 [ 15.706226] [ 15.706410] The buggy address belongs to the object at fff00000c55f0920 [ 15.706410] which belongs to the cache kmalloc-16 of size 16 [ 15.706628] The buggy address is located 8 bytes inside of [ 15.706628] freed 16-byte region [fff00000c55f0920, fff00000c55f0930) [ 15.706743] [ 15.706874] The buggy address belongs to the physical page: [ 15.706909] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1055f0 [ 15.707099] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.707339] page_type: f5(slab) [ 15.707397] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.707447] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.707876] page dumped because: kasan: bad access detected [ 15.708054] [ 15.708258] Memory state around the buggy address: [ 15.708320] fff00000c55f0800: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.708479] fff00000c55f0880: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.708631] >fff00000c55f0900: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 15.708715] ^ [ 15.708902] fff00000c55f0980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.709138] fff00000c55f0a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.709209] ==================================================================
[ 11.427277] ================================================================== [ 11.427713] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 11.428397] Read of size 1 at addr ffff888102307de8 by task kunit_try_catch/203 [ 11.429251] [ 11.429507] CPU: 1 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc1 #1 PREEMPT(voluntary) [ 11.429557] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.429569] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.429590] Call Trace: [ 11.429602] <TASK> [ 11.429616] dump_stack_lvl+0x73/0xb0 [ 11.429640] print_report+0xd1/0x650 [ 11.429701] ? __virt_addr_valid+0x1db/0x2d0 [ 11.429723] ? kmalloc_uaf+0x320/0x380 [ 11.429743] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.429772] ? kmalloc_uaf+0x320/0x380 [ 11.429793] kasan_report+0x141/0x180 [ 11.429815] ? kmalloc_uaf+0x320/0x380 [ 11.429840] __asan_report_load1_noabort+0x18/0x20 [ 11.429861] kmalloc_uaf+0x320/0x380 [ 11.429881] ? __pfx_kmalloc_uaf+0x10/0x10 [ 11.429902] ? __schedule+0x10cc/0x2b60 [ 11.429924] ? __pfx_read_tsc+0x10/0x10 [ 11.429943] ? ktime_get_ts64+0x86/0x230 [ 11.429967] kunit_try_run_case+0x1a5/0x480 [ 11.429991] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.430012] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.430036] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.430059] ? __kthread_parkme+0x82/0x180 [ 11.430080] ? preempt_count_sub+0x50/0x80 [ 11.430104] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.430127] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.430150] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.430173] kthread+0x337/0x6f0 [ 11.430189] ? trace_preempt_on+0x20/0xc0 [ 11.430212] ? __pfx_kthread+0x10/0x10 [ 11.430229] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.430260] ? calculate_sigpending+0x7b/0xa0 [ 11.430281] ? __pfx_kthread+0x10/0x10 [ 11.430300] ret_from_fork+0x41/0x80 [ 11.430319] ? __pfx_kthread+0x10/0x10 [ 11.430337] ret_from_fork_asm+0x1a/0x30 [ 11.430366] </TASK> [ 11.430376] [ 11.442166] Allocated by task 203: [ 11.442571] kasan_save_stack+0x45/0x70 [ 11.442990] kasan_save_track+0x18/0x40 [ 11.443443] kasan_save_alloc_info+0x3b/0x50 [ 11.443895] __kasan_kmalloc+0xb7/0xc0 [ 11.444286] __kmalloc_cache_noprof+0x189/0x420 [ 11.444750] kmalloc_uaf+0xaa/0x380 [ 11.445084] kunit_try_run_case+0x1a5/0x480 [ 11.445549] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.446061] kthread+0x337/0x6f0 [ 11.446430] ret_from_fork+0x41/0x80 [ 11.446828] ret_from_fork_asm+0x1a/0x30 [ 11.447197] [ 11.447408] Freed by task 203: [ 11.447637] kasan_save_stack+0x45/0x70 [ 11.447966] kasan_save_track+0x18/0x40 [ 11.448098] kasan_save_free_info+0x3f/0x60 [ 11.448247] __kasan_slab_free+0x56/0x70 [ 11.448382] kfree+0x222/0x3f0 [ 11.448716] kmalloc_uaf+0x12c/0x380 [ 11.449089] kunit_try_run_case+0x1a5/0x480 [ 11.449629] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.450305] kthread+0x337/0x6f0 [ 11.450615] ret_from_fork+0x41/0x80 [ 11.451041] ret_from_fork_asm+0x1a/0x30 [ 11.451508] [ 11.451747] The buggy address belongs to the object at ffff888102307de0 [ 11.451747] which belongs to the cache kmalloc-16 of size 16 [ 11.452336] The buggy address is located 8 bytes inside of [ 11.452336] freed 16-byte region [ffff888102307de0, ffff888102307df0) [ 11.453073] [ 11.453290] The buggy address belongs to the physical page: [ 11.453827] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102307 [ 11.454602] flags: 0x200000000000000(node=0|zone=2) [ 11.455069] page_type: f5(slab) [ 11.455389] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.455615] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.456392] page dumped because: kasan: bad access detected [ 11.456898] [ 11.457054] Memory state around the buggy address: [ 11.457564] ffff888102307c80: 00 02 fc fc 00 06 fc fc 00 06 fc fc 00 04 fc fc [ 11.457787] ffff888102307d00: 00 04 fc fc 00 01 fc fc 00 01 fc fc 00 04 fc fc [ 11.457996] >ffff888102307d80: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.458210] ^ [ 11.458892] ffff888102307e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.459781] ffff888102307e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.460511] ==================================================================