Date
July 23, 2025, 3:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.174354] ================================================================== [ 31.174419] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 31.174472] Write of size 33 at addr fff00000c9a6f900 by task kunit_try_catch/219 [ 31.174672] [ 31.174718] CPU: 0 UID: 0 PID: 219 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250723 #1 PREEMPT [ 31.174809] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 31.175202] Hardware name: linux,dummy-virt (DT) [ 31.175258] Call trace: [ 31.175303] show_stack+0x20/0x38 (C) [ 31.175357] dump_stack_lvl+0x8c/0xd0 [ 31.175403] print_report+0x118/0x5e8 [ 31.175448] kasan_report+0xdc/0x128 [ 31.175564] kasan_check_range+0x100/0x1a8 [ 31.175641] __asan_memset+0x34/0x78 [ 31.175687] kmalloc_uaf_memset+0x170/0x310 [ 31.175826] kunit_try_run_case+0x170/0x3f0 [ 31.175894] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.175965] kthread+0x328/0x630 [ 31.176157] ret_from_fork+0x10/0x20 [ 31.176346] [ 31.176373] Allocated by task 219: [ 31.176479] kasan_save_stack+0x3c/0x68 [ 31.176541] kasan_save_track+0x20/0x40 [ 31.176617] kasan_save_alloc_info+0x40/0x58 [ 31.176735] __kasan_kmalloc+0xd4/0xd8 [ 31.176768] __kmalloc_cache_noprof+0x16c/0x3c0 [ 31.177089] kmalloc_uaf_memset+0xb8/0x310 [ 31.177320] kunit_try_run_case+0x170/0x3f0 [ 31.177539] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.177616] kthread+0x328/0x630 [ 31.177766] ret_from_fork+0x10/0x20 [ 31.177850] [ 31.177875] Freed by task 219: [ 31.178212] kasan_save_stack+0x3c/0x68 [ 31.178283] kasan_save_track+0x20/0x40 [ 31.178397] kasan_save_free_info+0x4c/0x78 [ 31.178478] __kasan_slab_free+0x6c/0x98 [ 31.178565] kfree+0x214/0x3c8 [ 31.178678] kmalloc_uaf_memset+0x11c/0x310 [ 31.178767] kunit_try_run_case+0x170/0x3f0 [ 31.178824] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.179187] kthread+0x328/0x630 [ 31.179252] ret_from_fork+0x10/0x20 [ 31.179360] [ 31.179420] The buggy address belongs to the object at fff00000c9a6f900 [ 31.179420] which belongs to the cache kmalloc-64 of size 64 [ 31.179529] The buggy address is located 0 bytes inside of [ 31.179529] freed 64-byte region [fff00000c9a6f900, fff00000c9a6f940) [ 31.179698] [ 31.179756] The buggy address belongs to the physical page: [ 31.179792] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a6f [ 31.180010] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.180193] page_type: f5(slab) [ 31.180277] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 31.180379] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 31.180478] page dumped because: kasan: bad access detected [ 31.180533] [ 31.180644] Memory state around the buggy address: [ 31.180704] fff00000c9a6f800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.180768] fff00000c9a6f880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.180816] >fff00000c9a6f900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.180854] ^ [ 31.181070] fff00000c9a6f980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.181259] fff00000c9a6fa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.181332] ==================================================================
[ 25.457713] ================================================================== [ 25.458523] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 25.458940] Write of size 33 at addr ffff8881055e7000 by task kunit_try_catch/235 [ 25.459460] [ 25.459567] CPU: 1 UID: 0 PID: 235 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250723 #1 PREEMPT(voluntary) [ 25.459628] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.459641] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.459663] Call Trace: [ 25.459676] <TASK> [ 25.459694] dump_stack_lvl+0x73/0xb0 [ 25.459725] print_report+0xd1/0x640 [ 25.459749] ? __virt_addr_valid+0x1db/0x2d0 [ 25.459774] ? kmalloc_uaf_memset+0x1a3/0x360 [ 25.459795] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.459820] ? kmalloc_uaf_memset+0x1a3/0x360 [ 25.459841] kasan_report+0x141/0x180 [ 25.459863] ? kmalloc_uaf_memset+0x1a3/0x360 [ 25.459888] kasan_check_range+0x10c/0x1c0 [ 25.459911] __asan_memset+0x27/0x50 [ 25.459935] kmalloc_uaf_memset+0x1a3/0x360 [ 25.460166] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 25.460191] ? __schedule+0x10da/0x2b60 [ 25.460217] ? __pfx_read_tsc+0x10/0x10 [ 25.460240] ? ktime_get_ts64+0x86/0x230 [ 25.460265] kunit_try_run_case+0x1a5/0x480 [ 25.460290] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.460312] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.460337] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.460361] ? __kthread_parkme+0x82/0x180 [ 25.460383] ? preempt_count_sub+0x50/0x80 [ 25.460406] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.460503] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.460530] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.460553] kthread+0x337/0x6f0 [ 25.460574] ? trace_preempt_on+0x20/0xc0 [ 25.460598] ? __pfx_kthread+0x10/0x10 [ 25.460619] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.460642] ? calculate_sigpending+0x7b/0xa0 [ 25.460666] ? __pfx_kthread+0x10/0x10 [ 25.460687] ret_from_fork+0x116/0x1d0 [ 25.460707] ? __pfx_kthread+0x10/0x10 [ 25.460728] ret_from_fork_asm+0x1a/0x30 [ 25.460759] </TASK> [ 25.460770] [ 25.474643] Allocated by task 235: [ 25.474855] kasan_save_stack+0x45/0x70 [ 25.475169] kasan_save_track+0x18/0x40 [ 25.475548] kasan_save_alloc_info+0x3b/0x50 [ 25.476175] __kasan_kmalloc+0xb7/0xc0 [ 25.476320] __kmalloc_cache_noprof+0x189/0x420 [ 25.476513] kmalloc_uaf_memset+0xa9/0x360 [ 25.476923] kunit_try_run_case+0x1a5/0x480 [ 25.477302] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.477869] kthread+0x337/0x6f0 [ 25.478227] ret_from_fork+0x116/0x1d0 [ 25.478572] ret_from_fork_asm+0x1a/0x30 [ 25.478832] [ 25.478901] Freed by task 235: [ 25.479131] kasan_save_stack+0x45/0x70 [ 25.479471] kasan_save_track+0x18/0x40 [ 25.479950] kasan_save_free_info+0x3f/0x60 [ 25.480258] __kasan_slab_free+0x56/0x70 [ 25.480414] kfree+0x222/0x3f0 [ 25.480758] kmalloc_uaf_memset+0x12b/0x360 [ 25.481189] kunit_try_run_case+0x1a5/0x480 [ 25.481606] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.481860] kthread+0x337/0x6f0 [ 25.482041] ret_from_fork+0x116/0x1d0 [ 25.482386] ret_from_fork_asm+0x1a/0x30 [ 25.482786] [ 25.482948] The buggy address belongs to the object at ffff8881055e7000 [ 25.482948] which belongs to the cache kmalloc-64 of size 64 [ 25.483784] The buggy address is located 0 bytes inside of [ 25.483784] freed 64-byte region [ffff8881055e7000, ffff8881055e7040) [ 25.484862] [ 25.484937] The buggy address belongs to the physical page: [ 25.485114] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1055e7 [ 25.485365] flags: 0x200000000000000(node=0|zone=2) [ 25.485859] page_type: f5(slab) [ 25.486169] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 25.486997] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 25.487878] page dumped because: kasan: bad access detected [ 25.488407] [ 25.488562] Memory state around the buggy address: [ 25.489021] ffff8881055e6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.489249] ffff8881055e6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.489674] >ffff8881055e7000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.490298] ^ [ 25.490630] ffff8881055e7080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.491318] ffff8881055e7100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.492015] ==================================================================