Date
July 24, 2025, 4:41 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.633761] ================================================================== [ 32.633845] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 32.634341] Read of size 1 at addr fff00000c86834e8 by task kunit_try_catch/215 [ 32.634460] [ 32.634503] CPU: 0 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250724 #1 PREEMPT [ 32.634773] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.634856] Hardware name: linux,dummy-virt (DT) [ 32.634891] Call trace: [ 32.635072] show_stack+0x20/0x38 (C) [ 32.635159] dump_stack_lvl+0x8c/0xd0 [ 32.635324] print_report+0x118/0x5e8 [ 32.635424] kasan_report+0xdc/0x128 [ 32.635487] __asan_report_load1_noabort+0x20/0x30 [ 32.635703] kmalloc_uaf+0x300/0x338 [ 32.635965] kunit_try_run_case+0x170/0x3f0 [ 32.636475] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.636569] kthread+0x328/0x630 [ 32.636786] ret_from_fork+0x10/0x20 [ 32.637043] [ 32.637112] Allocated by task 215: [ 32.637241] kasan_save_stack+0x3c/0x68 [ 32.637334] kasan_save_track+0x20/0x40 [ 32.637404] kasan_save_alloc_info+0x40/0x58 [ 32.637538] __kasan_kmalloc+0xd4/0xd8 [ 32.637576] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.637805] kmalloc_uaf+0xb8/0x338 [ 32.638050] kunit_try_run_case+0x170/0x3f0 [ 32.638097] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.638144] kthread+0x328/0x630 [ 32.638240] ret_from_fork+0x10/0x20 [ 32.638287] [ 32.638315] Freed by task 215: [ 32.638344] kasan_save_stack+0x3c/0x68 [ 32.638381] kasan_save_track+0x20/0x40 [ 32.638424] kasan_save_free_info+0x4c/0x78 [ 32.638467] __kasan_slab_free+0x6c/0x98 [ 32.638504] kfree+0x214/0x3c8 [ 32.638544] kmalloc_uaf+0x11c/0x338 [ 32.638579] kunit_try_run_case+0x170/0x3f0 [ 32.638623] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.638666] kthread+0x328/0x630 [ 32.638699] ret_from_fork+0x10/0x20 [ 32.638742] [ 32.638961] The buggy address belongs to the object at fff00000c86834e0 [ 32.638961] which belongs to the cache kmalloc-16 of size 16 [ 32.639233] The buggy address is located 8 bytes inside of [ 32.639233] freed 16-byte region [fff00000c86834e0, fff00000c86834f0) [ 32.639343] [ 32.639387] The buggy address belongs to the physical page: [ 32.639619] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x108683 [ 32.639839] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.639946] page_type: f5(slab) [ 32.640087] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 32.640196] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 32.640240] page dumped because: kasan: bad access detected [ 32.640443] [ 32.640684] Memory state around the buggy address: [ 32.640821] fff00000c8683380: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.640936] fff00000c8683400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.641012] >fff00000c8683480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.641173] ^ [ 32.641237] fff00000c8683500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.641506] fff00000c8683580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.641810] ==================================================================
[ 27.097836] ================================================================== [ 27.098593] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 27.099227] Read of size 1 at addr ffff888105424ac8 by task kunit_try_catch/232 [ 27.099603] [ 27.099709] CPU: 0 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) [ 27.099761] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 27.099774] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.099797] Call Trace: [ 27.099809] <TASK> [ 27.099913] dump_stack_lvl+0x73/0xb0 [ 27.099950] print_report+0xd1/0x640 [ 27.099974] ? __virt_addr_valid+0x1db/0x2d0 [ 27.099999] ? kmalloc_uaf+0x320/0x380 [ 27.100040] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.100079] ? kmalloc_uaf+0x320/0x380 [ 27.100099] kasan_report+0x141/0x180 [ 27.100121] ? kmalloc_uaf+0x320/0x380 [ 27.100146] __asan_report_load1_noabort+0x18/0x20 [ 27.100170] kmalloc_uaf+0x320/0x380 [ 27.100190] ? __pfx_kmalloc_uaf+0x10/0x10 [ 27.100210] ? __schedule+0x10da/0x2b60 [ 27.100236] ? __pfx_read_tsc+0x10/0x10 [ 27.100257] ? ktime_get_ts64+0x86/0x230 [ 27.100283] kunit_try_run_case+0x1a5/0x480 [ 27.100308] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.100330] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.100355] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.100380] ? __kthread_parkme+0x82/0x180 [ 27.100400] ? preempt_count_sub+0x50/0x80 [ 27.100424] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.100447] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.100470] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.100492] kthread+0x337/0x6f0 [ 27.100513] ? trace_preempt_on+0x20/0xc0 [ 27.100536] ? __pfx_kthread+0x10/0x10 [ 27.100556] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.100590] ? calculate_sigpending+0x7b/0xa0 [ 27.100613] ? __pfx_kthread+0x10/0x10 [ 27.100634] ret_from_fork+0x116/0x1d0 [ 27.100654] ? __pfx_kthread+0x10/0x10 [ 27.100674] ret_from_fork_asm+0x1a/0x30 [ 27.100705] </TASK> [ 27.100716] [ 27.108172] Allocated by task 232: [ 27.108308] kasan_save_stack+0x45/0x70 [ 27.108471] kasan_save_track+0x18/0x40 [ 27.108673] kasan_save_alloc_info+0x3b/0x50 [ 27.109059] __kasan_kmalloc+0xb7/0xc0 [ 27.109236] __kmalloc_cache_noprof+0x189/0x420 [ 27.109455] kmalloc_uaf+0xaa/0x380 [ 27.109636] kunit_try_run_case+0x1a5/0x480 [ 27.109841] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.110311] kthread+0x337/0x6f0 [ 27.110462] ret_from_fork+0x116/0x1d0 [ 27.110598] ret_from_fork_asm+0x1a/0x30 [ 27.110845] [ 27.110964] Freed by task 232: [ 27.111113] kasan_save_stack+0x45/0x70 [ 27.111303] kasan_save_track+0x18/0x40 [ 27.111498] kasan_save_free_info+0x3f/0x60 [ 27.111663] __kasan_slab_free+0x56/0x70 [ 27.111961] kfree+0x222/0x3f0 [ 27.112103] kmalloc_uaf+0x12c/0x380 [ 27.112277] kunit_try_run_case+0x1a5/0x480 [ 27.112441] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.112727] kthread+0x337/0x6f0 [ 27.112911] ret_from_fork+0x116/0x1d0 [ 27.113066] ret_from_fork_asm+0x1a/0x30 [ 27.113194] [ 27.113284] The buggy address belongs to the object at ffff888105424ac0 [ 27.113284] which belongs to the cache kmalloc-16 of size 16 [ 27.114177] The buggy address is located 8 bytes inside of [ 27.114177] freed 16-byte region [ffff888105424ac0, ffff888105424ad0) [ 27.114748] [ 27.114850] The buggy address belongs to the physical page: [ 27.115129] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105424 [ 27.115476] flags: 0x200000000000000(node=0|zone=2) [ 27.115735] page_type: f5(slab) [ 27.115898] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 27.116222] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 27.116743] page dumped because: kasan: bad access detected [ 27.116981] [ 27.117061] Memory state around the buggy address: [ 27.117205] ffff888105424980: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 27.117401] ffff888105424a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 27.117610] >ffff888105424a80: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 27.117812] ^ [ 27.118329] ffff888105424b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.118649] ffff888105424b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.119294] ==================================================================