Date
July 8, 2025, 4:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.930752] ================================================================== [ 17.930824] BUG: KASAN: out-of-bounds in kmalloc_memmove_negative_size+0x154/0x2e0 [ 17.931012] Read of size 18446744073709551614 at addr fff00000c63d1f04 by task kunit_try_catch/182 [ 17.931287] [ 17.931668] CPU: 1 UID: 0 PID: 182 Comm: kunit_try_catch Tainted: G B N 6.15.6-rc1 #1 PREEMPT [ 17.931909] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.932161] Hardware name: linux,dummy-virt (DT) [ 17.932192] Call trace: [ 17.932215] show_stack+0x20/0x38 (C) [ 17.932269] dump_stack_lvl+0x8c/0xd0 [ 17.933100] print_report+0x118/0x608 [ 17.933303] kasan_report+0xdc/0x128 [ 17.933405] kasan_check_range+0x100/0x1a8 [ 17.933580] __asan_memmove+0x3c/0x98 [ 17.933661] kmalloc_memmove_negative_size+0x154/0x2e0 [ 17.933722] kunit_try_run_case+0x170/0x3f0 [ 17.933770] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.933918] kthread+0x328/0x630 [ 17.934169] ret_from_fork+0x10/0x20 [ 17.934472] [ 17.934987] Allocated by task 182: [ 17.935281] kasan_save_stack+0x3c/0x68 [ 17.935376] kasan_save_track+0x20/0x40 [ 17.935650] kasan_save_alloc_info+0x40/0x58 [ 17.935825] __kasan_kmalloc+0xd4/0xd8 [ 17.935865] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.935905] kmalloc_memmove_negative_size+0xb0/0x2e0 [ 17.935967] kunit_try_run_case+0x170/0x3f0 [ 17.936365] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.936414] kthread+0x328/0x630 [ 17.936580] ret_from_fork+0x10/0x20 [ 17.936625] [ 17.936780] The buggy address belongs to the object at fff00000c63d1f00 [ 17.936780] which belongs to the cache kmalloc-64 of size 64 [ 17.936901] The buggy address is located 4 bytes inside of [ 17.936901] 64-byte region [fff00000c63d1f00, fff00000c63d1f40) [ 17.936962] [ 17.937176] The buggy address belongs to the physical page: [ 17.937218] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1063d1 [ 17.937274] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.937536] page_type: f5(slab) [ 17.937722] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 17.937843] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 17.938183] page dumped because: kasan: bad access detected [ 17.938297] [ 17.938316] Memory state around the buggy address: [ 17.938359] fff00000c63d1e00: 00 00 00 00 01 fc fc fc fc fc fc fc fc fc fc fc [ 17.938405] fff00000c63d1e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 17.938654] >fff00000c63d1f00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 17.938707] ^ [ 17.938736] fff00000c63d1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.938896] fff00000c63d2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.938942] ==================================================================
[ 11.458916] ================================================================== [ 11.459710] BUG: KASAN: out-of-bounds in kmalloc_memmove_negative_size+0x171/0x330 [ 11.460364] Read of size 18446744073709551614 at addr ffff8881029cff84 by task kunit_try_catch/200 [ 11.460912] [ 11.461017] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.15.6-rc1 #1 PREEMPT(voluntary) [ 11.461062] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.461074] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.461096] Call Trace: [ 11.461108] <TASK> [ 11.461123] dump_stack_lvl+0x73/0xb0 [ 11.461149] print_report+0xd1/0x650 [ 11.461173] ? __virt_addr_valid+0x1db/0x2d0 [ 11.461195] ? kmalloc_memmove_negative_size+0x171/0x330 [ 11.461250] ? kasan_complete_mode_report_info+0x2a/0x200 [ 11.461274] ? kmalloc_memmove_negative_size+0x171/0x330 [ 11.461316] kasan_report+0x141/0x180 [ 11.461341] ? kmalloc_memmove_negative_size+0x171/0x330 [ 11.461368] kasan_check_range+0x10c/0x1c0 [ 11.461388] __asan_memmove+0x27/0x70 [ 11.461409] kmalloc_memmove_negative_size+0x171/0x330 [ 11.461431] ? __pfx_kmalloc_memmove_negative_size+0x10/0x10 [ 11.461453] ? __schedule+0x10cc/0x2b60 [ 11.461476] ? __pfx_read_tsc+0x10/0x10 [ 11.461496] ? ktime_get_ts64+0x86/0x230 [ 11.461539] kunit_try_run_case+0x1a5/0x480 [ 11.461561] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.461580] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.461604] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.461628] ? __kthread_parkme+0x82/0x180 [ 11.461650] ? preempt_count_sub+0x50/0x80 [ 11.461674] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.461694] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.461717] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.461740] kthread+0x337/0x6f0 [ 11.461757] ? trace_preempt_on+0x20/0xc0 [ 11.461781] ? __pfx_kthread+0x10/0x10 [ 11.461799] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.461821] ? calculate_sigpending+0x7b/0xa0 [ 11.461857] ? __pfx_kthread+0x10/0x10 [ 11.461887] ret_from_fork+0x41/0x80 [ 11.461908] ? __pfx_kthread+0x10/0x10 [ 11.461926] ret_from_fork_asm+0x1a/0x30 [ 11.461957] </TASK> [ 11.461968] [ 11.474299] Allocated by task 200: [ 11.474486] kasan_save_stack+0x45/0x70 [ 11.474693] kasan_save_track+0x18/0x40 [ 11.475084] kasan_save_alloc_info+0x3b/0x50 [ 11.475401] __kasan_kmalloc+0xb7/0xc0 [ 11.475771] __kmalloc_cache_noprof+0x189/0x420 [ 11.476020] kmalloc_memmove_negative_size+0xac/0x330 [ 11.476250] kunit_try_run_case+0x1a5/0x480 [ 11.476443] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.477093] kthread+0x337/0x6f0 [ 11.477391] ret_from_fork+0x41/0x80 [ 11.477799] ret_from_fork_asm+0x1a/0x30 [ 11.478253] [ 11.478488] The buggy address belongs to the object at ffff8881029cff80 [ 11.478488] which belongs to the cache kmalloc-64 of size 64 [ 11.479702] The buggy address is located 4 bytes inside of [ 11.479702] 64-byte region [ffff8881029cff80, ffff8881029cffc0) [ 11.480635] [ 11.480894] The buggy address belongs to the physical page: [ 11.481187] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029cf [ 11.481717] flags: 0x200000000000000(node=0|zone=2) [ 11.482187] page_type: f5(slab) [ 11.482435] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.482998] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.483322] page dumped because: kasan: bad access detected [ 11.483684] [ 11.483773] Memory state around the buggy address: [ 11.484200] ffff8881029cfe80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.484641] ffff8881029cff00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.485068] >ffff8881029cff80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 11.485627] ^ [ 11.485794] ffff8881029d0000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 11.486215] ffff8881029d0080: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 11.486662] ==================================================================