Date
July 23, 2025, 2:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.655916] ================================================================== [ 15.655979] BUG: KASAN: slab-use-after-free in ksize_uaf+0x168/0x5f8 [ 15.656465] Read of size 1 at addr fff00000c3f39a00 by task kunit_try_catch/196 [ 15.656628] [ 15.656662] CPU: 1 UID: 0 PID: 196 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 15.656992] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.657064] Hardware name: linux,dummy-virt (DT) [ 15.657101] Call trace: [ 15.657145] show_stack+0x20/0x38 (C) [ 15.657292] dump_stack_lvl+0x8c/0xd0 [ 15.657345] print_report+0x118/0x5d0 [ 15.657433] kasan_report+0xdc/0x128 [ 15.657498] __kasan_check_byte+0x54/0x70 [ 15.657985] ksize+0x30/0x88 [ 15.658101] ksize_uaf+0x168/0x5f8 [ 15.658190] kunit_try_run_case+0x170/0x3f0 [ 15.658245] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.658360] kthread+0x328/0x630 [ 15.658428] ret_from_fork+0x10/0x20 [ 15.658489] [ 15.658507] Allocated by task 196: [ 15.658677] kasan_save_stack+0x3c/0x68 [ 15.659015] kasan_save_track+0x20/0x40 [ 15.659107] kasan_save_alloc_info+0x40/0x58 [ 15.659222] __kasan_kmalloc+0xd4/0xd8 [ 15.659265] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.659304] ksize_uaf+0xb8/0x5f8 [ 15.659475] kunit_try_run_case+0x170/0x3f0 [ 15.659648] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.659722] kthread+0x328/0x630 [ 15.659889] ret_from_fork+0x10/0x20 [ 15.659987] [ 15.660098] Freed by task 196: [ 15.660176] kasan_save_stack+0x3c/0x68 [ 15.660266] kasan_save_track+0x20/0x40 [ 15.660307] kasan_save_free_info+0x4c/0x78 [ 15.660581] __kasan_slab_free+0x6c/0x98 [ 15.660843] kfree+0x214/0x3c8 [ 15.661028] ksize_uaf+0x11c/0x5f8 [ 15.661127] kunit_try_run_case+0x170/0x3f0 [ 15.661224] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.661271] kthread+0x328/0x630 [ 15.661304] ret_from_fork+0x10/0x20 [ 15.661341] [ 15.661361] The buggy address belongs to the object at fff00000c3f39a00 [ 15.661361] which belongs to the cache kmalloc-128 of size 128 [ 15.661447] The buggy address is located 0 bytes inside of [ 15.661447] freed 128-byte region [fff00000c3f39a00, fff00000c3f39a80) [ 15.661541] [ 15.661570] The buggy address belongs to the physical page: [ 15.661617] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f39 [ 15.661672] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.661722] page_type: f5(slab) [ 15.661771] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 15.661822] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 15.661884] page dumped because: kasan: bad access detected [ 15.661940] [ 15.661959] Memory state around the buggy address: [ 15.661991] fff00000c3f39900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.662036] fff00000c3f39980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.662091] >fff00000c3f39a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.662131] ^ [ 15.662157] fff00000c3f39a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.662200] fff00000c3f39b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.662242] ================================================================== [ 15.677460] ================================================================== [ 15.677519] BUG: KASAN: slab-use-after-free in ksize_uaf+0x544/0x5f8 [ 15.677719] Read of size 1 at addr fff00000c3f39a78 by task kunit_try_catch/196 [ 15.677774] [ 15.677805] CPU: 1 UID: 0 PID: 196 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 15.678042] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.678082] Hardware name: linux,dummy-virt (DT) [ 15.678134] Call trace: [ 15.678157] show_stack+0x20/0x38 (C) [ 15.678206] dump_stack_lvl+0x8c/0xd0 [ 15.678253] print_report+0x118/0x5d0 [ 15.678297] kasan_report+0xdc/0x128 [ 15.678342] __asan_report_load1_noabort+0x20/0x30 [ 15.678393] ksize_uaf+0x544/0x5f8 [ 15.678443] kunit_try_run_case+0x170/0x3f0 [ 15.678491] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.678782] kthread+0x328/0x630 [ 15.678887] ret_from_fork+0x10/0x20 [ 15.679487] [ 15.679716] Allocated by task 196: [ 15.679783] kasan_save_stack+0x3c/0x68 [ 15.679915] kasan_save_track+0x20/0x40 [ 15.680015] kasan_save_alloc_info+0x40/0x58 [ 15.680092] __kasan_kmalloc+0xd4/0xd8 [ 15.680239] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.680324] ksize_uaf+0xb8/0x5f8 [ 15.680525] kunit_try_run_case+0x170/0x3f0 [ 15.680929] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.681035] kthread+0x328/0x630 [ 15.681367] ret_from_fork+0x10/0x20 [ 15.681562] [ 15.681719] Freed by task 196: [ 15.681909] kasan_save_stack+0x3c/0x68 [ 15.681984] kasan_save_track+0x20/0x40 [ 15.682023] kasan_save_free_info+0x4c/0x78 [ 15.682276] __kasan_slab_free+0x6c/0x98 [ 15.682464] kfree+0x214/0x3c8 [ 15.682642] ksize_uaf+0x11c/0x5f8 [ 15.682738] kunit_try_run_case+0x170/0x3f0 [ 15.682860] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.682946] kthread+0x328/0x630 [ 15.683359] ret_from_fork+0x10/0x20 [ 15.683429] [ 15.683506] The buggy address belongs to the object at fff00000c3f39a00 [ 15.683506] which belongs to the cache kmalloc-128 of size 128 [ 15.683610] The buggy address is located 120 bytes inside of [ 15.683610] freed 128-byte region [fff00000c3f39a00, fff00000c3f39a80) [ 15.683750] [ 15.683876] The buggy address belongs to the physical page: [ 15.684009] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f39 [ 15.684284] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.684512] page_type: f5(slab) [ 15.684597] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 15.684779] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 15.684865] page dumped because: kasan: bad access detected [ 15.684972] [ 15.684994] Memory state around the buggy address: [ 15.685058] fff00000c3f39900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.685122] fff00000c3f39980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.685429] >fff00000c3f39a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.685704] ^ [ 15.685910] fff00000c3f39a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.686001] fff00000c3f39b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.686219] ================================================================== [ 15.665017] ================================================================== [ 15.665143] BUG: KASAN: slab-use-after-free in ksize_uaf+0x598/0x5f8 [ 15.665195] Read of size 1 at addr fff00000c3f39a00 by task kunit_try_catch/196 [ 15.665249] [ 15.665278] CPU: 1 UID: 0 PID: 196 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 15.665361] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.666035] Hardware name: linux,dummy-virt (DT) [ 15.666287] Call trace: [ 15.666324] show_stack+0x20/0x38 (C) [ 15.666567] dump_stack_lvl+0x8c/0xd0 [ 15.666652] print_report+0x118/0x5d0 [ 15.666698] kasan_report+0xdc/0x128 [ 15.666940] __asan_report_load1_noabort+0x20/0x30 [ 15.667128] ksize_uaf+0x598/0x5f8 [ 15.667181] kunit_try_run_case+0x170/0x3f0 [ 15.667541] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.667806] kthread+0x328/0x630 [ 15.668018] ret_from_fork+0x10/0x20 [ 15.668153] [ 15.668246] Allocated by task 196: [ 15.668277] kasan_save_stack+0x3c/0x68 [ 15.668522] kasan_save_track+0x20/0x40 [ 15.668631] kasan_save_alloc_info+0x40/0x58 [ 15.668844] __kasan_kmalloc+0xd4/0xd8 [ 15.668937] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.669230] ksize_uaf+0xb8/0x5f8 [ 15.669316] kunit_try_run_case+0x170/0x3f0 [ 15.669360] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.669918] kthread+0x328/0x630 [ 15.670011] ret_from_fork+0x10/0x20 [ 15.670372] [ 15.670529] Freed by task 196: [ 15.670562] kasan_save_stack+0x3c/0x68 [ 15.670666] kasan_save_track+0x20/0x40 [ 15.670705] kasan_save_free_info+0x4c/0x78 [ 15.670747] __kasan_slab_free+0x6c/0x98 [ 15.670784] kfree+0x214/0x3c8 [ 15.671021] ksize_uaf+0x11c/0x5f8 [ 15.671235] kunit_try_run_case+0x170/0x3f0 [ 15.671593] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.671976] kthread+0x328/0x630 [ 15.672196] ret_from_fork+0x10/0x20 [ 15.672445] [ 15.672512] The buggy address belongs to the object at fff00000c3f39a00 [ 15.672512] which belongs to the cache kmalloc-128 of size 128 [ 15.672847] The buggy address is located 0 bytes inside of [ 15.672847] freed 128-byte region [fff00000c3f39a00, fff00000c3f39a80) [ 15.672939] [ 15.672959] The buggy address belongs to the physical page: [ 15.673400] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f39 [ 15.673827] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.674150] page_type: f5(slab) [ 15.674371] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 15.674500] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 15.674647] page dumped because: kasan: bad access detected [ 15.675017] [ 15.675095] Memory state around the buggy address: [ 15.675213] fff00000c3f39900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.675271] fff00000c3f39980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.675471] >fff00000c3f39a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.675671] ^ [ 15.675745] fff00000c3f39a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.675801] fff00000c3f39b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.676103] ==================================================================
[ 13.118333] ================================================================== [ 13.118702] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5e4/0x6c0 [ 13.119541] Read of size 1 at addr ffff888102af7a78 by task kunit_try_catch/213 [ 13.119882] [ 13.119973] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 13.120015] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.120027] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.120047] Call Trace: [ 13.120060] <TASK> [ 13.120074] dump_stack_lvl+0x73/0xb0 [ 13.120102] print_report+0xd1/0x610 [ 13.120123] ? __virt_addr_valid+0x1db/0x2d0 [ 13.120144] ? ksize_uaf+0x5e4/0x6c0 [ 13.120164] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.120185] ? ksize_uaf+0x5e4/0x6c0 [ 13.120205] kasan_report+0x141/0x180 [ 13.120226] ? ksize_uaf+0x5e4/0x6c0 [ 13.120251] __asan_report_load1_noabort+0x18/0x20 [ 13.120274] ksize_uaf+0x5e4/0x6c0 [ 13.120294] ? __pfx_ksize_uaf+0x10/0x10 [ 13.120326] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 13.120351] ? trace_hardirqs_on+0x37/0xe0 [ 13.120373] ? __pfx_read_tsc+0x10/0x10 [ 13.120404] ? ktime_get_ts64+0x86/0x230 [ 13.120426] kunit_try_run_case+0x1a5/0x480 [ 13.120450] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.120473] ? queued_spin_lock_slowpath+0x116/0xb40 [ 13.120497] ? __kthread_parkme+0x82/0x180 [ 13.120517] ? preempt_count_sub+0x50/0x80 [ 13.120539] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.120563] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.120585] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.120608] kthread+0x337/0x6f0 [ 13.120627] ? trace_preempt_on+0x20/0xc0 [ 13.120648] ? __pfx_kthread+0x10/0x10 [ 13.120668] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.120689] ? calculate_sigpending+0x7b/0xa0 [ 13.120712] ? __pfx_kthread+0x10/0x10 [ 13.120732] ret_from_fork+0x116/0x1d0 [ 13.120750] ? __pfx_kthread+0x10/0x10 [ 13.120770] ret_from_fork_asm+0x1a/0x30 [ 13.120799] </TASK> [ 13.120808] [ 13.129093] Allocated by task 213: [ 13.129312] kasan_save_stack+0x45/0x70 [ 13.129463] kasan_save_track+0x18/0x40 [ 13.129600] kasan_save_alloc_info+0x3b/0x50 [ 13.129752] __kasan_kmalloc+0xb7/0xc0 [ 13.131423] __kmalloc_cache_noprof+0x189/0x420 [ 13.132037] ksize_uaf+0xaa/0x6c0 [ 13.132618] kunit_try_run_case+0x1a5/0x480 [ 13.133048] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.133259] kthread+0x337/0x6f0 [ 13.133386] ret_from_fork+0x116/0x1d0 [ 13.133522] ret_from_fork_asm+0x1a/0x30 [ 13.133662] [ 13.133735] Freed by task 213: [ 13.133988] kasan_save_stack+0x45/0x70 [ 13.134495] kasan_save_track+0x18/0x40 [ 13.134696] kasan_save_free_info+0x3f/0x60 [ 13.134954] __kasan_slab_free+0x56/0x70 [ 13.135180] kfree+0x222/0x3f0 [ 13.135520] ksize_uaf+0x12c/0x6c0 [ 13.135702] kunit_try_run_case+0x1a5/0x480 [ 13.135957] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.136371] kthread+0x337/0x6f0 [ 13.136542] ret_from_fork+0x116/0x1d0 [ 13.136758] ret_from_fork_asm+0x1a/0x30 [ 13.136976] [ 13.137119] The buggy address belongs to the object at ffff888102af7a00 [ 13.137119] which belongs to the cache kmalloc-128 of size 128 [ 13.137758] The buggy address is located 120 bytes inside of [ 13.137758] freed 128-byte region [ffff888102af7a00, ffff888102af7a80) [ 13.138555] [ 13.138682] The buggy address belongs to the physical page: [ 13.138932] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102af7 [ 13.139190] flags: 0x200000000000000(node=0|zone=2) [ 13.139433] page_type: f5(slab) [ 13.139604] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 13.140148] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 13.140485] page dumped because: kasan: bad access detected [ 13.140662] [ 13.140734] Memory state around the buggy address: [ 13.141112] ffff888102af7900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.141665] ffff888102af7980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.142009] >ffff888102af7a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.142330] ^ [ 13.142841] ffff888102af7a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.143161] ffff888102af7b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.143634] ================================================================== [ 13.095862] ================================================================== [ 13.096179] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5fe/0x6c0 [ 13.096624] Read of size 1 at addr ffff888102af7a00 by task kunit_try_catch/213 [ 13.097050] [ 13.097191] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 13.097244] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.097255] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.097274] Call Trace: [ 13.097288] <TASK> [ 13.097302] dump_stack_lvl+0x73/0xb0 [ 13.097388] print_report+0xd1/0x610 [ 13.097409] ? __virt_addr_valid+0x1db/0x2d0 [ 13.097429] ? ksize_uaf+0x5fe/0x6c0 [ 13.097449] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.097481] ? ksize_uaf+0x5fe/0x6c0 [ 13.097502] kasan_report+0x141/0x180 [ 13.097523] ? ksize_uaf+0x5fe/0x6c0 [ 13.097559] __asan_report_load1_noabort+0x18/0x20 [ 13.097582] ksize_uaf+0x5fe/0x6c0 [ 13.097602] ? __pfx_ksize_uaf+0x10/0x10 [ 13.097622] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 13.097646] ? trace_hardirqs_on+0x37/0xe0 [ 13.097668] ? __pfx_read_tsc+0x10/0x10 [ 13.097688] ? ktime_get_ts64+0x86/0x230 [ 13.097710] kunit_try_run_case+0x1a5/0x480 [ 13.097734] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.097765] ? queued_spin_lock_slowpath+0x116/0xb40 [ 13.097788] ? __kthread_parkme+0x82/0x180 [ 13.097807] ? preempt_count_sub+0x50/0x80 [ 13.097845] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.097869] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.097891] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.097913] kthread+0x337/0x6f0 [ 13.097932] ? trace_preempt_on+0x20/0xc0 [ 13.097953] ? __pfx_kthread+0x10/0x10 [ 13.097982] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.098003] ? calculate_sigpending+0x7b/0xa0 [ 13.098025] ? __pfx_kthread+0x10/0x10 [ 13.098056] ret_from_fork+0x116/0x1d0 [ 13.098074] ? __pfx_kthread+0x10/0x10 [ 13.098094] ret_from_fork_asm+0x1a/0x30 [ 13.098123] </TASK> [ 13.098133] [ 13.106002] Allocated by task 213: [ 13.106293] kasan_save_stack+0x45/0x70 [ 13.106535] kasan_save_track+0x18/0x40 [ 13.106717] kasan_save_alloc_info+0x3b/0x50 [ 13.106880] __kasan_kmalloc+0xb7/0xc0 [ 13.107109] __kmalloc_cache_noprof+0x189/0x420 [ 13.107416] ksize_uaf+0xaa/0x6c0 [ 13.107591] kunit_try_run_case+0x1a5/0x480 [ 13.107801] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.108057] kthread+0x337/0x6f0 [ 13.108437] ret_from_fork+0x116/0x1d0 [ 13.108583] ret_from_fork_asm+0x1a/0x30 [ 13.108728] [ 13.108801] Freed by task 213: [ 13.108930] kasan_save_stack+0x45/0x70 [ 13.109073] kasan_save_track+0x18/0x40 [ 13.109272] kasan_save_free_info+0x3f/0x60 [ 13.109504] __kasan_slab_free+0x56/0x70 [ 13.109699] kfree+0x222/0x3f0 [ 13.109866] ksize_uaf+0x12c/0x6c0 [ 13.110040] kunit_try_run_case+0x1a5/0x480 [ 13.110245] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.110633] kthread+0x337/0x6f0 [ 13.110823] ret_from_fork+0x116/0x1d0 [ 13.111011] ret_from_fork_asm+0x1a/0x30 [ 13.111307] [ 13.111391] The buggy address belongs to the object at ffff888102af7a00 [ 13.111391] which belongs to the cache kmalloc-128 of size 128 [ 13.111866] The buggy address is located 0 bytes inside of [ 13.111866] freed 128-byte region [ffff888102af7a00, ffff888102af7a80) [ 13.112788] [ 13.112908] The buggy address belongs to the physical page: [ 13.113148] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102af7 [ 13.113649] flags: 0x200000000000000(node=0|zone=2) [ 13.113908] page_type: f5(slab) [ 13.114076] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 13.114443] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 13.114712] page dumped because: kasan: bad access detected [ 13.114934] [ 13.115030] Memory state around the buggy address: [ 13.115415] ffff888102af7900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.115668] ffff888102af7980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.116026] >ffff888102af7a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.116512] ^ [ 13.116720] ffff888102af7a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.117037] ffff888102af7b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.117294] ================================================================== [ 13.072408] ================================================================== [ 13.073139] BUG: KASAN: slab-use-after-free in ksize_uaf+0x19d/0x6c0 [ 13.073494] Read of size 1 at addr ffff888102af7a00 by task kunit_try_catch/213 [ 13.073961] [ 13.074070] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 13.074130] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.074142] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.074177] Call Trace: [ 13.074189] <TASK> [ 13.074205] dump_stack_lvl+0x73/0xb0 [ 13.074237] print_report+0xd1/0x610 [ 13.074259] ? __virt_addr_valid+0x1db/0x2d0 [ 13.074282] ? ksize_uaf+0x19d/0x6c0 [ 13.074302] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.074392] ? ksize_uaf+0x19d/0x6c0 [ 13.074433] kasan_report+0x141/0x180 [ 13.074455] ? ksize_uaf+0x19d/0x6c0 [ 13.074479] ? ksize_uaf+0x19d/0x6c0 [ 13.074499] __kasan_check_byte+0x3d/0x50 [ 13.074520] ksize+0x20/0x60 [ 13.074541] ksize_uaf+0x19d/0x6c0 [ 13.074561] ? __pfx_ksize_uaf+0x10/0x10 [ 13.074582] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 13.074607] ? trace_hardirqs_on+0x37/0xe0 [ 13.074629] ? __pfx_read_tsc+0x10/0x10 [ 13.074650] ? ktime_get_ts64+0x86/0x230 [ 13.074686] kunit_try_run_case+0x1a5/0x480 [ 13.074711] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.074746] ? queued_spin_lock_slowpath+0x116/0xb40 [ 13.074771] ? __kthread_parkme+0x82/0x180 [ 13.074791] ? preempt_count_sub+0x50/0x80 [ 13.074829] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.074853] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.074875] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.074909] kthread+0x337/0x6f0 [ 13.074928] ? trace_preempt_on+0x20/0xc0 [ 13.074949] ? __pfx_kthread+0x10/0x10 [ 13.074981] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.075004] ? calculate_sigpending+0x7b/0xa0 [ 13.075028] ? __pfx_kthread+0x10/0x10 [ 13.075060] ret_from_fork+0x116/0x1d0 [ 13.075078] ? __pfx_kthread+0x10/0x10 [ 13.075109] ret_from_fork_asm+0x1a/0x30 [ 13.075150] </TASK> [ 13.075162] [ 13.083747] Allocated by task 213: [ 13.083927] kasan_save_stack+0x45/0x70 [ 13.084154] kasan_save_track+0x18/0x40 [ 13.084598] kasan_save_alloc_info+0x3b/0x50 [ 13.084808] __kasan_kmalloc+0xb7/0xc0 [ 13.085034] __kmalloc_cache_noprof+0x189/0x420 [ 13.085362] ksize_uaf+0xaa/0x6c0 [ 13.085518] kunit_try_run_case+0x1a5/0x480 [ 13.085742] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.085982] kthread+0x337/0x6f0 [ 13.086163] ret_from_fork+0x116/0x1d0 [ 13.086424] ret_from_fork_asm+0x1a/0x30 [ 13.086633] [ 13.086705] Freed by task 213: [ 13.086829] kasan_save_stack+0x45/0x70 [ 13.086966] kasan_save_track+0x18/0x40 [ 13.087194] kasan_save_free_info+0x3f/0x60 [ 13.087457] __kasan_slab_free+0x56/0x70 [ 13.087835] kfree+0x222/0x3f0 [ 13.088005] ksize_uaf+0x12c/0x6c0 [ 13.088328] kunit_try_run_case+0x1a5/0x480 [ 13.088501] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.088783] kthread+0x337/0x6f0 [ 13.088932] ret_from_fork+0x116/0x1d0 [ 13.089148] ret_from_fork_asm+0x1a/0x30 [ 13.089455] [ 13.089544] The buggy address belongs to the object at ffff888102af7a00 [ 13.089544] which belongs to the cache kmalloc-128 of size 128 [ 13.089976] The buggy address is located 0 bytes inside of [ 13.089976] freed 128-byte region [ffff888102af7a00, ffff888102af7a80) [ 13.090494] [ 13.090592] The buggy address belongs to the physical page: [ 13.090998] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102af7 [ 13.091394] flags: 0x200000000000000(node=0|zone=2) [ 13.091648] page_type: f5(slab) [ 13.091861] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 13.092274] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 13.092759] page dumped because: kasan: bad access detected [ 13.093007] [ 13.093103] Memory state around the buggy address: [ 13.093446] ffff888102af7900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.093765] ffff888102af7980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.094017] >ffff888102af7a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.094336] ^ [ 13.094501] ffff888102af7a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.094909] ffff888102af7b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.095341] ==================================================================