Date
March 19, 2025, 10:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.775216] ================================================================== [ 34.775362] BUG: KASAN: slab-use-after-free in ksize_uaf+0x59c/0x600 [ 34.775525] Read of size 1 at addr fff00000c6818d00 by task kunit_try_catch/198 [ 34.775684] [ 34.775771] CPU: 1 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT [ 34.776043] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.776153] Hardware name: linux,dummy-virt (DT) [ 34.776252] Call trace: [ 34.776320] show_stack+0x20/0x38 (C) [ 34.776472] dump_stack_lvl+0x8c/0xd0 [ 34.776614] print_report+0x118/0x5f0 [ 34.776758] kasan_report+0xc8/0x118 [ 34.776898] __asan_report_load1_noabort+0x20/0x30 [ 34.777119] ksize_uaf+0x59c/0x600 [ 34.777515] kunit_try_run_case+0x14c/0x3d0 [ 34.777722] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.777896] kthread+0x318/0x618 [ 34.778049] ret_from_fork+0x10/0x20 [ 34.778319] [ 34.778417] Allocated by task 198: [ 34.778522] kasan_save_stack+0x3c/0x68 [ 34.778637] kasan_save_track+0x20/0x40 [ 34.778750] kasan_save_alloc_info+0x40/0x58 [ 34.778907] __kasan_kmalloc+0xd4/0xd8 [ 34.779137] __kmalloc_cache_noprof+0x15c/0x3c0 [ 34.779284] ksize_uaf+0xb8/0x600 [ 34.779399] kunit_try_run_case+0x14c/0x3d0 [ 34.779524] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.779686] kthread+0x318/0x618 [ 34.779860] ret_from_fork+0x10/0x20 [ 34.779977] [ 34.780312] Freed by task 198: [ 34.780453] kasan_save_stack+0x3c/0x68 [ 34.780583] kasan_save_track+0x20/0x40 [ 34.780701] kasan_save_free_info+0x4c/0x78 [ 34.780832] __kasan_slab_free+0x6c/0x98 [ 34.780993] kfree+0x214/0x3c8 [ 34.781129] ksize_uaf+0x11c/0x600 [ 34.781250] kunit_try_run_case+0x14c/0x3d0 [ 34.781379] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.781636] kthread+0x318/0x618 [ 34.781812] ret_from_fork+0x10/0x20 [ 34.782005] [ 34.782111] The buggy address belongs to the object at fff00000c6818d00 [ 34.782111] which belongs to the cache kmalloc-128 of size 128 [ 34.782329] The buggy address is located 0 bytes inside of [ 34.782329] freed 128-byte region [fff00000c6818d00, fff00000c6818d80) [ 34.782565] [ 34.782630] The buggy address belongs to the physical page: [ 34.782729] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106818 [ 34.782892] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.783095] page_type: f5(slab) [ 34.783244] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 34.783459] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 34.783635] page dumped because: kasan: bad access detected [ 34.783762] [ 34.783863] Memory state around the buggy address: [ 34.783986] fff00000c6818c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.784167] fff00000c6818c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.784303] >fff00000c6818d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.784481] ^ [ 34.784617] fff00000c6818d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.784755] fff00000c6818e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.784883] ================================================================== [ 34.759404] ================================================================== [ 34.759560] BUG: KASAN: slab-use-after-free in ksize_uaf+0x168/0x600 [ 34.759740] Read of size 1 at addr fff00000c6818d00 by task kunit_try_catch/198 [ 34.759954] [ 34.760112] CPU: 1 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT [ 34.760549] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.760737] Hardware name: linux,dummy-virt (DT) [ 34.760866] Call trace: [ 34.760938] show_stack+0x20/0x38 (C) [ 34.761103] dump_stack_lvl+0x8c/0xd0 [ 34.761252] print_report+0x118/0x5f0 [ 34.761409] kasan_report+0xc8/0x118 [ 34.761656] __kasan_check_byte+0x54/0x70 [ 34.761837] ksize+0x30/0x88 [ 34.761977] ksize_uaf+0x168/0x600 [ 34.762200] kunit_try_run_case+0x14c/0x3d0 [ 34.762433] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.762708] kthread+0x318/0x618 [ 34.762941] ret_from_fork+0x10/0x20 [ 34.763660] [ 34.763730] Allocated by task 198: [ 34.763817] kasan_save_stack+0x3c/0x68 [ 34.763945] kasan_save_track+0x20/0x40 [ 34.764080] kasan_save_alloc_info+0x40/0x58 [ 34.764582] __kasan_kmalloc+0xd4/0xd8 [ 34.764717] __kmalloc_cache_noprof+0x15c/0x3c0 [ 34.764848] ksize_uaf+0xb8/0x600 [ 34.764959] kunit_try_run_case+0x14c/0x3d0 [ 34.765145] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.765366] kthread+0x318/0x618 [ 34.765497] ret_from_fork+0x10/0x20 [ 34.765680] [ 34.765786] Freed by task 198: [ 34.765878] kasan_save_stack+0x3c/0x68 [ 34.766031] kasan_save_track+0x20/0x40 [ 34.766244] kasan_save_free_info+0x4c/0x78 [ 34.766452] __kasan_slab_free+0x6c/0x98 [ 34.766590] kfree+0x214/0x3c8 [ 34.766702] ksize_uaf+0x11c/0x600 [ 34.766815] kunit_try_run_case+0x14c/0x3d0 [ 34.766954] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.767115] kthread+0x318/0x618 [ 34.767233] ret_from_fork+0x10/0x20 [ 34.768022] [ 34.768116] The buggy address belongs to the object at fff00000c6818d00 [ 34.768116] which belongs to the cache kmalloc-128 of size 128 [ 34.768310] The buggy address is located 0 bytes inside of [ 34.768310] freed 128-byte region [fff00000c6818d00, fff00000c6818d80) [ 34.769374] [ 34.769448] The buggy address belongs to the physical page: [ 34.769547] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106818 [ 34.769740] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.769965] page_type: f5(slab) [ 34.770105] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 34.770277] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 34.770428] page dumped because: kasan: bad access detected [ 34.770574] [ 34.770630] Memory state around the buggy address: [ 34.770744] fff00000c6818c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.770980] fff00000c6818c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.771154] >fff00000c6818d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.771282] ^ [ 34.771373] fff00000c6818d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.772075] fff00000c6818e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.772326] ================================================================== [ 34.786873] ================================================================== [ 34.787025] BUG: KASAN: slab-use-after-free in ksize_uaf+0x548/0x600 [ 34.787191] Read of size 1 at addr fff00000c6818d78 by task kunit_try_catch/198 [ 34.787351] [ 34.787437] CPU: 1 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT [ 34.788657] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.788788] Hardware name: linux,dummy-virt (DT) [ 34.789527] Call trace: [ 34.789678] show_stack+0x20/0x38 (C) [ 34.789888] dump_stack_lvl+0x8c/0xd0 [ 34.790067] print_report+0x118/0x5f0 [ 34.790217] kasan_report+0xc8/0x118 [ 34.790354] __asan_report_load1_noabort+0x20/0x30 [ 34.790513] ksize_uaf+0x548/0x600 [ 34.790661] kunit_try_run_case+0x14c/0x3d0 [ 34.790825] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.791046] kthread+0x318/0x618 [ 34.791279] ret_from_fork+0x10/0x20 [ 34.791476] [ 34.791536] Allocated by task 198: [ 34.791680] kasan_save_stack+0x3c/0x68 [ 34.791862] kasan_save_track+0x20/0x40 [ 34.791977] kasan_save_alloc_info+0x40/0x58 [ 34.792140] __kasan_kmalloc+0xd4/0xd8 [ 34.792254] __kmalloc_cache_noprof+0x15c/0x3c0 [ 34.792495] ksize_uaf+0xb8/0x600 [ 34.792649] kunit_try_run_case+0x14c/0x3d0 [ 34.792779] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.792926] kthread+0x318/0x618 [ 34.793047] ret_from_fork+0x10/0x20 [ 34.793203] [ 34.793290] Freed by task 198: [ 34.793434] kasan_save_stack+0x3c/0x68 [ 34.793618] kasan_save_track+0x20/0x40 [ 34.793808] kasan_save_free_info+0x4c/0x78 [ 34.794006] __kasan_slab_free+0x6c/0x98 [ 34.794154] kfree+0x214/0x3c8 [ 34.794267] ksize_uaf+0x11c/0x600 [ 34.794380] kunit_try_run_case+0x14c/0x3d0 [ 34.794533] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.794726] kthread+0x318/0x618 [ 34.794917] ret_from_fork+0x10/0x20 [ 34.795148] [ 34.795209] The buggy address belongs to the object at fff00000c6818d00 [ 34.795209] which belongs to the cache kmalloc-128 of size 128 [ 34.795773] The buggy address is located 120 bytes inside of [ 34.795773] freed 128-byte region [fff00000c6818d00, fff00000c6818d80) [ 34.796086] [ 34.796157] The buggy address belongs to the physical page: [ 34.796253] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106818 [ 34.796447] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.796619] page_type: f5(slab) [ 34.796847] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 34.797121] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 34.797764] page dumped because: kasan: bad access detected [ 34.797945] [ 34.798008] Memory state around the buggy address: [ 34.798129] fff00000c6818c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.798276] fff00000c6818c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.798422] >fff00000c6818d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.798554] ^ [ 34.798705] fff00000c6818d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.798840] fff00000c6818e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.799390] ==================================================================
[ 22.588947] ================================================================== [ 22.589863] BUG: KASAN: slab-use-after-free in ksize_uaf+0x19d/0x6c0 [ 22.590357] Read of size 1 at addr ffff88810305a800 by task kunit_try_catch/217 [ 22.590780] [ 22.591036] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 22.591211] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.591249] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.591335] Call Trace: [ 22.591373] <TASK> [ 22.591409] dump_stack_lvl+0x73/0xb0 [ 22.591516] print_report+0xd1/0x660 [ 22.591579] ? __virt_addr_valid+0x1db/0x2d0 [ 22.591742] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.591812] kasan_report+0x104/0x140 [ 22.591867] ? ksize_uaf+0x19d/0x6c0 [ 22.591924] ? ksize_uaf+0x19d/0x6c0 [ 22.591997] ? ksize_uaf+0x19d/0x6c0 [ 22.592053] __kasan_check_byte+0x3d/0x50 [ 22.592134] ksize+0x20/0x60 [ 22.592191] ksize_uaf+0x19d/0x6c0 [ 22.592244] ? __pfx_ksize_uaf+0x10/0x10 [ 22.592300] ? __schedule+0xd46/0x29c0 [ 22.592356] ? __pfx_read_tsc+0x10/0x10 [ 22.592411] ? ktime_get_ts64+0x86/0x240 [ 22.593864] kunit_try_run_case+0x1b2/0x490 [ 22.593969] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.594028] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.594085] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.594296] ? __kthread_parkme+0x82/0x160 [ 22.594387] ? preempt_count_sub+0x50/0x80 [ 22.594459] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.594526] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.594586] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.595186] kthread+0x323/0x710 [ 22.595310] ? trace_preempt_on+0x20/0xc0 [ 22.595391] ? __pfx_kthread+0x10/0x10 [ 22.595451] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.595506] ? calculate_sigpending+0x7b/0xa0 [ 22.595564] ? __pfx_kthread+0x10/0x10 [ 22.595650] ret_from_fork+0x41/0x80 [ 22.596000] ? __pfx_kthread+0x10/0x10 [ 22.596098] ret_from_fork_asm+0x1a/0x30 [ 22.596234] </TASK> [ 22.596262] [ 22.618477] Allocated by task 217: [ 22.618620] kasan_save_stack+0x3d/0x60 [ 22.618777] kasan_save_track+0x18/0x40 [ 22.618920] kasan_save_alloc_info+0x3b/0x50 [ 22.619663] __kasan_kmalloc+0xb7/0xc0 [ 22.620395] __kmalloc_cache_noprof+0x183/0x410 [ 22.621188] ksize_uaf+0xaa/0x6c0 [ 22.621667] kunit_try_run_case+0x1b2/0x490 [ 22.622477] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.623313] kthread+0x323/0x710 [ 22.624087] ret_from_fork+0x41/0x80 [ 22.624505] ret_from_fork_asm+0x1a/0x30 [ 22.624805] [ 22.625025] Freed by task 217: [ 22.625349] kasan_save_stack+0x3d/0x60 [ 22.625640] kasan_save_track+0x18/0x40 [ 22.626054] kasan_save_free_info+0x3f/0x60 [ 22.626920] __kasan_slab_free+0x56/0x70 [ 22.627285] kfree+0x222/0x3f0 [ 22.627669] ksize_uaf+0x12c/0x6c0 [ 22.628333] kunit_try_run_case+0x1b2/0x490 [ 22.629007] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.629547] kthread+0x323/0x710 [ 22.630137] ret_from_fork+0x41/0x80 [ 22.630584] ret_from_fork_asm+0x1a/0x30 [ 22.631168] [ 22.631391] The buggy address belongs to the object at ffff88810305a800 [ 22.631391] which belongs to the cache kmalloc-128 of size 128 [ 22.632423] The buggy address is located 0 bytes inside of [ 22.632423] freed 128-byte region [ffff88810305a800, ffff88810305a880) [ 22.633654] [ 22.634140] The buggy address belongs to the physical page: [ 22.634512] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10305a [ 22.635452] flags: 0x200000000000000(node=0|zone=2) [ 22.636237] page_type: f5(slab) [ 22.636557] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 22.637381] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 22.638188] page dumped because: kasan: bad access detected [ 22.638874] [ 22.639097] Memory state around the buggy address: [ 22.639664] ffff88810305a700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.641145] ffff88810305a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.641621] >ffff88810305a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.642440] ^ [ 22.643099] ffff88810305a880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.643581] ffff88810305a900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.644441] ================================================================== [ 22.698783] ================================================================== [ 22.699700] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5e4/0x6c0 [ 22.700407] Read of size 1 at addr ffff88810305a878 by task kunit_try_catch/217 [ 22.700797] [ 22.701051] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 22.701197] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.701231] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.701386] Call Trace: [ 22.701430] <TASK> [ 22.701464] dump_stack_lvl+0x73/0xb0 [ 22.701541] print_report+0xd1/0x660 [ 22.701603] ? __virt_addr_valid+0x1db/0x2d0 [ 22.701722] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.702235] kasan_report+0x104/0x140 [ 22.702346] ? ksize_uaf+0x5e4/0x6c0 [ 22.702419] ? ksize_uaf+0x5e4/0x6c0 [ 22.702489] __asan_report_load1_noabort+0x18/0x20 [ 22.702550] ksize_uaf+0x5e4/0x6c0 [ 22.702608] ? __pfx_ksize_uaf+0x10/0x10 [ 22.702690] ? __schedule+0xd46/0x29c0 [ 22.702775] ? __pfx_read_tsc+0x10/0x10 [ 22.702834] ? ktime_get_ts64+0x86/0x240 [ 22.703064] kunit_try_run_case+0x1b2/0x490 [ 22.703198] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.703291] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.703354] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.703409] ? __kthread_parkme+0x82/0x160 [ 22.703442] ? preempt_count_sub+0x50/0x80 [ 22.703481] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.703515] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.703570] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.703662] kthread+0x323/0x710 [ 22.703759] ? trace_preempt_on+0x20/0xc0 [ 22.703820] ? __pfx_kthread+0x10/0x10 [ 22.703882] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.703946] ? calculate_sigpending+0x7b/0xa0 [ 22.704271] ? __pfx_kthread+0x10/0x10 [ 22.704349] ret_from_fork+0x41/0x80 [ 22.704409] ? __pfx_kthread+0x10/0x10 [ 22.704519] ret_from_fork_asm+0x1a/0x30 [ 22.704616] </TASK> [ 22.704643] [ 22.719518] Allocated by task 217: [ 22.720238] kasan_save_stack+0x3d/0x60 [ 22.720826] kasan_save_track+0x18/0x40 [ 22.721244] kasan_save_alloc_info+0x3b/0x50 [ 22.721733] __kasan_kmalloc+0xb7/0xc0 [ 22.722715] __kmalloc_cache_noprof+0x183/0x410 [ 22.723366] ksize_uaf+0xaa/0x6c0 [ 22.723720] kunit_try_run_case+0x1b2/0x490 [ 22.724025] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.724799] kthread+0x323/0x710 [ 22.725283] ret_from_fork+0x41/0x80 [ 22.725690] ret_from_fork_asm+0x1a/0x30 [ 22.726599] [ 22.726934] Freed by task 217: [ 22.727196] kasan_save_stack+0x3d/0x60 [ 22.727676] kasan_save_track+0x18/0x40 [ 22.728420] kasan_save_free_info+0x3f/0x60 [ 22.729214] __kasan_slab_free+0x56/0x70 [ 22.729554] kfree+0x222/0x3f0 [ 22.730486] ksize_uaf+0x12c/0x6c0 [ 22.731049] kunit_try_run_case+0x1b2/0x490 [ 22.731446] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.732030] kthread+0x323/0x710 [ 22.732805] ret_from_fork+0x41/0x80 [ 22.733198] ret_from_fork_asm+0x1a/0x30 [ 22.733671] [ 22.733843] The buggy address belongs to the object at ffff88810305a800 [ 22.733843] which belongs to the cache kmalloc-128 of size 128 [ 22.734436] The buggy address is located 120 bytes inside of [ 22.734436] freed 128-byte region [ffff88810305a800, ffff88810305a880) [ 22.735004] [ 22.735210] The buggy address belongs to the physical page: [ 22.736252] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10305a [ 22.737634] flags: 0x200000000000000(node=0|zone=2) [ 22.738249] page_type: f5(slab) [ 22.738594] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 22.740306] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 22.740809] page dumped because: kasan: bad access detected [ 22.741484] [ 22.741754] Memory state around the buggy address: [ 22.742099] ffff88810305a700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.743032] ffff88810305a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.743602] >ffff88810305a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.744004] ^ [ 22.744613] ffff88810305a880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.745786] ffff88810305a900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.746447] ================================================================== [ 22.648044] ================================================================== [ 22.649198] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5fe/0x6c0 [ 22.650312] Read of size 1 at addr ffff88810305a800 by task kunit_try_catch/217 [ 22.650810] [ 22.651642] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 22.652073] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.652098] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.652152] Call Trace: [ 22.652171] <TASK> [ 22.652193] dump_stack_lvl+0x73/0xb0 [ 22.652235] print_report+0xd1/0x660 [ 22.652269] ? __virt_addr_valid+0x1db/0x2d0 [ 22.652332] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.652367] kasan_report+0x104/0x140 [ 22.652396] ? ksize_uaf+0x5fe/0x6c0 [ 22.652428] ? ksize_uaf+0x5fe/0x6c0 [ 22.652467] __asan_report_load1_noabort+0x18/0x20 [ 22.652496] ksize_uaf+0x5fe/0x6c0 [ 22.652526] ? __pfx_ksize_uaf+0x10/0x10 [ 22.652558] ? __schedule+0xd46/0x29c0 [ 22.652588] ? __pfx_read_tsc+0x10/0x10 [ 22.652617] ? ktime_get_ts64+0x86/0x240 [ 22.652653] kunit_try_run_case+0x1b2/0x490 [ 22.652745] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.652835] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.652894] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.652950] ? __kthread_parkme+0x82/0x160 [ 22.653001] ? preempt_count_sub+0x50/0x80 [ 22.653066] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.653103] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.653175] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.653209] kthread+0x323/0x710 [ 22.653239] ? trace_preempt_on+0x20/0xc0 [ 22.653274] ? __pfx_kthread+0x10/0x10 [ 22.653305] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.653334] ? calculate_sigpending+0x7b/0xa0 [ 22.653364] ? __pfx_kthread+0x10/0x10 [ 22.653396] ret_from_fork+0x41/0x80 [ 22.653426] ? __pfx_kthread+0x10/0x10 [ 22.653457] ret_from_fork_asm+0x1a/0x30 [ 22.653503] </TASK> [ 22.653519] [ 22.672826] Allocated by task 217: [ 22.673267] kasan_save_stack+0x3d/0x60 [ 22.673837] kasan_save_track+0x18/0x40 [ 22.674614] kasan_save_alloc_info+0x3b/0x50 [ 22.675182] __kasan_kmalloc+0xb7/0xc0 [ 22.675763] __kmalloc_cache_noprof+0x183/0x410 [ 22.676338] ksize_uaf+0xaa/0x6c0 [ 22.676806] kunit_try_run_case+0x1b2/0x490 [ 22.677368] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.678044] kthread+0x323/0x710 [ 22.678468] ret_from_fork+0x41/0x80 [ 22.679026] ret_from_fork_asm+0x1a/0x30 [ 22.679566] [ 22.679948] Freed by task 217: [ 22.680369] kasan_save_stack+0x3d/0x60 [ 22.680830] kasan_save_track+0x18/0x40 [ 22.681167] kasan_save_free_info+0x3f/0x60 [ 22.681782] __kasan_slab_free+0x56/0x70 [ 22.682326] kfree+0x222/0x3f0 [ 22.682794] ksize_uaf+0x12c/0x6c0 [ 22.683304] kunit_try_run_case+0x1b2/0x490 [ 22.683905] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.684574] kthread+0x323/0x710 [ 22.685094] ret_from_fork+0x41/0x80 [ 22.685610] ret_from_fork_asm+0x1a/0x30 [ 22.686194] [ 22.686373] The buggy address belongs to the object at ffff88810305a800 [ 22.686373] which belongs to the cache kmalloc-128 of size 128 [ 22.687813] The buggy address is located 0 bytes inside of [ 22.687813] freed 128-byte region [ffff88810305a800, ffff88810305a880) [ 22.689178] [ 22.689462] The buggy address belongs to the physical page: [ 22.689809] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10305a [ 22.690241] flags: 0x200000000000000(node=0|zone=2) [ 22.690541] page_type: f5(slab) [ 22.690980] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 22.691806] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 22.692611] page dumped because: kasan: bad access detected [ 22.693181] [ 22.693404] Memory state around the buggy address: [ 22.694023] ffff88810305a700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.694608] ffff88810305a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.694985] >ffff88810305a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.695603] ^ [ 22.696042] ffff88810305a880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.696727] ffff88810305a900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.697772] ==================================================================