Date
May 23, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 27.438418] ================================================================== [ 27.438628] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 27.438792] Read of size 16 at addr fff00000c5a2a6c0 by task kunit_try_catch/170 [ 27.438938] [ 27.439029] CPU: 0 UID: 0 PID: 170 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT [ 27.439264] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.439342] Hardware name: linux,dummy-virt (DT) [ 27.440146] Call trace: [ 27.440263] show_stack+0x20/0x38 (C) [ 27.440903] dump_stack_lvl+0x8c/0xd0 [ 27.441328] print_report+0x118/0x608 [ 27.441960] kasan_report+0xdc/0x128 [ 27.442114] __asan_report_load16_noabort+0x20/0x30 [ 27.442263] kmalloc_uaf_16+0x3bc/0x438 [ 27.442401] kunit_try_run_case+0x170/0x3f0 [ 27.442562] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.443223] kthread+0x328/0x630 [ 27.443536] ret_from_fork+0x10/0x20 [ 27.443781] [ 27.443836] Allocated by task 170: [ 27.444019] kasan_save_stack+0x3c/0x68 [ 27.444247] kasan_save_track+0x20/0x40 [ 27.444828] kasan_save_alloc_info+0x40/0x58 [ 27.445047] __kasan_kmalloc+0xd4/0xd8 [ 27.445178] __kmalloc_cache_noprof+0x15c/0x3c0 [ 27.445387] kmalloc_uaf_16+0x140/0x438 [ 27.445526] kunit_try_run_case+0x170/0x3f0 [ 27.445643] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.445867] kthread+0x328/0x630 [ 27.445979] ret_from_fork+0x10/0x20 [ 27.447240] [ 27.447924] Freed by task 170: [ 27.448025] kasan_save_stack+0x3c/0x68 [ 27.448155] kasan_save_track+0x20/0x40 [ 27.448261] kasan_save_free_info+0x4c/0x78 [ 27.448372] __kasan_slab_free+0x6c/0x98 [ 27.448492] kfree+0x214/0x3c8 [ 27.448595] kmalloc_uaf_16+0x190/0x438 [ 27.448685] kunit_try_run_case+0x170/0x3f0 [ 27.448768] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.449235] kthread+0x328/0x630 [ 27.450047] ret_from_fork+0x10/0x20 [ 27.450434] [ 27.450514] The buggy address belongs to the object at fff00000c5a2a6c0 [ 27.450514] which belongs to the cache kmalloc-16 of size 16 [ 27.450700] The buggy address is located 0 bytes inside of [ 27.450700] freed 16-byte region [fff00000c5a2a6c0, fff00000c5a2a6d0) [ 27.450879] [ 27.452320] The buggy address belongs to the physical page: [ 27.452421] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a2a [ 27.452605] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 27.452751] page_type: f5(slab) [ 27.452861] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 27.453009] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 27.453831] page dumped because: kasan: bad access detected [ 27.453993] [ 27.454050] Memory state around the buggy address: [ 27.454211] fff00000c5a2a580: fa fb fc fc fa fb fc fc fa fb fc fc 00 01 fc fc [ 27.454353] fff00000c5a2a600: 00 01 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 27.454689] >fff00000c5a2a680: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 27.455200] ^ [ 27.455364] fff00000c5a2a700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.455519] fff00000c5a2a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.455635] ==================================================================
[ 12.600730] ================================================================== [ 12.601327] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.601632] Read of size 16 at addr ffff8881020cbe40 by task kunit_try_catch/187 [ 12.602054] [ 12.602175] CPU: 0 UID: 0 PID: 187 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT(voluntary) [ 12.602223] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.602235] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.602257] Call Trace: [ 12.602272] <TASK> [ 12.602302] dump_stack_lvl+0x73/0xb0 [ 12.602331] print_report+0xd1/0x650 [ 12.602353] ? __virt_addr_valid+0x1db/0x2d0 [ 12.602375] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.602395] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.602417] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.602438] kasan_report+0x141/0x180 [ 12.602460] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.602485] __asan_report_load16_noabort+0x18/0x20 [ 12.602506] kmalloc_uaf_16+0x47b/0x4c0 [ 12.602527] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.602548] ? __schedule+0x2077/0x2b30 [ 12.602570] ? __pfx_read_tsc+0x10/0x10 [ 12.602589] ? ktime_get_ts64+0x86/0x230 [ 12.602616] kunit_try_run_case+0x1a5/0x480 [ 12.602641] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.602667] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.602689] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.602711] ? __kthread_parkme+0x82/0x180 [ 12.602733] ? preempt_count_sub+0x50/0x80 [ 12.602758] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.602780] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.602802] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.602824] kthread+0x337/0x6f0 [ 12.602840] ? trace_preempt_on+0x20/0xc0 [ 12.602873] ? __pfx_kthread+0x10/0x10 [ 12.602891] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.602917] ? calculate_sigpending+0x7b/0xa0 [ 12.602938] ? __pfx_kthread+0x10/0x10 [ 12.602956] ret_from_fork+0x41/0x80 [ 12.602976] ? __pfx_kthread+0x10/0x10 [ 12.602993] ret_from_fork_asm+0x1a/0x30 [ 12.603024] </TASK> [ 12.603036] [ 12.610346] Allocated by task 187: [ 12.610530] kasan_save_stack+0x45/0x70 [ 12.610750] kasan_save_track+0x18/0x40 [ 12.611011] kasan_save_alloc_info+0x3b/0x50 [ 12.611199] __kasan_kmalloc+0xb7/0xc0 [ 12.611346] __kmalloc_cache_noprof+0x189/0x420 [ 12.611629] kmalloc_uaf_16+0x15b/0x4c0 [ 12.611827] kunit_try_run_case+0x1a5/0x480 [ 12.612062] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.612235] kthread+0x337/0x6f0 [ 12.612443] ret_from_fork+0x41/0x80 [ 12.612865] ret_from_fork_asm+0x1a/0x30 [ 12.613234] [ 12.613327] Freed by task 187: [ 12.613441] kasan_save_stack+0x45/0x70 [ 12.613638] kasan_save_track+0x18/0x40 [ 12.613867] kasan_save_free_info+0x3f/0x60 [ 12.614074] __kasan_slab_free+0x56/0x70 [ 12.614372] kfree+0x222/0x3f0 [ 12.614546] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.614724] kunit_try_run_case+0x1a5/0x480 [ 12.614870] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.615043] kthread+0x337/0x6f0 [ 12.615161] ret_from_fork+0x41/0x80 [ 12.615358] ret_from_fork_asm+0x1a/0x30 [ 12.615554] [ 12.615649] The buggy address belongs to the object at ffff8881020cbe40 [ 12.615649] which belongs to the cache kmalloc-16 of size 16 [ 12.616210] The buggy address is located 0 bytes inside of [ 12.616210] freed 16-byte region [ffff8881020cbe40, ffff8881020cbe50) [ 12.616573] [ 12.616648] The buggy address belongs to the physical page: [ 12.617205] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1020cb [ 12.617782] flags: 0x200000000000000(node=0|zone=2) [ 12.618020] page_type: f5(slab) [ 12.618189] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.618458] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.618691] page dumped because: kasan: bad access detected [ 12.619107] [ 12.619205] Memory state around the buggy address: [ 12.619440] ffff8881020cbd00: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 12.619716] ffff8881020cbd80: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 12.620201] >ffff8881020cbe00: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 12.620531] ^ [ 12.620767] ffff8881020cbe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.621101] ffff8881020cbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.621407] ==================================================================