Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.451857] ================================================================== [ 22.452046] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 22.452202] Read of size 16 at addr fff00000c5722380 by task kunit_try_catch/172 [ 22.452304] [ 22.452385] CPU: 1 UID: 0 PID: 172 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT [ 22.452597] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.452665] Hardware name: linux,dummy-virt (DT) [ 22.452746] Call trace: [ 22.452803] show_stack+0x20/0x38 (C) [ 22.452929] dump_stack_lvl+0x8c/0xd0 [ 22.453048] print_report+0x118/0x608 [ 22.453166] kasan_report+0xdc/0x128 [ 22.453277] __asan_report_load16_noabort+0x20/0x30 [ 22.453425] kmalloc_uaf_16+0x3bc/0x438 [ 22.453531] kunit_try_run_case+0x170/0x3f0 [ 22.453920] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.454109] kthread+0x328/0x630 [ 22.454271] ret_from_fork+0x10/0x20 [ 22.454442] [ 22.454487] Allocated by task 172: [ 22.454586] kasan_save_stack+0x3c/0x68 [ 22.454733] kasan_save_track+0x20/0x40 [ 22.454854] kasan_save_alloc_info+0x40/0x58 [ 22.454983] __kasan_kmalloc+0xd4/0xd8 [ 22.455097] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.455201] kmalloc_uaf_16+0x140/0x438 [ 22.455340] kunit_try_run_case+0x170/0x3f0 [ 22.455492] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.455939] kthread+0x328/0x630 [ 22.456379] ret_from_fork+0x10/0x20 [ 22.456565] [ 22.456618] Freed by task 172: [ 22.456676] kasan_save_stack+0x3c/0x68 [ 22.456748] kasan_save_track+0x20/0x40 [ 22.456816] kasan_save_free_info+0x4c/0x78 [ 22.456901] __kasan_slab_free+0x6c/0x98 [ 22.457042] kfree+0x214/0x3c8 [ 22.457181] kmalloc_uaf_16+0x190/0x438 [ 22.457275] kunit_try_run_case+0x170/0x3f0 [ 22.457371] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.457494] kthread+0x328/0x630 [ 22.457589] ret_from_fork+0x10/0x20 [ 22.457717] [ 22.457788] The buggy address belongs to the object at fff00000c5722380 [ 22.457788] which belongs to the cache kmalloc-16 of size 16 [ 22.457945] The buggy address is located 0 bytes inside of [ 22.457945] freed 16-byte region [fff00000c5722380, fff00000c5722390) [ 22.458114] [ 22.458182] The buggy address belongs to the physical page: [ 22.458264] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105722 [ 22.458442] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.458556] page_type: f5(slab) [ 22.458650] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 22.458783] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 22.459352] page dumped because: kasan: bad access detected [ 22.459872] [ 22.459943] Memory state around the buggy address: [ 22.460079] fff00000c5722280: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 22.460350] fff00000c5722300: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 22.460606] >fff00000c5722380: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.460711] ^ [ 22.460945] fff00000c5722400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.461310] fff00000c5722480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.461794] ==================================================================
[ 13.701485] ================================================================== [ 13.701929] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 13.702117] Read of size 16 at addr ffff888102497600 by task kunit_try_catch/188 [ 13.702268] [ 13.702355] CPU: 0 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT(voluntary) [ 13.702418] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.702433] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.702457] Call Trace: [ 13.702474] <TASK> [ 13.702496] dump_stack_lvl+0x73/0xb0 [ 13.702530] print_report+0xd1/0x650 [ 13.702575] ? __virt_addr_valid+0x1db/0x2d0 [ 13.702617] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.702653] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.703173] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.703214] kasan_report+0x141/0x180 [ 13.703243] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.703295] __asan_report_load16_noabort+0x18/0x20 [ 13.703336] kmalloc_uaf_16+0x47b/0x4c0 [ 13.703382] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 13.703427] ? __schedule+0x10cc/0x2b30 [ 13.703477] ? __pfx_read_tsc+0x10/0x10 [ 13.703521] ? ktime_get_ts64+0x86/0x230 [ 13.703587] kunit_try_run_case+0x1a5/0x480 [ 13.703632] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.703664] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.704230] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.704259] ? __kthread_parkme+0x82/0x180 [ 13.704287] ? preempt_count_sub+0x50/0x80 [ 13.704317] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.704344] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.704370] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.704395] kthread+0x337/0x6f0 [ 13.704415] ? trace_preempt_on+0x20/0xc0 [ 13.704442] ? __pfx_kthread+0x10/0x10 [ 13.704461] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.704484] ? calculate_sigpending+0x7b/0xa0 [ 13.704509] ? __pfx_kthread+0x10/0x10 [ 13.704530] ret_from_fork+0x41/0x80 [ 13.704553] ? __pfx_kthread+0x10/0x10 [ 13.704600] ret_from_fork_asm+0x1a/0x30 [ 13.704633] </TASK> [ 13.704651] [ 13.715781] Allocated by task 188: [ 13.716033] kasan_save_stack+0x45/0x70 [ 13.716477] kasan_save_track+0x18/0x40 [ 13.716909] kasan_save_alloc_info+0x3b/0x50 [ 13.717135] __kasan_kmalloc+0xb7/0xc0 [ 13.717518] __kmalloc_cache_noprof+0x189/0x420 [ 13.717935] kmalloc_uaf_16+0x15b/0x4c0 [ 13.718322] kunit_try_run_case+0x1a5/0x480 [ 13.718742] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.718991] kthread+0x337/0x6f0 [ 13.719177] ret_from_fork+0x41/0x80 [ 13.719374] ret_from_fork_asm+0x1a/0x30 [ 13.719584] [ 13.719892] Freed by task 188: [ 13.720203] kasan_save_stack+0x45/0x70 [ 13.720543] kasan_save_track+0x18/0x40 [ 13.720952] kasan_save_free_info+0x3f/0x60 [ 13.721303] __kasan_slab_free+0x56/0x70 [ 13.721788] kfree+0x222/0x3f0 [ 13.722143] kmalloc_uaf_16+0x1d6/0x4c0 [ 13.722485] kunit_try_run_case+0x1a5/0x480 [ 13.722881] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.723420] kthread+0x337/0x6f0 [ 13.723752] ret_from_fork+0x41/0x80 [ 13.723954] ret_from_fork_asm+0x1a/0x30 [ 13.724148] [ 13.724264] The buggy address belongs to the object at ffff888102497600 [ 13.724264] which belongs to the cache kmalloc-16 of size 16 [ 13.725461] The buggy address is located 0 bytes inside of [ 13.725461] freed 16-byte region [ffff888102497600, ffff888102497610) [ 13.726412] [ 13.726707] The buggy address belongs to the physical page: [ 13.727176] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102497 [ 13.727722] flags: 0x200000000000000(node=0|zone=2) [ 13.727971] page_type: f5(slab) [ 13.728273] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.728963] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.729535] page dumped because: kasan: bad access detected [ 13.730049] [ 13.730232] Memory state around the buggy address: [ 13.730489] ffff888102497500: 00 01 fc fc 00 01 fc fc fa fb fc fc fa fb fc fc [ 13.731119] ffff888102497580: 00 05 fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 13.731574] >ffff888102497600: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.732139] ^ [ 13.732528] ffff888102497680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.733008] ffff888102497700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.733458] ==================================================================