Date
May 23, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 27.777961] ================================================================== [ 27.778153] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 27.778320] Read of size 1 at addr fff00000c5a2a6e8 by task kunit_try_catch/186 [ 27.778486] [ 27.778582] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT [ 27.778827] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.778909] Hardware name: linux,dummy-virt (DT) [ 27.778998] Call trace: [ 27.779079] show_stack+0x20/0x38 (C) [ 27.779221] dump_stack_lvl+0x8c/0xd0 [ 27.779368] print_report+0x118/0x608 [ 27.779515] kasan_report+0xdc/0x128 [ 27.779638] __asan_report_load1_noabort+0x20/0x30 [ 27.779846] kmalloc_uaf+0x300/0x338 [ 27.780438] kunit_try_run_case+0x170/0x3f0 [ 27.780604] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.780782] kthread+0x328/0x630 [ 27.780898] ret_from_fork+0x10/0x20 [ 27.781028] [ 27.781087] Allocated by task 186: [ 27.781400] kasan_save_stack+0x3c/0x68 [ 27.781551] kasan_save_track+0x20/0x40 [ 27.781674] kasan_save_alloc_info+0x40/0x58 [ 27.781785] __kasan_kmalloc+0xd4/0xd8 [ 27.781902] __kmalloc_cache_noprof+0x15c/0x3c0 [ 27.782029] kmalloc_uaf+0xb8/0x338 [ 27.782184] kunit_try_run_case+0x170/0x3f0 [ 27.782307] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.782437] kthread+0x328/0x630 [ 27.782664] ret_from_fork+0x10/0x20 [ 27.782800] [ 27.783042] Freed by task 186: [ 27.783415] kasan_save_stack+0x3c/0x68 [ 27.783762] kasan_save_track+0x20/0x40 [ 27.783979] kasan_save_free_info+0x4c/0x78 [ 27.784109] __kasan_slab_free+0x6c/0x98 [ 27.784200] kfree+0x214/0x3c8 [ 27.784320] kmalloc_uaf+0x11c/0x338 [ 27.784416] kunit_try_run_case+0x170/0x3f0 [ 27.784577] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.784756] kthread+0x328/0x630 [ 27.784916] ret_from_fork+0x10/0x20 [ 27.785019] [ 27.785076] The buggy address belongs to the object at fff00000c5a2a6e0 [ 27.785076] which belongs to the cache kmalloc-16 of size 16 [ 27.785273] The buggy address is located 8 bytes inside of [ 27.785273] freed 16-byte region [fff00000c5a2a6e0, fff00000c5a2a6f0) [ 27.785544] [ 27.785604] The buggy address belongs to the physical page: [ 27.785717] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a2a [ 27.785889] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 27.786037] page_type: f5(slab) [ 27.786149] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 27.786344] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 27.786476] page dumped because: kasan: bad access detected [ 27.786564] [ 27.786614] Memory state around the buggy address: [ 27.786703] fff00000c5a2a580: fa fb fc fc fa fb fc fc fa fb fc fc 00 01 fc fc [ 27.786884] fff00000c5a2a600: 00 01 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 27.787068] >fff00000c5a2a680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 27.787208] ^ [ 27.787327] fff00000c5a2a700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.787485] fff00000c5a2a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.787631] ==================================================================
[ 12.814059] ================================================================== [ 12.815023] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 12.815325] Read of size 1 at addr ffff8881020cbe68 by task kunit_try_catch/203 [ 12.816067] [ 12.816433] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT(voluntary) [ 12.816487] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.816500] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.816555] Call Trace: [ 12.816569] <TASK> [ 12.816585] dump_stack_lvl+0x73/0xb0 [ 12.816614] print_report+0xd1/0x650 [ 12.816635] ? __virt_addr_valid+0x1db/0x2d0 [ 12.816657] ? kmalloc_uaf+0x320/0x380 [ 12.816677] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.816699] ? kmalloc_uaf+0x320/0x380 [ 12.816719] kasan_report+0x141/0x180 [ 12.816741] ? kmalloc_uaf+0x320/0x380 [ 12.816766] __asan_report_load1_noabort+0x18/0x20 [ 12.816786] kmalloc_uaf+0x320/0x380 [ 12.816805] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.816826] ? __schedule+0x10cc/0x2b30 [ 12.816847] ? __pfx_read_tsc+0x10/0x10 [ 12.816866] ? ktime_get_ts64+0x86/0x230 [ 12.816889] kunit_try_run_case+0x1a5/0x480 [ 12.816912] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.816933] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.816955] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.816977] ? __kthread_parkme+0x82/0x180 [ 12.816998] ? preempt_count_sub+0x50/0x80 [ 12.817022] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.817045] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.817066] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.817088] kthread+0x337/0x6f0 [ 12.817104] ? trace_preempt_on+0x20/0xc0 [ 12.817126] ? __pfx_kthread+0x10/0x10 [ 12.817143] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.817163] ? calculate_sigpending+0x7b/0xa0 [ 12.817183] ? __pfx_kthread+0x10/0x10 [ 12.817201] ret_from_fork+0x41/0x80 [ 12.817220] ? __pfx_kthread+0x10/0x10 [ 12.817237] ret_from_fork_asm+0x1a/0x30 [ 12.817267] </TASK> [ 12.817279] [ 12.830106] Allocated by task 203: [ 12.830273] kasan_save_stack+0x45/0x70 [ 12.830782] kasan_save_track+0x18/0x40 [ 12.830938] kasan_save_alloc_info+0x3b/0x50 [ 12.831189] __kasan_kmalloc+0xb7/0xc0 [ 12.831369] __kmalloc_cache_noprof+0x189/0x420 [ 12.832063] kmalloc_uaf+0xaa/0x380 [ 12.832306] kunit_try_run_case+0x1a5/0x480 [ 12.832643] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.832944] kthread+0x337/0x6f0 [ 12.833112] ret_from_fork+0x41/0x80 [ 12.833280] ret_from_fork_asm+0x1a/0x30 [ 12.833788] [ 12.833880] Freed by task 203: [ 12.834207] kasan_save_stack+0x45/0x70 [ 12.834402] kasan_save_track+0x18/0x40 [ 12.834897] kasan_save_free_info+0x3f/0x60 [ 12.835398] __kasan_slab_free+0x56/0x70 [ 12.835661] kfree+0x222/0x3f0 [ 12.835815] kmalloc_uaf+0x12c/0x380 [ 12.836339] kunit_try_run_case+0x1a5/0x480 [ 12.836802] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.837095] kthread+0x337/0x6f0 [ 12.837252] ret_from_fork+0x41/0x80 [ 12.837435] ret_from_fork_asm+0x1a/0x30 [ 12.837619] [ 12.837709] The buggy address belongs to the object at ffff8881020cbe60 [ 12.837709] which belongs to the cache kmalloc-16 of size 16 [ 12.838762] The buggy address is located 8 bytes inside of [ 12.838762] freed 16-byte region [ffff8881020cbe60, ffff8881020cbe70) [ 12.839843] [ 12.840018] The buggy address belongs to the physical page: [ 12.840251] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1020cb [ 12.840879] flags: 0x200000000000000(node=0|zone=2) [ 12.841326] page_type: f5(slab) [ 12.841758] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.842527] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.843213] page dumped because: kasan: bad access detected [ 12.843680] [ 12.843782] Memory state around the buggy address: [ 12.844162] ffff8881020cbd00: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 12.844621] ffff8881020cbd80: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 12.845283] >ffff8881020cbe00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.845731] ^ [ 12.846183] ffff8881020cbe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.846648] ffff8881020cbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.847147] ==================================================================