Date
May 15, 2025, 10:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.003610] ================================================================== [ 18.003711] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 18.003765] Read of size 16 at addr fff00000c5ccd2e0 by task kunit_try_catch/168 [ 18.003825] [ 18.004067] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT [ 18.004177] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.004204] Hardware name: linux,dummy-virt (DT) [ 18.004341] Call trace: [ 18.004399] show_stack+0x20/0x38 (C) [ 18.004452] dump_stack_lvl+0x8c/0xd0 [ 18.004779] print_report+0x118/0x608 [ 18.004892] kasan_report+0xdc/0x128 [ 18.004942] __asan_report_load16_noabort+0x20/0x30 [ 18.005227] kmalloc_uaf_16+0x3bc/0x438 [ 18.005323] kunit_try_run_case+0x170/0x3f0 [ 18.005388] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.005441] kthread+0x328/0x630 [ 18.005683] ret_from_fork+0x10/0x20 [ 18.006213] [ 18.006234] Allocated by task 168: [ 18.006285] kasan_save_stack+0x3c/0x68 [ 18.006646] kasan_save_track+0x20/0x40 [ 18.006740] kasan_save_alloc_info+0x40/0x58 [ 18.006782] __kasan_kmalloc+0xd4/0xd8 [ 18.006826] __kmalloc_cache_noprof+0x15c/0x3c0 [ 18.006864] kmalloc_uaf_16+0x140/0x438 [ 18.006897] kunit_try_run_case+0x170/0x3f0 [ 18.006941] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.006989] kthread+0x328/0x630 [ 18.007023] ret_from_fork+0x10/0x20 [ 18.007057] [ 18.007076] Freed by task 168: [ 18.007102] kasan_save_stack+0x3c/0x68 [ 18.007138] kasan_save_track+0x20/0x40 [ 18.007185] kasan_save_free_info+0x4c/0x78 [ 18.007222] __kasan_slab_free+0x6c/0x98 [ 18.007258] kfree+0x214/0x3c8 [ 18.007298] kmalloc_uaf_16+0x190/0x438 [ 18.007339] kunit_try_run_case+0x170/0x3f0 [ 18.007374] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.007429] kthread+0x328/0x630 [ 18.007462] ret_from_fork+0x10/0x20 [ 18.007496] [ 18.007525] The buggy address belongs to the object at fff00000c5ccd2e0 [ 18.007525] which belongs to the cache kmalloc-16 of size 16 [ 18.007580] The buggy address is located 0 bytes inside of [ 18.007580] freed 16-byte region [fff00000c5ccd2e0, fff00000c5ccd2f0) [ 18.007637] [ 18.007656] The buggy address belongs to the physical page: [ 18.007686] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105ccd [ 18.007743] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.007790] page_type: f5(slab) [ 18.007833] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.007903] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.007951] page dumped because: kasan: bad access detected [ 18.007989] [ 18.008007] Memory state around the buggy address: [ 18.008037] fff00000c5ccd180: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.008077] fff00000c5ccd200: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 18.008132] >fff00000c5ccd280: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 18.008917] ^ [ 18.009011] fff00000c5ccd300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.009077] fff00000c5ccd380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.009131] ==================================================================
[ 14.068884] ================================================================== [ 14.069367] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 14.069866] Read of size 16 at addr ffff888102817b40 by task kunit_try_catch/186 [ 14.070080] [ 14.070185] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) [ 14.070266] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.070286] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.070324] Call Trace: [ 14.070357] <TASK> [ 14.070391] dump_stack_lvl+0x73/0xb0 [ 14.070795] print_report+0xd1/0x650 [ 14.070908] ? __virt_addr_valid+0x1db/0x2d0 [ 14.070972] ? kmalloc_uaf_16+0x47b/0x4c0 [ 14.071026] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.071077] ? kmalloc_uaf_16+0x47b/0x4c0 [ 14.071124] kasan_report+0x141/0x180 [ 14.071167] ? kmalloc_uaf_16+0x47b/0x4c0 [ 14.071218] __asan_report_load16_noabort+0x18/0x20 [ 14.071272] kmalloc_uaf_16+0x47b/0x4c0 [ 14.071334] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 14.071384] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 14.071435] kunit_try_run_case+0x1a5/0x480 [ 14.071521] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.071562] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.071741] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.071781] ? __kthread_parkme+0x82/0x180 [ 14.071813] ? preempt_count_sub+0x50/0x80 [ 14.071842] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.071866] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.071938] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.071963] kthread+0x337/0x6f0 [ 14.071983] ? trace_preempt_on+0x20/0xc0 [ 14.072009] ? __pfx_kthread+0x10/0x10 [ 14.072029] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.072050] ? calculate_sigpending+0x7b/0xa0 [ 14.072074] ? __pfx_kthread+0x10/0x10 [ 14.072095] ret_from_fork+0x116/0x1d0 [ 14.072115] ? __pfx_kthread+0x10/0x10 [ 14.072135] ret_from_fork_asm+0x1a/0x30 [ 14.072167] </TASK> [ 14.072180] [ 14.083314] Allocated by task 186: [ 14.083676] kasan_save_stack+0x45/0x70 [ 14.084078] kasan_save_track+0x18/0x40 [ 14.084406] kasan_save_alloc_info+0x3b/0x50 [ 14.084813] __kasan_kmalloc+0xb7/0xc0 [ 14.085153] __kmalloc_cache_noprof+0x189/0x420 [ 14.085682] kmalloc_uaf_16+0x15b/0x4c0 [ 14.086028] kunit_try_run_case+0x1a5/0x480 [ 14.086479] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.086947] kthread+0x337/0x6f0 [ 14.087252] ret_from_fork+0x116/0x1d0 [ 14.087620] ret_from_fork_asm+0x1a/0x30 [ 14.087969] [ 14.088249] Freed by task 186: [ 14.088511] kasan_save_stack+0x45/0x70 [ 14.088859] kasan_save_track+0x18/0x40 [ 14.089155] kasan_save_free_info+0x3f/0x60 [ 14.089570] __kasan_slab_free+0x56/0x70 [ 14.089785] kfree+0x222/0x3f0 [ 14.089973] kmalloc_uaf_16+0x1d6/0x4c0 [ 14.090358] kunit_try_run_case+0x1a5/0x480 [ 14.090786] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.091198] kthread+0x337/0x6f0 [ 14.091603] ret_from_fork+0x116/0x1d0 [ 14.092067] ret_from_fork_asm+0x1a/0x30 [ 14.092398] [ 14.092609] The buggy address belongs to the object at ffff888102817b40 [ 14.092609] which belongs to the cache kmalloc-16 of size 16 [ 14.093446] The buggy address is located 0 bytes inside of [ 14.093446] freed 16-byte region [ffff888102817b40, ffff888102817b50) [ 14.094091] [ 14.094293] The buggy address belongs to the physical page: [ 14.094779] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102817 [ 14.095644] flags: 0x200000000000000(node=0|zone=2) [ 14.096026] page_type: f5(slab) [ 14.096386] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 14.096899] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 14.097879] page dumped because: kasan: bad access detected [ 14.098247] [ 14.098404] Memory state around the buggy address: [ 14.098691] ffff888102817a00: 00 02 fc fc 00 05 fc fc 00 02 fc fc 00 02 fc fc [ 14.099910] ffff888102817a80: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 14.100268] >ffff888102817b00: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 14.100723] ^ [ 14.100952] ffff888102817b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.103435] ffff888102817c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.104005] ==================================================================