Date
March 19, 2025, 10:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.456239] ================================================================== [ 34.456499] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 34.456673] Read of size 1 at addr fff00000c5d8b048 by task kunit_try_catch/186 [ 34.456921] [ 34.457097] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT [ 34.457529] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.457679] Hardware name: linux,dummy-virt (DT) [ 34.457782] Call trace: [ 34.457852] show_stack+0x20/0x38 (C) [ 34.458003] dump_stack_lvl+0x8c/0xd0 [ 34.458166] print_report+0x118/0x5f0 [ 34.458302] kasan_report+0xc8/0x118 [ 34.458462] __asan_report_load1_noabort+0x20/0x30 [ 34.458617] kmalloc_uaf+0x300/0x338 [ 34.458759] kunit_try_run_case+0x14c/0x3d0 [ 34.458914] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.459129] kthread+0x318/0x618 [ 34.459435] ret_from_fork+0x10/0x20 [ 34.459607] [ 34.459683] Allocated by task 186: [ 34.459819] kasan_save_stack+0x3c/0x68 [ 34.459952] kasan_save_track+0x20/0x40 [ 34.460129] kasan_save_alloc_info+0x40/0x58 [ 34.460299] __kasan_kmalloc+0xd4/0xd8 [ 34.460460] __kmalloc_cache_noprof+0x15c/0x3c0 [ 34.460617] kmalloc_uaf+0xb8/0x338 [ 34.460870] kunit_try_run_case+0x14c/0x3d0 [ 34.461170] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.461375] kthread+0x318/0x618 [ 34.461492] ret_from_fork+0x10/0x20 [ 34.461599] [ 34.461662] Freed by task 186: [ 34.461760] kasan_save_stack+0x3c/0x68 [ 34.461889] kasan_save_track+0x20/0x40 [ 34.462558] kasan_save_free_info+0x4c/0x78 [ 34.462719] __kasan_slab_free+0x6c/0x98 [ 34.462843] kfree+0x214/0x3c8 [ 34.463047] kmalloc_uaf+0x11c/0x338 [ 34.463746] kunit_try_run_case+0x14c/0x3d0 [ 34.463897] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.464152] kthread+0x318/0x618 [ 34.464521] ret_from_fork+0x10/0x20 [ 34.464792] [ 34.464878] The buggy address belongs to the object at fff00000c5d8b040 [ 34.464878] which belongs to the cache kmalloc-16 of size 16 [ 34.465078] The buggy address is located 8 bytes inside of [ 34.465078] freed 16-byte region [fff00000c5d8b040, fff00000c5d8b050) [ 34.465849] [ 34.465918] The buggy address belongs to the physical page: [ 34.466025] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d8b [ 34.466215] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.466425] page_type: f5(slab) [ 34.466542] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 34.466706] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 34.466849] page dumped because: kasan: bad access detected [ 34.466964] [ 34.467024] Memory state around the buggy address: [ 34.467727] fff00000c5d8af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.468015] fff00000c5d8af80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc [ 34.468878] >fff00000c5d8b000: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 34.469186] ^ [ 34.469317] fff00000c5d8b080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.469497] fff00000c5d8b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.469634] ==================================================================
[ 22.138448] ================================================================== [ 22.139548] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 22.140226] Read of size 1 at addr ffff888100a7a988 by task kunit_try_catch/205 [ 22.140760] [ 22.141104] CPU: 0 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 22.141261] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.141294] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.141349] Call Trace: [ 22.141382] <TASK> [ 22.141419] dump_stack_lvl+0x73/0xb0 [ 22.141496] print_report+0xd1/0x660 [ 22.141556] ? __virt_addr_valid+0x1db/0x2d0 [ 22.141680] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.141885] kasan_report+0x104/0x140 [ 22.141972] ? kmalloc_uaf+0x320/0x380 [ 22.142039] ? kmalloc_uaf+0x320/0x380 [ 22.142145] __asan_report_load1_noabort+0x18/0x20 [ 22.142207] kmalloc_uaf+0x320/0x380 [ 22.142263] ? __pfx_kmalloc_uaf+0x10/0x10 [ 22.142323] ? __schedule+0xd46/0x29c0 [ 22.142383] ? __pfx_read_tsc+0x10/0x10 [ 22.142440] ? ktime_get_ts64+0x86/0x240 [ 22.142509] kunit_try_run_case+0x1b2/0x490 [ 22.142579] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.142637] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.142698] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.142758] ? __kthread_parkme+0x82/0x160 [ 22.142819] ? preempt_count_sub+0x50/0x80 [ 22.142889] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.142956] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.143023] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.143089] kthread+0x323/0x710 [ 22.143280] ? trace_preempt_on+0x20/0xc0 [ 22.143325] ? __pfx_kthread+0x10/0x10 [ 22.143358] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.143389] ? calculate_sigpending+0x7b/0xa0 [ 22.143420] ? __pfx_kthread+0x10/0x10 [ 22.143452] ret_from_fork+0x41/0x80 [ 22.143483] ? __pfx_kthread+0x10/0x10 [ 22.143515] ret_from_fork_asm+0x1a/0x30 [ 22.143562] </TASK> [ 22.143578] [ 22.162237] Allocated by task 205: [ 22.162748] kasan_save_stack+0x3d/0x60 [ 22.163465] kasan_save_track+0x18/0x40 [ 22.164073] kasan_save_alloc_info+0x3b/0x50 [ 22.164798] __kasan_kmalloc+0xb7/0xc0 [ 22.165377] __kmalloc_cache_noprof+0x183/0x410 [ 22.166083] kmalloc_uaf+0xaa/0x380 [ 22.166465] kunit_try_run_case+0x1b2/0x490 [ 22.166930] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.167481] kthread+0x323/0x710 [ 22.167780] ret_from_fork+0x41/0x80 [ 22.168342] ret_from_fork_asm+0x1a/0x30 [ 22.168763] [ 22.169434] Freed by task 205: [ 22.170087] kasan_save_stack+0x3d/0x60 [ 22.170622] kasan_save_track+0x18/0x40 [ 22.171150] kasan_save_free_info+0x3f/0x60 [ 22.171947] __kasan_slab_free+0x56/0x70 [ 22.172406] kfree+0x222/0x3f0 [ 22.172991] kmalloc_uaf+0x12c/0x380 [ 22.173471] kunit_try_run_case+0x1b2/0x490 [ 22.174349] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.175106] kthread+0x323/0x710 [ 22.175501] ret_from_fork+0x41/0x80 [ 22.176190] ret_from_fork_asm+0x1a/0x30 [ 22.176598] [ 22.177071] The buggy address belongs to the object at ffff888100a7a980 [ 22.177071] which belongs to the cache kmalloc-16 of size 16 [ 22.178260] The buggy address is located 8 bytes inside of [ 22.178260] freed 16-byte region [ffff888100a7a980, ffff888100a7a990) [ 22.179545] [ 22.179870] The buggy address belongs to the physical page: [ 22.180320] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100a7a [ 22.181335] flags: 0x200000000000000(node=0|zone=2) [ 22.182038] page_type: f5(slab) [ 22.182511] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 22.183331] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 22.184148] page dumped because: kasan: bad access detected [ 22.184574] [ 22.185366] Memory state around the buggy address: [ 22.186482] ffff888100a7a880: 00 02 fc fc 00 05 fc fc 00 02 fc fc 00 02 fc fc [ 22.187152] ffff888100a7a900: 00 02 fc fc 00 02 fc fc 00 04 fc fc fa fb fc fc [ 22.187839] >ffff888100a7a980: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.188384] ^ [ 22.188705] ffff888100a7aa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.189463] ffff888100a7aa80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.190229] ==================================================================