Date
Feb. 5, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-armv7 | |
| qemu-x86_64 |
[ 144.524339] ================================================================== [ 144.526095] BUG: KASAN: use-after-free in pagealloc_uaf+0xc8/0x1cc [ 144.526985] Read of size 1 at addr c8f40000 by task kunit_try_catch/125 [ 144.527519] [ 144.527735] CPU: 0 PID: 125 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 144.529318] Hardware name: Generic DT based system [ 144.530379] unwind_backtrace from show_stack+0x18/0x1c [ 144.531227] show_stack from dump_stack_lvl+0x58/0x70 [ 144.531943] dump_stack_lvl from print_report+0x164/0x51c [ 144.532836] print_report from kasan_report+0xc8/0x104 [ 144.533598] kasan_report from pagealloc_uaf+0xc8/0x1cc [ 144.534476] pagealloc_uaf from kunit_try_run_case+0x11c/0x2e4 [ 144.535521] kunit_try_run_case from kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 144.536904] kunit_generic_run_threadfn_adapter from kthread+0x184/0x1a8 [ 144.537725] kthread from ret_from_fork+0x14/0x30 [ 144.538330] Exception stack(0xf9ef3fb0 to 0xf9ef3ff8) [ 144.538932] 3fa0: 00000000 00000000 00000000 00000000 [ 144.539780] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 144.540618] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 144.541381] [ 144.541631] The buggy address belongs to the physical page: [ 144.542124] page:255cd0fe refcount:0 mapcount:0 mapping:00000000 index:0x0 pfn:0x48f40 [ 144.543188] flags: 0x0(zone=0) [ 144.543542] page_type: 0xffffff7f(buddy) [ 144.544264] raw: 00000000 c40f8ef8 c40f8ef8 00000000 00000000 00000006 ffffff7f 00000000 [ 144.545081] raw: 00000000 [ 144.545439] page dumped because: kasan: bad access detected [ 144.546194] [ 144.546481] Memory state around the buggy address: [ 144.547301] c8f3ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 144.548175] c8f3ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 144.548837] >c8f40000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 144.549626] ^ [ 144.549934] c8f40080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 144.550770] c8f40100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 144.551494] ==================================================================
[ 46.988664] ================================================================== [ 46.990167] BUG: KASAN: use-after-free in pagealloc_uaf+0xe9/0x1f0 [ 46.990866] Read of size 1 at addr ffff888102a30000 by task kunit_try_catch/148 [ 46.991724] [ 46.992046] CPU: 0 PID: 148 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 46.992836] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 46.993824] Call Trace: [ 46.994228] <TASK> [ 46.994590] dump_stack_lvl+0x4e/0x90 [ 46.995083] print_report+0xd2/0x660 [ 46.995680] ? __virt_addr_valid+0x156/0x1e0 [ 46.996356] ? kasan_addr_to_slab+0x11/0xb0 [ 46.996868] kasan_report+0xff/0x140 [ 46.997453] ? pagealloc_uaf+0xe9/0x1f0 [ 46.998146] ? pagealloc_uaf+0xe9/0x1f0 [ 46.998634] __asan_load1+0x66/0x70 [ 46.999269] pagealloc_uaf+0xe9/0x1f0 [ 46.999877] ? __pfx_pagealloc_uaf+0x10/0x10 [ 47.000340] ? __pfx_pagealloc_uaf+0x10/0x10 [ 47.000990] ? kunit_try_run_case+0x11b/0x290 [ 47.001638] kunit_try_run_case+0x126/0x290 [ 47.002221] ? __pfx_kunit_try_run_case+0x10/0x10 [ 47.002925] ? __kasan_check_write+0x18/0x20 [ 47.003445] ? trace_preempt_on+0x20/0xa0 [ 47.004068] ? __kthread_parkme+0x4f/0xd0 [ 47.004679] ? preempt_count_sub+0x50/0x80 [ 47.005162] ? __pfx_kunit_try_run_case+0x10/0x10 [ 47.005902] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 47.006659] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 47.007450] kthread+0x19e/0x1e0 [ 47.007952] ? __pfx_kthread+0x10/0x10 [ 47.008590] ret_from_fork+0x41/0x70 [ 47.009128] ? __pfx_kthread+0x10/0x10 [ 47.009701] ret_from_fork_asm+0x1b/0x30 [ 47.010318] </TASK> [ 47.010628] [ 47.011005] The buggy address belongs to the physical page: [ 47.011620] page:(____ptrval____) refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a30 [ 47.012448] flags: 0x200000000000000(node=0|zone=2) [ 47.013096] page_type: 0xffffff7f(buddy) [ 47.013684] raw: 0200000000000000 ffff88817fffab60 ffff88817fffab60 0000000000000000 [ 47.014511] raw: 0000000000000000 0000000000000004 00000000ffffff7f 0000000000000000 [ 47.015270] page dumped because: kasan: bad access detected [ 47.015917] [ 47.016235] Memory state around the buggy address: [ 47.016710] ffff888102a2ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 47.017480] ffff888102a2ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 47.018332] >ffff888102a30000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 47.018926] ^ [ 47.019376] ffff888102a30080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 47.020164] ffff888102a30100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 47.020777] ==================================================================