Date
Feb. 5, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-armv7 | |
| qemu-x86_64 |
[ 145.612653] ================================================================== [ 145.613779] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0xd0/0x1d0 [ 145.614462] Read of size 1 at addr c4fcf908 by task kunit_try_catch/157 [ 145.615203] [ 145.615437] CPU: 0 PID: 157 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 145.616374] Hardware name: Generic DT based system [ 145.616935] unwind_backtrace from show_stack+0x18/0x1c [ 145.617633] show_stack from dump_stack_lvl+0x58/0x70 [ 145.618366] dump_stack_lvl from print_report+0x164/0x51c [ 145.619203] print_report from kasan_report+0xc8/0x104 [ 145.620040] kasan_report from kmalloc_uaf+0xd0/0x1d0 [ 145.620731] kmalloc_uaf from kunit_try_run_case+0x11c/0x2e4 [ 145.621456] kunit_try_run_case from kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 145.622457] kunit_generic_run_threadfn_adapter from kthread+0x184/0x1a8 [ 145.623425] kthread from ret_from_fork+0x14/0x30 [ 145.624005] Exception stack(0xf9fe3fb0 to 0xf9fe3ff8) [ 145.624577] 3fa0: 00000000 00000000 00000000 00000000 [ 145.625496] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 145.626963] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 145.628304] [ 145.628533] Allocated by task 157: [ 145.628921] kasan_set_track+0x3c/0x5c [ 145.629473] __kasan_kmalloc+0x8c/0x94 [ 145.629996] kmalloc_uaf+0xa0/0x1d0 [ 145.630424] kunit_try_run_case+0x11c/0x2e4 [ 145.631112] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 145.632098] kthread+0x184/0x1a8 [ 145.632487] ret_from_fork+0x14/0x30 [ 145.633037] [ 145.633274] Freed by task 157: [ 145.633760] kasan_set_track+0x3c/0x5c [ 145.634331] kasan_save_free_info+0x30/0x3c [ 145.635016] __kasan_slab_free+0xdc/0x124 [ 145.635560] __kmem_cache_free+0x140/0x2a8 [ 145.636132] kmalloc_uaf+0xbc/0x1d0 [ 145.636590] kunit_try_run_case+0x11c/0x2e4 [ 145.637187] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 145.638089] kthread+0x184/0x1a8 [ 145.638503] ret_from_fork+0x14/0x30 [ 145.639012] [ 145.639283] The buggy address belongs to the object at c4fcf900 [ 145.639283] which belongs to the cache kmalloc-64 of size 64 [ 145.640714] The buggy address is located 8 bytes inside of [ 145.640714] freed 64-byte region [c4fcf900, c4fcf940) [ 145.642020] [ 145.642299] The buggy address belongs to the physical page: [ 145.642825] page:8516b471 refcount:1 mapcount:0 mapping:00000000 index:0x0 pfn:0x44fcf [ 145.643751] flags: 0x800(slab|zone=0) [ 145.644288] page_type: 0xffffffff() [ 145.644817] raw: 00000800 c4801200 00000122 00000000 00000000 80200020 ffffffff 00000001 [ 145.645709] raw: 00000000 [ 145.646170] page dumped because: kasan: bad access detected [ 145.646658] [ 145.647009] Memory state around the buggy address: [ 145.647559] c4fcf800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 145.648335] c4fcf880: 00 00 07 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 145.649137] >c4fcf900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 145.649886] ^ [ 145.650256] c4fcf980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 145.651170] c4fcfa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 145.651793] ==================================================================
[ 48.469711] ================================================================== [ 48.470631] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0xd5/0x1d0 [ 48.471595] Read of size 1 at addr ffff88810273e0a8 by task kunit_try_catch/180 [ 48.472344] [ 48.472632] CPU: 1 PID: 180 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 48.474220] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 48.475084] Call Trace: [ 48.475530] <TASK> [ 48.476004] dump_stack_lvl+0x4e/0x90 [ 48.476627] print_report+0xd2/0x660 [ 48.477241] ? __virt_addr_valid+0x156/0x1e0 [ 48.477824] ? kasan_complete_mode_report_info+0x64/0x200 [ 48.478430] kasan_report+0xff/0x140 [ 48.478895] ? kmalloc_uaf+0xd5/0x1d0 [ 48.479372] ? kmalloc_uaf+0xd5/0x1d0 [ 48.479847] __asan_load1+0x66/0x70 [ 48.480918] kmalloc_uaf+0xd5/0x1d0 [ 48.481372] ? __pfx_kmalloc_uaf+0x10/0x10 [ 48.482047] ? __schedule+0x70b/0x1190 [ 48.482599] ? ktime_get_ts64+0x118/0x140 [ 48.483339] kunit_try_run_case+0x126/0x290 [ 48.483930] ? __pfx_kunit_try_run_case+0x10/0x10 [ 48.484638] ? __kasan_check_write+0x18/0x20 [ 48.485354] ? trace_preempt_on+0x20/0xa0 [ 48.485784] ? __kthread_parkme+0x4f/0xd0 [ 48.486407] ? preempt_count_sub+0x50/0x80 [ 48.487059] ? __pfx_kunit_try_run_case+0x10/0x10 [ 48.487685] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 48.488748] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 48.489338] kthread+0x19e/0x1e0 [ 48.489850] ? __pfx_kthread+0x10/0x10 [ 48.490454] ret_from_fork+0x41/0x70 [ 48.491101] ? __pfx_kthread+0x10/0x10 [ 48.491648] ret_from_fork_asm+0x1b/0x30 [ 48.492361] </TASK> [ 48.492758] [ 48.493039] Allocated by task 180: [ 48.493524] kasan_save_stack+0x3c/0x60 [ 48.494108] kasan_set_track+0x29/0x40 [ 48.494672] kasan_save_alloc_info+0x22/0x30 [ 48.495272] __kasan_kmalloc+0xb7/0xc0 [ 48.495885] kmalloc_trace+0x4c/0xb0 [ 48.496394] kmalloc_uaf+0x9d/0x1d0 [ 48.496949] kunit_try_run_case+0x126/0x290 [ 48.497491] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 48.498215] kthread+0x19e/0x1e0 [ 48.498818] ret_from_fork+0x41/0x70 [ 48.499371] ret_from_fork_asm+0x1b/0x30 [ 48.499913] [ 48.500099] Freed by task 180: [ 48.500350] kasan_save_stack+0x3c/0x60 [ 48.500779] kasan_set_track+0x29/0x40 [ 48.501141] kasan_save_free_info+0x2f/0x50 [ 48.501541] ____kasan_slab_free+0x172/0x1d0 [ 48.502072] __kasan_slab_free+0x16/0x20 [ 48.502627] __kmem_cache_free+0x190/0x310 [ 48.503321] kfree+0x7c/0x120 [ 48.503814] kmalloc_uaf+0xbd/0x1d0 [ 48.504365] kunit_try_run_case+0x126/0x290 [ 48.505093] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 48.506043] kthread+0x19e/0x1e0 [ 48.506610] ret_from_fork+0x41/0x70 [ 48.508281] ret_from_fork_asm+0x1b/0x30 [ 48.509415] [ 48.509841] The buggy address belongs to the object at ffff88810273e0a0 [ 48.509841] which belongs to the cache kmalloc-16 of size 16 [ 48.511112] The buggy address is located 8 bytes inside of [ 48.511112] freed 16-byte region [ffff88810273e0a0, ffff88810273e0b0) [ 48.511887] [ 48.512173] The buggy address belongs to the physical page: [ 48.513611] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10273e [ 48.514944] flags: 0x200000000000800(slab|node=0|zone=2) [ 48.515633] page_type: 0xffffffff() [ 48.516144] raw: 0200000000000800 ffff8881000413c0 dead000000000122 0000000000000000 [ 48.516919] raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 [ 48.518198] page dumped because: kasan: bad access detected [ 48.519005] [ 48.519338] Memory state around the buggy address: [ 48.519989] ffff88810273df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.520953] ffff88810273e000: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 48.521582] >ffff88810273e080: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 48.522768] ^ [ 48.523467] ffff88810273e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.524167] ffff88810273e180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.524996] ==================================================================