Date
July 22, 2025, 5:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 30.092858] ================================================================== [ 30.092991] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 30.093045] Read of size 1 at addr fff00000c9ae4000 by task kunit_try_catch/179 [ 30.093092] [ 30.093171] CPU: 1 UID: 0 PID: 179 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250722 #1 PREEMPT [ 30.093286] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 30.093502] Hardware name: linux,dummy-virt (DT) [ 30.093535] Call trace: [ 30.093602] show_stack+0x20/0x38 (C) [ 30.093727] dump_stack_lvl+0x8c/0xd0 [ 30.093856] print_report+0x118/0x5e8 [ 30.093954] kasan_report+0xdc/0x128 [ 30.094099] __asan_report_load1_noabort+0x20/0x30 [ 30.094211] kmalloc_large_uaf+0x2cc/0x2f8 [ 30.094320] kunit_try_run_case+0x170/0x3f0 [ 30.094431] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.094500] kthread+0x328/0x630 [ 30.094541] ret_from_fork+0x10/0x20 [ 30.094955] [ 30.095032] The buggy address belongs to the physical page: [ 30.095131] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109ae4 [ 30.095270] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 30.095455] raw: 0bfffe0000000000 ffffc1ffc326ba08 fff00000da472d00 0000000000000000 [ 30.095568] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 30.095647] page dumped because: kasan: bad access detected [ 30.095727] [ 30.095745] Memory state around the buggy address: [ 30.095775] fff00000c9ae3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.096169] fff00000c9ae3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.096268] >fff00000c9ae4000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 30.096369] ^ [ 30.096397] fff00000c9ae4080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 30.096437] fff00000c9ae4100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 30.096882] ==================================================================
[ 24.658371] ================================================================== [ 24.659049] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 24.659583] Read of size 1 at addr ffff888104ab8000 by task kunit_try_catch/196 [ 24.660685] [ 24.660819] CPU: 1 UID: 0 PID: 196 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250722 #1 PREEMPT(voluntary) [ 24.660885] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.660898] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.660919] Call Trace: [ 24.660931] <TASK> [ 24.660946] dump_stack_lvl+0x73/0xb0 [ 24.660977] print_report+0xd1/0x640 [ 24.661001] ? __virt_addr_valid+0x1db/0x2d0 [ 24.661023] ? kmalloc_large_uaf+0x2f1/0x340 [ 24.661043] ? kasan_addr_to_slab+0x11/0xa0 [ 24.661064] ? kmalloc_large_uaf+0x2f1/0x340 [ 24.661085] kasan_report+0x141/0x180 [ 24.661108] ? kmalloc_large_uaf+0x2f1/0x340 [ 24.661133] __asan_report_load1_noabort+0x18/0x20 [ 24.661158] kmalloc_large_uaf+0x2f1/0x340 [ 24.661316] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 24.661341] ? __pfx_queued_spin_lock_slowpath+0x10/0x10 [ 24.661371] ? __pfx_read_tsc+0x10/0x10 [ 24.661393] ? ktime_get_ts64+0x86/0x230 [ 24.661418] kunit_try_run_case+0x1a5/0x480 [ 24.661530] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.661554] ? _raw_spin_lock_irqsave+0xf9/0x100 [ 24.661578] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.661604] ? __kthread_parkme+0x82/0x180 [ 24.661624] ? preempt_count_sub+0x50/0x80 [ 24.661646] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.661670] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.661696] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.661719] kthread+0x337/0x6f0 [ 24.661739] ? trace_preempt_on+0x20/0xc0 [ 24.661762] ? __pfx_kthread+0x10/0x10 [ 24.661782] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.661805] ? calculate_sigpending+0x7b/0xa0 [ 24.661840] ? __pfx_kthread+0x10/0x10 [ 24.661862] ret_from_fork+0x116/0x1d0 [ 24.661882] ? __pfx_kthread+0x10/0x10 [ 24.661902] ret_from_fork_asm+0x1a/0x30 [ 24.661933] </TASK> [ 24.661944] [ 24.671178] The buggy address belongs to the physical page: [ 24.671367] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104ab8 [ 24.671727] flags: 0x200000000000000(node=0|zone=2) [ 24.672094] raw: 0200000000000000 ffffea000412af08 ffff88815b139fc0 0000000000000000 [ 24.672720] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 24.672965] page dumped because: kasan: bad access detected [ 24.673532] [ 24.673640] Memory state around the buggy address: [ 24.673893] ffff888104ab7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.674238] ffff888104ab7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.674578] >ffff888104ab8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.674859] ^ [ 24.675024] ffff888104ab8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.675333] ffff888104ab8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.675680] ==================================================================