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Date
Dec. 4, 2024, 3:07 p.m.

Environment
qemu-arm64
qemu-x86_64 

[   30.931180] ==================================================================
[   30.932514] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8
[   30.933457] Read of size 1 at addr fff00000c5e70000 by task kunit_try_catch/136
[   30.934549] 
[   30.935106] CPU: 0 UID: 0 PID: 136 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241204 #1
[   30.936709] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.937433] Hardware name: linux,dummy-virt (DT)
[   30.938294] Call trace:
[   30.938845]  show_stack+0x20/0x38 (C)
[   30.940253]  dump_stack_lvl+0x8c/0xd0
[   30.941284]  print_report+0x118/0x5e0
[   30.942064]  kasan_report+0xc8/0x118
[   30.943015]  __asan_report_load1_noabort+0x20/0x30
[   30.943822]  kmalloc_large_uaf+0x2cc/0x2f8
[   30.944494]  kunit_try_run_case+0x14c/0x3d0
[   30.945173]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.946001]  kthread+0x24c/0x2d0
[   30.946924]  ret_from_fork+0x10/0x20
[   30.947614] 
[   30.948078] The buggy address belongs to the physical page:
[   30.948896] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105e70
[   30.949833] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.951303] raw: 0bfffe0000000000 ffffc1ffc3179d08 fff00000da4e2f80 0000000000000000
[   30.952289] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   30.953243] page dumped because: kasan: bad access detected
[   30.954241] 
[   30.954818] Memory state around the buggy address:
[   30.955470]  fff00000c5e6ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.956330]  fff00000c5e6ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.957552] >fff00000c5e70000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.958865]                    ^
[   30.959450]  fff00000c5e70080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.960261]  fff00000c5e70100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.961196] ==================================================================
Metadata Full log Test run details 

[   21.634644] ==================================================================
[   21.635911] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f3/0x340
[   21.637099] Read of size 1 at addr ffff888102b2c000 by task kunit_try_catch/156
[   21.637934] 
[   21.638356] CPU: 1 UID: 0 PID: 156 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241204 #1
[   21.639309] Tainted: [B]=BAD_PAGE, [N]=TEST
[   21.639683] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   21.640540] Call Trace:
[   21.640931]  <TASK>
[   21.641442]  dump_stack_lvl+0x73/0xb0
[   21.642023]  print_report+0xd1/0x640
[   21.642563]  ? __virt_addr_valid+0x1db/0x2d0
[   21.643007]  ? kasan_addr_to_slab+0x11/0xa0
[   21.643460]  kasan_report+0x102/0x140
[   21.643945]  ? kmalloc_large_uaf+0x2f3/0x340
[   21.644392]  ? kmalloc_large_uaf+0x2f3/0x340
[   21.644981]  __asan_report_load1_noabort+0x18/0x20
[   21.645675]  kmalloc_large_uaf+0x2f3/0x340
[   21.646081]  ? __pfx_kmalloc_large_uaf+0x10/0x10
[   21.646663]  ? __schedule+0xc3e/0x2790
[   21.647051]  ? __pfx_read_tsc+0x10/0x10
[   21.647562]  ? ktime_get_ts64+0x86/0x230
[   21.648185]  kunit_try_run_case+0x1b3/0x490
[   21.648701]  ? __pfx_kunit_try_run_case+0x10/0x10
[   21.649173]  ? _raw_spin_lock_irqsave+0xa2/0x110
[   21.649798]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   21.650526]  ? __kthread_parkme+0x82/0x160
[   21.650936]  ? preempt_count_sub+0x50/0x80
[   21.651551]  ? __pfx_kunit_try_run_case+0x10/0x10
[   21.652127]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   21.652846]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   21.653514]  kthread+0x257/0x310
[   21.654014]  ? __pfx_kthread+0x10/0x10
[   21.654493]  ret_from_fork+0x41/0x80
[   21.655001]  ? __pfx_kthread+0x10/0x10
[   21.655465]  ret_from_fork_asm+0x1a/0x30
[   21.655979]  </TASK>
[   21.656380] 
[   21.656678] The buggy address belongs to the physical page:
[   21.657296] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b2c
[   21.658103] flags: 0x200000000000000(node=0|zone=2)
[   21.658736] raw: 0200000000000000 ffffea00040acc08 ffff888154b3f040 0000000000000000
[   21.659599] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   21.660372] page dumped because: kasan: bad access detected
[   21.661001] 
[   21.661177] Memory state around the buggy address:
[   21.661858]  ffff888102b2bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   21.662538]  ffff888102b2bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   21.663351] >ffff888102b2c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   21.663943]                    ^
[   21.664378]  ffff888102b2c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   21.665055]  ffff888102b2c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   21.665703] ==================================================================
Metadata Full log Test run details