Date
Nov. 28, 2024, 2:36 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.058715] ================================================================== [ 31.060028] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 31.060755] Read of size 1 at addr fff00000c5d76c80 by task kunit_try_catch/180 [ 31.061927] [ 31.062306] CPU: 0 UID: 0 PID: 180 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241128 #1 [ 31.063285] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.063980] Hardware name: linux,dummy-virt (DT) [ 31.064460] Call trace: [ 31.064806] show_stack+0x20/0x38 (C) [ 31.065574] dump_stack_lvl+0x8c/0xd0 [ 31.066276] print_report+0x118/0x5e0 [ 31.066937] kasan_report+0xc8/0x118 [ 31.067497] __kasan_check_byte+0x54/0x70 [ 31.068210] kfree_sensitive+0x30/0xb0 [ 31.068863] kmalloc_double_kzfree+0x168/0x308 [ 31.069654] kunit_try_run_case+0x14c/0x3d0 [ 31.070336] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.071106] kthread+0x24c/0x2d0 [ 31.071753] ret_from_fork+0x10/0x20 [ 31.072268] [ 31.072615] Allocated by task 180: [ 31.073127] kasan_save_stack+0x3c/0x68 [ 31.073635] kasan_save_track+0x20/0x40 [ 31.074145] kasan_save_alloc_info+0x40/0x58 [ 31.074764] __kasan_kmalloc+0xd4/0xd8 [ 31.075326] __kmalloc_cache_noprof+0x15c/0x3c0 [ 31.075890] kmalloc_double_kzfree+0xb8/0x308 [ 31.076607] kunit_try_run_case+0x14c/0x3d0 [ 31.077474] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.078132] kthread+0x24c/0x2d0 [ 31.078664] ret_from_fork+0x10/0x20 [ 31.079214] [ 31.079530] Freed by task 180: [ 31.079914] kasan_save_stack+0x3c/0x68 [ 31.080506] kasan_save_track+0x20/0x40 [ 31.081914] kasan_save_free_info+0x4c/0x78 [ 31.082431] __kasan_slab_free+0x6c/0x98 [ 31.083011] kfree+0x114/0x3c8 [ 31.083528] kfree_sensitive+0x80/0xb0 [ 31.084059] kmalloc_double_kzfree+0x11c/0x308 [ 31.084943] kunit_try_run_case+0x14c/0x3d0 [ 31.085505] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.086047] kthread+0x24c/0x2d0 [ 31.086851] ret_from_fork+0x10/0x20 [ 31.087315] [ 31.087688] The buggy address belongs to the object at fff00000c5d76c80 [ 31.087688] which belongs to the cache kmalloc-16 of size 16 [ 31.088855] The buggy address is located 0 bytes inside of [ 31.088855] freed 16-byte region [fff00000c5d76c80, fff00000c5d76c90) [ 31.090254] [ 31.090595] The buggy address belongs to the physical page: [ 31.091281] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d76 [ 31.092073] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.092810] page_type: f5(slab) [ 31.093545] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 31.094390] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 31.095185] page dumped because: kasan: bad access detected [ 31.095801] [ 31.096157] Memory state around the buggy address: [ 31.096682] fff00000c5d76b80: fa fb fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 31.097795] fff00000c5d76c00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.098557] >fff00000c5d76c80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.099525] ^ [ 31.100021] fff00000c5d76d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.100871] fff00000c5d76d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.102452] ==================================================================
[ 21.978118] ================================================================== [ 21.979498] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19d/0x360 [ 21.980185] Read of size 1 at addr ffff888101094f80 by task kunit_try_catch/200 [ 21.980928] [ 21.981250] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241128 #1 [ 21.982093] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.983052] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 21.983729] Call Trace: [ 21.984083] <TASK> [ 21.984667] dump_stack_lvl+0x73/0xb0 [ 21.985147] print_report+0xd1/0x640 [ 21.985738] ? __virt_addr_valid+0x1db/0x2d0 [ 21.986620] ? kasan_complete_mode_report_info+0x64/0x200 [ 21.987081] kasan_report+0x102/0x140 [ 21.987730] ? kmalloc_double_kzfree+0x19d/0x360 [ 21.988540] ? kmalloc_double_kzfree+0x19d/0x360 [ 21.989009] ? kmalloc_double_kzfree+0x19d/0x360 [ 21.989693] __kasan_check_byte+0x3d/0x50 [ 21.990130] kfree_sensitive+0x22/0x90 [ 21.990959] kmalloc_double_kzfree+0x19d/0x360 [ 21.991814] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 21.992270] ? __schedule+0xc3e/0x2790 [ 21.992762] ? __pfx_read_tsc+0x10/0x10 [ 21.993138] ? ktime_get_ts64+0x84/0x230 [ 21.993777] kunit_try_run_case+0x1b3/0x490 [ 21.994380] ? __pfx_kunit_try_run_case+0x10/0x10 [ 21.995544] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 21.996131] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 21.996713] ? __kthread_parkme+0x82/0x160 [ 21.997459] ? preempt_count_sub+0x50/0x80 [ 21.997930] ? __pfx_kunit_try_run_case+0x10/0x10 [ 21.998815] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 21.999705] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.000471] kthread+0x257/0x310 [ 22.000647] ? __pfx_kthread+0x10/0x10 [ 22.000823] ret_from_fork+0x41/0x80 [ 22.000997] ? __pfx_kthread+0x10/0x10 [ 22.001504] ret_from_fork_asm+0x1a/0x30 [ 22.002356] </TASK> [ 22.002551] [ 22.002702] Allocated by task 200: [ 22.003646] kasan_save_stack+0x3d/0x60 [ 22.004481] kasan_save_track+0x18/0x40 [ 22.005402] kasan_save_alloc_info+0x3b/0x50 [ 22.006255] __kasan_kmalloc+0xb7/0xc0 [ 22.006560] __kmalloc_cache_noprof+0x184/0x410 [ 22.007079] kmalloc_double_kzfree+0xaa/0x360 [ 22.007821] kunit_try_run_case+0x1b3/0x490 [ 22.008197] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.008825] kthread+0x257/0x310 [ 22.009202] ret_from_fork+0x41/0x80 [ 22.010059] ret_from_fork_asm+0x1a/0x30 [ 22.010701] [ 22.010845] Freed by task 200: [ 22.011153] kasan_save_stack+0x3d/0x60 [ 22.011693] kasan_save_track+0x18/0x40 [ 22.012494] kasan_save_free_info+0x3f/0x60 [ 22.012794] __kasan_slab_free+0x56/0x70 [ 22.013424] kfree+0x123/0x3f0 [ 22.014133] kfree_sensitive+0x67/0x90 [ 22.014570] kmalloc_double_kzfree+0x12c/0x360 [ 22.015073] kunit_try_run_case+0x1b3/0x490 [ 22.015734] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.016631] kthread+0x257/0x310 [ 22.017063] ret_from_fork+0x41/0x80 [ 22.017637] ret_from_fork_asm+0x1a/0x30 [ 22.018038] [ 22.018288] The buggy address belongs to the object at ffff888101094f80 [ 22.018288] which belongs to the cache kmalloc-16 of size 16 [ 22.019625] The buggy address is located 0 bytes inside of [ 22.019625] freed 16-byte region [ffff888101094f80, ffff888101094f90) [ 22.021145] [ 22.021409] The buggy address belongs to the physical page: [ 22.021829] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101094 [ 22.022617] flags: 0x200000000000000(node=0|zone=2) [ 22.023253] page_type: f5(slab) [ 22.023982] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 22.024861] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 22.025694] page dumped because: kasan: bad access detected [ 22.026224] [ 22.026749] Memory state around the buggy address: [ 22.027154] ffff888101094e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.027992] ffff888101094f00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.029003] >ffff888101094f80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.029732] ^ [ 22.030297] ffff888101095000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 22.031445] ffff888101095080: 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 22.032642] ==================================================================