Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.249527] BUG: Bad rss-counter state mm:0000000052367872 type:MM_FILEPAGES val:33 [ 32.250255] BUG: Bad rss-counter state mm:0000000052367872 type:MM_ANONPAGES val:22 [ 32.471152] ================================================================== [ 32.475807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.476395] Read of size 8 at addr ffff88800c4fc4e0 by task sshd/219 [ 32.476875] [ 32.477016] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.477552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.478156] Call Trace: [ 32.478360] [ 32.478542] dump_stack_lvl+0x91/0xf0 [ 32.478853] print_report+0xcc/0x620 [ 32.479166] ? __virt_addr_valid+0x102/0x340 [ 32.479550] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.479937] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.480330] kasan_report+0xbe/0xf0 [ 32.480627] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.481012] vma_interval_tree_remove+0xc75/0xec0 [ 32.481389] vma_prepare+0xc54/0x11a0 [ 32.481725] __split_vma+0x5af/0x950 [ 32.482076] ? __pfx___split_vma+0x10/0x10 [ 32.482458] ? find_held_lock+0x2c/0x110 [ 32.482835] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.483234] ? lock_is_held_type+0x9f/0x120 [ 32.483634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.484247] ? mtree_range_walk+0x632/0x900 [ 32.484605] ? mas_walk+0x5c7/0x7c0 [ 32.484909] do_vmi_munmap+0x1f1/0x2b0 [ 32.485537] mmap_region+0x1f9/0x2660 [ 32.486398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.487311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.488647] ? __pfx_lock_acquire+0x10/0x10 [ 32.489606] ? __pfx_mmap_region+0x10/0x10 [ 32.490559] ? security_mmap_addr+0x7d/0xa0 [ 32.491552] ? get_unmapped_area+0x1f5/0x3f0 [ 32.492841] do_mmap+0x854/0xf00 [ 32.493428] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.494654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.495424] ksys_mmap_pgoff+0x3af/0x500 [ 32.495747] do_syscall_64+0x3f/0x90 [ 32.496056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.496468] RIP: 0033:0x7fde66ea2d82 [ 32.496759] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 32.498073] RSP: 002b:00007ffebfbd2888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.498635] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde66ea2d82 [ 32.499157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde662dc000 [ 32.499706] RBP: 00007fde662dc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.500245] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf27e00f70 [ 32.500790] R13: 00007ffebfbd28a0 R14: 00007ffebfbd28d0 R15: 00007ffebfbd2c30 [ 32.501338] [ 32.501533] [ 32.501675] Allocated by task 211: [ 32.501958] kasan_save_stack+0x22/0x50 [ 32.502296] kasan_set_track+0x25/0x30 [ 32.502625] __kasan_slab_alloc+0x59/0x70 [ 32.502970] kmem_cache_alloc+0x16b/0x370 [ 32.503357] vm_area_dup+0x20/0x160 [ 32.503668] __split_vma+0x170/0x950 [ 32.503978] split_vma+0xc6/0x110 [ 32.504279] mprotect_fixup+0x8d2/0xb30 [ 32.504616] do_mprotect_pkey+0x87e/0xd40 [ 32.504964] __x64_sys_mprotect+0x78/0xc0 [ 32.505311] do_syscall_64+0x3f/0x90 [ 32.505628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.506055] [ 32.506202] Freed by task 19: [ 32.506457] kasan_save_stack+0x22/0x50 [ 32.506794] kasan_set_track+0x25/0x30 [ 32.507121] kasan_save_free_info+0x2b/0x50 [ 32.507500] __kasan_slab_free+0x10a/0x190 [ 32.507852] kmem_cache_free+0x10d/0x4d0 [ 32.508188] rcu_core+0x8c8/0x2860 [ 32.508478] __do_softirq+0x1b7/0x7d4 [ 32.508790] [ 32.508935] Last potentially related work creation: [ 32.509314] kasan_save_stack+0x22/0x50 [ 32.509651] __kasan_record_aux_stack+0x8e/0xa0 [ 32.510031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.510460] remove_vma+0x139/0x170 [ 32.510757] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.511111] do_vmi_munmap+0x1f1/0x2b0 [ 32.511449] __vm_munmap+0x138/0x3a0 [ 32.511745] __x64_sys_munmap+0x59/0x80 [ 32.512057] do_syscall_64+0x3f/0x90 [ 32.512357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.512761] [ 32.512898] Second to last potentially related work creation: [ 32.513322] kasan_save_stack+0x22/0x50 [ 32.513639] __kasan_record_aux_stack+0x8e/0xa0 [ 32.513996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.514399] remove_vma+0x139/0x170 [ 32.514685] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.515033] do_vmi_munmap+0x1f1/0x2b0 [ 32.515402] mmap_region+0x1f9/0x2660 [ 32.515706] do_mmap+0x854/0xf00 [ 32.515976] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.516327] ksys_mmap_pgoff+0x3af/0x500 [ 32.516653] do_syscall_64+0x3f/0x90 [ 32.516952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.517357] [ 32.517495] The buggy address belongs to the object at ffff88800c4fc488 [ 32.517495] which belongs to the cache vm_area_struct of size 168 [ 32.518413] The buggy address is located 88 bytes inside of [ 32.518413] freed 168-byte region [ffff88800c4fc488, ffff88800c4fc530) [ 32.519290] [ 32.519435] The buggy address belongs to the physical page: [ 32.519822] page:00000000ab6d7871 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4fc [ 32.520502] memcg:ffff888014655b01 [ 32.520774] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.521182] page_type: 0xffffffff() [ 32.521467] raw: 0100000000000200 ffff88800879fc80 ffffea000034dcc0 dead000000000002 [ 32.522039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014655b01 [ 32.522603] page dumped because: kasan: bad access detected [ 32.523017] [ 32.523155] Memory state around the buggy address: [ 32.523569] ffff88800c4fc380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.524104] ffff88800c4fc400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.524638] >ffff88800c4fc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.525173] ^ [ 32.525661] ffff88800c4fc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 32.526233] ffff88800c4fc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.526764] ================================================================== [ 32.527659] Disabling lock debugging due to kernel taint [ 34.771458] BUG: Bad rss-counter state mm:000000008f526d36 type:MM_FILEPAGES val:33 [ 34.772552] BUG: Bad rss-counter state mm:000000008f526d36 type:MM_ANONPAGES val:22 [ 35.407190] BUG: Bad rss-counter state mm:00000000b07fdab0 type:MM_FILEPAGES val:33 [ 35.408063] BUG: Bad rss-counter state mm:00000000b07fdab0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60445' (ECDSA) to the list of known hosts. 2023/06/20 10:05:59 fuzzer started 2023/06/20 10:06:00 dialing manager at localhost:44161 2023/06/20 10:06:00 checking machine... 2023/06/20 10:06:00 checking revisions... [ 36.407621] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:06:00 testing simple program... [ 36.473688] cgroup: Unknown subsys name 'net' [ 36.546920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:05:57 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce09d18 RSP=ffff88806ce09c50 R8 =0000000000000001 R9 =ffffed100d9c1396 R10=ffff88806ce09cb7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7b9f09d900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7b9f067008 CR3=000000000dd88000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea0001b793c0 RCX=0000000000000000 RDX=ffff888017f7b680 RSI=0000000000000008 RDI=ffffea0001b793c0 RBP=ffffea0001b793c0 RSP=ffff88800f567940 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea0001b793c0 R13=00007f7b9f8bf000 R14=ffff8880168f15f0 R15=dffffc0000000000 RIP=ffffffff8180fd20 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7b9f469328 CR3=000000000dd88000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000