syzkaller login: [ 67.428962] BUG: Bad rss-counter state mm:00000000d83b53ad type:MM_FILEPAGES val:33 [ 67.430364] BUG: Bad rss-counter state mm:00000000d83b53ad type:MM_ANONPAGES val:22 [ 67.595491] ================================================================== [ 67.596415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.597350] Read of size 8 at addr ffff88800c7176b0 by task sshd/220 [ 67.598139] [ 67.598357] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.599508] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.600504] Call Trace: [ 67.600826] [ 67.601207] dump_stack_lvl+0x91/0xf0 [ 67.601798] print_report+0xcc/0x620 [ 67.602367] ? __virt_addr_valid+0x102/0x340 [ 67.603059] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.603776] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.604500] kasan_report+0xbe/0xf0 [ 67.605054] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.605806] vma_interval_tree_remove+0xc75/0xec0 [ 67.606554] vma_prepare+0xc54/0x11a0 [ 67.607180] __split_vma+0x5af/0x950 [ 67.607757] ? __pfx___split_vma+0x10/0x10 [ 67.608396] ? find_held_lock+0x2c/0x110 [ 67.609024] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.609708] ? lock_is_held_type+0x9f/0x120 [ 67.610368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.611154] ? mtree_range_walk+0x632/0x900 [ 67.611700] ? mas_walk+0x5c7/0x7c0 [ 67.612171] do_vmi_munmap+0x1f1/0x2b0 [ 67.612657] mmap_region+0x1f9/0x2660 [ 67.613138] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.613656] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.614372] ? __pfx_lock_acquire+0x10/0x10 [ 67.614930] ? __pfx_mmap_region+0x10/0x10 [ 67.615471] ? security_mmap_addr+0x7d/0xa0 [ 67.616000] ? get_unmapped_area+0x1f5/0x3f0 [ 67.616547] do_mmap+0x854/0xf00 [ 67.616986] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.617481] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.618051] ksys_mmap_pgoff+0x3af/0x500 [ 67.618557] do_syscall_64+0x3f/0x90 [ 67.619074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.619729] RIP: 0033:0x7fc342d0bd82 [ 67.620190] 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 [ 67.622339] RSP: 002b:00007ffc38398b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.623289] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc342d0bd82 [ 67.624127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc342145000 [ 67.624961] RBP: 00007fc342145000 R08: 0000000000000009 R09: 0000000000001000 [ 67.625804] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579d8204f70 [ 67.626660] R13: 00007ffc38398bb0 R14: 00007ffc38398be0 R15: 00007ffc38398f40 [ 67.627526] [ 67.627818] [ 67.628034] Allocated by task 213: [ 67.628462] kasan_save_stack+0x22/0x50 [ 67.628965] kasan_set_track+0x25/0x30 [ 67.629455] __kasan_slab_alloc+0x59/0x70 [ 67.630011] kmem_cache_alloc+0x16b/0x370 [ 67.630531] vm_area_dup+0x20/0x160 [ 67.631036] __split_vma+0x170/0x950 [ 67.631499] split_vma+0xc6/0x110 [ 67.631934] mprotect_fixup+0x8d2/0xb30 [ 67.632439] do_mprotect_pkey+0x87e/0xd40 [ 67.632967] __x64_sys_mprotect+0x78/0xc0 [ 67.633484] do_syscall_64+0x3f/0x90 [ 67.633960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.634598] [ 67.634852] Freed by task 204: [ 67.635244] kasan_save_stack+0x22/0x50 [ 67.635743] kasan_set_track+0x25/0x30 [ 67.636235] kasan_save_free_info+0x2b/0x50 [ 67.636774] __kasan_slab_free+0x10a/0x190 [ 67.637301] kmem_cache_free+0x10d/0x4d0 [ 67.637805] rcu_core+0x8c8/0x2860 [ 67.638263] __do_softirq+0x1b7/0x7d4 [ 67.638773] [ 67.638990] Last potentially related work creation: [ 67.639567] kasan_save_stack+0x22/0x50 [ 67.640074] __kasan_record_aux_stack+0x8e/0xa0 [ 67.640646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.641286] remove_vma+0x139/0x170 [ 67.641737] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.642296] do_vmi_munmap+0x1f1/0x2b0 [ 67.642823] __vm_munmap+0x138/0x3a0 [ 67.643290] __x64_sys_munmap+0x59/0x80 [ 67.643793] do_syscall_64+0x3f/0x90 [ 67.644269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.644910] [ 67.645124] The buggy address belongs to the object at ffff88800c717658 [ 67.645124] which belongs to the cache vm_area_struct of size 168 [ 67.646606] The buggy address is located 88 bytes inside of [ 67.646606] freed 168-byte region [ffff88800c717658, ffff88800c717700) [ 67.648046] [ 67.648260] The buggy address belongs to the physical page: [ 67.648913] page:00000000f5948a08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc717 [ 67.649983] memcg:ffff88801933c501 [ 67.650407] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.651085] page_type: 0xffffffff() [ 67.651532] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.652443] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801933c501 [ 67.653339] page dumped because: kasan: bad access detected [ 67.653992] [ 67.654206] Memory state around the buggy address: [ 67.654808] ffff88800c717580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.655651] ffff88800c717600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 67.656497] >ffff88800c717680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.657345] ^ [ 67.657917] ffff88800c717700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 67.658804] ffff88800c717780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 67.659647] ================================================================== [ 67.660687] Disabling lock debugging due to kernel taint [ 69.606246] BUG: Bad rss-counter state mm:00000000420c88a1 type:MM_FILEPAGES val:33 [ 69.607261] BUG: Bad rss-counter state mm:00000000420c88a1 type:MM_ANONPAGES val:22 [ 70.160394] BUG: Bad rss-counter state mm:0000000022477ce2 type:MM_FILEPAGES val:33 [ 70.161545] BUG: Bad rss-counter state mm:0000000022477ce2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5235' (ECDSA) to the list of known hosts. 2023/06/19 22:10:52 fuzzer started 2023/06/19 22:10:52 dialing manager at localhost:44161 2023/06/19 22:10:52 checking machine... 2023/06/19 22:10:52 checking revisions... [ 70.829010] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:10:52 testing simple program... [ 70.871371] cgroup: Unknown subsys name 'net' [ 70.937900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:10:23 Registers: info registers vcpu 0 RAX=fffffffffba8eab3 RBX=ffffffff85e068b8 RCX=ffffffff818953af RDX=0000000000000000 RSI=ffffffff8614630a RDI=ffffffff85e068a8 RBP=ffffffff85e068a8 RSP=ffff88806ce099e0 R8 =ffffffff8614630a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000023535 R12=ffffffff85e068cc R13=ffffffff85e068a8 R14=ffffffff85e068a8 R15=dffffc0000000000 RIP=ffffffff8112fc93 RFL=00000246 [---Z-P-] 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 00007f14900a2900 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=00007f148f4d2560 CR3=0000000014588000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2e83de0f689d375800000000000ae988 XMM05=c7407a32d3192966000000000013dc70 XMM06=19e9129bd510f235000000000013c798 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015c22018 RBX=0000000000000004 RCX=0000000000000000 RDX=ffff888015d81b40 RSI=ffffffff83664f38 RDI=0000000000000004 RBP=ffff88800f24a640 RSP=ffff88800f9af320 R8 =0000000000000004 R9 =0000000000000020 R10=0000000000000ec0 R11=00000000000b6996 R12=0000000000000008 R13=ffff888015c22018 R14=0000000000000ec0 R15=0000000000000ea8 RIP=ffffffff83664f3c 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 00007fea63bdb900 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=00007fea64192618 CR3=000000000e6ce000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000