syzkaller login: [ 31.073766] BUG: Bad rss-counter state mm:0000000096681367 type:MM_FILEPAGES val:33 [ 31.074779] BUG: Bad rss-counter state mm:0000000096681367 type:MM_ANONPAGES val:22 [ 31.239356] ================================================================== [ 31.240453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.241614] Read of size 8 at addr ffff88800f0cb140 by task sshd/220 [ 31.242634] [ 31.242858] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.243736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.244727] Call Trace: [ 31.245051] [ 31.245355] dump_stack_lvl+0x91/0xf0 [ 31.245865] print_report+0xcc/0x620 [ 31.246351] ? __virt_addr_valid+0x102/0x340 [ 31.246919] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.248200] kasan_report+0xbe/0xf0 [ 31.248689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249339] vma_interval_tree_remove+0xc75/0xec0 [ 31.249947] vma_prepare+0xc54/0x11a0 [ 31.250434] __split_vma+0x5af/0x950 [ 31.250924] ? __pfx___split_vma+0x10/0x10 [ 31.251461] ? find_held_lock+0x2c/0x110 [ 31.251995] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.252566] ? lock_is_held_type+0x9f/0x120 [ 31.253116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.253752] ? mtree_range_walk+0x632/0x900 [ 31.254314] ? mas_walk+0x5c7/0x7c0 [ 31.254799] do_vmi_munmap+0x1f1/0x2b0 [ 31.255310] mmap_region+0x1f9/0x2660 [ 31.255807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.256337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.257056] ? __pfx_lock_acquire+0x10/0x10 [ 31.257607] ? __pfx_mmap_region+0x10/0x10 [ 31.258156] ? security_mmap_addr+0x7d/0xa0 [ 31.258689] ? get_unmapped_area+0x1f5/0x3f0 [ 31.259262] do_mmap+0x854/0xf00 [ 31.259709] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.260225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.260805] ksys_mmap_pgoff+0x3af/0x500 [ 31.261346] do_syscall_64+0x3f/0x90 [ 31.261851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262527] RIP: 0033:0x7f4be7653d82 [ 31.262994] 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 [ 31.265199] RSP: 002b:00007ffd100a5988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.266130] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4be7653d82 [ 31.267014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4be6a8d000 [ 31.267875] RBP: 00007f4be6a8d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.268744] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c1d280ec0 [ 31.269615] R13: 00007ffd100a59a0 R14: 00007ffd100a59d0 R15: 00007ffd100a5d30 [ 31.270488] [ 31.270787] [ 31.271003] Allocated by task 213: [ 31.271444] kasan_save_stack+0x22/0x50 [ 31.271973] kasan_set_track+0x25/0x30 [ 31.272478] __kasan_slab_alloc+0x59/0x70 [ 31.273029] kmem_cache_alloc+0x16b/0x370 [ 31.273572] vm_area_dup+0x20/0x160 [ 31.274043] __split_vma+0x170/0x950 [ 31.274516] split_vma+0xc6/0x110 [ 31.274973] mprotect_fixup+0x8d2/0xb30 [ 31.275488] do_mprotect_pkey+0x87e/0xd40 [ 31.276033] __x64_sys_mprotect+0x78/0xc0 [ 31.276559] do_syscall_64+0x3f/0x90 [ 31.277045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277716] [ 31.277934] Freed by task 13: [ 31.278327] kasan_save_stack+0x22/0x50 [ 31.278839] kasan_set_track+0x25/0x30 [ 31.279343] kasan_save_free_info+0x2b/0x50 [ 31.279885] __kasan_slab_free+0x10a/0x190 [ 31.280428] kmem_cache_free+0x10d/0x4d0 [ 31.280946] rcu_core+0x8c8/0x2860 [ 31.281420] __do_softirq+0x1b7/0x7d4 [ 31.281897] [ 31.282113] Last potentially related work creation: [ 31.282712] kasan_save_stack+0x22/0x50 [ 31.283227] __kasan_record_aux_stack+0x8e/0xa0 [ 31.283849] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.284509] remove_vma+0x139/0x170 [ 31.284971] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.285551] do_vmi_munmap+0x1f1/0x2b0 [ 31.286045] __vm_munmap+0x138/0x3a0 [ 31.286530] __x64_sys_munmap+0x59/0x80 [ 31.287043] do_syscall_64+0x3f/0x90 [ 31.287533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288193] [ 31.288415] The buggy address belongs to the object at ffff88800f0cb0e8 [ 31.288415] which belongs to the cache vm_area_struct of size 168 [ 31.289929] The buggy address is located 88 bytes inside of [ 31.289929] freed 168-byte region [ffff88800f0cb0e8, ffff88800f0cb190) [ 31.291373] [ 31.291593] The buggy address belongs to the physical page: [ 31.292265] page:00000000afa99518 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0cb [ 31.293386] memcg:ffff88800ec53301 [ 31.293823] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.294480] page_type: 0xffffffff() [ 31.294939] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.295883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec53301 [ 31.296798] page dumped because: kasan: bad access detected [ 31.297492] [ 31.297709] Memory state around the buggy address: [ 31.298300] ffff88800f0cb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.299181] ffff88800f0cb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.300046] >ffff88800f0cb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.300910] ^ [ 31.301570] ffff88800f0cb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.302440] ffff88800f0cb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.303314] ================================================================== [ 31.304283] Disabling lock debugging due to kernel taint [ 33.353137] BUG: Bad rss-counter state mm:0000000050eee301 type:MM_FILEPAGES val:33 [ 33.354050] BUG: Bad rss-counter state mm:0000000050eee301 type:MM_ANONPAGES val:22 [ 33.808913] BUG: Bad rss-counter state mm:00000000b7814b09 type:MM_FILEPAGES val:33 [ 33.809934] BUG: Bad rss-counter state mm:00000000b7814b09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35283' (ECDSA) to the list of known hosts. 2023/06/20 23:27:37 fuzzer started 2023/06/20 23:27:37 dialing manager at localhost:36067 2023/06/20 23:27:37 checking machine... 2023/06/20 23:27:37 checking revisions... [ 34.544528] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:27:38 testing simple program... [ 34.586933] cgroup: Unknown subsys name 'net' [ 34.635471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:27:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028f2f7b RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000283 RDI=ffff88800fe8a450 RBP=ffff88800fe89b40 RSP=ffff888014797b88 R8 =0000000000000000 R9 =ffffed100d9c72a0 R10=ffff88806ce39503 R11=0000000000000001 R12=0000000000000283 R13=ffff88800fe8a450 R14=ffff88800fe89b54 R15=ffff88806ce39500 RIP=ffffffff84535fd5 RFL=00000082 [--S----] 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 00007fe21fba8700 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=00007fd313e7c618 CR3=000000001590c000 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=37323a3332203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383836 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f87408b9660 CR3=000000000d61c000 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=4e3d1831d7b0c6b9c74f4b7b5685f49f XMM02=000000000011d9d0ec2efd57dc4c00df XMM03=000000000012209833dcade4614b41da XMM04=83967cd80880dc3e00000000000ae988 XMM05=2336c836214225700000000000132360 XMM06=4fda316b135da52b0000000000131d58 XMM07=e042d86d42eb936e0000000000122318 XMM08=33dcade4614b41da000000000011da30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000