syzkaller login: [ 30.080432] BUG: Bad rss-counter state mm:000000001c974497 type:MM_FILEPAGES val:33 [ 30.081701] BUG: Bad rss-counter state mm:000000001c974497 type:MM_ANONPAGES val:22 [ 30.227023] ================================================================== [ 30.228055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.229135] Read of size 8 at addr ffff88800c63d968 by task sshd/221 [ 30.230188] [ 30.230440] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.231429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.232510] Call Trace: [ 30.232811] [ 30.233081] dump_stack_lvl+0x91/0xf0 [ 30.233545] print_report+0xcc/0x620 [ 30.234008] ? __virt_addr_valid+0x102/0x340 [ 30.234528] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.235109] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.235688] kasan_report+0xbe/0xf0 [ 30.236162] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.236949] vma_interval_tree_remove+0xc75/0xec0 [ 30.237710] vma_prepare+0xc54/0x11a0 [ 30.238306] __split_vma+0x5af/0x950 [ 30.238893] ? __pfx___split_vma+0x10/0x10 [ 30.239552] ? find_held_lock+0x2c/0x110 [ 30.240194] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.240913] ? lock_is_held_type+0x9f/0x120 [ 30.241589] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.242340] ? mtree_range_walk+0x632/0x900 [ 30.243028] ? mas_walk+0x5c7/0x7c0 [ 30.243617] do_vmi_munmap+0x1f1/0x2b0 [ 30.244225] mmap_region+0x1f9/0x2660 [ 30.244849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.245483] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.246368] ? __pfx_lock_acquire+0x10/0x10 [ 30.247023] ? __pfx_mmap_region+0x10/0x10 [ 30.247688] ? security_mmap_addr+0x7d/0xa0 [ 30.248348] ? get_unmapped_area+0x1f5/0x3f0 [ 30.249049] do_mmap+0x854/0xf00 [ 30.249595] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.250208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.250913] ksys_mmap_pgoff+0x3af/0x500 [ 30.251548] do_syscall_64+0x3f/0x90 [ 30.252143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.252979] RIP: 0033:0x7fa4433cdd82 [ 30.253596] 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 [ 30.256559] RSP: 002b:00007ffd04979b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.257788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4433cdd82 [ 30.258950] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa442807000 [ 30.260115] RBP: 00007fa442807000 R08: 0000000000000009 R09: 0000000000001000 [ 30.261280] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557bc01d9ec0 [ 30.262467] R13: 00007ffd04979b70 R14: 00007ffd04979ba0 R15: 00007ffd04979f00 [ 30.263511] [ 30.263825] [ 30.264056] Allocated by task 214: [ 30.264530] kasan_save_stack+0x22/0x50 [ 30.265068] kasan_set_track+0x25/0x30 [ 30.265590] __kasan_slab_alloc+0x59/0x70 [ 30.266143] kmem_cache_alloc+0x16b/0x370 [ 30.266686] vm_area_dup+0x20/0x160 [ 30.267165] __split_vma+0x170/0x950 [ 30.267653] split_vma+0xc6/0x110 [ 30.268119] mprotect_fixup+0x8d2/0xb30 [ 30.268659] do_mprotect_pkey+0x87e/0xd40 [ 30.269211] __x64_sys_mprotect+0x78/0xc0 [ 30.269765] do_syscall_64+0x3f/0x90 [ 30.270269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.271043] [ 30.271274] Freed by task 214: [ 30.271688] kasan_save_stack+0x22/0x50 [ 30.272219] kasan_set_track+0x25/0x30 [ 30.272772] kasan_save_free_info+0x2b/0x50 [ 30.273336] __kasan_slab_free+0x10a/0x190 [ 30.273895] kmem_cache_free+0x10d/0x4d0 [ 30.274435] rcu_core+0x8c8/0x2860 [ 30.274907] __do_softirq+0x1b7/0x7d4 [ 30.275412] [ 30.275642] Last potentially related work creation: [ 30.276259] kasan_save_stack+0x22/0x50 [ 30.276800] __kasan_record_aux_stack+0x8e/0xa0 [ 30.277406] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.278081] remove_vma+0x139/0x170 [ 30.278558] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.279145] do_vmi_munmap+0x1f1/0x2b0 [ 30.279655] __vm_munmap+0x138/0x3a0 [ 30.280146] __x64_sys_munmap+0x59/0x80 [ 30.280676] do_syscall_64+0x3f/0x90 [ 30.281182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.281865] [ 30.282095] The buggy address belongs to the object at ffff88800c63d910 [ 30.282095] which belongs to the cache vm_area_struct of size 168 [ 30.283635] The buggy address is located 88 bytes inside of [ 30.283635] freed 168-byte region [ffff88800c63d910, ffff88800c63d9b8) [ 30.285134] [ 30.285366] The buggy address belongs to the physical page: [ 30.286061] page:0000000016ea63bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc63d [ 30.287195] memcg:ffff88800fcd0901 [ 30.287642] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.288317] page_type: 0xffffffff() [ 30.288802] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.289773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcd0901 [ 30.290730] page dumped because: kasan: bad access detected [ 30.291424] [ 30.291652] Memory state around the buggy address: [ 30.292262] ffff88800c63d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.293167] ffff88800c63d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.294065] >ffff88800c63d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.294961] ^ [ 30.295781] ffff88800c63d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.296688] ffff88800c63da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.297588] ================================================================== [ 30.298557] Disabling lock debugging due to kernel taint [ 32.598783] BUG: Bad rss-counter state mm:00000000fe4f545b type:MM_FILEPAGES val:33 [ 32.600088] BUG: Bad rss-counter state mm:00000000fe4f545b type:MM_ANONPAGES val:22 [ 33.126219] BUG: Bad rss-counter state mm:00000000810937a8 type:MM_FILEPAGES val:33 [ 33.127383] BUG: Bad rss-counter state mm:00000000810937a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57382' (ECDSA) to the list of known hosts. 2023/06/20 13:49:41 fuzzer started 2023/06/20 13:49:41 dialing manager at localhost:36067 2023/06/20 13:49:41 checking machine... 2023/06/20 13:49:41 checking revisions... [ 33.747962] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:49:41 testing simple program... [ 33.814408] cgroup: Unknown subsys name 'net' [ 33.870492] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:49:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800893e1c0 RCX=0000000000000000 RDX=1ffffffff09b48a6 RSI=ffffffff83635ac5 RDI=ffffffff84da4530 RBP=ffff88800fe0fe60 RSP=ffff88800fe0fb20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff84da44a0 R13=0000000000000040 R14=ffff88800fe0fe88 R15=ffff88800fe0fea4 RIP=ffffffff83635b05 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 00007ff2411a3700 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=00007fe8f76890b0 CR3=000000001971a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732031343a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363238 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=00007ff6b781ba00 CR3=000000000d0d2000 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=ffdef94a893b70967943e6b2d1a1d456 XMM02=0000000000119c00eff9b2d0a8fce9cb XMM03=0000000000119cd02c67c8bc2e329bc3 XMM04=097dd4d4dc0fbb5400000000000ae988 XMM05=b5fd4911bc29f5f900000000001321b0 XMM06=c291bd5c70af25b90000000000131250 XMM07=e042d86d42eb936e0000000000121760 XMM08=a6cb0e8d4a9f89f10000000000119cd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000