syzkaller login: [ 38.812551] BUG: Bad rss-counter state mm:00000000cb2c6add type:MM_FILEPAGES val:33 [ 38.813769] BUG: Bad rss-counter state mm:00000000cb2c6add type:MM_ANONPAGES val:22 [ 38.849329] ================================================================== [ 38.850049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.850722] Read of size 8 at addr ffff888018345880 by task sshd/219 [ 38.851276] [ 38.851435] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.852049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.852800] Call Trace: [ 38.853037] <TASK> [ 38.853238] dump_stack_lvl+0x91/0xf0 [ 38.853585] print_report+0xcc/0x620 [ 38.853925] ? __virt_addr_valid+0x102/0x340 [ 38.854312] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.854744] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.855199] kasan_report+0xbe/0xf0 [ 38.855538] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.855980] vma_interval_tree_remove+0xc75/0xec0 [ 38.856409] vma_prepare+0xc54/0x11a0 [ 38.856748] __split_vma+0x5af/0x950 [ 38.857102] ? __pfx___split_vma+0x10/0x10 [ 38.857481] ? find_held_lock+0x2c/0x110 [ 38.857854] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.858257] ? lock_is_held_type+0x9f/0x120 [ 38.858641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.859064] ? mtree_range_walk+0x632/0x900 [ 38.859458] ? mas_walk+0x5c7/0x7c0 [ 38.859788] do_vmi_munmap+0x1f1/0x2b0 [ 38.860130] mmap_region+0x1f9/0x2660 [ 38.860475] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.860844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.861341] ? __pfx_lock_acquire+0x10/0x10 [ 38.861714] ? __pfx_mmap_region+0x10/0x10 [ 38.862083] ? security_mmap_addr+0x7d/0xa0 [ 38.862461] ? get_unmapped_area+0x1f5/0x3f0 [ 38.862853] do_mmap+0x854/0xf00 [ 38.863159] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.863507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.863903] ksys_mmap_pgoff+0x3af/0x500 [ 38.864257] do_syscall_64+0x3f/0x90 [ 38.864601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.865066] RIP: 0033:0x7f5b88749d82 [ 38.865387] 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 [ 38.866879] RSP: 002b:00007ffd7f311d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.867535] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b88749d82 [ 38.868151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b87b83000 [ 38.868749] RBP: 00007f5b87b83000 R08: 0000000000000009 R09: 0000000000001000 [ 38.869373] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564afa428d90 [ 38.870008] R13: 00007ffd7f311d30 R14: 00007ffd7f311d60 R15: 00007ffd7f3120c0 [ 38.870616] </TASK> [ 38.870818] [ 38.870970] Allocated by task 212: [ 38.871269] kasan_save_stack+0x22/0x50 [ 38.871621] kasan_set_track+0x25/0x30 [ 38.871967] __kasan_slab_alloc+0x59/0x70 [ 38.872332] kmem_cache_alloc+0x16b/0x370 [ 38.872702] vm_area_dup+0x20/0x160 [ 38.873038] __split_vma+0x170/0x950 [ 38.873364] split_vma+0xc6/0x110 [ 38.873674] mprotect_fixup+0x8d2/0xb30 [ 38.874022] do_mprotect_pkey+0x87e/0xd40 [ 38.874386] __x64_sys_mprotect+0x78/0xc0 [ 38.874753] do_syscall_64+0x3f/0x90 [ 38.875085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.875533] [ 38.875687] Freed by task 212: [ 38.875961] kasan_save_stack+0x22/0x50 [ 38.876311] kasan_set_track+0x25/0x30 [ 38.876662] kasan_save_free_info+0x2b/0x50 [ 38.877037] __kasan_slab_free+0x10a/0x190 [ 38.877407] kmem_cache_free+0x10d/0x4d0 [ 38.877765] rcu_core+0x8c8/0x2860 [ 38.878081] __do_softirq+0x1b7/0x7d4 [ 38.878420] [ 38.878570] Last potentially related work creation: [ 38.878978] kasan_save_stack+0x22/0x50 [ 38.879330] __kasan_record_aux_stack+0x8e/0xa0 [ 38.879736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.880193] remove_vma+0x139/0x170 [ 38.880509] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.880909] do_vmi_munmap+0x1f1/0x2b0 [ 38.881248] __vm_munmap+0x138/0x3a0 [ 38.881597] __x64_sys_munmap+0x59/0x80 [ 38.881949] do_syscall_64+0x3f/0x90 [ 38.882299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.882772] [ 38.882930] The buggy address belongs to the object at ffff888018345828 [ 38.882930] which belongs to the cache vm_area_struct of size 168 [ 38.883999] The buggy address is located 88 bytes inside of [ 38.883999] freed 168-byte region [ffff888018345828, ffff8880183458d0) [ 38.885231] [ 38.885509] The buggy address belongs to the physical page: [ 38.886353] page:000000005e6dc5d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18345 [ 38.887746] memcg:ffff88800e408b01 [ 38.888291] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.889148] page_type: 0xffffffff() [ 38.889711] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.890877] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e408b01 [ 38.891960] page dumped because: kasan: bad access detected [ 38.892741] [ 38.893011] Memory state around the buggy address: [ 38.893700] ffff888018345780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.894727] ffff888018345800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.895803] >ffff888018345880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.896891] ^ [ 38.897408] ffff888018345900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.898495] ffff888018345980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.899548] ================================================================== [ 38.900955] Disabling lock debugging due to kernel taint [ 41.473725] BUG: Bad rss-counter state mm:00000000f1537e4a type:MM_FILEPAGES val:33 [ 41.474730] BUG: Bad rss-counter state mm:00000000f1537e4a type:MM_ANONPAGES val:22 [ 42.004417] BUG: Bad rss-counter state mm:00000000944d0df5 type:MM_FILEPAGES val:33 [ 42.005623] BUG: Bad rss-counter state mm:00000000944d0df5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53749' (ECDSA) to the list of known hosts. 2023/06/21 05:15:54 fuzzer started 2023/06/21 05:15:54 dialing manager at localhost:36067 2023/06/21 05:15:54 checking machine... 2023/06/21 05:15:54 checking revisions... [ 42.745804] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:15:54 testing simple program... [ 42.795565] cgroup: Unknown subsys name 'net' [ 42.848720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:15:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc4a257a88 CR3=0000000005482000 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=00007fdddb30e5100000560c91151790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff7fffffffffff RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002bf4f92 RSP=ffff888015fa7c60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88806cf39518 R13=ffffffff812341ce R14=ffff8880145cbb28 R15=ffff88806cf39500 RIP=ffffffff8180f079 RFL=00000012 [----A--] 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 00007fb53a2ae900 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=00007fb53a863650 CR3=000000000dfbe000 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=2034353a35313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a35313a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000