syzkaller login: [ 30.510500] BUG: Bad rss-counter state mm:00000000abf9e65c type:MM_FILEPAGES val:33 [ 30.511794] BUG: Bad rss-counter state mm:00000000abf9e65c type:MM_ANONPAGES val:22 [ 30.674050] ================================================================== [ 30.674908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.675796] Read of size 8 at addr ffff8880095f6a50 by task sshd/219 [ 30.676522] [ 30.676740] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.677642] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.678564] Call Trace: [ 30.678870] [ 30.679143] dump_stack_lvl+0x91/0xf0 [ 30.679618] print_report+0xcc/0x620 [ 30.680080] ? __virt_addr_valid+0x102/0x340 [ 30.680609] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.681226] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.681810] kasan_report+0xbe/0xf0 [ 30.682262] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.682849] vma_interval_tree_remove+0xc75/0xec0 [ 30.683421] vma_prepare+0xc54/0x11a0 [ 30.683881] __split_vma+0x5af/0x950 [ 30.684333] ? __pfx___split_vma+0x10/0x10 [ 30.684852] ? find_held_lock+0x2c/0x110 [ 30.685350] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.685914] ? lock_is_held_type+0x9f/0x120 [ 30.686610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.687440] ? mtree_range_walk+0x632/0x900 [ 30.688215] ? mas_walk+0x5c7/0x7c0 [ 30.688898] do_vmi_munmap+0x1f1/0x2b0 [ 30.689412] mmap_region+0x1f9/0x2660 [ 30.689916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.690432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.691158] ? __pfx_lock_acquire+0x10/0x10 [ 30.691697] ? __pfx_mmap_region+0x10/0x10 [ 30.692309] ? security_mmap_addr+0x7d/0xa0 [ 30.692879] ? get_unmapped_area+0x1f5/0x3f0 [ 30.693437] do_mmap+0x854/0xf00 [ 30.693880] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.694386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.694943] ksys_mmap_pgoff+0x3af/0x500 [ 30.695452] do_syscall_64+0x3f/0x90 [ 30.695943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.696593] RIP: 0033:0x7fe613dfed82 [ 30.697072] 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 [ 30.699215] RSP: 002b:00007ffdc8c8bd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.700129] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe613dfed82 [ 30.701013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe613238000 [ 30.701866] RBP: 00007fe613238000 R08: 0000000000000009 R09: 0000000000001000 [ 30.702734] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563be925dec0 [ 30.703593] R13: 00007ffdc8c8bd70 R14: 00007ffdc8c8bda0 R15: 00007ffdc8c8c100 [ 30.704452] [ 30.704758] [ 30.704968] Allocated by task 212: [ 30.705391] kasan_save_stack+0x22/0x50 [ 30.705902] kasan_set_track+0x25/0x30 [ 30.706389] __kasan_slab_alloc+0x59/0x70 [ 30.706910] kmem_cache_alloc+0x16b/0x370 [ 30.707421] vm_area_dup+0x20/0x160 [ 30.707879] __split_vma+0x170/0x950 [ 30.708346] split_vma+0xc6/0x110 [ 30.708796] mprotect_fixup+0x8d2/0xb30 [ 30.709347] do_mprotect_pkey+0x87e/0xd40 [ 30.709893] __x64_sys_mprotect+0x78/0xc0 [ 30.710428] do_syscall_64+0x3f/0x90 [ 30.710937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.711594] [ 30.711815] Freed by task 212: [ 30.712225] kasan_save_stack+0x22/0x50 [ 30.712767] kasan_set_track+0x25/0x30 [ 30.713286] kasan_save_free_info+0x2b/0x50 [ 30.713818] __kasan_slab_free+0x10a/0x190 [ 30.714386] kmem_cache_free+0x10d/0x4d0 [ 30.714929] rcu_core+0x8c8/0x2860 [ 30.715379] __do_softirq+0x1b7/0x7d4 [ 30.715870] [ 30.716088] Last potentially related work creation: [ 30.716699] kasan_save_stack+0x22/0x50 [ 30.717234] __kasan_record_aux_stack+0x8e/0xa0 [ 30.717815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.718481] remove_vma+0x139/0x170 [ 30.718943] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.719508] do_vmi_munmap+0x1f1/0x2b0 [ 30.719999] __vm_munmap+0x138/0x3a0 [ 30.720467] __x64_sys_munmap+0x59/0x80 [ 30.720973] do_syscall_64+0x3f/0x90 [ 30.721451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722090] [ 30.722308] The buggy address belongs to the object at ffff8880095f69f8 [ 30.722308] which belongs to the cache vm_area_struct of size 168 [ 30.723802] The buggy address is located 88 bytes inside of [ 30.723802] freed 168-byte region [ffff8880095f69f8, ffff8880095f6aa0) [ 30.725238] [ 30.725461] The buggy address belongs to the physical page: [ 30.726131] page:000000005276302b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95f6 [ 30.727226] memcg:ffff88800d718301 [ 30.727664] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.728319] page_type: 0xffffffff() [ 30.728786] raw: 0100000000000200 ffff8880087a0c80 ffffea000032b100 dead000000000006 [ 30.729716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d718301 [ 30.730639] page dumped because: kasan: bad access detected [ 30.731315] [ 30.731530] Memory state around the buggy address: [ 30.732120] ffff8880095f6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.732996] ffff8880095f6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.733863] >ffff8880095f6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.734724] ^ [ 30.735432] ffff8880095f6a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.736301] ffff8880095f6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.737195] ================================================================== [ 30.738176] Disabling lock debugging due to kernel taint [ 33.613327] BUG: Bad rss-counter state mm:00000000edbcf645 type:MM_FILEPAGES val:33 [ 33.614288] BUG: Bad rss-counter state mm:00000000edbcf645 type:MM_ANONPAGES val:22 [ 34.173701] BUG: Bad rss-counter state mm:00000000d2a6e9e6 type:MM_FILEPAGES val:33 [ 34.174840] BUG: Bad rss-counter state mm:00000000d2a6e9e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63228' (ECDSA) to the list of known hosts. 2023/06/20 13:19:38 fuzzer started 2023/06/20 13:19:38 dialing manager at localhost:36067 2023/06/20 13:19:38 checking machine... 2023/06/20 13:19:38 checking revisions... [ 34.835683] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:19:38 testing simple program... [ 34.883024] cgroup: Unknown subsys name 'net' [ 34.931304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:19:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8613961e RDX=1ffff1100d9c1357 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff86139622 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=0000000000000005 R15=ffff88806ce09a70 RIP=ffffffff81130b54 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 00007facd441a900 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=00007facd49d1618 CR3=0000000018088000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008df7e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011befd3 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=00007ff025754070 CR3=0000000009a4e000 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=b0defae2b3ea0a940246164c891ba926 XMM02=2c67c8bc2e329bc3000000000011ad30 XMM03=fb795ef6d65770560000000000122270 XMM04=812a1eba3577ce8a00000000000ae988 XMM05=dfcdbad4f1609c3700000000001320e8 XMM06=d15ac35b9dadf4160000000000130f50 XMM07=e042d86d42eb936e00000000001224f0 XMM08=15e0ce8b451f1135000000000011ad90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000