syzkaller login: [ 38.974661] BUG: Bad rss-counter state mm:00000000a5c30edd type:MM_FILEPAGES val:33 [ 38.975320] BUG: Bad rss-counter state mm:00000000a5c30edd type:MM_ANONPAGES val:22 [ 39.186913] ================================================================== [ 39.187492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.188082] Read of size 8 at addr ffff88800c571880 by task sshd/222 [ 39.188560] [ 39.188747] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.189285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.189884] Call Trace: [ 39.190094] [ 39.190275] dump_stack_lvl+0x91/0xf0 [ 39.190589] print_report+0xcc/0x620 [ 39.190899] ? __virt_addr_valid+0x102/0x340 [ 39.191250] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.191635] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.192023] kasan_report+0xbe/0xf0 [ 39.192327] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.192792] vma_interval_tree_remove+0xc75/0xec0 [ 39.193360] vma_prepare+0xc54/0x11a0 [ 39.193668] __split_vma+0x5af/0x950 [ 39.193965] ? __pfx___split_vma+0x10/0x10 [ 39.194303] ? find_held_lock+0x2c/0x110 [ 39.194630] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.194986] ? lock_is_held_type+0x9f/0x120 [ 39.195322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.195698] ? mtree_range_walk+0x632/0x900 [ 39.196045] ? mas_walk+0x5c7/0x7c0 [ 39.196349] do_vmi_munmap+0x1f1/0x2b0 [ 39.196668] mmap_region+0x1f9/0x2660 [ 39.196992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.197334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.197786] ? __pfx_lock_acquire+0x10/0x10 [ 39.198132] ? __pfx_mmap_region+0x10/0x10 [ 39.198469] ? security_mmap_addr+0x7d/0xa0 [ 39.198805] ? get_unmapped_area+0x1f5/0x3f0 [ 39.199154] do_mmap+0x854/0xf00 [ 39.199435] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.199744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.200102] ksys_mmap_pgoff+0x3af/0x500 [ 39.200420] do_syscall_64+0x3f/0x90 [ 39.204767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.205183] RIP: 0033:0x7fdb631ced82 [ 39.205472] 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 [ 39.206811] RSP: 002b:00007ffc20aba328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.207380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb631ced82 [ 39.207906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb62608000 [ 39.208444] RBP: 00007fdb62608000 R08: 0000000000000009 R09: 0000000000001000 [ 39.209023] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b88af9bec0 [ 39.209550] R13: 00007ffc20aba340 R14: 00007ffc20aba370 R15: 00007ffc20aba6d0 [ 39.210092] [ 39.210276] [ 39.210411] Allocated by task 213: [ 39.210682] kasan_save_stack+0x22/0x50 [ 39.210994] kasan_set_track+0x25/0x30 [ 39.211309] __kasan_slab_alloc+0x59/0x70 [ 39.211639] kmem_cache_alloc+0x16b/0x370 [ 39.211966] vm_area_dup+0x20/0x160 [ 39.212258] __split_vma+0x170/0x950 [ 39.212553] split_vma+0xc6/0x110 [ 39.212900] mprotect_fixup+0x8d2/0xb30 [ 39.213227] do_mprotect_pkey+0x87e/0xd40 [ 39.213555] __x64_sys_mprotect+0x78/0xc0 [ 39.213886] do_syscall_64+0x3f/0x90 [ 39.214189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.214590] [ 39.214726] Freed by task 213: [ 39.214972] kasan_save_stack+0x22/0x50 [ 39.215300] kasan_set_track+0x25/0x30 [ 39.215614] kasan_save_free_info+0x2b/0x50 [ 39.215953] __kasan_slab_free+0x10a/0x190 [ 39.216286] kmem_cache_free+0x10d/0x4d0 [ 39.216710] rcu_core+0x8c8/0x2860 [ 39.216995] __do_softirq+0x1b7/0x7d4 [ 39.217319] [ 39.217457] Last potentially related work creation: [ 39.217821] kasan_save_stack+0x22/0x50 [ 39.218136] __kasan_record_aux_stack+0x8e/0xa0 [ 39.218490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.218889] remove_vma+0x139/0x170 [ 39.219179] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.219527] do_vmi_munmap+0x1f1/0x2b0 [ 39.219831] __vm_munmap+0x138/0x3a0 [ 39.220123] __x64_sys_munmap+0x59/0x80 [ 39.220432] do_syscall_64+0x3f/0x90 [ 39.220759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.221169] [ 39.221305] The buggy address belongs to the object at ffff88800c571828 [ 39.221305] which belongs to the cache vm_area_struct of size 168 [ 39.222216] The buggy address is located 88 bytes inside of [ 39.222216] freed 168-byte region [ffff88800c571828, ffff88800c5718d0) [ 39.223080] [ 39.223215] The buggy address belongs to the physical page: [ 39.223624] page:000000009b3ab3f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc571 [ 39.224303] memcg:ffff888019e94901 [ 39.224570] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.225022] page_type: 0xffffffff() [ 39.225307] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.225885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e94901 [ 39.226461] page dumped because: kasan: bad access detected [ 39.226873] [ 39.227013] Memory state around the buggy address: [ 39.227378] ffff88800c571780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.227915] ffff88800c571800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.228457] >ffff88800c571880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.229022] ^ [ 39.229282] ffff88800c571900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.229814] ffff88800c571980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.230356] ================================================================== [ 39.231072] Disabling lock debugging due to kernel taint [ 42.128689] BUG: Bad rss-counter state mm:000000004d71c06b type:MM_FILEPAGES val:33 [ 42.129653] BUG: Bad rss-counter state mm:000000004d71c06b type:MM_ANONPAGES val:22 [ 42.849079] BUG: Bad rss-counter state mm:00000000c1ab3c68 type:MM_FILEPAGES val:33 [ 42.849711] BUG: Bad rss-counter state mm:00000000c1ab3c68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41642' (ECDSA) to the list of known hosts. 2023/06/21 10:20:40 fuzzer started 2023/06/21 10:20:41 dialing manager at localhost:36067 2023/06/21 10:20:41 checking machine... 2023/06/21 10:20:41 checking revisions... 2023/06/21 10:20:41 testing simple program... [ 43.793556] kmemleak: Automatic memory scanning thread ended [ 43.842534] cgroup: Unknown subsys name 'net' [ 43.945323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:20:40 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=0000000000000001 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=00007ffcfbf43358 CR3=000000000da64000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=36916f9823b0df640000000000133dd0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=aa6feaeb12d8492300000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=ffff888019aa7818 RCX=0000000000000000 RDX=1ffff11003354f07 RSI=ffffffff84e39740 RDI=0000000000000001 RBP=ffffffff84e39740 RSP=ffff888019aa74c8 R8 =0000000000000005 R9 =0000000000000000 R10=ffff88800e835800 R11=00000000000b6a61 R12=0000000000000001 R13=ffff88800e835800 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff814c0476 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 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=00007fb5ac2eb028 CR3=0000000015bb0000 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=756e696c2d34365f3638782f62696c2f XMM01=00362e6f732e6362696c2f756e672d78 XMM02=ffffffffffffffffffffffffffffffff XMM03=ffffffffffffffffffffffffffffffff XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000