syzkaller login: [ 31.000159] BUG: Bad rss-counter state mm:00000000da97a677 type:MM_FILEPAGES val:33 [ 31.001831] BUG: Bad rss-counter state mm:00000000da97a677 type:MM_ANONPAGES val:22 [ 31.193303] ================================================================== [ 31.194396] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.195632] Read of size 8 at addr ffff88801697d140 by task sshd/221 [ 31.196521] [ 31.196766] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.197811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.198923] Call Trace: [ 31.199317] <TASK> [ 31.199642] dump_stack_lvl+0x91/0xf0 [ 31.200223] print_report+0xcc/0x620 [ 31.200778] ? __virt_addr_valid+0x102/0x340 [ 31.201444] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202162] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202895] kasan_report+0xbe/0xf0 [ 31.203509] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204268] vma_interval_tree_remove+0xc75/0xec0 [ 31.205027] vma_prepare+0xc54/0x11a0 [ 31.205600] __split_vma+0x5af/0x950 [ 31.206184] ? __pfx___split_vma+0x10/0x10 [ 31.206804] ? find_held_lock+0x2c/0x110 [ 31.207481] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.208167] ? lock_is_held_type+0x9f/0x120 [ 31.208819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.209583] ? mtree_range_walk+0x632/0x900 [ 31.210265] ? mas_walk+0x5c7/0x7c0 [ 31.210831] do_vmi_munmap+0x1f1/0x2b0 [ 31.211452] mmap_region+0x1f9/0x2660 [ 31.212043] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.212660] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.213543] ? __pfx_lock_acquire+0x10/0x10 [ 31.214202] ? __pfx_mmap_region+0x10/0x10 [ 31.214842] ? security_mmap_addr+0x7d/0xa0 [ 31.215514] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216185] do_mmap+0x854/0xf00 [ 31.216715] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218044] ksys_mmap_pgoff+0x3af/0x500 [ 31.218653] do_syscall_64+0x3f/0x90 [ 31.219237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220037] RIP: 0033:0x7f657a26ad82 [ 31.220581] 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 [ 31.223128] RSP: 002b:00007ffce7e4db58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.224233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f657a26ad82 [ 31.225276] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65796a4000 [ 31.226302] RBP: 00007f65796a4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.227346] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622cb24eec0 [ 31.228360] R13: 00007ffce7e4db70 R14: 00007ffce7e4dba0 R15: 00007ffce7e4df00 [ 31.229410] </TASK> [ 31.229756] [ 31.230031] Allocated by task 214: [ 31.230543] kasan_save_stack+0x22/0x50 [ 31.231166] kasan_set_track+0x25/0x30 [ 31.231764] __kasan_slab_alloc+0x59/0x70 [ 31.232412] kmem_cache_alloc+0x16b/0x370 [ 31.233045] vm_area_dup+0x20/0x160 [ 31.233589] __split_vma+0x170/0x950 [ 31.234165] split_vma+0xc6/0x110 [ 31.234691] mprotect_fixup+0x8d2/0xb30 [ 31.235330] do_mprotect_pkey+0x87e/0xd40 [ 31.236001] __x64_sys_mprotect+0x78/0xc0 [ 31.236724] do_syscall_64+0x3f/0x90 [ 31.237333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238115] [ 31.238369] Freed by task 214: [ 31.238832] kasan_save_stack+0x22/0x50 [ 31.239482] kasan_set_track+0x25/0x30 [ 31.240088] kasan_save_free_info+0x2b/0x50 [ 31.240707] __kasan_slab_free+0x10a/0x190 [ 31.241366] kmem_cache_free+0x10d/0x4d0 [ 31.241969] rcu_core+0x8c8/0x2860 [ 31.242492] __do_softirq+0x1b7/0x7d4 [ 31.243076] [ 31.243345] Last potentially related work creation: [ 31.244030] kasan_save_stack+0x22/0x50 [ 31.244620] __kasan_record_aux_stack+0x8e/0xa0 [ 31.245330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.246101] remove_vma+0x139/0x170 [ 31.246630] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.247320] do_vmi_munmap+0x1f1/0x2b0 [ 31.247891] __vm_munmap+0x138/0x3a0 [ 31.248445] __x64_sys_munmap+0x59/0x80 [ 31.249052] do_syscall_64+0x3f/0x90 [ 31.249617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250385] [ 31.250639] The buggy address belongs to the object at ffff88801697d0e8 [ 31.250639] which belongs to the cache vm_area_struct of size 168 [ 31.252400] The buggy address is located 88 bytes inside of [ 31.252400] freed 168-byte region [ffff88801697d0e8, ffff88801697d190) [ 31.254079] [ 31.254330] The buggy address belongs to the physical page: [ 31.255117] page:00000000121e32b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1697d [ 31.256424] memcg:ffff88801617ce01 [ 31.256928] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.257709] page_type: 0xffffffff() [ 31.258256] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.259358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801617ce01 [ 31.260455] page dumped because: kasan: bad access detected [ 31.261262] [ 31.261508] Memory state around the buggy address: [ 31.262192] ffff88801697d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.263198] ffff88801697d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.264207] >ffff88801697d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.265228] ^ [ 31.265964] ffff88801697d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.266961] ffff88801697d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.267983] ================================================================== [ 31.269346] Disabling lock debugging due to kernel taint [ 32.761020] BUG: Bad rss-counter state mm:00000000426ce194 type:MM_FILEPAGES val:33 [ 32.761693] BUG: Bad rss-counter state mm:00000000426ce194 type:MM_ANONPAGES val:22 [ 33.174195] BUG: Bad rss-counter state mm:00000000ed4f65e0 type:MM_FILEPAGES val:33 [ 33.175259] BUG: Bad rss-counter state mm:00000000ed4f65e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54988' (ECDSA) to the list of known hosts. 2023/06/20 20:11:41 fuzzer started 2023/06/20 20:11:42 dialing manager at localhost:36067 2023/06/20 20:11:42 checking machine... 2023/06/20 20:11:42 checking revisions... [ 33.923800] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:11:42 testing simple program... [ 33.979369] cgroup: Unknown subsys name 'net' [ 34.023004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:11:41 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11001d96fca RCX=0000000080000000 RDX=ffff88800dba0000 RSI=ffffffff81733215 RDI=ffff88801615c0c0 RBP=ffff88801615c0c0 RSP=ffff88800ecb7e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=00007f4a2ecceae8 R13=dffffc0000000000 R14=0000000000000001 R15=ffff88801615c0c0 RIP=ffffffff814c0871 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4a2e71a900 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=00007f4a2ecceae8 CR3=000000000d620000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fe9899a7d00 CR3=000000000f58e000 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=2031343a31313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a31313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000