syzkaller login: [ 30.105106] BUG: Bad rss-counter state mm:000000005447ac98 type:MM_FILEPAGES val:33 [ 30.106311] BUG: Bad rss-counter state mm:000000005447ac98 type:MM_ANONPAGES val:22 [ 30.149039] ================================================================== [ 30.150104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.151070] Read of size 8 at addr ffff88801adaea50 by task sshd/220 [ 30.151881] [ 30.152110] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.152989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.154009] Call Trace: [ 30.154348] [ 30.154639] dump_stack_lvl+0x91/0xf0 [ 30.155157] print_report+0xcc/0x620 [ 30.155660] ? __virt_addr_valid+0x102/0x340 [ 30.156240] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.156874] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.157514] kasan_report+0xbe/0xf0 [ 30.157996] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.158654] vma_interval_tree_remove+0xc75/0xec0 [ 30.159286] vma_prepare+0xc54/0x11a0 [ 30.159782] __split_vma+0x5af/0x950 [ 30.160270] ? __pfx___split_vma+0x10/0x10 [ 30.160800] ? find_held_lock+0x2c/0x110 [ 30.161336] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.161903] ? lock_is_held_type+0x9f/0x120 [ 30.162479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.163115] ? mtree_range_walk+0x632/0x900 [ 30.163710] ? mas_walk+0x5c7/0x7c0 [ 30.164211] do_vmi_munmap+0x1f1/0x2b0 [ 30.164716] mmap_region+0x1f9/0x2660 [ 30.165220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.165738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.166467] ? __pfx_lock_acquire+0x10/0x10 [ 30.167010] ? __pfx_mmap_region+0x10/0x10 [ 30.167576] ? security_mmap_addr+0x7d/0xa0 [ 30.168140] ? get_unmapped_area+0x1f5/0x3f0 [ 30.168700] do_mmap+0x854/0xf00 [ 30.169170] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.169669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.170255] ksys_mmap_pgoff+0x3af/0x500 [ 30.170774] do_syscall_64+0x3f/0x90 [ 30.171276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.171954] RIP: 0033:0x7f26d4d38d82 [ 30.172432] 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 [ 30.174620] RSP: 002b:00007ffcf7c162f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.175561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26d4d38d82 [ 30.176432] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26d4172000 [ 30.177326] RBP: 00007f26d4172000 R08: 0000000000000009 R09: 0000000000001000 [ 30.178211] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559ae496d90 [ 30.179077] R13: 00007ffcf7c16310 R14: 00007ffcf7c16340 R15: 00007ffcf7c166a0 [ 30.179971] [ 30.180291] [ 30.180507] Allocated by task 213: [ 30.180938] kasan_save_stack+0x22/0x50 [ 30.181468] kasan_set_track+0x25/0x30 [ 30.181962] __kasan_slab_alloc+0x59/0x70 [ 30.182515] kmem_cache_alloc+0x16b/0x370 [ 30.183040] vm_area_dup+0x20/0x160 [ 30.183546] __split_vma+0x170/0x950 [ 30.184038] split_vma+0xc6/0x110 [ 30.184495] mprotect_fixup+0x8d2/0xb30 [ 30.184998] do_mprotect_pkey+0x87e/0xd40 [ 30.185537] __x64_sys_mprotect+0x78/0xc0 [ 30.186061] do_syscall_64+0x3f/0x90 [ 30.186550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.187203] [ 30.187437] Freed by task 209: [ 30.187828] kasan_save_stack+0x22/0x50 [ 30.188358] kasan_set_track+0x25/0x30 [ 30.188859] kasan_save_free_info+0x2b/0x50 [ 30.189408] __kasan_slab_free+0x10a/0x190 [ 30.189942] kmem_cache_free+0x10d/0x4d0 [ 30.190460] rcu_core+0x8c8/0x2860 [ 30.190903] __do_softirq+0x1b7/0x7d4 [ 30.191411] [ 30.191629] Last potentially related work creation: [ 30.192228] kasan_save_stack+0x22/0x50 [ 30.192733] __kasan_record_aux_stack+0x8e/0xa0 [ 30.193332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.193979] remove_vma+0x139/0x170 [ 30.194438] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.194994] do_vmi_munmap+0x1f1/0x2b0 [ 30.195509] __vm_munmap+0x138/0x3a0 [ 30.195978] __x64_sys_munmap+0x59/0x80 [ 30.196482] do_syscall_64+0x3f/0x90 [ 30.196952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.197605] [ 30.197822] The buggy address belongs to the object at ffff88801adae9f8 [ 30.197822] which belongs to the cache vm_area_struct of size 168 [ 30.199325] The buggy address is located 88 bytes inside of [ 30.199325] freed 168-byte region [ffff88801adae9f8, ffff88801adaeaa0) [ 30.200743] [ 30.200957] The buggy address belongs to the physical page: [ 30.201626] page:0000000087a1dee7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1adae [ 30.202735] memcg:ffff88800efff301 [ 30.203187] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.203859] page_type: 0xffffffff() [ 30.204328] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.205258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efff301 [ 30.206174] page dumped because: kasan: bad access detected [ 30.206872] [ 30.207113] Memory state around the buggy address: [ 30.207702] ffff88801adae900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.208619] ffff88801adae980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.209526] >ffff88801adaea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.210417] ^ [ 30.211160] ffff88801adaea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.212072] ffff88801adaeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.212972] ================================================================== [ 30.214310] Disabling lock debugging due to kernel taint [ 32.630301] BUG: Bad rss-counter state mm:000000005552c89f type:MM_FILEPAGES val:33 [ 32.631542] BUG: Bad rss-counter state mm:000000005552c89f type:MM_ANONPAGES val:22 [ 33.126143] BUG: Bad rss-counter state mm:0000000014ed773b type:MM_FILEPAGES val:33 [ 33.127288] BUG: Bad rss-counter state mm:0000000014ed773b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25406' (ECDSA) to the list of known hosts. 2023/06/21 02:45:54 fuzzer started 2023/06/21 02:45:54 dialing manager at localhost:36067 2023/06/21 02:45:54 checking machine... 2023/06/21 02:45:54 checking revisions... [ 33.845098] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:45:54 testing simple program... [ 33.896094] cgroup: Unknown subsys name 'net' [ 33.936168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=ffffffff8171ad4c RDX=ffff88801006d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880195622b8 RSP=ffff88800fb6fe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=00007f061da10044 R14=ffff8880195622c8 R15=ffff888015d32e40 RIP=ffffffff814c0864 RFL=00000202 [-------] 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 00007f061cebc900 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=00007f061da10044 CR3=000000000d8a8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=487ce7e7e17ce56ac2e789ab531542e6 XMM05=00000000000000000000000000000000 XMM06=487365636375733d736572205315423d XMM07=672065736f6c635f6e6f69737365733a 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=00007f6311225010 CR3=0000000008ec2000 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=3c2240ebf5bc368f124f72b70b1cf400 XMM02=2c67c8bc2e329bc3000000000011fd88 XMM03=fb795ef6d65770560000000000122ef0 XMM04=3ecc76a91ed0e2d400000000000ae988 XMM05=19e9129bd510f2350000000000132d68 XMM06=50cd1a11713322320000000000131bd0 XMM07=e042d86d42eb936e00000000001238d8 XMM08=622a22602eebaa9f000000000011fde8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000