syzkaller login: [ 37.023959] BUG: Bad rss-counter state mm:0000000045d8a346 type:MM_FILEPAGES val:33 [ 37.025438] BUG: Bad rss-counter state mm:0000000045d8a346 type:MM_ANONPAGES val:22 [ 37.065879] ================================================================== [ 37.066897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.067904] Read of size 8 at addr ffff888019f9f968 by task sshd/219 [ 37.068886] [ 37.069122] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.070077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.071161] Call Trace: [ 37.071502] [ 37.071804] dump_stack_lvl+0x91/0xf0 [ 37.072333] print_report+0xcc/0x620 [ 37.072880] ? __virt_addr_valid+0x102/0x340 [ 37.073502] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.074177] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.074839] kasan_report+0xbe/0xf0 [ 37.075358] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.076027] vma_interval_tree_remove+0xc75/0xec0 [ 37.076688] vma_prepare+0xc54/0x11a0 [ 37.077201] __split_vma+0x5af/0x950 [ 37.077702] ? __pfx___split_vma+0x10/0x10 [ 37.078272] ? find_held_lock+0x2c/0x110 [ 37.078832] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.079459] ? lock_is_held_type+0x9f/0x120 [ 37.080039] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.080719] ? mtree_range_walk+0x632/0x900 [ 37.081326] ? mas_walk+0x5c7/0x7c0 [ 37.081843] do_vmi_munmap+0x1f1/0x2b0 [ 37.082382] mmap_region+0x1f9/0x2660 [ 37.082902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.083456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.084271] ? __pfx_lock_acquire+0x10/0x10 [ 37.084859] ? __pfx_mmap_region+0x10/0x10 [ 37.085439] ? security_mmap_addr+0x7d/0xa0 [ 37.086023] ? get_unmapped_area+0x1f5/0x3f0 [ 37.086625] do_mmap+0x854/0xf00 [ 37.087111] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.087655] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.088273] ksys_mmap_pgoff+0x3af/0x500 [ 37.088850] do_syscall_64+0x3f/0x90 [ 37.089375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.090104] RIP: 0033:0x7fb20b343d82 [ 37.090612] 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 [ 37.093025] RSP: 002b:00007ffe57583cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.094005] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb20b343d82 [ 37.094920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb20a77d000 [ 37.095825] RBP: 00007fb20a77d000 R08: 0000000000000009 R09: 0000000000001000 [ 37.096748] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bffda97ec0 [ 37.097683] R13: 00007ffe57583d10 R14: 00007ffe57583d40 R15: 00007ffe575840a0 [ 37.098642] [ 37.098953] [ 37.099189] Allocated by task 212: [ 37.099651] kasan_save_stack+0x22/0x50 [ 37.100191] kasan_set_track+0x25/0x30 [ 37.100730] __kasan_slab_alloc+0x59/0x70 [ 37.101307] kmem_cache_alloc+0x16b/0x370 [ 37.101879] vm_area_dup+0x20/0x160 [ 37.102387] __split_vma+0x170/0x950 [ 37.102897] split_vma+0xc6/0x110 [ 37.103384] mprotect_fixup+0x8d2/0xb30 [ 37.103920] do_mprotect_pkey+0x87e/0xd40 [ 37.104509] __x64_sys_mprotect+0x78/0xc0 [ 37.105066] do_syscall_64+0x3f/0x90 [ 37.105577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.106269] [ 37.106498] Freed by task 212: [ 37.106919] kasan_save_stack+0x22/0x50 [ 37.107464] kasan_set_track+0x25/0x30 [ 37.107995] kasan_save_free_info+0x2b/0x50 [ 37.108581] __kasan_slab_free+0x10a/0x190 [ 37.109159] kmem_cache_free+0x10d/0x4d0 [ 37.109733] rcu_core+0x8c8/0x2860 [ 37.110241] __do_softirq+0x1b7/0x7d4 [ 37.110769] [ 37.111001] Last potentially related work creation: [ 37.111662] kasan_save_stack+0x22/0x50 [ 37.112224] __kasan_record_aux_stack+0x8e/0xa0 [ 37.112865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.113553] remove_vma+0x139/0x170 [ 37.114036] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.114638] do_vmi_munmap+0x1f1/0x2b0 [ 37.115162] __vm_munmap+0x138/0x3a0 [ 37.115664] __x64_sys_munmap+0x59/0x80 [ 37.116206] do_syscall_64+0x3f/0x90 [ 37.116725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.117418] [ 37.117650] The buggy address belongs to the object at ffff888019f9f910 [ 37.117650] which belongs to the cache vm_area_struct of size 168 [ 37.119238] The buggy address is located 88 bytes inside of [ 37.119238] freed 168-byte region [ffff888019f9f910, ffff888019f9f9b8) [ 37.120762] [ 37.120996] The buggy address belongs to the physical page: [ 37.121719] page:000000009fb67a77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f9f [ 37.122914] memcg:ffff88800fc26c01 [ 37.123391] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.124110] page_type: 0xffffffff() [ 37.124632] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.125657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc26c01 [ 37.126669] page dumped because: kasan: bad access detected [ 37.127399] [ 37.127637] Memory state around the buggy address: [ 37.128281] ffff888019f9f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.129235] ffff888019f9f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.130188] >ffff888019f9f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.131120] ^ [ 37.131955] ffff888019f9f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.132888] ffff888019f9fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.133799] ================================================================== [ 37.134968] Disabling lock debugging due to kernel taint [ 38.987987] BUG: Bad rss-counter state mm:00000000b31d39e2 type:MM_FILEPAGES val:33 [ 38.989291] BUG: Bad rss-counter state mm:00000000b31d39e2 type:MM_ANONPAGES val:22 [ 39.431123] BUG: Bad rss-counter state mm:0000000084d5c180 type:MM_FILEPAGES val:33 [ 39.432165] BUG: Bad rss-counter state mm:0000000084d5c180 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52571' (ECDSA) to the list of known hosts. 2023/06/20 02:47:59 fuzzer started 2023/06/20 02:47:59 dialing manager at localhost:44161 2023/06/20 02:47:59 checking machine... 2023/06/20 02:47:59 checking revisions... [ 40.169801] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:47:59 testing simple program... [ 40.223863] cgroup: Unknown subsys name 'net' [ 40.312546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:47:52 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=dffffc0000000000 RSI=ffff888015a1f5c0 RDI=1ffff11002b43eaf RBP=ffff888015a1f578 RSP=ffff888015a1f460 R8 =ffffffff86088c1e R9 =ffff888015a1f560 R10=0000000000038001 R11=0000000000003c0d R12=ffff888015a1f580 R13=ffff888015a1f568 R14=ffff888015a1f5c8 R15=ffff888015a1f520 RIP=ffffffff8113106f 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 00007f924f880700 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=00007f6dda313880 CR3=000000000d9b6000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32373534332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323735 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00005649fe040050 CR3=0000000005482000 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=00007fcee42ca5100000557ba2680790 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