syzkaller login: [ 29.210500] BUG: Bad rss-counter state mm:000000009f6a09b1 type:MM_FILEPAGES val:33 [ 29.211440] BUG: Bad rss-counter state mm:000000009f6a09b1 type:MM_ANONPAGES val:22 [ 29.411962] ================================================================== [ 29.412595] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.413232] Read of size 8 at addr ffff88800fe6adf0 by task sshd/223 [ 29.413741] [ 29.413891] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.414512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.415164] Call Trace: [ 29.415384] [ 29.415580] dump_stack_lvl+0x91/0xf0 [ 29.415916] print_report+0xcc/0x620 [ 29.416294] ? __virt_addr_valid+0x102/0x340 [ 29.416670] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.417089] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.417502] kasan_report+0xbe/0xf0 [ 29.417826] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.418288] vma_interval_tree_remove+0xc75/0xec0 [ 29.418697] vma_prepare+0xc54/0x11a0 [ 29.419027] __split_vma+0x5af/0x950 [ 29.419350] ? __pfx___split_vma+0x10/0x10 [ 29.419710] ? find_held_lock+0x2c/0x110 [ 29.420068] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.420453] ? lock_is_held_type+0x9f/0x120 [ 29.420834] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.421362] ? mtree_range_walk+0x632/0x900 [ 29.421740] ? mas_walk+0x5c7/0x7c0 [ 29.430052] do_vmi_munmap+0x1f1/0x2b0 [ 29.434289] mmap_region+0x1f9/0x2660 [ 29.434626] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.434973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.435459] ? __pfx_lock_acquire+0x10/0x10 [ 29.435834] ? __pfx_mmap_region+0x10/0x10 [ 29.436201] ? security_mmap_addr+0x7d/0xa0 [ 29.436567] ? get_unmapped_area+0x1f5/0x3f0 [ 29.436943] do_mmap+0x854/0xf00 [ 29.437239] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.437554] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.437908] ksys_mmap_pgoff+0x3af/0x500 [ 29.438256] do_syscall_64+0x3f/0x90 [ 29.438583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.439024] RIP: 0033:0x7fd2ba210d82 [ 29.439344] 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 [ 29.440797] RSP: 002b:00007fff79d68c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.441410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2ba210d82 [ 29.442021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2b964a000 [ 29.442594] RBP: 00007fd2b964a000 R08: 0000000000000009 R09: 0000000000001000 [ 29.443172] R10: 0000000000000812 R11: 0000000000000206 R12: 000056550221eec0 [ 29.443754] R13: 00007fff79d68c30 R14: 00007fff79d68c60 R15: 00007fff79d68fc0 [ 29.444347] [ 29.444552] [ 29.444704] Allocated by task 214: [ 29.445008] kasan_save_stack+0x22/0x50 [ 29.445362] kasan_set_track+0x25/0x30 [ 29.445706] __kasan_slab_alloc+0x59/0x70 [ 29.446122] kmem_cache_alloc+0x16b/0x370 [ 29.446470] vm_area_dup+0x20/0x160 [ 29.446778] __split_vma+0x170/0x950 [ 29.447098] split_vma+0xc6/0x110 [ 29.447408] mprotect_fixup+0x8d2/0xb30 [ 29.447748] do_mprotect_pkey+0x87e/0xd40 [ 29.448110] __x64_sys_mprotect+0x78/0xc0 [ 29.448468] do_syscall_64+0x3f/0x90 [ 29.448801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.449250] [ 29.449400] Freed by task 204: [ 29.449673] kasan_save_stack+0x22/0x50 [ 29.450035] kasan_set_track+0x25/0x30 [ 29.450370] kasan_save_free_info+0x2b/0x50 [ 29.450720] __kasan_slab_free+0x10a/0x190 [ 29.451115] kmem_cache_free+0x10d/0x4d0 [ 29.451460] rcu_core+0x8c8/0x2860 [ 29.451762] __do_softirq+0x1b7/0x7d4 [ 29.452088] [ 29.452238] Last potentially related work creation: [ 29.452641] kasan_save_stack+0x22/0x50 [ 29.452982] __kasan_record_aux_stack+0x8e/0xa0 [ 29.453369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.453801] remove_vma+0x139/0x170 [ 29.454144] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.454512] do_vmi_munmap+0x1f1/0x2b0 [ 29.454838] __vm_munmap+0x138/0x3a0 [ 29.455152] __x64_sys_munmap+0x59/0x80 [ 29.455483] do_syscall_64+0x3f/0x90 [ 29.455804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.456235] [ 29.456382] The buggy address belongs to the object at ffff88800fe6ad98 [ 29.456382] which belongs to the cache vm_area_struct of size 168 [ 29.457335] The buggy address is located 88 bytes inside of [ 29.457335] freed 168-byte region [ffff88800fe6ad98, ffff88800fe6ae40) [ 29.458270] [ 29.458416] The buggy address belongs to the physical page: [ 29.458850] page:0000000053579130 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe6a [ 29.459561] memcg:ffff88800c7bfd01 [ 29.459843] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.460264] page_type: 0xffffffff() [ 29.460561] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.461167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7bfd01 [ 29.461757] page dumped because: kasan: bad access detected [ 29.462232] [ 29.462375] Memory state around the buggy address: [ 29.462758] ffff88800fe6ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.463320] ffff88800fe6ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.463880] >ffff88800fe6ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.464446] ^ [ 29.464977] ffff88800fe6ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.465548] ffff88800fe6ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.466227] ================================================================== [ 29.467354] Disabling lock debugging due to kernel taint [ 31.646169] BUG: Bad rss-counter state mm:0000000054108427 type:MM_FILEPAGES val:33 [ 31.646825] BUG: Bad rss-counter state mm:0000000054108427 type:MM_ANONPAGES val:22 [ 32.184284] BUG: Bad rss-counter state mm:000000006da19144 type:MM_FILEPAGES val:33 [ 32.184897] BUG: Bad rss-counter state mm:000000006da19144 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21968' (ECDSA) to the list of known hosts. 2023/06/21 09:56:03 fuzzer started 2023/06/21 09:56:03 dialing manager at localhost:36067 2023/06/21 09:56:03 checking machine... 2023/06/21 09:56:03 checking revisions... [ 32.975013] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:56:03 testing simple program... [ 33.036426] cgroup: Unknown subsys name 'net' [ 33.090141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:56:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888015a251c0 RSI=ffffffff81166d2f RDI=ffff888018034e00 RBP=ffff888018034d98 RSP=ffff88800f51f990 R8 =0000000000000001 R9 =ffffed10020291b2 R10=ffff888010148d93 R11=00000000000b6a61 R12=ffff888016b54910 R13=dffffc0000000000 R14=0000000000000075 R15=0000000000000000 RIP=ffffffff814c0871 RFL=00000282 [--S----] 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 00007fb9c6933900 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=00007fe1ce4c87c0 CR3=000000000da40000 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=cdfd9e330fc7d70f0000000000133870 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=03a19a7cd1dd83d100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007fb9c69336f8 CR3=000000000c60a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000