syzkaller login: [ 31.058218] BUG: Bad rss-counter state mm:00000000a06ea610 type:MM_FILEPAGES val:33 [ 31.059734] BUG: Bad rss-counter state mm:00000000a06ea610 type:MM_ANONPAGES val:22 [ 31.218838] ================================================================== [ 31.219753] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.220726] Read of size 8 at addr ffff88801a3d1df0 by task sshd/221 [ 31.221491] [ 31.221708] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.222702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.223679] Call Trace: [ 31.224002] [ 31.224300] dump_stack_lvl+0x91/0xf0 [ 31.224808] print_report+0xcc/0x620 [ 31.225299] ? __virt_addr_valid+0x102/0x340 [ 31.225849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227091] kasan_report+0xbe/0xf0 [ 31.227564] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.228216] vma_interval_tree_remove+0xc75/0xec0 [ 31.228832] vma_prepare+0xc54/0x11a0 [ 31.229324] __split_vma+0x5af/0x950 [ 31.229799] ? __pfx___split_vma+0x10/0x10 [ 31.230325] ? find_held_lock+0x2c/0x110 [ 31.230843] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.231417] ? lock_is_held_type+0x9f/0x120 [ 31.231965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.232589] ? mtree_range_walk+0x632/0x900 [ 31.233166] ? mas_walk+0x5c7/0x7c0 [ 31.233647] do_vmi_munmap+0x1f1/0x2b0 [ 31.234146] mmap_region+0x1f9/0x2660 [ 31.234628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.235144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.235861] ? __pfx_lock_acquire+0x10/0x10 [ 31.236410] ? __pfx_mmap_region+0x10/0x10 [ 31.236953] ? security_mmap_addr+0x7d/0xa0 [ 31.237499] ? get_unmapped_area+0x1f5/0x3f0 [ 31.238064] do_mmap+0x854/0xf00 [ 31.238509] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.239006] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.239570] ksys_mmap_pgoff+0x3af/0x500 [ 31.240081] do_syscall_64+0x3f/0x90 [ 31.240595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241253] RIP: 0033:0x7f82edec7d82 [ 31.241711] 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 [ 31.243873] RSP: 002b:00007ffdd3de83b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.244814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82edec7d82 [ 31.245683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82ed301000 [ 31.246544] RBP: 00007f82ed301000 R08: 0000000000000009 R09: 0000000000001000 [ 31.247419] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c2574df60 [ 31.248282] R13: 00007ffdd3de83d0 R14: 00007ffdd3de8400 R15: 00007ffdd3de8760 [ 31.249154] [ 31.249448] [ 31.249666] Allocated by task 214: [ 31.250107] kasan_save_stack+0x22/0x50 [ 31.250612] kasan_set_track+0x25/0x30 [ 31.251099] __kasan_slab_alloc+0x59/0x70 [ 31.251632] kmem_cache_alloc+0x16b/0x370 [ 31.252164] vm_area_dup+0x20/0x160 [ 31.252636] __split_vma+0x170/0x950 [ 31.253110] split_vma+0xc6/0x110 [ 31.253550] mprotect_fixup+0x8d2/0xb30 [ 31.254081] do_mprotect_pkey+0x87e/0xd40 [ 31.254608] __x64_sys_mprotect+0x78/0xc0 [ 31.255140] do_syscall_64+0x3f/0x90 [ 31.255636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256302] [ 31.256514] Freed by task 214: [ 31.256916] kasan_save_stack+0x22/0x50 [ 31.257437] kasan_set_track+0x25/0x30 [ 31.257931] kasan_save_free_info+0x2b/0x50 [ 31.258476] __kasan_slab_free+0x10a/0x190 [ 31.259027] kmem_cache_free+0x10d/0x4d0 [ 31.259541] rcu_core+0x8c8/0x2860 [ 31.259986] __do_softirq+0x1b7/0x7d4 [ 31.260476] [ 31.260691] Last potentially related work creation: [ 31.261290] kasan_save_stack+0x22/0x50 [ 31.261804] __kasan_record_aux_stack+0x8e/0xa0 [ 31.262379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.263030] remove_vma+0x139/0x170 [ 31.263486] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.264045] do_vmi_munmap+0x1f1/0x2b0 [ 31.264553] __vm_munmap+0x138/0x3a0 [ 31.265022] __x64_sys_munmap+0x59/0x80 [ 31.265519] do_syscall_64+0x3f/0x90 [ 31.265993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266642] [ 31.266857] The buggy address belongs to the object at ffff88801a3d1d98 [ 31.266857] which belongs to the cache vm_area_struct of size 168 [ 31.268352] The buggy address is located 88 bytes inside of [ 31.268352] freed 168-byte region [ffff88801a3d1d98, ffff88801a3d1e40) [ 31.269756] [ 31.269971] The buggy address belongs to the physical page: [ 31.270645] page:000000001726a19e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3d1 [ 31.271769] memcg:ffff88801a1d7401 [ 31.272206] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.272861] page_type: 0xffffffff() [ 31.273325] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.274256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1d7401 [ 31.275175] page dumped because: kasan: bad access detected [ 31.275831] [ 31.276050] Memory state around the buggy address: [ 31.276647] ffff88801a3d1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.277506] ffff88801a3d1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.278374] >ffff88801a3d1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.279238] ^ [ 31.280051] ffff88801a3d1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.280919] ffff88801a3d1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.281774] ================================================================== [ 31.282913] Disabling lock debugging due to kernel taint [ 33.546023] BUG: Bad rss-counter state mm:00000000dbceec79 type:MM_FILEPAGES val:33 [ 33.547254] BUG: Bad rss-counter state mm:00000000dbceec79 type:MM_ANONPAGES val:22 [ 34.000613] BUG: Bad rss-counter state mm:000000008b0706a1 type:MM_FILEPAGES val:33 [ 34.001672] BUG: Bad rss-counter state mm:000000008b0706a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8681' (ECDSA) to the list of known hosts. 2023/06/21 06:55:40 fuzzer started 2023/06/21 06:55:40 dialing manager at localhost:36067 2023/06/21 06:55:40 checking machine... 2023/06/21 06:55:40 checking revisions... [ 34.746282] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:55:40 testing simple program... [ 34.807605] cgroup: Unknown subsys name 'net' [ 34.849572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:55:40 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=000055970636df80 RCX=0000000000000001 RDX=0000000000000dc0 RSI=000000000000000a RDI=000055970637c100 RBP=00007ffe304ddd60 RSP=00007ffe304ddcf8 R8 =000055970637c0ff R9 =00007f2c35c63be0 R10=000000000000006f R11=0000000000000246 R12=00007f2c356b1900 R13=00007ffe304ddd68 R14=0000000000000e41 R15=0000000000000000 RIP=00007f2c35c00bd4 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2c356b1900 00000000 00000000 GS =0000 0000000000000000 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=00007f2c35c66650 CR3=000000000f7f2000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000ff0000000000 XMM02=0000000000000000000000000000ffff XMM03=622073656e696c282073656e696c2074 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=4c20726f66206465696669646f4d0000 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=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=00007ffd03afb808 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=00007f92467b2510000055c41ecb2790 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