syzkaller login: [ 31.143849] BUG: Bad rss-counter state mm:0000000044b2ebe7 type:MM_FILEPAGES val:33 [ 31.145061] BUG: Bad rss-counter state mm:0000000044b2ebe7 type:MM_ANONPAGES val:22 [ 31.182235] ================================================================== [ 31.183172] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.184129] Read of size 8 at addr ffff88800ea30140 by task sshd/220 [ 31.185022] [ 31.185251] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.186120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.187148] Call Trace: [ 31.187472] [ 31.187754] dump_stack_lvl+0x91/0xf0 [ 31.188246] print_report+0xcc/0x620 [ 31.188734] ? __virt_addr_valid+0x102/0x340 [ 31.189292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189927] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.190593] kasan_report+0xbe/0xf0 [ 31.191076] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191702] vma_interval_tree_remove+0xc75/0xec0 [ 31.192300] vma_prepare+0xc54/0x11a0 [ 31.192784] __split_vma+0x5af/0x950 [ 31.193253] ? __pfx___split_vma+0x10/0x10 [ 31.193776] ? find_held_lock+0x2c/0x110 [ 31.194306] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.194871] ? lock_is_held_type+0x9f/0x120 [ 31.195410] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.196023] ? mtree_range_walk+0x632/0x900 [ 31.196584] ? mas_walk+0x5c7/0x7c0 [ 31.197059] do_vmi_munmap+0x1f1/0x2b0 [ 31.197549] mmap_region+0x1f9/0x2660 [ 31.198028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.198553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.199276] ? __pfx_lock_acquire+0x10/0x10 [ 31.199805] ? __pfx_mmap_region+0x10/0x10 [ 31.200331] ? security_mmap_addr+0x7d/0xa0 [ 31.200856] ? get_unmapped_area+0x1f5/0x3f0 [ 31.201405] do_mmap+0x854/0xf00 [ 31.201850] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.202377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.202940] ksys_mmap_pgoff+0x3af/0x500 [ 31.203464] do_syscall_64+0x3f/0x90 [ 31.203955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.204609] RIP: 0033:0x7fb89fc5cd82 [ 31.205065] 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 [ 31.207205] RSP: 002b:00007ffefd4d7558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.208115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb89fc5cd82 [ 31.209008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb89f096000 [ 31.209859] RBP: 00007fb89f096000 R08: 0000000000000009 R09: 0000000000001000 [ 31.210763] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562db8f01f70 [ 31.211624] R13: 00007ffefd4d7570 R14: 00007ffefd4d75a0 R15: 00007ffefd4d7900 [ 31.212490] [ 31.212784] [ 31.212999] Allocated by task 213: [ 31.213426] kasan_save_stack+0x22/0x50 [ 31.213928] kasan_set_track+0x25/0x30 [ 31.214437] __kasan_slab_alloc+0x59/0x70 [ 31.214958] kmem_cache_alloc+0x16b/0x370 [ 31.215473] vm_area_dup+0x20/0x160 [ 31.215928] __split_vma+0x170/0x950 [ 31.216392] split_vma+0xc6/0x110 [ 31.216834] mprotect_fixup+0x8d2/0xb30 [ 31.217331] do_mprotect_pkey+0x87e/0xd40 [ 31.217852] __x64_sys_mprotect+0x78/0xc0 [ 31.218380] do_syscall_64+0x3f/0x90 [ 31.218858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219505] [ 31.219719] Freed by task 203: [ 31.220110] kasan_save_stack+0x22/0x50 [ 31.220614] kasan_set_track+0x25/0x30 [ 31.221109] kasan_save_free_info+0x2b/0x50 [ 31.221646] __kasan_slab_free+0x10a/0x190 [ 31.222226] kmem_cache_free+0x10d/0x4d0 [ 31.222752] rcu_core+0x8c8/0x2860 [ 31.223211] __do_softirq+0x1b7/0x7d4 [ 31.223702] [ 31.223926] Last potentially related work creation: [ 31.224537] kasan_save_stack+0x22/0x50 [ 31.225064] __kasan_record_aux_stack+0x8e/0xa0 [ 31.225666] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.226339] remove_vma+0x139/0x170 [ 31.226811] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.227390] do_vmi_munmap+0x1f1/0x2b0 [ 31.227888] __vm_munmap+0x138/0x3a0 [ 31.228370] __x64_sys_munmap+0x59/0x80 [ 31.228882] do_syscall_64+0x3f/0x90 [ 31.229383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230048] [ 31.230295] Second to last potentially related work creation: [ 31.231010] kasan_save_stack+0x22/0x50 [ 31.231530] __kasan_record_aux_stack+0x8e/0xa0 [ 31.232118] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.232784] remove_vma+0x139/0x170 [ 31.233257] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.233848] do_vmi_munmap+0x1f1/0x2b0 [ 31.234368] mmap_region+0x1f9/0x2660 [ 31.234867] do_mmap+0x854/0xf00 [ 31.235313] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.235822] ksys_mmap_pgoff+0x3af/0x500 [ 31.236335] do_syscall_64+0x3f/0x90 [ 31.236833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237494] [ 31.237719] The buggy address belongs to the object at ffff88800ea300e8 [ 31.237719] which belongs to the cache vm_area_struct of size 168 [ 31.239266] The buggy address is located 88 bytes inside of [ 31.239266] freed 168-byte region [ffff88800ea300e8, ffff88800ea30190) [ 31.240721] [ 31.240947] The buggy address belongs to the physical page: [ 31.241636] page:0000000047f2e173 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea30 [ 31.242790] memcg:ffff88800ea74401 [ 31.243238] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.243963] page_type: 0xffffffff() [ 31.244433] raw: 0100000000000200 ffff8880087a0c80 ffffea0000317840 dead000000000007 [ 31.245397] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea74401 [ 31.246351] page dumped because: kasan: bad access detected [ 31.247036] [ 31.247254] Memory state around the buggy address: [ 31.247856] ffff88800ea30000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.248745] ffff88800ea30080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.249637] >ffff88800ea30100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.250544] ^ [ 31.251203] ffff88800ea30180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.252112] ffff88800ea30200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.253006] ================================================================== [ 31.254220] Disabling lock debugging due to kernel taint [ 33.641907] BUG: Bad rss-counter state mm:00000000c1fc13ee type:MM_FILEPAGES val:33 [ 33.643016] BUG: Bad rss-counter state mm:00000000c1fc13ee type:MM_ANONPAGES val:22 [ 34.050559] BUG: Bad rss-counter state mm:000000000d66da17 type:MM_FILEPAGES val:33 [ 34.051123] BUG: Bad rss-counter state mm:000000000d66da17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9386' (ECDSA) to the list of known hosts. 2023/06/20 15:22:34 fuzzer started 2023/06/20 15:22:34 dialing manager at localhost:36067 2023/06/20 15:22:34 checking machine... 2023/06/20 15:22:34 checking revisions... [ 34.669001] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:22:34 testing simple program... [ 34.711138] cgroup: Unknown subsys name 'net' [ 34.754957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:22:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015ca8000 RCX=0000000000000000 RDX=ffff88800905d1c0 RSI=ffffffff8189db63 RDI=0000000000000001 RBP=ffff88801033fc80 RSP=ffff88801033f950 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=ffff88801033fc88 R14=ffff88801033fc68 R15=ffff88801033fc48 RIP=ffffffff814c089b 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 00007fc7d84cd900 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=00007f7877e7a650 CR3=000000000c688000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d3d5565da5b0dda200000000000ae988 XMM05=0c2711ee1643efbc0000000000133c18 XMM06=19e9129bd510f2350000000000132ad0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=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=000055b6e951c218 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=00007fdcc6f1a510000055948df8c790 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