syzkaller login: [ 30.310109] BUG: Bad rss-counter state mm:000000006475b246 type:MM_FILEPAGES val:33 [ 30.311344] BUG: Bad rss-counter state mm:000000006475b246 type:MM_ANONPAGES val:22 [ 30.350770] ================================================================== [ 30.351678] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.352610] Read of size 8 at addr ffff88800c5df228 by task sshd/220 [ 30.353452] [ 30.353667] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.354542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.355564] Call Trace: [ 30.355895] [ 30.356180] dump_stack_lvl+0x91/0xf0 [ 30.356669] print_report+0xcc/0x620 [ 30.357152] ? __virt_addr_valid+0x102/0x340 [ 30.357704] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.358323] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.358988] kasan_report+0xbe/0xf0 [ 30.359466] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360097] vma_interval_tree_remove+0xc75/0xec0 [ 30.360710] vma_prepare+0xc54/0x11a0 [ 30.361191] __split_vma+0x5af/0x950 [ 30.361661] ? __pfx___split_vma+0x10/0x10 [ 30.362188] ? find_held_lock+0x2c/0x110 [ 30.362779] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.363348] ? lock_is_held_type+0x9f/0x120 [ 30.363891] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.364491] ? mtree_range_walk+0x632/0x900 [ 30.365042] ? mas_walk+0x5c7/0x7c0 [ 30.365518] do_vmi_munmap+0x1f1/0x2b0 [ 30.366005] mmap_region+0x1f9/0x2660 [ 30.366509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.367056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.367763] ? __pfx_lock_acquire+0x10/0x10 [ 30.368294] ? __pfx_mmap_region+0x10/0x10 [ 30.368819] ? security_mmap_addr+0x7d/0xa0 [ 30.369344] ? get_unmapped_area+0x1f5/0x3f0 [ 30.369890] do_mmap+0x854/0xf00 [ 30.370328] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.370878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.371437] ksys_mmap_pgoff+0x3af/0x500 [ 30.371946] do_syscall_64+0x3f/0x90 [ 30.372424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.373066] RIP: 0033:0x7f4b3ce22d82 [ 30.373516] 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 [ 30.375692] RSP: 002b:00007ffe73699cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.376596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b3ce22d82 [ 30.377452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b3c25c000 [ 30.378466] RBP: 00007f4b3c25c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.379358] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561864cc2b20 [ 30.380218] R13: 00007ffe73699cd0 R14: 00007ffe73699d00 R15: 00007ffe7369a060 [ 30.381078] [ 30.381371] [ 30.381588] Allocated by task 213: [ 30.382013] kasan_save_stack+0x22/0x50 [ 30.382537] kasan_set_track+0x25/0x30 [ 30.383066] __kasan_slab_alloc+0x59/0x70 [ 30.383594] kmem_cache_alloc+0x16b/0x370 [ 30.384111] vm_area_dup+0x20/0x160 [ 30.384562] __split_vma+0x170/0x950 [ 30.385026] split_vma+0xc6/0x110 [ 30.385459] mprotect_fixup+0x8d2/0xb30 [ 30.385958] do_mprotect_pkey+0x87e/0xd40 [ 30.386498] __x64_sys_mprotect+0x78/0xc0 [ 30.387064] do_syscall_64+0x3f/0x90 [ 30.387546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.388189] [ 30.388411] Freed by task 213: [ 30.388803] kasan_save_stack+0x22/0x50 [ 30.389307] kasan_set_track+0x25/0x30 [ 30.389800] kasan_save_free_info+0x2b/0x50 [ 30.390337] __kasan_slab_free+0x10a/0x190 [ 30.390917] kmem_cache_free+0x10d/0x4d0 [ 30.391436] rcu_core+0x8c8/0x2860 [ 30.391881] __do_softirq+0x1b7/0x7d4 [ 30.392358] [ 30.392577] Last potentially related work creation: [ 30.393163] kasan_save_stack+0x22/0x50 [ 30.393673] __kasan_record_aux_stack+0x8e/0xa0 [ 30.394262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.394974] remove_vma+0x139/0x170 [ 30.395432] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.395998] do_vmi_munmap+0x1f1/0x2b0 [ 30.396485] __vm_munmap+0x138/0x3a0 [ 30.396952] __x64_sys_munmap+0x59/0x80 [ 30.397460] do_syscall_64+0x3f/0x90 [ 30.397934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.398591] [ 30.398846] The buggy address belongs to the object at ffff88800c5df1d0 [ 30.398846] which belongs to the cache vm_area_struct of size 168 [ 30.400320] The buggy address is located 88 bytes inside of [ 30.400320] freed 168-byte region [ffff88800c5df1d0, ffff88800c5df278) [ 30.401725] [ 30.401953] The buggy address belongs to the physical page: [ 30.402629] page:0000000038ef4ed4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5df [ 30.403805] memcg:ffff888016d32e01 [ 30.404308] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.405000] page_type: 0xffffffff() [ 30.405453] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.406389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d32e01 [ 30.407313] page dumped because: kasan: bad access detected [ 30.408011] [ 30.408231] Memory state around the buggy address: [ 30.408827] ffff88800c5df100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.409688] ffff88800c5df180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.410547] >ffff88800c5df200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.411402] ^ [ 30.412005] ffff88800c5df280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.412866] ffff88800c5df300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.413737] ================================================================== [ 30.414943] Disabling lock debugging due to kernel taint [ 32.304938] BUG: Bad rss-counter state mm:00000000df99a210 type:MM_FILEPAGES val:33 [ 32.306129] BUG: Bad rss-counter state mm:00000000df99a210 type:MM_ANONPAGES val:22 [ 32.748491] BUG: Bad rss-counter state mm:0000000029eae266 type:MM_FILEPAGES val:33 [ 32.749419] BUG: Bad rss-counter state mm:0000000029eae266 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8067' (ECDSA) to the list of known hosts. 2023/06/20 15:32:45 fuzzer started 2023/06/20 15:32:45 dialing manager at localhost:36067 2023/06/20 15:32:45 checking machine... 2023/06/20 15:32:45 checking revisions... [ 33.479666] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:32:46 testing simple program... [ 33.529130] cgroup: Unknown subsys name 'net' [ 33.586238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800fe27388 RCX=0000000000000001 RDX=1ffff11001fc4e7c RSI=ffff88800fe27f48 RDI=ffffffff846000aa RBP=ffff88800fe273e0 RSP=ffff88800fe27368 R8 =0000000000000001 R9 =ffff88800fe273c8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800fe27450 R13=0000000000000000 R14=ffff8880167951c0 R15=00000000000128c0 RIP=ffffffff811fc8a2 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faae6c94900 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=00007ffdd1b94000 CR3=000000000976a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fad044d7ed8 CR3=000000000e4d2000 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=2035343a32333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a32333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000