syzkaller login: [ 39.472168] BUG: Bad rss-counter state mm:00000000b7feb1a1 type:MM_FILEPAGES val:33 [ 39.473688] BUG: Bad rss-counter state mm:00000000b7feb1a1 type:MM_ANONPAGES val:22 [ 39.581542] ================================================================== [ 39.582244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.582998] Read of size 8 at addr ffff88800ef7b140 by task sshd/220 [ 39.583734] [ 39.584025] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.585179] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.586638] Call Trace: [ 39.587064] [ 39.587443] dump_stack_lvl+0x91/0xf0 [ 39.588087] print_report+0xcc/0x620 [ 39.588725] ? __virt_addr_valid+0x102/0x340 [ 39.589388] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.589879] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.590355] kasan_report+0xbe/0xf0 [ 39.590732] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.591214] vma_interval_tree_remove+0xc75/0xec0 [ 39.591680] vma_prepare+0xc54/0x11a0 [ 39.592049] __split_vma+0x5af/0x950 [ 39.592418] ? __pfx___split_vma+0x10/0x10 [ 39.592828] ? find_held_lock+0x2c/0x110 [ 39.593226] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.593662] ? lock_is_held_type+0x9f/0x120 [ 39.594076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.594569] ? mtree_range_walk+0x632/0x900 [ 39.594997] ? mas_walk+0x5c7/0x7c0 [ 39.595364] do_vmi_munmap+0x1f1/0x2b0 [ 39.595741] mmap_region+0x1f9/0x2660 [ 39.596116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.596515] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.597070] ? __pfx_lock_acquire+0x10/0x10 [ 39.597489] ? __pfx_mmap_region+0x10/0x10 [ 39.597899] ? security_mmap_addr+0x7d/0xa0 [ 39.598307] ? get_unmapped_area+0x1f5/0x3f0 [ 39.598749] do_mmap+0x854/0xf00 [ 39.599093] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.599477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.599916] ksys_mmap_pgoff+0x3af/0x500 [ 39.600310] do_syscall_64+0x3f/0x90 [ 39.600681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.601181] RIP: 0033:0x7fecb4f50d82 [ 39.601533] 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 [ 39.603190] RSP: 002b:00007fffbaed9ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.603889] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fecb4f50d82 [ 39.604556] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fecb438a000 [ 39.605219] RBP: 00007fecb438a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.605877] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cbe6f1f70 [ 39.606548] R13: 00007fffbaed9ae0 R14: 00007fffbaed9b10 R15: 00007fffbaed9e70 [ 39.607214] [ 39.607438] [ 39.607602] Allocated by task 213: [ 39.607934] kasan_save_stack+0x22/0x50 [ 39.608328] kasan_set_track+0x25/0x30 [ 39.608712] __kasan_slab_alloc+0x59/0x70 [ 39.609116] kmem_cache_alloc+0x16b/0x370 [ 39.609514] vm_area_dup+0x20/0x160 [ 39.609866] __split_vma+0x170/0x950 [ 39.610228] split_vma+0xc6/0x110 [ 39.610580] mprotect_fixup+0x8d2/0xb30 [ 39.610969] do_mprotect_pkey+0x87e/0xd40 [ 39.611373] __x64_sys_mprotect+0x78/0xc0 [ 39.611776] do_syscall_64+0x3f/0x90 [ 39.612142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.612646] [ 39.612812] Freed by task 213: [ 39.613118] kasan_save_stack+0x22/0x50 [ 39.613508] kasan_set_track+0x25/0x30 [ 39.613886] kasan_save_free_info+0x2b/0x50 [ 39.614297] __kasan_slab_free+0x10a/0x190 [ 39.614716] kmem_cache_free+0x10d/0x4d0 [ 39.615109] rcu_core+0x8c8/0x2860 [ 39.615453] __do_softirq+0x1b7/0x7d4 [ 39.615823] [ 39.615989] Last potentially related work creation: [ 39.616444] kasan_save_stack+0x22/0x50 [ 39.616838] __kasan_record_aux_stack+0x8e/0xa0 [ 39.617280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.617774] remove_vma+0x139/0x170 [ 39.618126] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.618565] do_vmi_munmap+0x1f1/0x2b0 [ 39.618942] __vm_munmap+0x138/0x3a0 [ 39.619302] __x64_sys_munmap+0x59/0x80 [ 39.619689] do_syscall_64+0x3f/0x90 [ 39.620056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.620564] [ 39.620730] The buggy address belongs to the object at ffff88800ef7b0e8 [ 39.620730] which belongs to the cache vm_area_struct of size 168 [ 39.621874] The buggy address is located 88 bytes inside of [ 39.621874] freed 168-byte region [ffff88800ef7b0e8, ffff88800ef7b190) [ 39.622984] [ 39.623149] The buggy address belongs to the physical page: [ 39.623661] page:00000000b0c4005c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef7b [ 39.624503] memcg:ffff88800e962901 [ 39.624829] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.625365] page_type: 0xffffffff() [ 39.625717] raw: 0100000000000200 ffff88800879fc80 ffffea0000393e80 dead000000000003 [ 39.626428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e962901 [ 39.627123] page dumped because: kasan: bad access detected [ 39.627629] [ 39.627795] Memory state around the buggy address: [ 39.628247] ffff88800ef7b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.628899] ffff88800ef7b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.629566] >ffff88800ef7b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.630225] ^ [ 39.630725] ffff88800ef7b180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.631387] ffff88800ef7b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.632042] ================================================================== [ 39.632929] Disabling lock debugging due to kernel taint [ 41.780495] BUG: Bad rss-counter state mm:00000000b900c6ab type:MM_FILEPAGES val:33 [ 41.781478] BUG: Bad rss-counter state mm:00000000b900c6ab type:MM_ANONPAGES val:22 [ 42.200056] BUG: Bad rss-counter state mm:00000000f412b967 type:MM_FILEPAGES val:33 [ 42.201370] BUG: Bad rss-counter state mm:00000000f412b967 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3192' (ECDSA) to the list of known hosts. 2023/06/19 19:34:44 fuzzer started 2023/06/19 19:34:44 dialing manager at localhost:44161 2023/06/19 19:34:44 checking machine... 2023/06/19 19:34:44 checking revisions... [ 42.906805] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:34:44 testing simple program... [ 42.974525] cgroup: Unknown subsys name 'net' [ 43.025812] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:34:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000005a RCX=0000000000000000 RDX=ffff88800e278000 RSI=ffffffff821587dd RDI=0000000000000006 RBP=00007f68100318d0 RSP=ffff8880161d7950 R8 =0000000000000006 R9 =00007f68100318d0 R10=00007f681003192a R11=0000000000000000 R12=ffff88801a8ffb79 R13=00007f681003192a R14=0000000000000000 R15=000000000000005a RIP=ffffffff814c081b 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 00007f681930c700 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=00005561b3a48954 CR3=000000000cb70000 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=2034343a34333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a34333a3931203931 XMM08=3d656e696c646d632022656369767265 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=00007fc085c80670 CR3=0000000013a82000 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=fc9801da73d28baaa442ac402c0b70af XMM02=ec2efd57dc4c00df000000000011e8b8 XMM03=0c773b4d1237fe3f000000000011e988 XMM04=2f166af876d07f1400000000000ae988 XMM05=a0eb71a3e3de22910000000000134538 XMM06=c291bd5c70af25b90000000000133e50 XMM07=e042d86d42eb936e0000000000124a00 XMM08=0c773b4d1237fe3f000000000011e988 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000