syzkaller login: [ 30.700585] BUG: Bad rss-counter state mm:0000000081f83ed5 type:MM_FILEPAGES val:33 [ 30.701614] BUG: Bad rss-counter state mm:0000000081f83ed5 type:MM_ANONPAGES val:22 [ 30.864687] ================================================================== [ 30.865876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.867054] Read of size 8 at addr ffff88800f26cdf0 by task sshd/220 [ 30.868144] [ 30.868443] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.869543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.870818] Call Trace: [ 30.871218] [ 30.871608] dump_stack_lvl+0x91/0xf0 [ 30.872233] print_report+0xcc/0x620 [ 30.872846] ? __virt_addr_valid+0x102/0x340 [ 30.873581] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874777] kasan_report+0xbe/0xf0 [ 30.875176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875680] vma_interval_tree_remove+0xc75/0xec0 [ 30.876179] vma_prepare+0xc54/0x11a0 [ 30.876568] __split_vma+0x5af/0x950 [ 30.876952] ? __pfx___split_vma+0x10/0x10 [ 30.877386] ? find_held_lock+0x2c/0x110 [ 30.877802] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.878268] ? lock_is_held_type+0x9f/0x120 [ 30.878713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.879215] ? mtree_range_walk+0x632/0x900 [ 30.879661] ? mas_walk+0x5c7/0x7c0 [ 30.880054] do_vmi_munmap+0x1f1/0x2b0 [ 30.880456] mmap_region+0x1f9/0x2660 [ 30.880854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.881286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.881884] ? __pfx_lock_acquire+0x10/0x10 [ 30.882319] ? __pfx_mmap_region+0x10/0x10 [ 30.882761] ? security_mmap_addr+0x7d/0xa0 [ 30.883199] ? get_unmapped_area+0x1f5/0x3f0 [ 30.883646] do_mmap+0x854/0xf00 [ 30.884010] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.884409] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.884868] ksys_mmap_pgoff+0x3af/0x500 [ 30.885295] do_syscall_64+0x3f/0x90 [ 30.885689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.886220] RIP: 0033:0x7f90a4206d82 [ 30.886598] 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 [ 30.888430] RSP: 002b:00007ffecba71258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.889200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90a4206d82 [ 30.889902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90a3640000 [ 30.890596] RBP: 00007f90a3640000 R08: 0000000000000009 R09: 0000000000001000 [ 30.891301] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636888c9f70 [ 30.891993] R13: 00007ffecba71270 R14: 00007ffecba712a0 R15: 00007ffecba71600 [ 30.892707] [ 30.892940] [ 30.893127] Allocated by task 213: [ 30.893488] kasan_save_stack+0x22/0x50 [ 30.893900] kasan_set_track+0x25/0x30 [ 30.894303] __kasan_slab_alloc+0x59/0x70 [ 30.894725] kmem_cache_alloc+0x16b/0x370 [ 30.895142] vm_area_dup+0x20/0x160 [ 30.895516] __split_vma+0x170/0x950 [ 30.895903] split_vma+0xc6/0x110 [ 30.896266] mprotect_fixup+0x8d2/0xb30 [ 30.896666] do_mprotect_pkey+0x87e/0xd40 [ 30.897109] __x64_sys_mprotect+0x78/0xc0 [ 30.897537] do_syscall_64+0x3f/0x90 [ 30.897928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898448] [ 30.898619] Freed by task 19: [ 30.898933] kasan_save_stack+0x22/0x50 [ 30.899346] kasan_set_track+0x25/0x30 [ 30.899739] kasan_save_free_info+0x2b/0x50 [ 30.900175] __kasan_slab_free+0x10a/0x190 [ 30.900609] kmem_cache_free+0x10d/0x4d0 [ 30.901042] rcu_core+0x8c8/0x2860 [ 30.901421] __do_softirq+0x1b7/0x7d4 [ 30.901801] [ 30.901975] Last potentially related work creation: [ 30.902448] kasan_save_stack+0x22/0x50 [ 30.902855] __kasan_record_aux_stack+0x8e/0xa0 [ 30.903323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.903832] remove_vma+0x139/0x170 [ 30.904194] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.904641] do_vmi_munmap+0x1f1/0x2b0 [ 30.905041] __vm_munmap+0x138/0x3a0 [ 30.905422] __x64_sys_munmap+0x59/0x80 [ 30.905818] do_syscall_64+0x3f/0x90 [ 30.906199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906716] [ 30.906886] The buggy address belongs to the object at ffff88800f26cd98 [ 30.906886] which belongs to the cache vm_area_struct of size 168 [ 30.908065] The buggy address is located 88 bytes inside of [ 30.908065] freed 168-byte region [ffff88800f26cd98, ffff88800f26ce40) [ 30.909265] [ 30.909439] The buggy address belongs to the physical page: [ 30.909968] page:00000000976e6555 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf26c [ 30.910846] memcg:ffff88800c4c2b01 [ 30.911195] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911727] page_type: 0xffffffff() [ 30.912091] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.912841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4c2b01 [ 30.913579] page dumped because: kasan: bad access detected [ 30.914131] [ 30.914307] Memory state around the buggy address: [ 30.914781] ffff88800f26cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.915472] ffff88800f26cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.916183] >ffff88800f26cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.916878] ^ [ 30.917546] ffff88800f26ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.918241] ffff88800f26ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.918933] ================================================================== [ 30.919682] Disabling lock debugging due to kernel taint [ 32.946993] BUG: Bad rss-counter state mm:00000000db1dc6a6 type:MM_FILEPAGES val:33 [ 32.947821] BUG: Bad rss-counter state mm:00000000db1dc6a6 type:MM_ANONPAGES val:22 [ 33.396013] BUG: Bad rss-counter state mm:00000000b3f11aad type:MM_FILEPAGES val:33 [ 33.396924] BUG: Bad rss-counter state mm:00000000b3f11aad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2627' (ECDSA) to the list of known hosts. 2023/06/21 03:42:15 fuzzer started 2023/06/21 03:42:15 dialing manager at localhost:36067 2023/06/21 03:42:15 checking machine... 2023/06/21 03:42:15 checking revisions... [ 34.125892] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:42:15 testing simple program... [ 34.166916] cgroup: Unknown subsys name 'net' [ 34.207567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:42:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c997a88 RCX=0000000000000001 RDX=1ffff11001932f51 RSI=ffffffff81390b6d RDI=ffff88800c997a94 RBP=0000000000000007 RSP=ffff88800c9979a0 R8 =0000000000000001 R9 =ffff88800c997a00 R10=0000000000038001 R11=0000000000009789 R12=ffff88800c997a88 R13=0000000000000000 R14=ffff8880169ad1c0 R15=ffff888016392900 RIP=ffffffff813ad51f 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 00007f5ec124b900 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=00007fd2c8483a30 CR3=000000000e196000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffc73778c98 CR3=000000000c63e000 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=2034313a32343a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000