syzkaller login: [ 31.479880] BUG: Bad rss-counter state mm:00000000e3945e96 type:MM_FILEPAGES val:33 [ 31.481528] BUG: Bad rss-counter state mm:00000000e3945e96 type:MM_ANONPAGES val:22 [ 31.645736] ================================================================== [ 31.646751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.647826] Read of size 8 at addr ffff888018caaed8 by task sshd/221 [ 31.648622] [ 31.648848] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.649775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.650776] Call Trace: [ 31.651109] [ 31.651403] dump_stack_lvl+0x91/0xf0 [ 31.651907] print_report+0xcc/0x620 [ 31.652403] ? __virt_addr_valid+0x102/0x340 [ 31.652976] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.653643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.654293] kasan_report+0xbe/0xf0 [ 31.654793] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.655457] vma_interval_tree_remove+0xc75/0xec0 [ 31.656087] vma_prepare+0xc54/0x11a0 [ 31.656591] __split_vma+0x5af/0x950 [ 31.657085] ? __pfx___split_vma+0x10/0x10 [ 31.657640] ? find_held_lock+0x2c/0x110 [ 31.658183] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.658780] ? lock_is_held_type+0x9f/0x120 [ 31.659341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.659976] ? mtree_range_walk+0x632/0x900 [ 31.660556] ? mas_walk+0x5c7/0x7c0 [ 31.661048] do_vmi_munmap+0x1f1/0x2b0 [ 31.661568] mmap_region+0x1f9/0x2660 [ 31.662071] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.662608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.663364] ? __pfx_lock_acquire+0x10/0x10 [ 31.663921] ? __pfx_mmap_region+0x10/0x10 [ 31.664476] ? security_mmap_addr+0x7d/0xa0 [ 31.665030] ? get_unmapped_area+0x1f5/0x3f0 [ 31.665620] do_mmap+0x854/0xf00 [ 31.666076] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.666599] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.667190] ksys_mmap_pgoff+0x3af/0x500 [ 31.667724] do_syscall_64+0x3f/0x90 [ 31.668220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.668891] RIP: 0033:0x7fe4e0c69d82 [ 31.669361] 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 [ 31.671602] RSP: 002b:00007fffd857c238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.672565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe4e0c69d82 [ 31.673456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe4e00a3000 [ 31.674344] RBP: 00007fe4e00a3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.675222] R10: 0000000000000812 R11: 0000000000000206 R12: 000055618c0a6f70 [ 31.676102] R13: 00007fffd857c250 R14: 00007fffd857c280 R15: 00007fffd857c5e0 [ 31.676996] [ 31.677300] [ 31.677522] Allocated by task 214: [ 31.677991] kasan_save_stack+0x22/0x50 [ 31.678518] kasan_set_track+0x25/0x30 [ 31.679029] __kasan_slab_alloc+0x59/0x70 [ 31.679579] kmem_cache_alloc+0x16b/0x370 [ 31.680122] vm_area_dup+0x20/0x160 [ 31.680596] __split_vma+0x170/0x950 [ 31.681084] split_vma+0xc6/0x110 [ 31.681557] mprotect_fixup+0x8d2/0xb30 [ 31.682074] do_mprotect_pkey+0x87e/0xd40 [ 31.682615] __x64_sys_mprotect+0x78/0xc0 [ 31.683159] do_syscall_64+0x3f/0x90 [ 31.683660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.684333] [ 31.684554] Freed by task 214: [ 31.684963] kasan_save_stack+0x22/0x50 [ 31.685484] kasan_set_track+0x25/0x30 [ 31.686007] kasan_save_free_info+0x2b/0x50 [ 31.686573] __kasan_slab_free+0x10a/0x190 [ 31.687131] kmem_cache_free+0x10d/0x4d0 [ 31.687654] rcu_core+0x8c8/0x2860 [ 31.688116] __do_softirq+0x1b7/0x7d4 [ 31.688609] [ 31.688834] Last potentially related work creation: [ 31.689444] kasan_save_stack+0x22/0x50 [ 31.689975] __kasan_record_aux_stack+0x8e/0xa0 [ 31.690572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.691239] remove_vma+0x139/0x170 [ 31.691711] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.692296] do_vmi_munmap+0x1f1/0x2b0 [ 31.692800] __vm_munmap+0x138/0x3a0 [ 31.693287] __x64_sys_munmap+0x59/0x80 [ 31.693817] do_syscall_64+0x3f/0x90 [ 31.694298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.694968] [ 31.695191] The buggy address belongs to the object at ffff888018caae80 [ 31.695191] which belongs to the cache vm_area_struct of size 168 [ 31.696743] The buggy address is located 88 bytes inside of [ 31.696743] freed 168-byte region [ffff888018caae80, ffff888018caaf28) [ 31.698224] [ 31.698451] The buggy address belongs to the physical page: [ 31.699145] page:00000000f87b6071 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18caa [ 31.700288] memcg:ffff88800ef39601 [ 31.700732] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.701417] page_type: 0xffffffff() [ 31.701902] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.702859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef39601 [ 31.703817] page dumped because: kasan: bad access detected [ 31.704509] [ 31.704734] Memory state around the buggy address: [ 31.705337] ffff888018caad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.706242] ffff888018caae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.707135] >ffff888018caae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.708022] ^ [ 31.708780] ffff888018caaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.709685] ffff888018caaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.710586] ================================================================== [ 31.711608] Disabling lock debugging due to kernel taint [ 33.656467] BUG: Bad rss-counter state mm:00000000d8b8126d type:MM_FILEPAGES val:33 [ 33.657214] BUG: Bad rss-counter state mm:00000000d8b8126d type:MM_ANONPAGES val:22 [ 34.160684] BUG: Bad rss-counter state mm:00000000a2cf4f68 type:MM_FILEPAGES val:33 [ 34.161626] BUG: Bad rss-counter state mm:00000000a2cf4f68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17187' (ECDSA) to the list of known hosts. 2023/06/20 02:57:02 fuzzer started 2023/06/20 02:57:02 dialing manager at localhost:44161 2023/06/20 02:57:02 checking machine... 2023/06/20 02:57:02 checking revisions... [ 34.969417] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:57:02 testing simple program... [ 35.018948] cgroup: Unknown subsys name 'net' [ 35.075061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:57:01 Registers: info registers vcpu 0 RAX=00000000fffffffc RBX=ffff88801584fde0 RCX=0000000000000000 RDX=ffff888015850000 RSI=ffffffff8452ec63 RDI=0000000000000000 RBP=ffff88800d703d40 RSP=ffff88801584fc90 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800d703cd0 R13=ffff88800d703cd0 R14=dffffc0000000000 R15=ffff88800d703cd0 RIP=ffffffff8199e983 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 00007f2979c85900 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=00007fff9ba10bb8 CR3=000000000d93c000 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=00007f3a7b0fb5100000562a6de0f790 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 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11003747ef4 RSP=ffff88801ba3f790 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=0000000000092c40 RIP=ffffffff812d869a 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 00007fa516fe3900 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=00007ffc5a683000 CR3=000000001696e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000