syzkaller login: [ 30.550746] BUG: Bad rss-counter state mm:00000000f41c089d type:MM_FILEPAGES val:33 [ 30.552282] BUG: Bad rss-counter state mm:00000000f41c089d type:MM_ANONPAGES val:22 [ 30.727886] ================================================================== [ 30.728806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.729748] Read of size 8 at addr ffff888014613798 by task sshd/220 [ 30.730609] [ 30.730826] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.731707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.732699] Call Trace: [ 30.733020] [ 30.733312] dump_stack_lvl+0x91/0xf0 [ 30.733810] print_report+0xcc/0x620 [ 30.734299] ? __virt_addr_valid+0x102/0x340 [ 30.734855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735497] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.736114] kasan_report+0xbe/0xf0 [ 30.736602] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.737235] vma_interval_tree_remove+0xc75/0xec0 [ 30.737847] vma_prepare+0xc54/0x11a0 [ 30.738325] __split_vma+0x5af/0x950 [ 30.738800] ? __pfx___split_vma+0x10/0x10 [ 30.739355] ? find_held_lock+0x2c/0x110 [ 30.739881] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.740452] ? lock_is_held_type+0x9f/0x120 [ 30.741000] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.741603] ? mtree_range_walk+0x632/0x900 [ 30.742179] ? mas_walk+0x5c7/0x7c0 [ 30.742661] do_vmi_munmap+0x1f1/0x2b0 [ 30.743158] mmap_region+0x1f9/0x2660 [ 30.743698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.744228] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.744950] ? __pfx_lock_acquire+0x10/0x10 [ 30.745491] ? __pfx_mmap_region+0x10/0x10 [ 30.746022] ? security_mmap_addr+0x7d/0xa0 [ 30.746557] ? get_unmapped_area+0x1f5/0x3f0 [ 30.747131] do_mmap+0x854/0xf00 [ 30.747583] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.748083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.748666] ksys_mmap_pgoff+0x3af/0x500 [ 30.749187] do_syscall_64+0x3f/0x90 [ 30.749676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750340] RIP: 0033:0x7f7935d52d82 [ 30.750815] 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 [ 30.753011] RSP: 002b:00007ffc42afe388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.753921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7935d52d82 [ 30.754766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f793518c000 [ 30.755628] RBP: 00007f793518c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.756479] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632ef810ec0 [ 30.757327] R13: 00007ffc42afe3a0 R14: 00007ffc42afe3d0 R15: 00007ffc42afe730 [ 30.758185] [ 30.758479] [ 30.758693] Allocated by task 212: [ 30.759138] kasan_save_stack+0x22/0x50 [ 30.759644] kasan_set_track+0x25/0x30 [ 30.760138] __kasan_slab_alloc+0x59/0x70 [ 30.760660] kmem_cache_alloc+0x16b/0x370 [ 30.761179] vm_area_dup+0x20/0x160 [ 30.761639] __split_vma+0x170/0x950 [ 30.762111] split_vma+0xc6/0x110 [ 30.762555] mprotect_fixup+0x8d2/0xb30 [ 30.763063] do_mprotect_pkey+0x87e/0xd40 [ 30.763602] __x64_sys_mprotect+0x78/0xc0 [ 30.764123] do_syscall_64+0x3f/0x90 [ 30.764612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765257] [ 30.765472] Freed by task 212: [ 30.765869] kasan_save_stack+0x22/0x50 [ 30.766378] kasan_set_track+0x25/0x30 [ 30.766874] kasan_save_free_info+0x2b/0x50 [ 30.767425] __kasan_slab_free+0x10a/0x190 [ 30.767957] kmem_cache_free+0x10d/0x4d0 [ 30.768476] rcu_core+0x8c8/0x2860 [ 30.768920] __do_softirq+0x1b7/0x7d4 [ 30.769400] [ 30.769618] Last potentially related work creation: [ 30.770213] kasan_save_stack+0x22/0x50 [ 30.770721] __kasan_record_aux_stack+0x8e/0xa0 [ 30.771307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.771950] remove_vma+0x139/0x170 [ 30.772403] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.772964] do_vmi_munmap+0x1f1/0x2b0 [ 30.773456] __vm_munmap+0x138/0x3a0 [ 30.773927] __x64_sys_munmap+0x59/0x80 [ 30.774424] do_syscall_64+0x3f/0x90 [ 30.774894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775543] [ 30.775764] The buggy address belongs to the object at ffff888014613740 [ 30.775764] which belongs to the cache vm_area_struct of size 168 [ 30.777233] The buggy address is located 88 bytes inside of [ 30.777233] freed 168-byte region [ffff888014613740, ffff8880146137e8) [ 30.778646] [ 30.778865] The buggy address belongs to the physical page: [ 30.779539] page:00000000457a981c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14613 [ 30.780640] memcg:ffff88800d94f001 [ 30.781065] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.781718] page_type: 0xffffffff() [ 30.782167] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.783087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d94f001 [ 30.784011] page dumped because: kasan: bad access detected [ 30.784678] [ 30.784893] Memory state around the buggy address: [ 30.785477] ffff888014613680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.786345] ffff888014613700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.787209] >ffff888014613780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.788065] ^ [ 30.788556] ffff888014613800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.789414] ffff888014613880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.790267] ================================================================== [ 30.791394] Disabling lock debugging due to kernel taint [ 32.683498] BUG: Bad rss-counter state mm:00000000154cbb7d type:MM_FILEPAGES val:33 [ 32.684521] BUG: Bad rss-counter state mm:00000000154cbb7d type:MM_ANONPAGES val:22 [ 33.145487] BUG: Bad rss-counter state mm:000000006ff17215 type:MM_FILEPAGES val:33 [ 33.146480] BUG: Bad rss-counter state mm:000000006ff17215 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5709' (ECDSA) to the list of known hosts. 2023/06/21 01:35:39 fuzzer started 2023/06/21 01:35:39 dialing manager at localhost:36067 2023/06/21 01:35:39 checking machine... 2023/06/21 01:35:39 checking revisions... [ 33.853579] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:35:39 testing simple program... [ 33.900221] cgroup: Unknown subsys name 'net' [ 33.941435] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:35:39 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88806ce35b40 RCX=0000000000000100 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888008f48000 RBP=ffff88800f7ad358 RSP=ffff888017dffbe0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=dffffc0000000000 R13=ffff888008f48000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff811da522 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f57a5700700 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=00007f8ebafd2618 CR3=0000000013a52000 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=35333a3130203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038333a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000002 RCX=ffffffff86138f52 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138f56 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e30 R15=ffff88806cf09a98 RIP=ffffffff81131162 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 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=00007f2d1ca40b50 CR3=000000000d8d2000 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=5eef8db53a5b4f82a8452065f907d41f XMM02=ec2efd57dc4c00df000000000011b560 XMM03=4c09a64df44f2c0e000000000011b630 XMM04=6f4e5876f240c5ff00000000000ae988 XMM05=19e9129bd510f2350000000000131c58 XMM06=21597a5c10b7b0230000000000130ac0 XMM07=e042d86d42eb936e0000000000121e48 XMM08=4c09a64df44f2c0e000000000011b630 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000