syzkaller login: [ 23.900133] BUG: Bad rss-counter state mm:00000000f8a9adcf type:MM_FILEPAGES val:33 [ 23.901210] BUG: Bad rss-counter state mm:00000000f8a9adcf type:MM_ANONPAGES val:22 [ 24.072841] ================================================================== [ 24.073771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.074730] Read of size 8 at addr ffff888010220d08 by task sshd/219 [ 24.075512] [ 24.075734] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.076695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.077703] Call Trace: [ 24.078028] [ 24.078312] dump_stack_lvl+0x91/0xf0 [ 24.078818] print_report+0xcc/0x620 [ 24.079302] ? __virt_addr_valid+0x102/0x340 [ 24.079865] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.080488] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.081109] kasan_report+0xbe/0xf0 [ 24.081594] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.082249] vma_interval_tree_remove+0xc75/0xec0 [ 24.082848] vma_prepare+0xc54/0x11a0 [ 24.083342] __split_vma+0x5af/0x950 [ 24.083819] ? __pfx___split_vma+0x10/0x10 [ 24.084348] ? find_held_lock+0x2c/0x110 [ 24.084868] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.085436] ? lock_is_held_type+0x9f/0x120 [ 24.086006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.086624] ? mtree_range_walk+0x632/0x900 [ 24.087175] ? mas_walk+0x5c7/0x7c0 [ 24.087662] do_vmi_munmap+0x1f1/0x2b0 [ 24.088160] mmap_region+0x1f9/0x2660 [ 24.088651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.089163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.089908] ? __pfx_lock_acquire+0x10/0x10 [ 24.090450] ? __pfx_mmap_region+0x10/0x10 [ 24.091001] ? security_mmap_addr+0x7d/0xa0 [ 24.091541] ? get_unmapped_area+0x1f5/0x3f0 [ 24.092096] do_mmap+0x854/0xf00 [ 24.092556] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.093083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.093667] ksys_mmap_pgoff+0x3af/0x500 [ 24.094180] do_syscall_64+0x3f/0x90 [ 24.094670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.095327] RIP: 0033:0x7f6647996d82 [ 24.095793] 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 [ 24.097950] RSP: 002b:00007ffc6a5c8258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.098876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6647996d82 [ 24.099722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6646dd0000 [ 24.100577] RBP: 00007f6646dd0000 R08: 0000000000000009 R09: 0000000000001000 [ 24.101432] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5b791aec0 [ 24.102300] R13: 00007ffc6a5c8270 R14: 00007ffc6a5c82a0 R15: 00007ffc6a5c8600 [ 24.103163] [ 24.103462] [ 24.103681] Allocated by task 212: [ 24.104116] kasan_save_stack+0x22/0x50 [ 24.104630] kasan_set_track+0x25/0x30 [ 24.105132] __kasan_slab_alloc+0x59/0x70 [ 24.105687] kmem_cache_alloc+0x16b/0x370 [ 24.106204] vm_area_dup+0x20/0x160 [ 24.106663] __split_vma+0x170/0x950 [ 24.107140] split_vma+0xc6/0x110 [ 24.107593] mprotect_fixup+0x8d2/0xb30 [ 24.108103] do_mprotect_pkey+0x87e/0xd40 [ 24.108636] __x64_sys_mprotect+0x78/0xc0 [ 24.109168] do_syscall_64+0x3f/0x90 [ 24.109663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.110306] [ 24.110525] Freed by task 19: [ 24.110910] kasan_save_stack+0x22/0x50 [ 24.111422] kasan_set_track+0x25/0x30 [ 24.111914] kasan_save_free_info+0x2b/0x50 [ 24.112462] __kasan_slab_free+0x10a/0x190 [ 24.113012] kmem_cache_free+0x10d/0x4d0 [ 24.113530] rcu_core+0x8c8/0x2860 [ 24.113997] __do_softirq+0x1b7/0x7d4 [ 24.114482] [ 24.114701] Last potentially related work creation: [ 24.115296] kasan_save_stack+0x22/0x50 [ 24.115816] __kasan_record_aux_stack+0x8e/0xa0 [ 24.116403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.117047] remove_vma+0x139/0x170 [ 24.117508] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.118083] do_vmi_munmap+0x1f1/0x2b0 [ 24.118568] __vm_munmap+0x138/0x3a0 [ 24.119046] __x64_sys_munmap+0x59/0x80 [ 24.119547] do_syscall_64+0x3f/0x90 [ 24.120035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.120688] [ 24.120907] The buggy address belongs to the object at ffff888010220cb0 [ 24.120907] which belongs to the cache vm_area_struct of size 168 [ 24.122404] The buggy address is located 88 bytes inside of [ 24.122404] freed 168-byte region [ffff888010220cb0, ffff888010220d58) [ 24.123805] [ 24.124026] The buggy address belongs to the physical page: [ 24.124698] page:000000004dcbf5d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10220 [ 24.125813] memcg:ffff88801b029901 [ 24.126242] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.126905] page_type: 0xffffffff() [ 24.127365] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.128316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b029901 [ 24.129238] page dumped because: kasan: bad access detected [ 24.129920] [ 24.130138] Memory state around the buggy address: [ 24.130736] ffff888010220c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.131613] ffff888010220c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.132490] >ffff888010220d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.133363] ^ [ 24.133831] ffff888010220d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.134702] ffff888010220e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.135572] ================================================================== [ 24.136573] Disabling lock debugging due to kernel taint [ 26.206568] BUG: Bad rss-counter state mm:000000004084ea49 type:MM_FILEPAGES val:33 [ 26.207761] BUG: Bad rss-counter state mm:000000004084ea49 type:MM_ANONPAGES val:22 [ 26.697691] BUG: Bad rss-counter state mm:0000000002150a58 type:MM_FILEPAGES val:33 [ 26.698871] BUG: Bad rss-counter state mm:0000000002150a58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9158' (ECDSA) to the list of known hosts. 2023/06/20 14:44:45 fuzzer started 2023/06/20 14:44:45 dialing manager at localhost:36067 2023/06/20 14:44:45 checking machine... 2023/06/20 14:44:45 checking revisions... [ 27.378534] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:44:45 testing simple program... [ 27.435161] cgroup: Unknown subsys name 'net' [ 27.476816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:44:45 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000010 RDI=ffff88806ce09bd8 RBP=dffffc0000000000 RSP=ffff88806ce09b40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000010 R13=0000000000000000 R14=ffff88806ce09bd0 R15=ffff88800ee3db30 RIP=ffffffff813ad649 RFL=00000283 [--S---C] 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 00007f9d3b868700 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=00007fffe6e87f1c CR3=000000000d61c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035343a3434 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383231 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f31b15a3f30 CR3=000000000d61c000 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=2035343a34343a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a34343a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000