syzkaller login: [ 30.962585] BUG: Bad rss-counter state mm:00000000b99e8f09 type:MM_FILEPAGES val:33 [ 30.964166] BUG: Bad rss-counter state mm:00000000b99e8f09 type:MM_ANONPAGES val:22 [ 31.103531] ================================================================== [ 31.104687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.105769] Read of size 8 at addr ffff88800c56cdf0 by task sshd/219 [ 31.106650] [ 31.106889] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.107845] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.108861] Call Trace: [ 31.109179] [ 31.109459] dump_stack_lvl+0x91/0xf0 [ 31.109949] print_report+0xcc/0x620 [ 31.110431] ? __virt_addr_valid+0x102/0x340 [ 31.110980] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112214] kasan_report+0xbe/0xf0 [ 31.112681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.113310] vma_interval_tree_remove+0xc75/0xec0 [ 31.113913] vma_prepare+0xc54/0x11a0 [ 31.114395] __split_vma+0x5af/0x950 [ 31.114867] ? __pfx___split_vma+0x10/0x10 [ 31.115391] ? find_held_lock+0x2c/0x110 [ 31.115912] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.116507] ? lock_is_held_type+0x9f/0x120 [ 31.117042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.117640] ? mtree_range_walk+0x632/0x900 [ 31.118185] ? mas_walk+0x5c7/0x7c0 [ 31.118658] do_vmi_munmap+0x1f1/0x2b0 [ 31.119149] mmap_region+0x1f9/0x2660 [ 31.119640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.120153] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.120865] ? __pfx_lock_acquire+0x10/0x10 [ 31.121394] ? __pfx_mmap_region+0x10/0x10 [ 31.121921] ? security_mmap_addr+0x7d/0xa0 [ 31.122450] ? get_unmapped_area+0x1f5/0x3f0 [ 31.122990] do_mmap+0x854/0xf00 [ 31.123423] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.123909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.124494] ksys_mmap_pgoff+0x3af/0x500 [ 31.125025] do_syscall_64+0x3f/0x90 [ 31.125527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126202] RIP: 0033:0x7f65afe28d82 [ 31.126679] 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 [ 31.128910] RSP: 002b:00007ffe760357d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.129849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65afe28d82 [ 31.130726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65af262000 [ 31.131607] RBP: 00007f65af262000 R08: 0000000000000009 R09: 0000000000001000 [ 31.132499] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d584284b20 [ 31.133376] R13: 00007ffe760357f0 R14: 00007ffe76035820 R15: 00007ffe76035b80 [ 31.134269] [ 31.134576] [ 31.134803] Allocated by task 212: [ 31.135256] kasan_save_stack+0x22/0x50 [ 31.135784] kasan_set_track+0x25/0x30 [ 31.136314] __kasan_slab_alloc+0x59/0x70 [ 31.136853] kmem_cache_alloc+0x16b/0x370 [ 31.137390] vm_area_dup+0x20/0x160 [ 31.137859] __split_vma+0x170/0x950 [ 31.138346] split_vma+0xc6/0x110 [ 31.138799] mprotect_fixup+0x8d2/0xb30 [ 31.139323] do_mprotect_pkey+0x87e/0xd40 [ 31.139859] __x64_sys_mprotect+0x78/0xc0 [ 31.140411] do_syscall_64+0x3f/0x90 [ 31.140903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141570] [ 31.141795] Freed by task 19: [ 31.142188] kasan_save_stack+0x22/0x50 [ 31.142712] kasan_set_track+0x25/0x30 [ 31.143229] kasan_save_free_info+0x2b/0x50 [ 31.143787] __kasan_slab_free+0x10a/0x190 [ 31.144370] kmem_cache_free+0x10d/0x4d0 [ 31.144898] rcu_core+0x8c8/0x2860 [ 31.145361] __do_softirq+0x1b7/0x7d4 [ 31.145859] [ 31.146083] Last potentially related work creation: [ 31.146693] kasan_save_stack+0x22/0x50 [ 31.147296] __kasan_record_aux_stack+0x8e/0xa0 [ 31.147892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.148572] remove_vma+0x139/0x170 [ 31.149042] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.149618] do_vmi_munmap+0x1f1/0x2b0 [ 31.150125] __vm_munmap+0x138/0x3a0 [ 31.150611] __x64_sys_munmap+0x59/0x80 [ 31.151127] do_syscall_64+0x3f/0x90 [ 31.151621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152303] [ 31.152528] Second to last potentially related work creation: [ 31.153239] kasan_save_stack+0x22/0x50 [ 31.153762] __kasan_record_aux_stack+0x8e/0xa0 [ 31.154367] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.155033] remove_vma+0x139/0x170 [ 31.155501] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.156102] do_vmi_munmap+0x1f1/0x2b0 [ 31.156611] mmap_region+0x1f9/0x2660 [ 31.157110] do_mmap+0x854/0xf00 [ 31.157552] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.158051] ksys_mmap_pgoff+0x3af/0x500 [ 31.158571] do_syscall_64+0x3f/0x90 [ 31.159079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159751] [ 31.159975] The buggy address belongs to the object at ffff88800c56cd98 [ 31.159975] which belongs to the cache vm_area_struct of size 168 [ 31.161535] The buggy address is located 88 bytes inside of [ 31.161535] freed 168-byte region [ffff88800c56cd98, ffff88800c56ce40) [ 31.163013] [ 31.163239] The buggy address belongs to the physical page: [ 31.163939] page:0000000061ed13bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc56c [ 31.165086] memcg:ffff88800fff2a01 [ 31.165525] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.166204] page_type: 0xffffffff() [ 31.166674] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae200 dead000000000006 [ 31.167642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fff2a01 [ 31.168607] page dumped because: kasan: bad access detected [ 31.169305] [ 31.169529] Memory state around the buggy address: [ 31.170138] ffff88800c56cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.171030] ffff88800c56cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.171944] >ffff88800c56cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.172845] ^ [ 31.173687] ffff88800c56ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.174582] ffff88800c56ce80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.175461] ================================================================== [ 31.176595] Disabling lock debugging due to kernel taint [ 33.573495] BUG: Bad rss-counter state mm:00000000a4460e7e type:MM_FILEPAGES val:33 [ 33.574946] BUG: Bad rss-counter state mm:00000000a4460e7e type:MM_ANONPAGES val:22 [ 34.041508] BUG: Bad rss-counter state mm:00000000dbae6338 type:MM_FILEPAGES val:33 [ 34.042470] BUG: Bad rss-counter state mm:00000000dbae6338 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13804' (ECDSA) to the list of known hosts. 2023/06/21 00:19:53 fuzzer started 2023/06/21 00:19:54 dialing manager at localhost:36067 2023/06/21 00:19:54 checking machine... 2023/06/21 00:19:54 checking revisions... [ 34.767031] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:19:54 testing simple program... [ 34.819013] cgroup: Unknown subsys name 'net' [ 34.856691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:19:53 Registers: info registers vcpu 0 RAX=ffffffff8363e064 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110031fce96 RSI=ffffffff8363e064 RDI=ffff888018fe7520 RBP=ffff888018fe74f0 RSP=ffff888018fe7450 R8 =0000000000000001 R9 =ffff888018fe7498 R10=0000000000038001 R11=000000000008a88c R12=ffff888018fe7520 R13=0000000000000000 R14=ffff8880146f51c0 R15=0000000000082cc0 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007fc7a176d900 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=00007ffc89346000 CR3=000000000e304000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fcf418c6240 CR3=0000000019814000 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=2033353a39313a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a39313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000