syzkaller login: [ 33.006215] BUG: Bad rss-counter state mm:000000007c857079 type:MM_FILEPAGES val:33 [ 33.007225] BUG: Bad rss-counter state mm:000000007c857079 type:MM_ANONPAGES val:22 [ 33.165969] ================================================================== [ 33.166866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.167803] Read of size 8 at addr ffff88800e0b6d08 by task sshd/221 [ 33.168585] [ 33.168808] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.169810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.170789] Call Trace: [ 33.171111] [ 33.171393] dump_stack_lvl+0x91/0xf0 [ 33.171916] print_report+0xcc/0x620 [ 33.172408] ? __virt_addr_valid+0x102/0x340 [ 33.172970] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.173590] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.174222] kasan_report+0xbe/0xf0 [ 33.174696] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.175318] vma_interval_tree_remove+0xc75/0xec0 [ 33.175937] vma_prepare+0xc54/0x11a0 [ 33.176429] __split_vma+0x5af/0x950 [ 33.176907] ? __pfx___split_vma+0x10/0x10 [ 33.177435] ? find_held_lock+0x2c/0x110 [ 33.177958] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.178524] ? lock_is_held_type+0x9f/0x120 [ 33.179068] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.179668] ? mtree_range_walk+0x632/0x900 [ 33.180225] ? mas_walk+0x5c7/0x7c0 [ 33.180755] do_vmi_munmap+0x1f1/0x2b0 [ 33.181269] mmap_region+0x1f9/0x2660 [ 33.181756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.182278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.182994] ? __pfx_lock_acquire+0x10/0x10 [ 33.183530] ? __pfx_mmap_region+0x10/0x10 [ 33.184062] ? security_mmap_addr+0x7d/0xa0 [ 33.184600] ? get_unmapped_area+0x1f5/0x3f0 [ 33.185147] do_mmap+0x854/0xf00 [ 33.185594] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.186090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.186656] ksys_mmap_pgoff+0x3af/0x500 [ 33.187162] do_syscall_64+0x3f/0x90 [ 33.187638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.188313] RIP: 0033:0x7f837b295d82 [ 33.188783] 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 [ 33.190924] RSP: 002b:00007fffed1eb028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.191832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f837b295d82 [ 33.192687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f837a6cf000 [ 33.193530] RBP: 00007f837a6cf000 R08: 0000000000000009 R09: 0000000000001000 [ 33.194377] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575bc67eec0 [ 33.195223] R13: 00007fffed1eb040 R14: 00007fffed1eb070 R15: 00007fffed1eb3d0 [ 33.196102] [ 33.196412] [ 33.196635] Allocated by task 214: [ 33.197070] kasan_save_stack+0x22/0x50 [ 33.197591] kasan_set_track+0x25/0x30 [ 33.198094] __kasan_slab_alloc+0x59/0x70 [ 33.198633] kmem_cache_alloc+0x16b/0x370 [ 33.199145] vm_area_dup+0x20/0x160 [ 33.199599] __split_vma+0x170/0x950 [ 33.200067] split_vma+0xc6/0x110 [ 33.200524] mprotect_fixup+0x8d2/0xb30 [ 33.201046] do_mprotect_pkey+0x87e/0xd40 [ 33.201579] __x64_sys_mprotect+0x78/0xc0 [ 33.202111] do_syscall_64+0x3f/0x90 [ 33.202586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.203242] [ 33.203453] Freed by task 214: [ 33.203852] kasan_save_stack+0x22/0x50 [ 33.204369] kasan_set_track+0x25/0x30 [ 33.204863] kasan_save_free_info+0x2b/0x50 [ 33.205398] __kasan_slab_free+0x10a/0x190 [ 33.205958] kmem_cache_free+0x10d/0x4d0 [ 33.206485] rcu_core+0x8c8/0x2860 [ 33.206944] __do_softirq+0x1b7/0x7d4 [ 33.207421] [ 33.207659] Last potentially related work creation: [ 33.208241] kasan_save_stack+0x22/0x50 [ 33.208760] __kasan_record_aux_stack+0x8e/0xa0 [ 33.209359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.210008] remove_vma+0x139/0x170 [ 33.210457] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.211099] do_vmi_munmap+0x1f1/0x2b0 [ 33.211589] __vm_munmap+0x138/0x3a0 [ 33.212055] __x64_sys_munmap+0x59/0x80 [ 33.212574] do_syscall_64+0x3f/0x90 [ 33.213048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.213683] [ 33.213898] The buggy address belongs to the object at ffff88800e0b6cb0 [ 33.213898] which belongs to the cache vm_area_struct of size 168 [ 33.215358] The buggy address is located 88 bytes inside of [ 33.215358] freed 168-byte region [ffff88800e0b6cb0, ffff88800e0b6d58) [ 33.216765] [ 33.216984] The buggy address belongs to the physical page: [ 33.217650] page:00000000cfabd0ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b6 [ 33.218751] memcg:ffff88801836fa01 [ 33.219183] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.219836] page_type: 0xffffffff() [ 33.220315] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.221238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801836fa01 [ 33.222147] page dumped because: kasan: bad access detected [ 33.222812] [ 33.223033] Memory state around the buggy address: [ 33.223624] ffff88800e0b6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.224486] ffff88800e0b6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.225343] >ffff88800e0b6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.226191] ^ [ 33.226631] ffff88800e0b6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.227484] ffff88800e0b6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.228356] ================================================================== [ 33.229264] Disabling lock debugging due to kernel taint [ 35.393562] BUG: Bad rss-counter state mm:00000000bc0758da type:MM_FILEPAGES val:33 [ 35.394580] BUG: Bad rss-counter state mm:00000000bc0758da type:MM_ANONPAGES val:22 [ 35.949552] BUG: Bad rss-counter state mm:0000000027b49146 type:MM_FILEPAGES val:33 [ 35.950726] BUG: Bad rss-counter state mm:0000000027b49146 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41769' (ECDSA) to the list of known hosts. 2023/06/20 07:18:53 fuzzer started 2023/06/20 07:18:53 dialing manager at localhost:44161 2023/06/20 07:18:53 checking machine... 2023/06/20 07:18:53 checking revisions... [ 36.566758] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:18:53 testing simple program... [ 36.616836] cgroup: Unknown subsys name 'net' [ 36.650859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:18:50 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85dfcb88 RCX=ffffffff8180cd08 RDX=0000000000000000 RSI=ffffffff86137736 RDI=ffffffff85dfcb70 RBP=ffffffff85dfcb70 RSP=ffff888018f873c0 R8 =ffffffff86137736 R9 =ffff888018f874b8 R10=0000000000038001 R11=0000000000020de7 R12=ffffffff85dfcba4 R13=ffffffff85dfcb70 R14=ffffffff85dfcb70 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----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 00007fc47dfa7700 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=00007f7a0a0e60b0 CR3=000000000c5b8000 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=2033353a38313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a38313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d6801 RDX=1ffff11001e83f17 RSI=ffffffff8180c522 RDI=ffff88800f41f878 RBP=ffff88800f41f8d0 RSP=ffff88800f41f808 R8 =ffffffff860d68fa R9 =ffff88800f41f8b8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800f41f8d8 R13=ffff88800f41f8c0 R14=ffff88800f41f8b9 R15=ffff88800f41f878 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007f7a09b2e900 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=00007ff56220ae70 CR3=00000000101de000 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=7296dc31e9164c82ef4032db48f62b1a XMM02=000000000011ef00eff9b2d0a8fce9cb XMM03=000000000011efd02c67c8bc2e329bc3 XMM04=45b43f91cc99f43e00000000000ae988 XMM05=a3270204afc0f2cd0000000000135c50 XMM06=c291bd5c70af25b90000000000135648 XMM07=e042d86d42eb936e0000000000126660 XMM08=41a5d1e92ff1a77e000000000011efd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000