syzkaller login: [ 76.927341] BUG: Bad rss-counter state mm:000000008007f18c type:MM_FILEPAGES val:33 [ 76.928841] BUG: Bad rss-counter state mm:000000008007f18c type:MM_ANONPAGES val:22 [ 77.095385] ================================================================== [ 77.096474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 77.097586] Read of size 8 at addr ffff88800ee93968 by task sshd/221 [ 77.098508] [ 77.098842] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 77.100096] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 77.101225] Call Trace: [ 77.101560] [ 77.101833] dump_stack_lvl+0x91/0xf0 [ 77.102338] print_report+0xcc/0x620 [ 77.102806] ? __virt_addr_valid+0x102/0x340 [ 77.103362] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.103989] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.104615] kasan_report+0xbe/0xf0 [ 77.105131] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.105933] vma_interval_tree_remove+0xc75/0xec0 [ 77.106712] vma_prepare+0xc54/0x11a0 [ 77.107330] __split_vma+0x5af/0x950 [ 77.107945] ? __pfx___split_vma+0x10/0x10 [ 77.108631] ? find_held_lock+0x2c/0x110 [ 77.109312] do_vmi_align_munmap+0x2ba/0x11f0 [ 77.110018] ? lock_is_held_type+0x9f/0x120 [ 77.110712] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 77.111497] ? mtree_range_walk+0x632/0x900 [ 77.112220] ? mas_walk+0x5c7/0x7c0 [ 77.112827] do_vmi_munmap+0x1f1/0x2b0 [ 77.113356] mmap_region+0x1f9/0x2660 [ 77.113836] ? vm_mmap_pgoff+0x15c/0x3a0 [ 77.114356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 77.115072] ? __pfx_lock_acquire+0x10/0x10 [ 77.115614] ? __pfx_mmap_region+0x10/0x10 [ 77.116159] ? security_mmap_addr+0x7d/0xa0 [ 77.116702] ? get_unmapped_area+0x1f5/0x3f0 [ 77.117252] do_mmap+0x854/0xf00 [ 77.117696] vm_mmap_pgoff+0x1a6/0x3a0 [ 77.118192] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 77.118756] ksys_mmap_pgoff+0x3af/0x500 [ 77.119257] do_syscall_64+0x3f/0x90 [ 77.119740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.120403] RIP: 0033:0x7f8d21085d82 [ 77.120854] 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 [ 77.122989] RSP: 002b:00007ffdd30af898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 77.123900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d21085d82 [ 77.124778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d204bf000 [ 77.125642] RBP: 00007f8d204bf000 R08: 0000000000000009 R09: 0000000000001000 [ 77.126494] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f4245ad90 [ 77.127363] R13: 00007ffdd30af8b0 R14: 00007ffdd30af8e0 R15: 00007ffdd30afc40 [ 77.128228] [ 77.128530] [ 77.128740] Allocated by task 214: [ 77.129164] kasan_save_stack+0x22/0x50 [ 77.129685] kasan_set_track+0x25/0x30 [ 77.130174] __kasan_slab_alloc+0x59/0x70 [ 77.130712] kmem_cache_alloc+0x16b/0x370 [ 77.131227] vm_area_dup+0x20/0x160 [ 77.131680] __split_vma+0x170/0x950 [ 77.132161] split_vma+0xc6/0x110 [ 77.132614] mprotect_fixup+0x8d2/0xb30 [ 77.133106] do_mprotect_pkey+0x87e/0xd40 [ 77.133652] __x64_sys_mprotect+0x78/0xc0 [ 77.134180] do_syscall_64+0x3f/0x90 [ 77.134659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.135308] [ 77.135523] Freed by task 214: [ 77.135918] kasan_save_stack+0x22/0x50 [ 77.136465] kasan_set_track+0x25/0x30 [ 77.136952] kasan_save_free_info+0x2b/0x50 [ 77.137510] __kasan_slab_free+0x10a/0x190 [ 77.138033] kmem_cache_free+0x10d/0x4d0 [ 77.138554] rcu_core+0x8c8/0x2860 [ 77.138997] __do_softirq+0x1b7/0x7d4 [ 77.139473] [ 77.139684] Last potentially related work creation: [ 77.140262] kasan_save_stack+0x22/0x50 [ 77.140753] __kasan_record_aux_stack+0x8e/0xa0 [ 77.141318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 77.141930] remove_vma+0x139/0x170 [ 77.142371] do_vmi_align_munmap+0xd4a/0x11f0 [ 77.142900] do_vmi_munmap+0x1f1/0x2b0 [ 77.143388] __vm_munmap+0x138/0x3a0 [ 77.143841] __x64_sys_munmap+0x59/0x80 [ 77.144340] do_syscall_64+0x3f/0x90 [ 77.144791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.145443] [ 77.145657] The buggy address belongs to the object at ffff88800ee93910 [ 77.145657] which belongs to the cache vm_area_struct of size 168 [ 77.147121] The buggy address is located 88 bytes inside of [ 77.147121] freed 168-byte region [ffff88800ee93910, ffff88800ee939b8) [ 77.148570] [ 77.148782] The buggy address belongs to the physical page: [ 77.149452] page:0000000001fdbc4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee93 [ 77.150549] memcg:ffff888019c37d01 [ 77.150969] flags: 0x100000000000200(slab|node=0|zone=1) [ 77.151625] page_type: 0xffffffff() [ 77.152083] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 77.153018] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c37d01 [ 77.153928] page dumped because: kasan: bad access detected [ 77.154603] [ 77.154814] Memory state around the buggy address: [ 77.155408] ffff88800ee93800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 77.156287] ffff88800ee93880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 77.157152] >ffff88800ee93900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 77.158006] ^ [ 77.158793] ffff88800ee93980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 77.159647] ffff88800ee93a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 77.160524] ================================================================== [ 77.161582] Disabling lock debugging due to kernel taint [ 79.883465] BUG: Bad rss-counter state mm:00000000b45f9b17 type:MM_FILEPAGES val:33 [ 79.884469] BUG: Bad rss-counter state mm:00000000b45f9b17 type:MM_ANONPAGES val:22 [ 80.374369] BUG: Bad rss-counter state mm:00000000b15deca7 type:MM_FILEPAGES val:33 [ 80.375361] BUG: Bad rss-counter state mm:00000000b15deca7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1740' (ECDSA) to the list of known hosts. 2023/06/20 04:44:22 fuzzer started 2023/06/20 04:44:22 dialing manager at localhost:44161 2023/06/20 04:44:22 checking machine... 2023/06/20 04:44:22 checking revisions... [ 81.084433] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:44:22 testing simple program... [ 81.133807] cgroup: Unknown subsys name 'net' [ 81.175048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:43:35 Registers: info registers vcpu 0 RAX=1ffffffff0c26e97 RBX=0000000000000001 RCX=ffffffff861374ba RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88800d9af388 RBP=ffff88800d9af378 RSP=ffff88800d9af2b0 R8 =ffffffff861374be R9 =ffff88800d9af360 R10=0000000000038001 R11=0000000000020d78 R12=ffff88800d9af380 R13=ffff88800d9af368 R14=ffff88800d9af6a8 R15=ffff88800d9af320 RIP=ffffffff81131118 RFL=00000213 [----A-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 00007fe32e356900 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=00007fe32d7d0e30 CR3=000000000d5f0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=851016f222a1e82d00000000000ae988 XMM05=c7ce83d2e94fc6c4000000000013b540 XMM06=00c3ffa147b8d857000000000013a330 XMM07=fb795ef6d6577056000000000012a2f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801761ff01 RSI=ffff88801761ff48 RDI=ffff88801761ff48 RBP=ffff88801761f750 RSP=ffff88801761f688 R8 =0000000000000001 R9 =ffff88801761f738 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88801761f758 R13=ffff88801761f740 R14=ffff88801761ff48 R15=ffff88801761f6f8 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f3f88fb3900 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=00007ffdac90d000 CR3=000000000f71a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000