syzkaller login: [ 23.999200] BUG: Bad rss-counter state mm:00000000a3dfbe68 type:MM_FILEPAGES val:33 [ 24.001250] BUG: Bad rss-counter state mm:00000000a3dfbe68 type:MM_ANONPAGES val:22 [ 24.173233] ================================================================== [ 24.174223] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.175247] Read of size 8 at addr ffff88800dd19b38 by task sshd/220 [ 24.176169] [ 24.176406] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.177340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.178405] Call Trace: [ 24.178752] [ 24.179071] dump_stack_lvl+0x91/0xf0 [ 24.179605] print_report+0xcc/0x620 [ 24.180146] ? __virt_addr_valid+0x102/0x340 [ 24.180745] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.181413] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.182082] kasan_report+0xbe/0xf0 [ 24.182600] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.183301] vma_interval_tree_remove+0xc75/0xec0 [ 24.183992] vma_prepare+0xc54/0x11a0 [ 24.184534] __split_vma+0x5af/0x950 [ 24.185075] ? __pfx___split_vma+0x10/0x10 [ 24.185669] ? find_held_lock+0x2c/0x110 [ 24.186248] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.186877] ? lock_is_held_type+0x9f/0x120 [ 24.187484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.188193] ? mtree_range_walk+0x632/0x900 [ 24.188815] ? mas_walk+0x5c7/0x7c0 [ 24.189343] do_vmi_munmap+0x1f1/0x2b0 [ 24.189893] mmap_region+0x1f9/0x2660 [ 24.190436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.190999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.191845] ? __pfx_lock_acquire+0x10/0x10 [ 24.192459] ? __pfx_mmap_region+0x10/0x10 [ 24.193054] ? security_mmap_addr+0x7d/0xa0 [ 24.193641] ? get_unmapped_area+0x1f5/0x3f0 [ 24.194254] do_mmap+0x854/0xf00 [ 24.194745] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.195290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.195939] ksys_mmap_pgoff+0x3af/0x500 [ 24.196501] do_syscall_64+0x3f/0x90 [ 24.197043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.197761] RIP: 0033:0x7f348c7c6d82 [ 24.198271] 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 [ 24.200595] RSP: 002b:00007ffe314e4cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.201642] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f348c7c6d82 [ 24.202816] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f348bc00000 [ 24.204018] RBP: 00007f348bc00000 R08: 0000000000000009 R09: 0000000000001000 [ 24.205200] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d2f55bec0 [ 24.206385] R13: 00007ffe314e4d10 R14: 00007ffe314e4d40 R15: 00007ffe314e50a0 [ 24.207580] [ 24.207979] [ 24.208266] Allocated by task 213: [ 24.208859] kasan_save_stack+0x22/0x50 [ 24.209559] kasan_set_track+0x25/0x30 [ 24.210246] __kasan_slab_alloc+0x59/0x70 [ 24.210965] kmem_cache_alloc+0x16b/0x370 [ 24.211689] vm_area_dup+0x20/0x160 [ 24.212343] __split_vma+0x170/0x950 [ 24.212996] split_vma+0xc6/0x110 [ 24.213598] mprotect_fixup+0x8d2/0xb30 [ 24.214272] do_mprotect_pkey+0x87e/0xd40 [ 24.214971] __x64_sys_mprotect+0x78/0xc0 [ 24.215684] do_syscall_64+0x3f/0x90 [ 24.216327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.217134] [ 24.217385] Freed by task 213: [ 24.217836] kasan_save_stack+0x22/0x50 [ 24.218425] kasan_set_track+0x25/0x30 [ 24.219001] kasan_save_free_info+0x2b/0x50 [ 24.219616] __kasan_slab_free+0x10a/0x190 [ 24.220248] kmem_cache_free+0x10d/0x4d0 [ 24.220836] rcu_core+0x8c8/0x2860 [ 24.221350] __do_softirq+0x1b7/0x7d4 [ 24.221907] [ 24.222158] Last potentially related work creation: [ 24.222830] kasan_save_stack+0x22/0x50 [ 24.223413] __kasan_record_aux_stack+0x8e/0xa0 [ 24.224099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.224847] remove_vma+0x139/0x170 [ 24.225371] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.226018] do_vmi_munmap+0x1f1/0x2b0 [ 24.226586] __vm_munmap+0x138/0x3a0 [ 24.227122] __x64_sys_munmap+0x59/0x80 [ 24.227689] do_syscall_64+0x3f/0x90 [ 24.228242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.228975] [ 24.229220] Second to last potentially related work creation: [ 24.230000] kasan_save_stack+0x22/0x50 [ 24.230574] __kasan_record_aux_stack+0x8e/0xa0 [ 24.231225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.231985] remove_vma+0x139/0x170 [ 24.232503] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.233141] do_vmi_munmap+0x1f1/0x2b0 [ 24.233699] mmap_region+0x1f9/0x2660 [ 24.234242] do_mmap+0x854/0xf00 [ 24.234733] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.235292] ksys_mmap_pgoff+0x3af/0x500 [ 24.235878] do_syscall_64+0x3f/0x90 [ 24.236424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.237166] [ 24.237410] The buggy address belongs to the object at ffff88800dd19ae0 [ 24.237410] which belongs to the cache vm_area_struct of size 168 [ 24.239104] The buggy address is located 88 bytes inside of [ 24.239104] freed 168-byte region [ffff88800dd19ae0, ffff88800dd19b88) [ 24.240713] [ 24.240959] The buggy address belongs to the physical page: [ 24.241712] page:0000000085e71ff3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd19 [ 24.242937] memcg:ffff88800e110501 [ 24.243424] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.244260] page_type: 0xffffffff() [ 24.244768] raw: 0100000000000200 ffff8880087a0c80 ffffea00003be700 dead000000000005 [ 24.245816] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e110501 [ 24.246853] page dumped because: kasan: bad access detected [ 24.247610] [ 24.247859] Memory state around the buggy address: [ 24.248518] ffff88800dd19a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.249489] ffff88800dd19a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.250465] >ffff88800dd19b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.251439] ^ [ 24.252170] ffff88800dd19b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.253295] ffff88800dd19c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.254450] ================================================================== [ 24.255864] Disabling lock debugging due to kernel taint [ 26.052839] BUG: Bad rss-counter state mm:00000000e5140945 type:MM_FILEPAGES val:33 [ 26.053635] BUG: Bad rss-counter state mm:00000000e5140945 type:MM_ANONPAGES val:22 [ 26.523139] BUG: Bad rss-counter state mm:0000000043048ad0 type:MM_FILEPAGES val:33 [ 26.524133] BUG: Bad rss-counter state mm:0000000043048ad0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24432' (ECDSA) to the list of known hosts. 2023/06/21 03:49:44 fuzzer started 2023/06/21 03:49:44 dialing manager at localhost:36067 2023/06/21 03:49:45 checking machine... 2023/06/21 03:49:45 checking revisions... [ 27.253453] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:49:45 testing simple program... [ 27.304442] cgroup: Unknown subsys name 'net' [ 27.340080] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007f9d6e431d48 RSP=ffff88806ce09a20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=00007f9d6e431d48 R13=0000000000000000 R14=ffff8880145ab680 R15=ffff8880139737a0 RIP=ffffffff814c8496 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9d6d8ae900 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=00007f9d6cdcc000 CR3=000000000e610000 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=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=24dcd5aeb6df69c600000000000ae988 XMM05=4ea95816bb8eb3b70000000000132c78 XMM06=9539e3eccfe175b500000000001319b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f199800 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800f199828 RBP=ffff888016a94f08 RSP=ffff88800cf57478 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000005cc000005cc R12=ffff88800cb4b500 R13=ffff88800f19986c R14=00000000ffffffff R15=ffff88800f199828 RIP=ffffffff812e0026 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 00007fe237865900 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=00007fe237e1c618 CR3=00000000162cc000 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=39343a3330203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000