syzkaller login: [ 31.059812] BUG: Bad rss-counter state mm:00000000585f5a98 type:MM_FILEPAGES val:33 [ 31.060617] BUG: Bad rss-counter state mm:00000000585f5a98 type:MM_ANONPAGES val:22 [ 31.195821] ================================================================== [ 31.196593] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.197387] Read of size 8 at addr ffff888009493968 by task sshd/221 [ 31.198025] [ 31.198209] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.198940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.199912] Call Trace: [ 31.200177] [ 31.200411] dump_stack_lvl+0x91/0xf0 [ 31.200825] print_report+0xcc/0x620 [ 31.201230] ? __virt_addr_valid+0x102/0x340 [ 31.201689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202212] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202725] kasan_report+0xbe/0xf0 [ 31.203122] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203641] vma_interval_tree_remove+0xc75/0xec0 [ 31.204144] vma_prepare+0xc54/0x11a0 [ 31.204561] __split_vma+0x5af/0x950 [ 31.204953] ? __pfx___split_vma+0x10/0x10 [ 31.205394] ? find_held_lock+0x2c/0x110 [ 31.205836] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.206309] ? lock_is_held_type+0x9f/0x120 [ 31.206770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.207284] ? mtree_range_walk+0x632/0x900 [ 31.207751] ? mas_walk+0x5c7/0x7c0 [ 31.208158] do_vmi_munmap+0x1f1/0x2b0 [ 31.208590] mmap_region+0x1f9/0x2660 [ 31.208998] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.209434] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.210045] ? __pfx_lock_acquire+0x10/0x10 [ 31.210497] ? __pfx_mmap_region+0x10/0x10 [ 31.210957] ? security_mmap_addr+0x7d/0xa0 [ 31.211404] ? get_unmapped_area+0x1f5/0x3f0 [ 31.211878] do_mmap+0x854/0xf00 [ 31.212248] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.212690] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213167] ksys_mmap_pgoff+0x3af/0x500 [ 31.213606] do_syscall_64+0x3f/0x90 [ 31.214018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214576] RIP: 0033:0x7f04b115fd82 [ 31.214967] 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 [ 31.216797] RSP: 002b:00007ffdff13b838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.217579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04b115fd82 [ 31.218297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04b0599000 [ 31.219012] RBP: 00007f04b0599000 R08: 0000000000000009 R09: 0000000000001000 [ 31.219743] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bff491ec0 [ 31.220470] R13: 00007ffdff13b850 R14: 00007ffdff13b880 R15: 00007ffdff13bbe0 [ 31.221233] [ 31.221481] [ 31.221662] Allocated by task 214: [ 31.222030] kasan_save_stack+0x22/0x50 [ 31.222460] kasan_set_track+0x25/0x30 [ 31.222880] __kasan_slab_alloc+0x59/0x70 [ 31.223335] kmem_cache_alloc+0x16b/0x370 [ 31.223784] vm_area_dup+0x20/0x160 [ 31.224180] __split_vma+0x170/0x950 [ 31.224585] split_vma+0xc6/0x110 [ 31.224957] mprotect_fixup+0x8d2/0xb30 [ 31.225385] do_mprotect_pkey+0x87e/0xd40 [ 31.225834] __x64_sys_mprotect+0x78/0xc0 [ 31.226289] do_syscall_64+0x3f/0x90 [ 31.226709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227256] [ 31.227445] Freed by task 214: [ 31.227786] kasan_save_stack+0x22/0x50 [ 31.228225] kasan_set_track+0x25/0x30 [ 31.228656] kasan_save_free_info+0x2b/0x50 [ 31.229124] __kasan_slab_free+0x10a/0x190 [ 31.229588] kmem_cache_free+0x10d/0x4d0 [ 31.230023] rcu_core+0x8c8/0x2860 [ 31.230405] __do_softirq+0x1b7/0x7d4 [ 31.230814] [ 31.230997] Last potentially related work creation: [ 31.231491] kasan_save_stack+0x22/0x50 [ 31.231921] __kasan_record_aux_stack+0x8e/0xa0 [ 31.232419] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.232986] remove_vma+0x139/0x170 [ 31.233382] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.233867] do_vmi_munmap+0x1f1/0x2b0 [ 31.234288] __vm_munmap+0x138/0x3a0 [ 31.234701] __x64_sys_munmap+0x59/0x80 [ 31.235126] do_syscall_64+0x3f/0x90 [ 31.235528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.236096] [ 31.236284] The buggy address belongs to the object at ffff888009493910 [ 31.236284] which belongs to the cache vm_area_struct of size 168 [ 31.237578] The buggy address is located 88 bytes inside of [ 31.237578] freed 168-byte region [ffff888009493910, ffff8880094939b8) [ 31.238752] [ 31.238930] The buggy address belongs to the physical page: [ 31.239478] page:000000003a274ff4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9493 [ 31.240474] memcg:ffff88800e89df01 [ 31.240838] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.241377] page_type: 0xffffffff() [ 31.241763] raw: 0100000000000200 ffff8880087a0c80 ffffea00003735c0 dead000000000002 [ 31.242546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e89df01 [ 31.243310] page dumped because: kasan: bad access detected [ 31.243871] [ 31.244060] Memory state around the buggy address: [ 31.244560] ffff888009493800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.245287] ffff888009493880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.246014] >ffff888009493900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246747] ^ [ 31.247409] ffff888009493980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.248153] ffff888009493a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.248887] ================================================================== [ 31.249665] Disabling lock debugging due to kernel taint [ 33.356340] BUG: Bad rss-counter state mm:00000000ad0c8758 type:MM_FILEPAGES val:33 [ 33.357490] BUG: Bad rss-counter state mm:00000000ad0c8758 type:MM_ANONPAGES val:22 [ 33.788079] BUG: Bad rss-counter state mm:000000008890b2ae type:MM_FILEPAGES val:33 [ 33.788854] BUG: Bad rss-counter state mm:000000008890b2ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43591' (ECDSA) to the list of known hosts. 2023/06/21 03:32:47 fuzzer started 2023/06/21 03:32:48 dialing manager at localhost:36067 2023/06/21 03:32:48 checking machine... 2023/06/21 03:32:48 checking revisions... [ 34.451778] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:32:48 testing simple program... [ 34.497882] cgroup: Unknown subsys name 'net' [ 34.550422] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:32:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888015a33680 RCX=ffffffff810ad687 RDX=ffffed1002b466d1 RSI=0000000000000008 RDI=ffff888015a33680 RBP=0000000000000001 RSP=ffff88800d037ee8 R8 =0000000000000001 R9 =ffffed1002b466d0 R10=ffff888015a33687 R11=0000000000000000 R12=ffff888015a34d00 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810ad68c RFL=00000046 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb5557da700 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=00007f9f90cf1c10 CR3=000000000986e000 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=2037343a32333a3330203132206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a323637313520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a32333a3330203132 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=0000000000000001 RDX=ffff888008e37901 RSI=ffff888008e379c8 RDI=ffff888008e379c8 RBP=ffff888008e37988 RSP=ffff888008e37870 R8 =0000000000000001 R9 =ffff888008e37970 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e37990 R13=ffff888008e37978 R14=ffff888008e379c8 R15=ffff888008e37930 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 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=0000563ce25c8954 CR3=000000000986e000 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=32333a3330203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323637 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000