syzkaller login: [ 31.195505] BUG: Bad rss-counter state mm:000000000c3dbacb type:MM_FILEPAGES val:33 [ 31.196746] BUG: Bad rss-counter state mm:000000000c3dbacb type:MM_ANONPAGES val:22 [ 31.222113] ================================================================== [ 31.222683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.223190] Read of size 8 at addr ffff88800f33b4e0 by task sshd/221 [ 31.223608] [ 31.223726] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.224188] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.224726] Call Trace: [ 31.224901] [ 31.225055] dump_stack_lvl+0x91/0xf0 [ 31.225322] print_report+0xcc/0x620 [ 31.225585] ? __virt_addr_valid+0x102/0x340 [ 31.225893] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226227] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226563] kasan_report+0xbe/0xf0 [ 31.226821] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227156] vma_interval_tree_remove+0xc75/0xec0 [ 31.227481] vma_prepare+0xc54/0x11a0 [ 31.227743] __split_vma+0x5af/0x950 [ 31.228000] ? __pfx___split_vma+0x10/0x10 [ 31.228290] ? find_held_lock+0x2c/0x110 [ 31.228587] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.228890] ? lock_is_held_type+0x9f/0x120 [ 31.229181] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.229510] ? mtree_range_walk+0x632/0x900 [ 31.229807] ? mas_walk+0x5c7/0x7c0 [ 31.230065] do_vmi_munmap+0x1f1/0x2b0 [ 31.230330] mmap_region+0x1f9/0x2660 [ 31.230592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.230870] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.231259] ? __pfx_lock_acquire+0x10/0x10 [ 31.231570] ? __pfx_mmap_region+0x10/0x10 [ 31.231872] ? security_mmap_addr+0x7d/0xa0 [ 31.232174] ? get_unmapped_area+0x1f5/0x3f0 [ 31.232498] do_mmap+0x854/0xf00 [ 31.232752] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.233033] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.233356] ksys_mmap_pgoff+0x3af/0x500 [ 31.233648] do_syscall_64+0x3f/0x90 [ 31.233922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234290] RIP: 0033:0x7f85bcbaed82 [ 31.234553] 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 [ 31.235894] RSP: 002b:00007ffe87464848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.236418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85bcbaed82 [ 31.236906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85bbfe8000 [ 31.237396] RBP: 00007f85bbfe8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237901] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc6db7ad90 [ 31.238376] R13: 00007ffe87464860 R14: 00007ffe87464890 R15: 00007ffe87464bf0 [ 31.238865] [ 31.239038] [ 31.239162] Allocated by task 214: [ 31.239411] kasan_save_stack+0x22/0x50 [ 31.239702] kasan_set_track+0x25/0x30 [ 31.239982] __kasan_slab_alloc+0x59/0x70 [ 31.240281] kmem_cache_alloc+0x16b/0x370 [ 31.240587] vm_area_dup+0x20/0x160 [ 31.240854] __split_vma+0x170/0x950 [ 31.241122] split_vma+0xc6/0x110 [ 31.241371] mprotect_fixup+0x8d2/0xb30 [ 31.241655] do_mprotect_pkey+0x87e/0xd40 [ 31.241954] __x64_sys_mprotect+0x78/0xc0 [ 31.242253] do_syscall_64+0x3f/0x90 [ 31.242518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.242884] [ 31.243009] Freed by task 214: [ 31.243233] kasan_save_stack+0x22/0x50 [ 31.243520] kasan_set_track+0x25/0x30 [ 31.243804] kasan_save_free_info+0x2b/0x50 [ 31.244103] __kasan_slab_free+0x10a/0x190 [ 31.244408] kmem_cache_free+0x10d/0x4d0 [ 31.244700] rcu_core+0x8c8/0x2860 [ 31.244954] __do_softirq+0x1b7/0x7d4 [ 31.245233] [ 31.245357] Last potentially related work creation: [ 31.245693] kasan_save_stack+0x22/0x50 [ 31.245984] __kasan_record_aux_stack+0x8e/0xa0 [ 31.246312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.246681] remove_vma+0x139/0x170 [ 31.246940] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.247254] do_vmi_munmap+0x1f1/0x2b0 [ 31.247530] __vm_munmap+0x138/0x3a0 [ 31.247799] __x64_sys_munmap+0x59/0x80 [ 31.248080] do_syscall_64+0x3f/0x90 [ 31.248360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248728] [ 31.248856] The buggy address belongs to the object at ffff88800f33b488 [ 31.248856] which belongs to the cache vm_area_struct of size 168 [ 31.249708] The buggy address is located 88 bytes inside of [ 31.249708] freed 168-byte region [ffff88800f33b488, ffff88800f33b530) [ 31.250519] [ 31.250644] The buggy address belongs to the physical page: [ 31.251021] page:000000005cf76536 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf33b [ 31.251656] memcg:ffff888009b12901 [ 31.251902] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.252311] page_type: 0xffffffff() [ 31.252586] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 31.253123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b12901 [ 31.253643] page dumped because: kasan: bad access detected [ 31.254031] [ 31.254152] Memory state around the buggy address: [ 31.254489] ffff88800f33b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.254975] ffff88800f33b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.255460] >ffff88800f33b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.255951] ^ [ 31.256383] ffff88800f33b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.256875] ffff88800f33b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.257375] ================================================================== [ 31.258017] Disabling lock debugging due to kernel taint [ 33.459636] BUG: Bad rss-counter state mm:000000000d8d88e4 type:MM_FILEPAGES val:33 [ 33.460671] BUG: Bad rss-counter state mm:000000000d8d88e4 type:MM_ANONPAGES val:22 [ 33.881758] BUG: Bad rss-counter state mm:000000002e2b7918 type:MM_FILEPAGES val:33 [ 33.882975] BUG: Bad rss-counter state mm:000000002e2b7918 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54913' (ECDSA) to the list of known hosts. 2023/06/20 07:53:24 fuzzer started 2023/06/20 07:53:24 dialing manager at localhost:44161 2023/06/20 07:53:24 checking machine... 2023/06/20 07:53:24 checking revisions... [ 34.568726] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:53:24 testing simple program... [ 34.614121] cgroup: Unknown subsys name 'net' [ 34.651743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:21 Registers: info registers vcpu 0 RAX=ffffffff8613dd35 RBX=0000000000000001 RCX=ffffffff8613dd30 RDX=0000000000000000 RSI=1ffffffff0c27ba6 RDI=ffffffff85e00f50 RBP=ffff88800fda78d0 RSP=ffff88800fda7808 R8 =ffffffff8613dd06 R9 =ffff88800fda78b8 R10=0000000000038001 R11=0000000000021edf R12=ffff88800fda78d8 R13=ffff88800fda78c0 R14=ffff88800fda78b9 R15=ffff88800fda7878 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 00007f46ac97f900 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=00007f46acf34650 CR3=000000000c4f6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff8c027b18 CR3=000000000ea64000 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=2034323a33353a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33353a3730203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000