syzkaller login: [ 30.203823] BUG: Bad rss-counter state mm:00000000bb459ad7 type:MM_FILEPAGES val:33 [ 30.205425] BUG: Bad rss-counter state mm:00000000bb459ad7 type:MM_ANONPAGES val:22 [ 30.361379] ================================================================== [ 30.362305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.363256] Read of size 8 at addr ffff88800f5b64e0 by task sshd/219 [ 30.364031] [ 30.364256] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.365229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.366195] Call Trace: [ 30.366512] [ 30.366818] dump_stack_lvl+0x91/0xf0 [ 30.367314] print_report+0xcc/0x620 [ 30.367800] ? __virt_addr_valid+0x102/0x340 [ 30.368356] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.368972] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.369589] kasan_report+0xbe/0xf0 [ 30.370066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.370704] vma_interval_tree_remove+0xc75/0xec0 [ 30.371308] vma_prepare+0xc54/0x11a0 [ 30.371796] __split_vma+0x5af/0x950 [ 30.372273] ? __pfx___split_vma+0x10/0x10 [ 30.372809] ? find_held_lock+0x2c/0x110 [ 30.373331] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.373897] ? lock_is_held_type+0x9f/0x120 [ 30.374443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.375069] ? mtree_range_walk+0x632/0x900 [ 30.375621] ? mas_walk+0x5c7/0x7c0 [ 30.376104] do_vmi_munmap+0x1f1/0x2b0 [ 30.376598] mmap_region+0x1f9/0x2660 [ 30.377087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.377604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.378321] ? __pfx_lock_acquire+0x10/0x10 [ 30.378870] ? __pfx_mmap_region+0x10/0x10 [ 30.379396] ? security_mmap_addr+0x7d/0xa0 [ 30.379926] ? get_unmapped_area+0x1f5/0x3f0 [ 30.380474] do_mmap+0x854/0xf00 [ 30.380910] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.381400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.381958] ksys_mmap_pgoff+0x3af/0x500 [ 30.382469] do_syscall_64+0x3f/0x90 [ 30.382963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.383607] RIP: 0033:0x7f1992f36d82 [ 30.384063] 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 [ 30.386204] RSP: 002b:00007ffcdeeb05f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.387147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1992f36d82 [ 30.388012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1992370000 [ 30.388865] RBP: 00007f1992370000 R08: 0000000000000009 R09: 0000000000001000 [ 30.389721] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ca573bec0 [ 30.390600] R13: 00007ffcdeeb0610 R14: 00007ffcdeeb0640 R15: 00007ffcdeeb09a0 [ 30.391465] [ 30.391769] [ 30.391993] Allocated by task 212: [ 30.392427] kasan_save_stack+0x22/0x50 [ 30.392926] kasan_set_track+0x25/0x30 [ 30.393421] __kasan_slab_alloc+0x59/0x70 [ 30.393953] kmem_cache_alloc+0x16b/0x370 [ 30.394485] vm_area_dup+0x20/0x160 [ 30.394977] __split_vma+0x170/0x950 [ 30.395460] split_vma+0xc6/0x110 [ 30.395904] mprotect_fixup+0x8d2/0xb30 [ 30.396413] do_mprotect_pkey+0x87e/0xd40 [ 30.396937] __x64_sys_mprotect+0x78/0xc0 [ 30.397465] do_syscall_64+0x3f/0x90 [ 30.397950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.398604] [ 30.398831] Freed by task 212: [ 30.399229] kasan_save_stack+0x22/0x50 [ 30.399730] kasan_set_track+0x25/0x30 [ 30.400221] kasan_save_free_info+0x2b/0x50 [ 30.400763] __kasan_slab_free+0x10a/0x190 [ 30.401304] kmem_cache_free+0x10d/0x4d0 [ 30.401818] rcu_core+0x8c8/0x2860 [ 30.402279] __do_softirq+0x1b7/0x7d4 [ 30.402769] [ 30.402985] Last potentially related work creation: [ 30.403565] kasan_save_stack+0x22/0x50 [ 30.404074] __kasan_record_aux_stack+0x8e/0xa0 [ 30.404655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.405317] remove_vma+0x139/0x170 [ 30.405774] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.406344] do_vmi_munmap+0x1f1/0x2b0 [ 30.406866] __vm_munmap+0x138/0x3a0 [ 30.407341] __x64_sys_munmap+0x59/0x80 [ 30.407856] do_syscall_64+0x3f/0x90 [ 30.408338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.408980] [ 30.409207] The buggy address belongs to the object at ffff88800f5b6488 [ 30.409207] which belongs to the cache vm_area_struct of size 168 [ 30.410708] The buggy address is located 88 bytes inside of [ 30.410708] freed 168-byte region [ffff88800f5b6488, ffff88800f5b6530) [ 30.412134] [ 30.412352] The buggy address belongs to the physical page: [ 30.413012] page:000000007b0c8894 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5b6 [ 30.414100] memcg:ffff88800dda5b01 [ 30.414530] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.415257] page_type: 0xffffffff() [ 30.415711] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 30.416642] raw: 0000000000000000 0000000080110011 00000001ffffffff ffff88800dda5b01 [ 30.417551] page dumped because: kasan: bad access detected [ 30.418214] [ 30.418430] Memory state around the buggy address: [ 30.419039] ffff88800f5b6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.419905] ffff88800f5b6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.420765] >ffff88800f5b6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.421639] ^ [ 30.422399] ffff88800f5b6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.423276] ffff88800f5b6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.424155] ================================================================== [ 30.425152] Disabling lock debugging due to kernel taint [ 32.872779] BUG: Bad rss-counter state mm:00000000b726f3d8 type:MM_FILEPAGES val:33 [ 32.874235] BUG: Bad rss-counter state mm:00000000b726f3d8 type:MM_ANONPAGES val:22 [ 33.335564] BUG: Bad rss-counter state mm:00000000b1273b8b type:MM_FILEPAGES val:33 [ 33.336598] BUG: Bad rss-counter state mm:00000000b1273b8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35916' (ECDSA) to the list of known hosts. 2023/06/21 06:32:34 fuzzer started 2023/06/21 06:32:35 dialing manager at localhost:36067 2023/06/21 06:32:35 checking machine... 2023/06/21 06:32:35 checking revisions... [ 34.064020] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:32:35 testing simple program... [ 34.115023] cgroup: Unknown subsys name 'net' [ 34.156139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:32:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861c9048 RDX=0000000000000008 RSI=ffff88800e757cc8 RDI=ffff88800e7579e0 RBP=ffff88800e757a38 RSP=ffff88800e757968 R8 =0000000000000001 R9 =ffff88800e757a20 R10=0000000000038001 R11=0000000000038ddb R12=ffff88800e757a40 R13=ffff88800e757a28 R14=ffff88800e757cc8 R15=ffff88800e7579e0 RIP=ffffffff811303fa RFL=00000283 [--S---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 00007f677916f900 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=00007f6779724650 CR3=000000000c9fe000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffdbc114488 CR3=000000000dd5c000 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=32333a3630203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732034333a3233 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303432 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000