syzkaller login: [ 43.146303] BUG: Bad rss-counter state mm:0000000059e7963e type:MM_FILEPAGES val:33 [ 43.147812] BUG: Bad rss-counter state mm:0000000059e7963e type:MM_ANONPAGES val:22 [ 43.265632] ================================================================== [ 43.266262] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.266903] Read of size 8 at addr ffff888018c35ed8 by task sshd/218 [ 43.267436] [ 43.267583] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.268181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.268836] Call Trace: [ 43.269049] [ 43.269242] dump_stack_lvl+0x91/0xf0 [ 43.269566] print_report+0xcc/0x620 [ 43.269882] ? __virt_addr_valid+0x102/0x340 [ 43.270250] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.270656] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.271059] kasan_report+0xbe/0xf0 [ 43.271494] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.272050] vma_interval_tree_remove+0xc75/0xec0 [ 43.272481] vma_prepare+0xc54/0x11a0 [ 43.272794] __split_vma+0x5af/0x950 [ 43.273103] ? __pfx___split_vma+0x10/0x10 [ 43.273454] ? find_held_lock+0x2c/0x110 [ 43.273797] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.274167] ? lock_is_held_type+0x9f/0x120 [ 43.274527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.274924] ? mtree_range_walk+0x632/0x900 [ 43.275294] ? mas_walk+0x5c7/0x7c0 [ 43.275605] do_vmi_munmap+0x1f1/0x2b0 [ 43.275929] mmap_region+0x1f9/0x2660 [ 43.276243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.276575] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.277047] ? __pfx_lock_acquire+0x10/0x10 [ 43.277398] ? __pfx_mmap_region+0x10/0x10 [ 43.277749] ? security_mmap_addr+0x7d/0xa0 [ 43.278093] ? get_unmapped_area+0x1f5/0x3f0 [ 43.278450] do_mmap+0x854/0xf00 [ 43.278731] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.279051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.279440] ksys_mmap_pgoff+0x3af/0x500 [ 43.279767] do_syscall_64+0x3f/0x90 [ 43.280075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.280498] RIP: 0033:0x7f40cf486d82 [ 43.280793] 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 [ 43.282210] RSP: 002b:00007ffe7f5b9658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.282814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40cf486d82 [ 43.283383] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40ce8c0000 [ 43.283936] RBP: 00007f40ce8c0000 R08: 0000000000000009 R09: 0000000000001000 [ 43.284490] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a40ca53f60 [ 43.285065] R13: 00007ffe7f5b9670 R14: 00007ffe7f5b96a0 R15: 00007ffe7f5b9a00 [ 43.285601] [ 43.285785] [ 43.285914] Allocated by task 211: [ 43.286182] kasan_save_stack+0x22/0x50 [ 43.286491] kasan_set_track+0x25/0x30 [ 43.286825] __kasan_slab_alloc+0x59/0x70 [ 43.287184] kmem_cache_alloc+0x16b/0x370 [ 43.287522] vm_area_dup+0x20/0x160 [ 43.287819] __split_vma+0x170/0x950 [ 43.288128] split_vma+0xc6/0x110 [ 43.288390] mprotect_fixup+0x8d2/0xb30 [ 43.288686] do_mprotect_pkey+0x87e/0xd40 [ 43.288983] __x64_sys_mprotect+0x78/0xc0 [ 43.289273] do_syscall_64+0x3f/0x90 [ 43.289558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.289962] [ 43.290095] Freed by task 202: [ 43.290346] kasan_save_stack+0x22/0x50 [ 43.290664] kasan_set_track+0x25/0x30 [ 43.290971] kasan_save_free_info+0x2b/0x50 [ 43.291282] __kasan_slab_free+0x10a/0x190 [ 43.291572] kmem_cache_free+0x10d/0x4d0 [ 43.291851] rcu_core+0x8c8/0x2860 [ 43.292094] __do_softirq+0x1b7/0x7d4 [ 43.292359] [ 43.292479] Last potentially related work creation: [ 43.292803] kasan_save_stack+0x22/0x50 [ 43.293079] __kasan_record_aux_stack+0x8e/0xa0 [ 43.293398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.293750] remove_vma+0x139/0x170 [ 43.293997] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.294333] do_vmi_munmap+0x1f1/0x2b0 [ 43.294658] __vm_munmap+0x138/0x3a0 [ 43.294934] __x64_sys_munmap+0x59/0x80 [ 43.295230] do_syscall_64+0x3f/0x90 [ 43.295500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.295849] [ 43.295967] Second to last potentially related work creation: [ 43.296342] kasan_save_stack+0x22/0x50 [ 43.296616] __kasan_record_aux_stack+0x8e/0xa0 [ 43.296925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.297273] remove_vma+0x139/0x170 [ 43.297517] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.297818] do_vmi_munmap+0x1f1/0x2b0 [ 43.298080] mmap_region+0x1f9/0x2660 [ 43.298342] do_mmap+0x854/0xf00 [ 43.298599] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.298896] ksys_mmap_pgoff+0x3af/0x500 [ 43.299229] do_syscall_64+0x3f/0x90 [ 43.299524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.299918] [ 43.300040] The buggy address belongs to the object at ffff888018c35e80 [ 43.300040] which belongs to the cache vm_area_struct of size 168 [ 43.300930] The buggy address is located 88 bytes inside of [ 43.300930] freed 168-byte region [ffff888018c35e80, ffff888018c35f28) [ 43.301818] [ 43.301938] The buggy address belongs to the physical page: [ 43.302304] page:000000001ba39a5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c35 [ 43.302938] memcg:ffff88800d060501 [ 43.303205] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.303623] page_type: 0xffffffff() [ 43.303896] raw: 0100000000000200 ffff88800879fc80 ffffea0000630c00 dead000000000005 [ 43.304431] raw: 0000000000000000 0000000080110011 00000001ffffffff ffff88800d060501 [ 43.304941] page dumped because: kasan: bad access detected [ 43.305316] [ 43.305439] Memory state around the buggy address: [ 43.305786] ffff888018c35d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.306308] ffff888018c35e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 43.306834] >ffff888018c35e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.307341] ^ [ 43.307744] ffff888018c35f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 43.308217] ffff888018c35f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.308688] ================================================================== [ 43.309483] Disabling lock debugging due to kernel taint [ 45.712159] BUG: Bad rss-counter state mm:000000009e934b8e type:MM_FILEPAGES val:33 [ 45.713132] BUG: Bad rss-counter state mm:000000009e934b8e type:MM_ANONPAGES val:22 [ 46.333757] BUG: Bad rss-counter state mm:000000005fdbc97c type:MM_FILEPAGES val:33 [ 46.334985] BUG: Bad rss-counter state mm:000000005fdbc97c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44088' (ECDSA) to the list of known hosts. 2023/06/20 06:00:02 fuzzer started 2023/06/20 06:00:02 dialing manager at localhost:44161 2023/06/20 06:00:02 checking machine... 2023/06/20 06:00:02 checking revisions... [ 46.978210] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:00:02 testing simple program... [ 47.015078] cgroup: Unknown subsys name 'net' [ 47.064606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:59:57 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff8880199a7cc8 RSI=ffff8880199a7ca0 RDI=ffff8880199a7948 RBP=ffff8880199a0000 RSP=ffff8880199a7908 R8 =0000000000000001 R9 =ffff8880199a7978 R10=0000000000038001 R11=0000000000020de7 R12=ffff8880199a7998 R13=ffff8880199a7980 R14=ffff8880199a7ca0 R15=ffff8880199a7938 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007f752dfa9900 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=00007f752e5610b0 CR3=0000000018ca8000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=0000000000000001 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=00007f0804486f80 CR3=0000000015ff0000 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=2032303a30303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a30303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000