syzkaller login: [ 38.938664] BUG: Bad rss-counter state mm:000000006e07a60e type:MM_FILEPAGES val:33 [ 38.940199] BUG: Bad rss-counter state mm:000000006e07a60e type:MM_ANONPAGES val:22 [ 39.103434] ================================================================== [ 39.104739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.106141] Read of size 8 at addr ffff888017e87b38 by task sshd/218 [ 39.107266] [ 39.107585] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.108844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.110301] Call Trace: [ 39.110749] [ 39.111121] dump_stack_lvl+0x91/0xf0 [ 39.111757] print_report+0xcc/0x620 [ 39.112391] ? __virt_addr_valid+0x102/0x340 [ 39.113116] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.113961] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.114775] kasan_report+0xbe/0xf0 [ 39.115402] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.116226] vma_interval_tree_remove+0xc75/0xec0 [ 39.117022] vma_prepare+0xc54/0x11a0 [ 39.117665] __split_vma+0x5af/0x950 [ 39.118291] ? __pfx___split_vma+0x10/0x10 [ 39.118987] ? find_held_lock+0x2c/0x110 [ 39.119676] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.120418] ? lock_is_held_type+0x9f/0x120 [ 39.121136] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.121968] ? mtree_range_walk+0x632/0x900 [ 39.122704] ? mas_walk+0x5c7/0x7c0 [ 39.123332] do_vmi_munmap+0x1f1/0x2b0 [ 39.123986] mmap_region+0x1f9/0x2660 [ 39.124625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.125301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.126260] ? __pfx_lock_acquire+0x10/0x10 [ 39.126963] ? __pfx_mmap_region+0x10/0x10 [ 39.127672] ? security_mmap_addr+0x7d/0xa0 [ 39.128376] ? get_unmapped_area+0x1f5/0x3f0 [ 39.129116] do_mmap+0x854/0xf00 [ 39.129712] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.130369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.131112] ksys_mmap_pgoff+0x3af/0x500 [ 39.131791] do_syscall_64+0x3f/0x90 [ 39.132429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.133283] RIP: 0033:0x7fb0124a3d82 [ 39.133920] 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 [ 39.136751] RSP: 002b:00007ffe5f24fb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.137972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0124a3d82 [ 39.139107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0118dd000 [ 39.140233] RBP: 00007fb0118dd000 R08: 0000000000000009 R09: 0000000000001000 [ 39.141353] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc86983ec0 [ 39.142068] R13: 00007ffe5f24fb50 R14: 00007ffe5f24fb80 R15: 00007ffe5f24fee0 [ 39.142570] [ 39.142737] [ 39.142861] Allocated by task 211: [ 39.143104] kasan_save_stack+0x22/0x50 [ 39.143396] kasan_set_track+0x25/0x30 [ 39.143682] __kasan_slab_alloc+0x59/0x70 [ 39.143993] kmem_cache_alloc+0x16b/0x370 [ 39.144287] vm_area_dup+0x20/0x160 [ 39.144559] __split_vma+0x170/0x950 [ 39.144838] split_vma+0xc6/0x110 [ 39.145090] mprotect_fixup+0x8d2/0xb30 [ 39.145382] do_mprotect_pkey+0x87e/0xd40 [ 39.145687] __x64_sys_mprotect+0x78/0xc0 [ 39.145992] do_syscall_64+0x3f/0x90 [ 39.146271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.146650] [ 39.146772] Freed by task 19: [ 39.146989] kasan_save_stack+0x22/0x50 [ 39.147284] kasan_set_track+0x25/0x30 [ 39.147571] kasan_save_free_info+0x2b/0x50 [ 39.147871] __kasan_slab_free+0x10a/0x190 [ 39.148180] kmem_cache_free+0x10d/0x4d0 [ 39.148469] rcu_core+0x8c8/0x2860 [ 39.148728] __do_softirq+0x1b7/0x7d4 [ 39.149001] [ 39.149128] Last potentially related work creation: [ 39.149462] kasan_save_stack+0x22/0x50 [ 39.149762] __kasan_record_aux_stack+0x8e/0xa0 [ 39.150097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.150464] remove_vma+0x139/0x170 [ 39.150730] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.151057] do_vmi_munmap+0x1f1/0x2b0 [ 39.151333] __vm_munmap+0x138/0x3a0 [ 39.151598] __x64_sys_munmap+0x59/0x80 [ 39.151882] do_syscall_64+0x3f/0x90 [ 39.152155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.152528] [ 39.152652] The buggy address belongs to the object at ffff888017e87ae0 [ 39.152652] which belongs to the cache vm_area_struct of size 168 [ 39.153497] The buggy address is located 88 bytes inside of [ 39.153497] freed 168-byte region [ffff888017e87ae0, ffff888017e87b88) [ 39.154277] [ 39.154396] The buggy address belongs to the physical page: [ 39.154756] page:00000000a5cbda9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e87 [ 39.155406] memcg:ffff888017eccf01 [ 39.155669] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.156090] page_type: 0xffffffff() [ 39.156348] raw: 0100000000000200 ffff88800879fc80 ffffea00003b4f00 dead000000000005 [ 39.156896] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017eccf01 [ 39.157446] page dumped because: kasan: bad access detected [ 39.157837] [ 39.157960] Memory state around the buggy address: [ 39.158311] ffff888017e87a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.158827] ffff888017e87a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 39.159336] >ffff888017e87b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.159846] ^ [ 39.160218] ffff888017e87b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.160731] ffff888017e87c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.161236] ================================================================== [ 39.162083] Disabling lock debugging due to kernel taint [ 41.786593] BUG: Bad rss-counter state mm:00000000233c4485 type:MM_FILEPAGES val:33 [ 41.787589] BUG: Bad rss-counter state mm:00000000233c4485 type:MM_ANONPAGES val:22 [ 42.295977] BUG: Bad rss-counter state mm:00000000da431c8e type:MM_FILEPAGES val:33 [ 42.296977] BUG: Bad rss-counter state mm:00000000da431c8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47727' (ECDSA) to the list of known hosts. 2023/06/19 19:00:19 fuzzer started 2023/06/19 19:00:20 dialing manager at localhost:44161 2023/06/19 19:00:20 checking machine... 2023/06/19 19:00:20 checking revisions... [ 43.050211] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:00:20 testing simple program... [ 43.103051] cgroup: Unknown subsys name 'net' [ 43.143132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:00:19 Registers: info registers vcpu 0 RAX=ffffed1002d7bf15 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800eaf1b40 RSI=ffffffff81f366f9 RDI=ffffffff8560b640 RBP=1ffff11002d7bf15 RSP=ffff888016bdf898 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81f366f9 R14=ffff888016bdfc20 R15=0000000000000000 RIP=ffffffff812d8660 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 00007fa60e186900 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=00007ffdc8636000 CR3=000000000eb3a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f6cf2c34d30 CR3=000000000e0ac000 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=2039313a30303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000