syzkaller login: [ 28.738163] BUG: Bad rss-counter state mm:00000000448b2a0a type:MM_FILEPAGES val:33 [ 28.739651] BUG: Bad rss-counter state mm:00000000448b2a0a type:MM_ANONPAGES val:22 [ 28.893305] ================================================================== [ 28.894428] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.895663] Read of size 8 at addr ffff88801a26f228 by task sshd/220 [ 28.896457] [ 28.896676] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.897576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.898578] Call Trace: [ 28.898901] [ 28.899189] dump_stack_lvl+0x91/0xf0 [ 28.899708] print_report+0xcc/0x620 [ 28.900209] ? __virt_addr_valid+0x102/0x340 [ 28.900777] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901405] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902026] kasan_report+0xbe/0xf0 [ 28.902512] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.903138] vma_interval_tree_remove+0xc75/0xec0 [ 28.903767] vma_prepare+0xc54/0x11a0 [ 28.904293] __split_vma+0x5af/0x950 [ 28.904786] ? __pfx___split_vma+0x10/0x10 [ 28.905346] ? find_held_lock+0x2c/0x110 [ 28.905877] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.906460] ? lock_is_held_type+0x9f/0x120 [ 28.906997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.907639] ? mtree_range_walk+0x632/0x900 [ 28.908214] ? mas_walk+0x5c7/0x7c0 [ 28.908725] do_vmi_munmap+0x1f1/0x2b0 [ 28.909226] mmap_region+0x1f9/0x2660 [ 28.909854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.910517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.911285] ? __pfx_lock_acquire+0x10/0x10 [ 28.911846] ? __pfx_mmap_region+0x10/0x10 [ 28.912449] ? security_mmap_addr+0x7d/0xa0 [ 28.913003] ? get_unmapped_area+0x1f5/0x3f0 [ 28.913592] do_mmap+0x854/0xf00 [ 28.914047] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.914567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.915162] ksys_mmap_pgoff+0x3af/0x500 [ 28.915714] do_syscall_64+0x3f/0x90 [ 28.916230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.916935] RIP: 0033:0x7f8de2444d82 [ 28.917428] 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 [ 28.919687] RSP: 002b:00007fffe8f97a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.920684] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8de2444d82 [ 28.921585] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8de187e000 [ 28.922478] RBP: 00007f8de187e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.923369] R10: 0000000000000812 R11: 0000000000000206 R12: 000055926558af70 [ 28.924266] R13: 00007fffe8f97a80 R14: 00007fffe8f97ab0 R15: 00007fffe8f97e10 [ 28.925166] [ 28.925496] [ 28.925724] Allocated by task 213: [ 28.926177] kasan_save_stack+0x22/0x50 [ 28.926719] kasan_set_track+0x25/0x30 [ 28.927234] __kasan_slab_alloc+0x59/0x70 [ 28.927803] kmem_cache_alloc+0x16b/0x370 [ 28.928368] vm_area_dup+0x20/0x160 [ 28.928852] __split_vma+0x170/0x950 [ 28.929360] split_vma+0xc6/0x110 [ 28.929831] mprotect_fixup+0x8d2/0xb30 [ 28.930366] do_mprotect_pkey+0x87e/0xd40 [ 28.930907] __x64_sys_mprotect+0x78/0xc0 [ 28.931464] do_syscall_64+0x3f/0x90 [ 28.931959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932664] [ 28.932888] Freed by task 213: [ 28.933306] kasan_save_stack+0x22/0x50 [ 28.933861] kasan_set_track+0x25/0x30 [ 28.934393] kasan_save_free_info+0x2b/0x50 [ 28.934944] __kasan_slab_free+0x10a/0x190 [ 28.935515] kmem_cache_free+0x10d/0x4d0 [ 28.936054] rcu_core+0x8c8/0x2860 [ 28.936537] __do_softirq+0x1b7/0x7d4 [ 28.937101] [ 28.937343] Last potentially related work creation: [ 28.937935] kasan_save_stack+0x22/0x50 [ 28.938454] __kasan_record_aux_stack+0x8e/0xa0 [ 28.939032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.939707] remove_vma+0x139/0x170 [ 28.940155] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.940735] do_vmi_munmap+0x1f1/0x2b0 [ 28.941216] __vm_munmap+0x138/0x3a0 [ 28.941706] __x64_sys_munmap+0x59/0x80 [ 28.942201] do_syscall_64+0x3f/0x90 [ 28.942685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.943348] [ 28.943561] The buggy address belongs to the object at ffff88801a26f1d0 [ 28.943561] which belongs to the cache vm_area_struct of size 168 [ 28.945060] The buggy address is located 88 bytes inside of [ 28.945060] freed 168-byte region [ffff88801a26f1d0, ffff88801a26f278) [ 28.946491] [ 28.946706] The buggy address belongs to the physical page: [ 28.947377] page:0000000001a28b34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a26f [ 28.948547] memcg:ffff888018047d01 [ 28.949117] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.949971] page_type: 0xffffffff() [ 28.950559] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.951778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018047d01 [ 28.952974] page dumped because: kasan: bad access detected [ 28.953833] [ 28.954098] Memory state around the buggy address: [ 28.954692] ffff88801a26f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.955581] ffff88801a26f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.956486] >ffff88801a26f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.957356] ^ [ 28.957918] ffff88801a26f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.958793] ffff88801a26f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.959662] ================================================================== [ 28.960613] Disabling lock debugging due to kernel taint [ 31.702663] BUG: Bad rss-counter state mm:00000000afbff2f3 type:MM_FILEPAGES val:33 [ 31.703676] BUG: Bad rss-counter state mm:00000000afbff2f3 type:MM_ANONPAGES val:22 [ 32.209658] BUG: Bad rss-counter state mm:000000000c166697 type:MM_FILEPAGES val:33 [ 32.210663] BUG: Bad rss-counter state mm:000000000c166697 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25710' (ECDSA) to the list of known hosts. 2023/06/21 07:44:00 fuzzer started 2023/06/21 07:44:00 dialing manager at localhost:36067 2023/06/21 07:44:01 checking machine... 2023/06/21 07:44:01 checking revisions... [ 32.909096] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:44:01 testing simple program... [ 32.947321] cgroup: Unknown subsys name 'net' [ 33.005178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:44:00 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff85e05100 RCX=ffffffff8186c9a5 RDX=0000000000000004 RSI=ffffffff861437b2 RDI=ffffffff85e050e0 RBP=ffffffff85e050f8 RSP=ffff8880180ef748 R8 =ffffffff861437b2 R9 =ffff8880180ef840 R10=0000000000038001 R11=00000000000229c7 R12=ffffffff85e05108 R13=ffffffff85e050e0 R14=ffffffff85e050f4 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000212 [----A--] 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 00007fe619287900 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=00007fe61983c650 CR3=000000001ce7e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81f37a8a RDX=ffff88800e1a3680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800da3f840 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=63206e6f69737365 R12=ffff888008df8000 R13=ffff888008df80d8 R14=0000000000000000 R15=ffff888008df8000 RIP=ffffffff814c0864 RFL=00000246 [---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 00007f6c91bc5700 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=00007f8179b0d170 CR3=00000000182f6000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030303a3434 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000