syzkaller login: [ 30.499702] BUG: Bad rss-counter state mm:0000000061b930ba type:MM_FILEPAGES val:33 [ 30.500439] BUG: Bad rss-counter state mm:0000000061b930ba type:MM_ANONPAGES val:22 [ 30.532883] ================================================================== [ 30.533592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.534270] Read of size 8 at addr ffff888017f0a5c8 by task sshd/219 [ 30.534784] [ 30.534932] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.535833] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.536488] Call Trace: [ 30.536705] [ 30.536890] dump_stack_lvl+0x91/0xf0 [ 30.537235] print_report+0xcc/0x620 [ 30.537555] ? __virt_addr_valid+0x102/0x340 [ 30.537923] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.538335] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.538740] kasan_report+0xbe/0xf0 [ 30.539059] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539481] vma_interval_tree_remove+0xc75/0xec0 [ 30.539875] vma_prepare+0xc54/0x11a0 [ 30.540190] __split_vma+0x5af/0x950 [ 30.540508] ? __pfx___split_vma+0x10/0x10 [ 30.540846] ? find_held_lock+0x2c/0x110 [ 30.541208] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.541567] ? lock_is_held_type+0x9f/0x120 [ 30.541908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.542270] ? mtree_range_walk+0x632/0x900 [ 30.542603] ? mas_walk+0x5c7/0x7c0 [ 30.542890] do_vmi_munmap+0x1f1/0x2b0 [ 30.543197] mmap_region+0x1f9/0x2660 [ 30.543507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.543839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.544305] ? __pfx_lock_acquire+0x10/0x10 [ 30.544654] ? __pfx_mmap_region+0x10/0x10 [ 30.545053] ? security_mmap_addr+0x7d/0xa0 [ 30.545386] ? get_unmapped_area+0x1f5/0x3f0 [ 30.545721] do_mmap+0x854/0xf00 [ 30.546041] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.546372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.546736] ksys_mmap_pgoff+0x3af/0x500 [ 30.547099] do_syscall_64+0x3f/0x90 [ 30.547409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.547795] RIP: 0033:0x7f877ed9ad82 [ 30.548067] 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 [ 30.549418] RSP: 002b:00007ffc35d7e028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.549966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f877ed9ad82 [ 30.550571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f877e1d4000 [ 30.551096] RBP: 00007f877e1d4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.551622] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645337eeec0 [ 30.552204] R13: 00007ffc35d7e040 R14: 00007ffc35d7e070 R15: 00007ffc35d7e3d0 [ 30.552815] [ 30.553066] [ 30.553231] Allocated by task 212: [ 30.553537] kasan_save_stack+0x22/0x50 [ 30.553870] kasan_set_track+0x25/0x30 [ 30.554182] __kasan_slab_alloc+0x59/0x70 [ 30.554515] kmem_cache_alloc+0x16b/0x370 [ 30.554839] vm_area_dup+0x20/0x160 [ 30.555228] __split_vma+0x170/0x950 [ 30.555625] split_vma+0xc6/0x110 [ 30.555980] mprotect_fixup+0x8d2/0xb30 [ 30.556304] do_mprotect_pkey+0x87e/0xd40 [ 30.556648] __x64_sys_mprotect+0x78/0xc0 [ 30.557009] do_syscall_64+0x3f/0x90 [ 30.557332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.557746] [ 30.557888] Freed by task 212: [ 30.558137] kasan_save_stack+0x22/0x50 [ 30.558504] kasan_set_track+0x25/0x30 [ 30.558861] kasan_save_free_info+0x2b/0x50 [ 30.559227] __kasan_slab_free+0x10a/0x190 [ 30.559559] kmem_cache_free+0x10d/0x4d0 [ 30.559879] rcu_core+0x8c8/0x2860 [ 30.560175] __do_softirq+0x1b7/0x7d4 [ 30.560486] [ 30.560632] Last potentially related work creation: [ 30.561098] kasan_save_stack+0x22/0x50 [ 30.561438] __kasan_record_aux_stack+0x8e/0xa0 [ 30.561819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.562228] remove_vma+0x139/0x170 [ 30.562519] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.562872] do_vmi_munmap+0x1f1/0x2b0 [ 30.563199] __vm_munmap+0x138/0x3a0 [ 30.563504] __x64_sys_munmap+0x59/0x80 [ 30.563827] do_syscall_64+0x3f/0x90 [ 30.564151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.564614] [ 30.564749] The buggy address belongs to the object at ffff888017f0a570 [ 30.564749] which belongs to the cache vm_area_struct of size 168 [ 30.565837] The buggy address is located 88 bytes inside of [ 30.565837] freed 168-byte region [ffff888017f0a570, ffff888017f0a618) [ 30.566760] [ 30.566911] The buggy address belongs to the physical page: [ 30.567356] page:00000000f51cc123 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f0a [ 30.568051] memcg:ffff88801a4aa201 [ 30.568371] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.568831] page_type: 0xffffffff() [ 30.569151] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.569759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a4aa201 [ 30.570344] page dumped because: kasan: bad access detected [ 30.570774] [ 30.570920] Memory state around the buggy address: [ 30.571362] ffff888017f0a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.571907] ffff888017f0a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.572460] >ffff888017f0a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.573055] ^ [ 30.573646] ffff888017f0a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.574219] ffff888017f0a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.574769] ================================================================== [ 30.575580] Disabling lock debugging due to kernel taint [ 32.016414] BUG: Bad rss-counter state mm:00000000a6fc7261 type:MM_FILEPAGES val:33 [ 32.017308] BUG: Bad rss-counter state mm:00000000a6fc7261 type:MM_ANONPAGES val:22 [ 32.442296] BUG: Bad rss-counter state mm:00000000202c5966 type:MM_FILEPAGES val:33 [ 32.443056] BUG: Bad rss-counter state mm:00000000202c5966 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1084' (ECDSA) to the list of known hosts. 2023/06/21 08:32:43 fuzzer started 2023/06/21 08:32:43 dialing manager at localhost:36067 2023/06/21 08:32:44 checking machine... 2023/06/21 08:32:44 checking revisions... [ 32.937822] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:32:44 testing simple program... [ 32.977261] cgroup: Unknown subsys name 'net' [ 33.032370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:43 Registers: info registers vcpu 0 RAX=ffffffff8180c6a2 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff11002f9ae9d RSI=ffffffff8180c6a2 RDI=ffff888017cd7558 RBP=ffff888017cd7528 RSP=ffff888017cd7488 R8 =ffffffff860d825a R9 =ffff888017cd74d0 R10=0000000000038001 R11=0000000000010b8d R12=ffff888017cd7558 R13=0000000000000000 R14=ffff8880159a3680 R15=0000000000000000 RIP=ffffffff813ad474 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 00007fe3fe87d700 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=00005570718217e4 CR3=0000000016784000 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=2033343a32333a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a32333a3830203132 XMM08=69767265733d7373616c63742030733a 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=00007fffb7c9b2c8 CR3=0000000016784000 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=32333a3830203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033343a3233 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323431 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000