syzkaller login: [ 39.388180] BUG: Bad rss-counter state mm:0000000090d9e1bf type:MM_FILEPAGES val:33 [ 39.388891] BUG: Bad rss-counter state mm:0000000090d9e1bf type:MM_ANONPAGES val:22 [ 39.615045] ================================================================== [ 39.615638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.616262] Read of size 8 at addr ffff8880094da228 by task sshd/220 [ 39.616742] [ 39.616881] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.617419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.618030] Call Trace: [ 39.618232] [ 39.618412] dump_stack_lvl+0x91/0xf0 [ 39.618725] print_report+0xcc/0x620 [ 39.619030] ? __virt_addr_valid+0x102/0x340 [ 39.619379] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.619765] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.628197] kasan_report+0xbe/0xf0 [ 39.628505] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.628891] vma_interval_tree_remove+0xc75/0xec0 [ 39.629267] vma_prepare+0xc54/0x11a0 [ 39.629567] __split_vma+0x5af/0x950 [ 39.629869] ? __pfx___split_vma+0x10/0x10 [ 39.630200] ? find_held_lock+0x2c/0x110 [ 39.630526] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.630877] ? lock_is_held_type+0x9f/0x120 [ 39.631213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.631588] ? mtree_range_walk+0x632/0x900 [ 39.631932] ? mas_walk+0x5c7/0x7c0 [ 39.632259] do_vmi_munmap+0x1f1/0x2b0 [ 39.632568] mmap_region+0x1f9/0x2660 [ 39.632868] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.633187] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.633627] ? __pfx_lock_acquire+0x10/0x10 [ 39.633956] ? __pfx_mmap_region+0x10/0x10 [ 39.634284] ? security_mmap_addr+0x7d/0xa0 [ 39.634615] ? get_unmapped_area+0x1f5/0x3f0 [ 39.634959] do_mmap+0x854/0xf00 [ 39.635238] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.635555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.635913] ksys_mmap_pgoff+0x3af/0x500 [ 39.636257] do_syscall_64+0x3f/0x90 [ 39.636564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.636977] RIP: 0033:0x7f05f2b49d82 [ 39.637268] 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 [ 39.638603] RSP: 002b:00007ffd5598d348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.639175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05f2b49d82 [ 39.639705] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05f1f83000 [ 39.640270] RBP: 00007f05f1f83000 R08: 0000000000000009 R09: 0000000000001000 [ 39.640810] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629a79abf60 [ 39.641350] R13: 00007ffd5598d360 R14: 00007ffd5598d390 R15: 00007ffd5598d6f0 [ 39.641897] [ 39.642089] [ 39.642229] Allocated by task 213: [ 39.642508] kasan_save_stack+0x22/0x50 [ 39.642835] kasan_set_track+0x25/0x30 [ 39.643151] __kasan_slab_alloc+0x59/0x70 [ 39.643488] kmem_cache_alloc+0x16b/0x370 [ 39.643818] vm_area_dup+0x20/0x160 [ 39.644142] __split_vma+0x170/0x950 [ 39.644441] split_vma+0xc6/0x110 [ 39.644717] mprotect_fixup+0x8d2/0xb30 [ 39.645032] do_mprotect_pkey+0x87e/0xd40 [ 39.645355] __x64_sys_mprotect+0x78/0xc0 [ 39.645678] do_syscall_64+0x3f/0x90 [ 39.645980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.646383] [ 39.646518] Freed by task 213: [ 39.646766] kasan_save_stack+0x22/0x50 [ 39.647082] kasan_set_track+0x25/0x30 [ 39.647391] kasan_save_free_info+0x2b/0x50 [ 39.647724] __kasan_slab_free+0x10a/0x190 [ 39.648057] kmem_cache_free+0x10d/0x4d0 [ 39.648411] rcu_core+0x8c8/0x2860 [ 39.648691] __do_softirq+0x1b7/0x7d4 [ 39.648996] [ 39.649132] Last potentially related work creation: [ 39.649496] kasan_save_stack+0x22/0x50 [ 39.649814] __kasan_record_aux_stack+0x8e/0xa0 [ 39.650174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.650577] remove_vma+0x139/0x170 [ 39.650865] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.651217] do_vmi_munmap+0x1f1/0x2b0 [ 39.651525] __vm_munmap+0x138/0x3a0 [ 39.651821] __x64_sys_munmap+0x59/0x80 [ 39.652166] do_syscall_64+0x3f/0x90 [ 39.652472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.652881] [ 39.653018] Second to last potentially related work creation: [ 39.653448] kasan_save_stack+0x22/0x50 [ 39.653768] __kasan_record_aux_stack+0x8e/0xa0 [ 39.654130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.654536] remove_vma+0x139/0x170 [ 39.654821] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.655174] do_vmi_munmap+0x1f1/0x2b0 [ 39.655481] mmap_region+0x1f9/0x2660 [ 39.655783] do_mmap+0x854/0xf00 [ 39.656057] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.656392] ksys_mmap_pgoff+0x7d/0x500 [ 39.656704] do_syscall_64+0x3f/0x90 [ 39.657005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.657411] [ 39.657548] The buggy address belongs to the object at ffff8880094da1d0 [ 39.657548] which belongs to the cache vm_area_struct of size 168 [ 39.658470] The buggy address is located 88 bytes inside of [ 39.658470] freed 168-byte region [ffff8880094da1d0, ffff8880094da278) [ 39.659356] [ 39.659494] The buggy address belongs to the physical page: [ 39.659911] page:000000001759e051 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94da [ 39.660625] memcg:ffff88800f2f3101 [ 39.660895] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.661302] page_type: 0xffffffff() [ 39.661589] raw: 0100000000000200 ffff88800879fc80 ffffea0000601fc0 dead000000000006 [ 39.662171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2f3101 [ 39.662740] page dumped because: kasan: bad access detected [ 39.663156] [ 39.663292] Memory state around the buggy address: [ 39.663660] ffff8880094da100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.664277] ffff8880094da180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.664820] >ffff8880094da200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.665358] ^ [ 39.665711] ffff8880094da280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.666253] ffff8880094da300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.666792] ================================================================== [ 39.667868] Disabling lock debugging due to kernel taint [ 42.355298] BUG: Bad rss-counter state mm:000000001d405937 type:MM_FILEPAGES val:33 [ 42.355970] BUG: Bad rss-counter state mm:000000001d405937 type:MM_ANONPAGES val:22 [ 43.430319] BUG: Bad rss-counter state mm:00000000c25f4fac type:MM_FILEPAGES val:33 [ 43.431014] BUG: Bad rss-counter state mm:00000000c25f4fac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61976' (ECDSA) to the list of known hosts. 2023/06/20 08:19:16 fuzzer started 2023/06/20 08:19:17 dialing manager at localhost:44161 2023/06/20 08:19:17 checking machine... 2023/06/20 08:19:17 checking revisions... 2023/06/20 08:19:17 testing simple program... [ 44.312218] kmemleak: Automatic memory scanning thread ended [ 44.365818] cgroup: Unknown subsys name 'net' [ 44.424748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:19:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015ab02a0 RCX=0000000000000000 RDX=ffff88800e4b0000 RSI=ffffffff8175d1d1 RDI=0000000000000006 RBP=ffff88800f0c0240 RSP=ffff8880102cfb30 R8 =0000000000000006 R9 =0000000016fce067 R10=0000000016fce067 R11=0000000000000000 R12=ffff888016fce068 R13=1ffff11002059f6b R14=dffffc0000000000 R15=00007f398900d000 RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3988eb7900 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=00007f398900d2c8 CR3=000000000c638000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=ffffed1001907101 RSI=0000000000000004 RDI=ffff88800c838800 RBP=ffff88800c838800 RSP=ffff88800a1377a8 R8 =0000000000000000 R9 =ffffed1001907100 R10=ffff88800c838803 R11=0000000000000000 R12=0000000000000003 R13=ffffed1001907100 R14=0000000000000001 R15=1ffff11001426ef6 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 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=00007fb70fcdf510 CR3=000000000967c000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=4609bf2f562c8b2d00000000001371b8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=5b5f74cdac87b14000000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000