syzkaller login: [ 43.480887] BUG: Bad rss-counter state mm:00000000423ec7b5 type:MM_FILEPAGES val:33 [ 43.481927] BUG: Bad rss-counter state mm:00000000423ec7b5 type:MM_ANONPAGES val:22 [ 43.607653] ================================================================== [ 43.608346] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.609063] Read of size 8 at addr ffff88800da1b228 by task sshd/226 [ 43.609644] [ 43.609809] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.610463] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.611342] Call Trace: [ 43.611586] [ 43.611800] dump_stack_lvl+0x91/0xf0 [ 43.612171] print_report+0xcc/0x620 [ 43.612534] ? __virt_addr_valid+0x102/0x340 [ 43.612956] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.613439] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.613904] kasan_report+0xbe/0xf0 [ 43.614261] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.614727] vma_interval_tree_remove+0xc75/0xec0 [ 43.615189] vma_prepare+0xc54/0x11a0 [ 43.615550] __split_vma+0x5af/0x950 [ 43.615906] ? __pfx___split_vma+0x10/0x10 [ 43.616303] ? find_held_lock+0x2c/0x110 [ 43.616698] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.617128] ? lock_is_held_type+0x9f/0x120 [ 43.617540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.618001] ? mtree_range_walk+0x632/0x900 [ 43.618418] ? mas_walk+0x5c7/0x7c0 [ 43.618778] do_vmi_munmap+0x1f1/0x2b0 [ 43.619160] mmap_region+0x1f9/0x2660 [ 43.619531] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.619922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.620462] ? __pfx_lock_acquire+0x10/0x10 [ 43.620864] ? __pfx_mmap_region+0x10/0x10 [ 43.621268] ? security_mmap_addr+0x7d/0xa0 [ 43.621670] ? get_unmapped_area+0x1f5/0x3f0 [ 43.622088] do_mmap+0x854/0xf00 [ 43.622418] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.622797] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.623244] ksys_mmap_pgoff+0x3af/0x500 [ 43.623630] do_syscall_64+0x3f/0x90 [ 43.623991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.624481] RIP: 0033:0x7fbc015a7d82 [ 43.624829] 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 [ 43.626454] RSP: 002b:00007ffe91b545d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.627149] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc015a7d82 [ 43.627791] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc009e1000 [ 43.628429] RBP: 00007fbc009e1000 R08: 0000000000000009 R09: 0000000000001000 [ 43.629071] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639c6c17ec0 [ 43.629713] R13: 00007ffe91b545f0 R14: 00007ffe91b54620 R15: 00007ffe91b54980 [ 43.630368] [ 43.630590] [ 43.630751] Allocated by task 219: [ 43.631080] kasan_save_stack+0x22/0x50 [ 43.631479] kasan_set_track+0x25/0x30 [ 43.631857] __kasan_slab_alloc+0x59/0x70 [ 43.632259] kmem_cache_alloc+0x16b/0x370 [ 43.632653] vm_area_dup+0x20/0x160 [ 43.632999] __split_vma+0x170/0x950 [ 43.633353] split_vma+0xc6/0x110 [ 43.633686] mprotect_fixup+0x8d2/0xb30 [ 43.634067] do_mprotect_pkey+0x87e/0xd40 [ 43.634465] __x64_sys_mprotect+0x78/0xc0 [ 43.634865] do_syscall_64+0x3f/0x90 [ 43.635234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.635721] [ 43.635887] Freed by task 219: [ 43.636186] kasan_save_stack+0x22/0x50 [ 43.636567] kasan_set_track+0x25/0x30 [ 43.636942] kasan_save_free_info+0x2b/0x50 [ 43.637344] __kasan_slab_free+0x10a/0x190 [ 43.637748] kmem_cache_free+0x10d/0x4d0 [ 43.638138] rcu_core+0x8c8/0x2860 [ 43.638477] __do_softirq+0x1b7/0x7d4 [ 43.638839] [ 43.639001] Last potentially related work creation: [ 43.639455] kasan_save_stack+0x22/0x50 [ 43.639838] __kasan_record_aux_stack+0x8e/0xa0 [ 43.640275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.640767] remove_vma+0x139/0x170 [ 43.641114] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.641539] do_vmi_munmap+0x1f1/0x2b0 [ 43.641911] __vm_munmap+0x138/0x3a0 [ 43.642263] __x64_sys_munmap+0x59/0x80 [ 43.642645] do_syscall_64+0x3f/0x90 [ 43.643003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.643508] [ 43.643674] Second to last potentially related work creation: [ 43.644196] kasan_save_stack+0x22/0x50 [ 43.644578] __kasan_record_aux_stack+0x8e/0xa0 [ 43.645013] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.645500] remove_vma+0x139/0x170 [ 43.645842] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.646267] do_vmi_munmap+0x1f1/0x2b0 [ 43.646639] mmap_region+0x1f9/0x2660 [ 43.647002] do_mmap+0x854/0xf00 [ 43.647335] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.647705] ksys_mmap_pgoff+0x3af/0x500 [ 43.648088] do_syscall_64+0x3f/0x90 [ 43.648449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.648935] [ 43.649099] The buggy address belongs to the object at ffff88800da1b1d0 [ 43.649099] which belongs to the cache vm_area_struct of size 168 [ 43.650218] The buggy address is located 88 bytes inside of [ 43.650218] freed 168-byte region [ffff88800da1b1d0, ffff88800da1b278) [ 43.651291] [ 43.651456] The buggy address belongs to the physical page: [ 43.651954] page:00000000c55e6fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda1b [ 43.652774] memcg:ffff88800d8b9701 [ 43.653096] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.653586] page_type: 0xffffffff() [ 43.653928] raw: 0100000000000200 ffff88800879fc80 ffffea000058e640 dead000000000006 [ 43.654626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8b9701 [ 43.655324] page dumped because: kasan: bad access detected [ 43.655819] [ 43.655983] Memory state around the buggy address: [ 43.656426] ffff88800da1b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.657079] ffff88800da1b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 43.657738] >ffff88800da1b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.658387] ^ [ 43.658813] ffff88800da1b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 43.659483] ffff88800da1b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 43.660133] ================================================================== [ 43.660881] Disabling lock debugging due to kernel taint [ 45.666968] BUG: Bad rss-counter state mm:00000000eca1b817 type:MM_FILEPAGES val:33 [ 45.668145] BUG: Bad rss-counter state mm:00000000eca1b817 type:MM_ANONPAGES val:22 [ 46.141076] BUG: Bad rss-counter state mm:000000006f035699 type:MM_FILEPAGES val:33 [ 46.142057] BUG: Bad rss-counter state mm:000000006f035699 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56939' (ECDSA) to the list of known hosts. 2023/06/19 17:44:27 fuzzer started 2023/06/19 17:44:27 dialing manager at localhost:44161 2023/06/19 17:44:28 checking machine... 2023/06/19 17:44:28 checking revisions... [ 46.875782] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:44:28 testing simple program... [ 46.914914] cgroup: Unknown subsys name 'net' [ 46.959548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:44:22 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888009a645f0 RCX=ffffffff83ab403d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f94e40 RBP=000000003726625d RSP=ffff88801802f508 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=00000d8d00000d8d R12=0000000000000000 R13=00000000000000be R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff83ab406d 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 00007fd5f9ac6900 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=00007fd5fa07d618 CR3=00000000098f6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11003001ed0 RSI=ffff88801800ff10 RDI=ffff88801800f680 RBP=ffff88801800ff48 RSP=ffff88801800f5c0 R8 =0000000000000001 R9 =ffff88801800f670 R10=0000000000038001 R11=0000000000022733 R12=ffff88801800f690 R13=ffff88801800f678 R14=ffff88801800ff10 R15=ffff88801800f630 RIP=ffffffff81131252 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 00007f6ff22ba700 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=00007ffa87eb06d0 CR3=000000000e5de000 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=2037323a34343a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34343a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000