syzkaller login: [ 38.739995] BUG: Bad rss-counter state mm:00000000b0bf4c09 type:MM_FILEPAGES val:33 [ 38.741214] BUG: Bad rss-counter state mm:00000000b0bf4c09 type:MM_ANONPAGES val:22 [ 38.908509] ================================================================== [ 38.909449] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.910397] Read of size 8 at addr ffff88800beb0d08 by task sshd/220 [ 38.911359] [ 38.911585] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.912447] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.913464] Call Trace: [ 38.913787] [ 38.914075] dump_stack_lvl+0x91/0xf0 [ 38.914568] print_report+0xcc/0x620 [ 38.915072] ? __virt_addr_valid+0x102/0x340 [ 38.915670] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916286] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916899] kasan_report+0xbe/0xf0 [ 38.917388] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918011] vma_interval_tree_remove+0xc75/0xec0 [ 38.918613] vma_prepare+0xc54/0x11a0 [ 38.919092] __split_vma+0x5af/0x950 [ 38.919569] ? __pfx___split_vma+0x10/0x10 [ 38.920104] ? find_held_lock+0x2c/0x110 [ 38.920627] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.921197] ? lock_is_held_type+0x9f/0x120 [ 38.921733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.922335] ? mtree_range_walk+0x632/0x900 [ 38.922885] ? mas_walk+0x5c7/0x7c0 [ 38.923368] do_vmi_munmap+0x1f1/0x2b0 [ 38.923866] mmap_region+0x1f9/0x2660 [ 38.924353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.924856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.925567] ? __pfx_lock_acquire+0x10/0x10 [ 38.926102] ? __pfx_mmap_region+0x10/0x10 [ 38.926637] ? security_mmap_addr+0x7d/0xa0 [ 38.927163] ? get_unmapped_area+0x1f5/0x3f0 [ 38.927728] do_mmap+0x854/0xf00 [ 38.928172] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.928665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.929231] ksys_mmap_pgoff+0x3af/0x500 [ 38.929734] do_syscall_64+0x3f/0x90 [ 38.930215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930862] RIP: 0033:0x7f0bedb97d82 [ 38.931314] 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 [ 38.933435] RSP: 002b:00007ffc8f6978e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934340] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bedb97d82 [ 38.935182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0becfd1000 [ 38.936029] RBP: 00007f0becfd1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.936878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055841740cec0 [ 38.937717] R13: 00007ffc8f697900 R14: 00007ffc8f697930 R15: 00007ffc8f697c90 [ 38.938572] [ 38.938865] [ 38.939083] Allocated by task 213: [ 38.939534] kasan_save_stack+0x22/0x50 [ 38.940041] kasan_set_track+0x25/0x30 [ 38.940535] __kasan_slab_alloc+0x59/0x70 [ 38.941056] kmem_cache_alloc+0x16b/0x370 [ 38.941569] vm_area_dup+0x20/0x160 [ 38.942020] __split_vma+0x170/0x950 [ 38.942488] split_vma+0xc6/0x110 [ 38.942929] mprotect_fixup+0x8d2/0xb30 [ 38.943428] do_mprotect_pkey+0x87e/0xd40 [ 38.943966] __x64_sys_mprotect+0x78/0xc0 [ 38.944483] do_syscall_64+0x3f/0x90 [ 38.944958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945598] [ 38.945811] Freed by task 213: [ 38.946205] kasan_save_stack+0x22/0x50 [ 38.946714] kasan_set_track+0x25/0x30 [ 38.947211] kasan_save_free_info+0x2b/0x50 [ 38.947752] __kasan_slab_free+0x10a/0x190 [ 38.948284] kmem_cache_free+0x10d/0x4d0 [ 38.948798] rcu_core+0x8c8/0x2860 [ 38.949242] __do_softirq+0x1b7/0x7d4 [ 38.949718] [ 38.949932] Last potentially related work creation: [ 38.950520] kasan_save_stack+0x22/0x50 [ 38.951021] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952292] remove_vma+0x139/0x170 [ 38.952742] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953305] do_vmi_munmap+0x1f1/0x2b0 [ 38.953787] __vm_munmap+0x138/0x3a0 [ 38.954253] __x64_sys_munmap+0x59/0x80 [ 38.954745] do_syscall_64+0x3f/0x90 [ 38.955219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955887] [ 38.956101] The buggy address belongs to the object at ffff88800beb0cb0 [ 38.956101] which belongs to the cache vm_area_struct of size 168 [ 38.957570] The buggy address is located 88 bytes inside of [ 38.957570] freed 168-byte region [ffff88800beb0cb0, ffff88800beb0d58) [ 38.958975] [ 38.959190] The buggy address belongs to the physical page: [ 38.959864] page:000000003a2d539d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbeb0 [ 38.960952] memcg:ffff88800e595201 [ 38.961382] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962085] page_type: 0xffffffff() [ 38.962532] raw: 0100000000000200 ffff8880087a0c80 ffffea00002fc480 dead000000000007 [ 38.963451] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e595201 [ 38.964367] page dumped because: kasan: bad access detected [ 38.965021] [ 38.965235] Memory state around the buggy address: [ 38.965821] ffff88800beb0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.966676] ffff88800beb0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.967553] >ffff88800beb0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.968406] ^ [ 38.968842] ffff88800beb0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.969746] ffff88800beb0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.970626] ================================================================== [ 38.971544] Disabling lock debugging due to kernel taint [ 41.843907] BUG: Bad rss-counter state mm:000000008ff6aa85 type:MM_FILEPAGES val:33 [ 41.845569] BUG: Bad rss-counter state mm:000000008ff6aa85 type:MM_ANONPAGES val:22 [ 42.333897] BUG: Bad rss-counter state mm:00000000ff96884c type:MM_FILEPAGES val:33 [ 42.335123] BUG: Bad rss-counter state mm:00000000ff96884c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36490' (ECDSA) to the list of known hosts. 2023/06/21 02:49:04 fuzzer started 2023/06/21 02:49:04 dialing manager at localhost:36067 2023/06/21 02:49:04 checking machine... 2023/06/21 02:49:04 checking revisions... [ 43.044542] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:49:05 testing simple program... [ 43.097250] cgroup: Unknown subsys name 'net' [ 43.134219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:04 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000004b RCX=ffffffff83723c94 RDX=ffff8880101fd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=000000000000004c RSP=ffff888019ebf7b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99d38 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c086b 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 00007f52f2fad900 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=00007f52f3564618 CR3=000000000c87e000 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=ffff88806cf09a78 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffff88806cf09f50 RDI=ffffffff84537da7 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a60 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800f7f7600 RIP=ffffffff811303b2 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 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=00007f11665c06c0 CR3=0000000018192000 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=2034303a39343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a39343a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000