syzkaller login: [ 30.461024] BUG: Bad rss-counter state mm:000000009f6fb061 type:MM_FILEPAGES val:33 [ 30.461774] BUG: Bad rss-counter state mm:000000009f6fb061 type:MM_ANONPAGES val:22 [ 30.585342] ================================================================== [ 30.586002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.586611] Read of size 8 at addr ffff888016c03c20 by task sshd/220 [ 30.587107] [ 30.587253] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.587815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.588446] Call Trace: [ 30.588650] [ 30.588830] dump_stack_lvl+0x91/0xf0 [ 30.589148] print_report+0xcc/0x620 [ 30.589455] ? __virt_addr_valid+0x102/0x340 [ 30.590144] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.590570] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.590977] kasan_report+0xbe/0xf0 [ 30.591309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591735] vma_interval_tree_remove+0xc75/0xec0 [ 30.592144] vma_prepare+0xc54/0x11a0 [ 30.592458] __split_vma+0x5af/0x950 [ 30.592763] ? __pfx___split_vma+0x10/0x10 [ 30.593116] ? find_held_lock+0x2c/0x110 [ 30.593454] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.593861] ? lock_is_held_type+0x9f/0x120 [ 30.594277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.594687] ? mtree_range_walk+0x632/0x900 [ 30.595060] ? mas_walk+0x5c7/0x7c0 [ 30.595364] do_vmi_munmap+0x1f1/0x2b0 [ 30.595672] mmap_region+0x1f9/0x2660 [ 30.595980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.596352] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.596809] ? __pfx_lock_acquire+0x10/0x10 [ 30.597158] ? __pfx_mmap_region+0x10/0x10 [ 30.597494] ? security_mmap_addr+0x7d/0xa0 [ 30.597900] ? get_unmapped_area+0x1f5/0x3f0 [ 30.598262] do_mmap+0x854/0xf00 [ 30.598567] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.598909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.599309] ksys_mmap_pgoff+0x3af/0x500 [ 30.599653] do_syscall_64+0x3f/0x90 [ 30.599980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.600461] RIP: 0033:0x7f9d01ee1d82 [ 30.600771] 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 [ 30.602239] RSP: 002b:00007ffd62890928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.602832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d01ee1d82 [ 30.603399] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d0131b000 [ 30.603995] RBP: 00007f9d0131b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.604560] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2af5bbf70 [ 30.605100] R13: 00007ffd62890940 R14: 00007ffd62890970 R15: 00007ffd62890cd0 [ 30.605742] [ 30.605946] [ 30.606107] Allocated by task 213: [ 30.606393] kasan_save_stack+0x22/0x50 [ 30.606743] kasan_set_track+0x25/0x30 [ 30.607071] __kasan_slab_alloc+0x59/0x70 [ 30.607458] kmem_cache_alloc+0x16b/0x370 [ 30.607809] vm_area_dup+0x20/0x160 [ 30.608111] __split_vma+0x170/0x950 [ 30.608409] split_vma+0xc6/0x110 [ 30.608701] mprotect_fixup+0x8d2/0xb30 [ 30.609040] do_mprotect_pkey+0x87e/0xd40 [ 30.609384] __x64_sys_mprotect+0x78/0xc0 [ 30.609795] do_syscall_64+0x3f/0x90 [ 30.610149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.610584] [ 30.610732] Freed by task 13: [ 30.610988] kasan_save_stack+0x22/0x50 [ 30.611349] kasan_set_track+0x25/0x30 [ 30.611717] kasan_save_free_info+0x2b/0x50 [ 30.612094] __kasan_slab_free+0x10a/0x190 [ 30.612452] kmem_cache_free+0x10d/0x4d0 [ 30.612799] rcu_core+0x8c8/0x2860 [ 30.613134] __do_softirq+0x1b7/0x7d4 [ 30.613460] [ 30.613641] Last potentially related work creation: [ 30.614029] kasan_save_stack+0x22/0x50 [ 30.614405] __kasan_record_aux_stack+0x8e/0xa0 [ 30.614791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.615229] remove_vma+0x139/0x170 [ 30.615529] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.615907] do_vmi_munmap+0x1f1/0x2b0 [ 30.616284] __vm_munmap+0x138/0x3a0 [ 30.616594] __x64_sys_munmap+0x59/0x80 [ 30.616922] do_syscall_64+0x3f/0x90 [ 30.617270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.617751] [ 30.617892] The buggy address belongs to the object at ffff888016c03bc8 [ 30.617892] which belongs to the cache vm_area_struct of size 168 [ 30.618925] The buggy address is located 88 bytes inside of [ 30.618925] freed 168-byte region [ffff888016c03bc8, ffff888016c03c70) [ 30.619890] [ 30.620035] The buggy address belongs to the physical page: [ 30.620490] page:00000000e18ba823 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c03 [ 30.621230] memcg:ffff88800d88ef01 [ 30.621517] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.621968] page_type: 0xffffffff() [ 30.622296] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.622922] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d88ef01 [ 30.623520] page dumped because: kasan: bad access detected [ 30.623970] [ 30.624133] Memory state around the buggy address: [ 30.624542] ffff888016c03b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.625109] ffff888016c03b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.625735] >ffff888016c03c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.626314] ^ [ 30.626676] ffff888016c03c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.627308] ffff888016c03d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.627886] ================================================================== [ 30.628760] Disabling lock debugging due to kernel taint [ 32.592447] BUG: Bad rss-counter state mm:0000000026dbc699 type:MM_FILEPAGES val:33 [ 32.593232] BUG: Bad rss-counter state mm:0000000026dbc699 type:MM_ANONPAGES val:22 [ 33.031283] BUG: Bad rss-counter state mm:00000000dd86ece0 type:MM_FILEPAGES val:33 [ 33.032039] BUG: Bad rss-counter state mm:00000000dd86ece0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29686' (ECDSA) to the list of known hosts. 2023/06/20 09:27:09 fuzzer started 2023/06/20 09:27:09 dialing manager at localhost:44161 2023/06/20 09:27:09 checking machine... 2023/06/20 09:27:09 checking revisions... [ 33.564427] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:27:09 testing simple program... [ 33.604847] cgroup: Unknown subsys name 'net' [ 33.653779] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:27:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffc2a2a78d8 CR3=0000000005482000 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=00007f80e05ff51000005625324b4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880102d9b40 RSI=ffffffff83c632c0 RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff88801021f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000083 R11=0000098900000989 R12=0000000000000000 R13=0000000000000083 R14=dffffc0000000000 R15=0000000000000001 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0290319900 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=00007f02908d0618 CR3=000000000dc20000 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=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