syzkaller login: [ 33.590771] BUG: Bad rss-counter state mm:0000000047d697a0 type:MM_FILEPAGES val:33 [ 33.591876] BUG: Bad rss-counter state mm:0000000047d697a0 type:MM_ANONPAGES val:22 [ 33.769889] ================================================================== [ 33.770797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.771735] Read of size 8 at addr ffff88800e0bd310 by task sshd/220 [ 33.772744] [ 33.772977] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.773888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.774995] Call Trace: [ 33.775336] [ 33.775641] dump_stack_lvl+0x91/0xf0 [ 33.776167] print_report+0xcc/0x620 [ 33.776686] ? __virt_addr_valid+0x102/0x340 [ 33.777280] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.777949] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.778610] kasan_report+0xbe/0xf0 [ 33.779121] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.779780] vma_interval_tree_remove+0xc75/0xec0 [ 33.780421] vma_prepare+0xc54/0x11a0 [ 33.780929] __split_vma+0x5af/0x950 [ 33.781431] ? __pfx___split_vma+0x10/0x10 [ 33.782017] ? find_held_lock+0x2c/0x110 [ 33.782562] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.783162] ? lock_is_held_type+0x9f/0x120 [ 33.783731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.784370] ? mtree_range_walk+0x632/0x900 [ 33.785042] ? mas_walk+0x5c7/0x7c0 [ 33.785543] do_vmi_munmap+0x1f1/0x2b0 [ 33.786074] mmap_region+0x1f9/0x2660 [ 33.786583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.787120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.787877] ? __pfx_lock_acquire+0x10/0x10 [ 33.788469] ? __pfx_mmap_region+0x10/0x10 [ 33.789041] ? security_mmap_addr+0x7d/0xa0 [ 33.789608] ? get_unmapped_area+0x1f5/0x3f0 [ 33.790208] do_mmap+0x854/0xf00 [ 33.790677] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.791227] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.791824] ksys_mmap_pgoff+0x3af/0x500 [ 33.792360] do_syscall_64+0x3f/0x90 [ 33.792869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.793544] RIP: 0033:0x7f635e5c8d82 [ 33.794048] 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 [ 33.796291] RSP: 002b:00007fff02049728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.797268] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f635e5c8d82 [ 33.798177] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f635da02000 [ 33.799075] RBP: 00007f635da02000 R08: 0000000000000009 R09: 0000000000001000 [ 33.800002] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc707d9ec0 [ 33.800914] R13: 00007fff02049740 R14: 00007fff02049770 R15: 00007fff02049ad0 [ 33.801827] [ 33.802176] [ 33.802407] Allocated by task 213: [ 33.802866] kasan_save_stack+0x22/0x50 [ 33.803402] kasan_set_track+0x25/0x30 [ 33.803928] __kasan_slab_alloc+0x59/0x70 [ 33.804488] kmem_cache_alloc+0x16b/0x370 [ 33.805039] vm_area_dup+0x20/0x160 [ 33.805517] __split_vma+0x170/0x950 [ 33.806020] split_vma+0xc6/0x110 [ 33.806492] mprotect_fixup+0x8d2/0xb30 [ 33.807026] do_mprotect_pkey+0x87e/0xd40 [ 33.807570] __x64_sys_mprotect+0x78/0xc0 [ 33.808135] do_syscall_64+0x3f/0x90 [ 33.808637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.809316] [ 33.809545] Freed by task 213: [ 33.809977] kasan_save_stack+0x22/0x50 [ 33.810506] kasan_set_track+0x25/0x30 [ 33.811037] kasan_save_free_info+0x2b/0x50 [ 33.811614] __kasan_slab_free+0x10a/0x190 [ 33.812203] kmem_cache_free+0x10d/0x4d0 [ 33.812741] rcu_core+0x8c8/0x2860 [ 33.813208] __do_softirq+0x1b7/0x7d4 [ 33.813709] [ 33.813950] Last potentially related work creation: [ 33.814584] kasan_save_stack+0x22/0x50 [ 33.815109] __kasan_record_aux_stack+0x8e/0xa0 [ 33.815722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.816394] remove_vma+0x139/0x170 [ 33.816889] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.817489] do_vmi_munmap+0x1f1/0x2b0 [ 33.818014] __vm_munmap+0x138/0x3a0 [ 33.818507] __x64_sys_munmap+0x59/0x80 [ 33.819039] do_syscall_64+0x3f/0x90 [ 33.819676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.820479] [ 33.820743] The buggy address belongs to the object at ffff88800e0bd2b8 [ 33.820743] which belongs to the cache vm_area_struct of size 168 [ 33.822556] The buggy address is located 88 bytes inside of [ 33.822556] freed 168-byte region [ffff88800e0bd2b8, ffff88800e0bd360) [ 33.824276] [ 33.824539] The buggy address belongs to the physical page: [ 33.825353] page:000000004cd16739 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0bd [ 33.826702] memcg:ffff88800cd89801 [ 33.827225] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.828103] page_type: 0xffffffff() [ 33.828658] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.829789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd89801 [ 33.830825] page dumped because: kasan: bad access detected [ 33.831529] [ 33.831766] Memory state around the buggy address: [ 33.832400] ffff88800e0bd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.833324] ffff88800e0bd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.834238] >ffff88800e0bd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.835299] ^ [ 33.835859] ffff88800e0bd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.836856] ffff88800e0bd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.837781] ================================================================== [ 33.839010] Disabling lock debugging due to kernel taint [ 36.465512] BUG: Bad rss-counter state mm:0000000093519f1f type:MM_FILEPAGES val:33 [ 36.466907] BUG: Bad rss-counter state mm:0000000093519f1f type:MM_ANONPAGES val:22 [ 36.953865] BUG: Bad rss-counter state mm:000000007d02c004 type:MM_FILEPAGES val:33 [ 36.954967] BUG: Bad rss-counter state mm:000000007d02c004 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61218' (ECDSA) to the list of known hosts. 2023/06/20 10:04:26 fuzzer started 2023/06/20 10:04:26 dialing manager at localhost:44161 2023/06/20 10:04:26 checking machine... 2023/06/20 10:04:26 checking revisions... [ 37.680881] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:04:26 testing simple program... [ 37.736631] cgroup: Unknown subsys name 'net' [ 37.778279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:04:23 Registers: info registers vcpu 0 RAX=1ffff11003353cd1 RBX=ffff888019a9e658 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019a9e688 RBP=ffff888018a79488 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888018ab6f40 R14=ffffffff818d9dc6 R15=ffff88800dce4480 RIP=ffffffff8184636c RFL=00000046 [---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 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=00007fcacbfabc40 CR3=000000000e2aa000 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=2035323a34303a3031203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a34303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000100007f RBX=000000000000004c RCX=0000000000000008 RDX=00007ffd5c91eb40 RSI=00007ffd5c91eb58 RDI=0000000000000001 RBP=00007ffd5c91fc80 RSP=00007ffd5c91eb40 R8 =0000000000000000 R9 =0000000000000002 R10=00007ffd5c91eb5c R11=0000000000000246 R12=00000000000000a4 R13=00007ffd5c91fbf0 R14=0000000000000009 R15=00000000000000e5 RIP=00007fe31b43663f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe31af28900 00000000 00000000 GS =0000 0000000000000000 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=00007fe31b4df618 CR3=000000001a324000 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