syzkaller login: [ 31.797345] BUG: Bad rss-counter state mm:0000000095fff877 type:MM_FILEPAGES val:33 [ 31.798589] BUG: Bad rss-counter state mm:0000000095fff877 type:MM_ANONPAGES val:22 [ 31.836114] ================================================================== [ 31.837097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.838019] Read of size 8 at addr ffff88800ef11b38 by task sshd/220 [ 31.838787] [ 31.839003] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.839970] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.840933] Call Trace: [ 31.841250] [ 31.841529] dump_stack_lvl+0x91/0xf0 [ 31.842030] print_report+0xcc/0x620 [ 31.842528] ? __virt_addr_valid+0x102/0x340 [ 31.843090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.843702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.844322] kasan_report+0xbe/0xf0 [ 31.844799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.845408] vma_interval_tree_remove+0xc75/0xec0 [ 31.846005] vma_prepare+0xc54/0x11a0 [ 31.846502] __split_vma+0x5af/0x950 [ 31.846973] ? __pfx___split_vma+0x10/0x10 [ 31.847492] ? find_held_lock+0x2c/0x110 [ 31.848004] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.848571] ? lock_is_held_type+0x9f/0x120 [ 31.849103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.849698] ? mtree_range_walk+0x632/0x900 [ 31.850253] ? mas_walk+0x5c7/0x7c0 [ 31.850723] do_vmi_munmap+0x1f1/0x2b0 [ 31.851210] mmap_region+0x1f9/0x2660 [ 31.851683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.852195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.852904] ? __pfx_lock_acquire+0x10/0x10 [ 31.853430] ? __pfx_mmap_region+0x10/0x10 [ 31.853952] ? security_mmap_addr+0x7d/0xa0 [ 31.854508] ? get_unmapped_area+0x1f5/0x3f0 [ 31.855051] do_mmap+0x854/0xf00 [ 31.855492] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.855982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.856547] ksys_mmap_pgoff+0x3af/0x500 [ 31.857056] do_syscall_64+0x3f/0x90 [ 31.857536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.858198] RIP: 0033:0x7f519f7e9d82 [ 31.858648] 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 [ 31.860740] RSP: 002b:00007ffdd95717a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.861640] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f519f7e9d82 [ 31.862481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f519ec23000 [ 31.863320] RBP: 00007f519ec23000 R08: 0000000000000009 R09: 0000000000001000 [ 31.864156] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5ceb8aec0 [ 31.864999] R13: 00007ffdd95717c0 R14: 00007ffdd95717f0 R15: 00007ffdd9571b50 [ 31.865844] [ 31.866130] [ 31.866351] Allocated by task 213: [ 31.866774] kasan_save_stack+0x22/0x50 [ 31.867279] kasan_set_track+0x25/0x30 [ 31.867774] __kasan_slab_alloc+0x59/0x70 [ 31.868301] kmem_cache_alloc+0x16b/0x370 [ 31.868816] vm_area_dup+0x20/0x160 [ 31.869264] __split_vma+0x170/0x950 [ 31.869726] split_vma+0xc6/0x110 [ 31.870162] mprotect_fixup+0x8d2/0xb30 [ 31.870679] do_mprotect_pkey+0x87e/0xd40 [ 31.871199] __x64_sys_mprotect+0x78/0xc0 [ 31.871725] do_syscall_64+0x3f/0x90 [ 31.872191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.872824] [ 31.873039] Freed by task 213: [ 31.873423] kasan_save_stack+0x22/0x50 [ 31.873920] kasan_set_track+0x25/0x30 [ 31.874413] kasan_save_free_info+0x2b/0x50 [ 31.874939] __kasan_slab_free+0x10a/0x190 [ 31.875475] kmem_cache_free+0x10d/0x4d0 [ 31.875978] rcu_core+0x8c8/0x2860 [ 31.876414] __do_softirq+0x1b7/0x7d4 [ 31.876888] [ 31.877100] Last potentially related work creation: [ 31.877676] kasan_save_stack+0x22/0x50 [ 31.878175] __kasan_record_aux_stack+0x8e/0xa0 [ 31.878746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.879385] remove_vma+0x139/0x170 [ 31.879835] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.880444] do_vmi_munmap+0x1f1/0x2b0 [ 31.880920] __vm_munmap+0x138/0x3a0 [ 31.881384] __x64_sys_munmap+0x59/0x80 [ 31.881877] do_syscall_64+0x3f/0x90 [ 31.882366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.882997] [ 31.883207] The buggy address belongs to the object at ffff88800ef11ae0 [ 31.883207] which belongs to the cache vm_area_struct of size 168 [ 31.884650] The buggy address is located 88 bytes inside of [ 31.884650] freed 168-byte region [ffff88800ef11ae0, ffff88800ef11b88) [ 31.886025] [ 31.886253] The buggy address belongs to the physical page: [ 31.886915] page:00000000598d6088 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef11 [ 31.887978] memcg:ffff88800d35cf01 [ 31.888402] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.889039] page_type: 0xffffffff() [ 31.889499] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.890418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d35cf01 [ 31.891314] page dumped because: kasan: bad access detected [ 31.891965] [ 31.892176] Memory state around the buggy address: [ 31.892748] ffff88800ef11a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.893591] ffff88800ef11a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.894442] >ffff88800ef11b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.895283] ^ [ 31.895888] ffff88800ef11b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.896734] ffff88800ef11c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.897566] ================================================================== [ 31.898584] Disabling lock debugging due to kernel taint [ 34.072775] BUG: Bad rss-counter state mm:0000000050fed1e5 type:MM_FILEPAGES val:33 [ 34.073769] BUG: Bad rss-counter state mm:0000000050fed1e5 type:MM_ANONPAGES val:22 [ 34.538096] BUG: Bad rss-counter state mm:0000000001c06001 type:MM_FILEPAGES val:33 [ 34.539202] BUG: Bad rss-counter state mm:0000000001c06001 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5235' (ECDSA) to the list of known hosts. 2023/06/20 20:45:49 fuzzer started 2023/06/20 20:45:50 dialing manager at localhost:36067 2023/06/20 20:45:50 checking machine... 2023/06/20 20:45:50 checking revisions... [ 35.263239] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:45:50 testing simple program... [ 35.317142] cgroup: Unknown subsys name 'net' [ 35.356787] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:45:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860ae4d2 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d9f9b0 RSP=ffff888008d9f8e8 R8 =ffffffff860ae4d6 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9f9b8 R13=ffff888008d9f9a0 R14=ffff888008d9ff20 R15=ffff888008d9f958 RIP=ffffffff81130bb0 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 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=00007f11f96f40b0 CR3=0000000018e64000 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=35343a3032203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363837 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007ffc8e2e5f30 RCX=0000000000000000 RDX=ffff88800e14d1c0 RSI=ffffffff82157258 RDI=0000000000000005 RBP=ffff888015c4fd18 RSP=ffff888015c4fae0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000001000 R15=dffffc0000000000 RIP=ffffffff814c089b RFL=00040246 [---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 00007f11f913c900 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=00007f11f96f3618 CR3=000000000fea6000 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