syzkaller login: [ 31.615619] BUG: Bad rss-counter state mm:0000000062876897 type:MM_FILEPAGES val:33 [ 31.617039] BUG: Bad rss-counter state mm:0000000062876897 type:MM_ANONPAGES val:22 [ 31.755063] ================================================================== [ 31.756125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.757101] Read of size 8 at addr ffff88801804d228 by task sshd/222 [ 31.757960] [ 31.758190] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.759096] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.760128] Call Trace: [ 31.760462] [ 31.760759] dump_stack_lvl+0x91/0xf0 [ 31.761276] print_report+0xcc/0x620 [ 31.761773] ? __virt_addr_valid+0x102/0x340 [ 31.762354] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.762997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.763641] kasan_report+0xbe/0xf0 [ 31.764133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.764772] vma_interval_tree_remove+0xc75/0xec0 [ 31.765406] vma_prepare+0xc54/0x11a0 [ 31.765907] __split_vma+0x5af/0x950 [ 31.766390] ? __pfx___split_vma+0x10/0x10 [ 31.766941] ? find_held_lock+0x2c/0x110 [ 31.767510] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.768099] ? lock_is_held_type+0x9f/0x120 [ 31.768673] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.769312] ? mtree_range_walk+0x632/0x900 [ 31.769889] ? mas_walk+0x5c7/0x7c0 [ 31.770384] do_vmi_munmap+0x1f1/0x2b0 [ 31.770904] mmap_region+0x1f9/0x2660 [ 31.771418] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.771957] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.772697] ? __pfx_lock_acquire+0x10/0x10 [ 31.773256] ? __pfx_mmap_region+0x10/0x10 [ 31.773801] ? security_mmap_addr+0x7d/0xa0 [ 31.774373] ? get_unmapped_area+0x1f5/0x3f0 [ 31.774947] do_mmap+0x854/0xf00 [ 31.775425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.775944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.776527] ksys_mmap_pgoff+0x3af/0x500 [ 31.777058] do_syscall_64+0x3f/0x90 [ 31.777550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778206] RIP: 0033:0x7f5cd76edd82 [ 31.778668] 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 [ 31.780880] RSP: 002b:00007ffcb92645e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.781830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5cd76edd82 [ 31.782708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5cd6b27000 [ 31.783598] RBP: 00007f5cd6b27000 R08: 0000000000000009 R09: 0000000000001000 [ 31.784472] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e42bf9df70 [ 31.785362] R13: 00007ffcb9264600 R14: 00007ffcb9264630 R15: 00007ffcb9264990 [ 31.786251] [ 31.786554] [ 31.786774] Allocated by task 215: [ 31.787221] kasan_save_stack+0x22/0x50 [ 31.787759] kasan_set_track+0x25/0x30 [ 31.788267] __kasan_slab_alloc+0x59/0x70 [ 31.788807] kmem_cache_alloc+0x16b/0x370 [ 31.789341] vm_area_dup+0x20/0x160 [ 31.789804] __split_vma+0x170/0x950 [ 31.790294] split_vma+0xc6/0x110 [ 31.790744] mprotect_fixup+0x8d2/0xb30 [ 31.791269] do_mprotect_pkey+0x87e/0xd40 [ 31.791829] __x64_sys_mprotect+0x78/0xc0 [ 31.792372] do_syscall_64+0x3f/0x90 [ 31.792863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.793529] [ 31.793749] Freed by task 19: [ 31.794159] kasan_save_stack+0x22/0x50 [ 31.794687] kasan_set_track+0x25/0x30 [ 31.795211] kasan_save_free_info+0x2b/0x50 [ 31.795783] __kasan_slab_free+0x10a/0x190 [ 31.796335] kmem_cache_free+0x10d/0x4d0 [ 31.796861] rcu_core+0x8c8/0x2860 [ 31.797321] __do_softirq+0x1b7/0x7d4 [ 31.797832] [ 31.798049] Last potentially related work creation: [ 31.798657] kasan_save_stack+0x22/0x50 [ 31.799175] __kasan_record_aux_stack+0x8e/0xa0 [ 31.799773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.800428] remove_vma+0x139/0x170 [ 31.800885] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.801459] do_vmi_munmap+0x1f1/0x2b0 [ 31.801960] __vm_munmap+0x138/0x3a0 [ 31.802443] __x64_sys_munmap+0x59/0x80 [ 31.802953] do_syscall_64+0x3f/0x90 [ 31.803458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.804133] [ 31.804349] The buggy address belongs to the object at ffff88801804d1d0 [ 31.804349] which belongs to the cache vm_area_struct of size 168 [ 31.805874] The buggy address is located 88 bytes inside of [ 31.805874] freed 168-byte region [ffff88801804d1d0, ffff88801804d278) [ 31.807368] [ 31.807590] The buggy address belongs to the physical page: [ 31.808272] page:00000000a83eab16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1804d [ 31.809392] memcg:ffff888015860c01 [ 31.809832] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.810504] page_type: 0xffffffff() [ 31.810975] raw: 0100000000000200 ffff8880087a0c80 ffffea000040d180 dead000000000006 [ 31.811939] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015860c01 [ 31.812879] page dumped because: kasan: bad access detected [ 31.813569] [ 31.813786] Memory state around the buggy address: [ 31.814391] ffff88801804d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.815281] ffff88801804d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.816198] >ffff88801804d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.817089] ^ [ 31.817673] ffff88801804d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.818577] ffff88801804d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.819475] ================================================================== [ 31.820474] Disabling lock debugging due to kernel taint [ 34.495872] BUG: Bad rss-counter state mm:000000007c1a362f type:MM_FILEPAGES val:33 [ 34.497035] BUG: Bad rss-counter state mm:000000007c1a362f type:MM_ANONPAGES val:22 [ 34.977849] BUG: Bad rss-counter state mm:00000000b87a5096 type:MM_FILEPAGES val:33 [ 34.978888] BUG: Bad rss-counter state mm:00000000b87a5096 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27767' (ECDSA) to the list of known hosts. 2023/06/20 11:05:07 fuzzer started 2023/06/20 11:05:08 dialing manager at localhost:36067 2023/06/20 11:05:08 checking machine... 2023/06/20 11:05:08 checking revisions... [ 35.715101] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:05:08 testing simple program... [ 35.771212] cgroup: Unknown subsys name 'net' [ 35.845859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880099e5400 RCX=0000000000000000 RDX=ffff88800fb00000 RSI=0000000000000000 RDI=ffff8880099e5400 RBP=0000000000000000 RSP=ffff8880146cfc88 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000008 R13=0000000000000001 R14=dffffc0000000000 R15=00000000ffffffea RIP=ffffffff845253f4 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 00007f94958b0900 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=00007f9494cbc260 CR3=00000000099fc000 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=36d019ac5c4560ae2f4a9445bc94be32 XMM02=eff9b2d0a8fce9cb000000000011c0e0 XMM03=2c67c8bc2e329bc3000000000011c208 XMM04=56714ab40b260b0a00000000000ae988 XMM05=014086c42d9d45770000000000133b68 XMM06=8b410bedf92b626f0000000000132908 XMM07=fb795ef6d65770560000000000122b60 XMM08=2c67c8bc2e329bc3000000000011c208 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb31d3 RBX=ffffffff85d98e98 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff860a1416 RDI=ffffffff85d98e78 RBP=ffffffff85d98e98 RSP=ffff88806cf099e0 R8 =ffffffff860a1416 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d98e9c R13=ffffffff85d98e78 R14=ffffffff85d98e94 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fbdb1dbc900 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=00007ffcd4572000 CR3=0000000019b66000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000