syzkaller login: [ 30.103388] BUG: Bad rss-counter state mm:000000000e0e67e4 type:MM_FILEPAGES val:33 [ 30.104563] BUG: Bad rss-counter state mm:000000000e0e67e4 type:MM_ANONPAGES val:22 [ 30.146068] ================================================================== [ 30.147023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.148132] Read of size 8 at addr ffff888016e6a4e0 by task sshd/220 [ 30.148903] [ 30.149123] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.150033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.151048] Call Trace: [ 30.151379] [ 30.151671] dump_stack_lvl+0x91/0xf0 [ 30.152176] print_report+0xcc/0x620 [ 30.152666] ? __virt_addr_valid+0x102/0x340 [ 30.153237] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.153873] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.154517] kasan_report+0xbe/0xf0 [ 30.155018] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.155669] vma_interval_tree_remove+0xc75/0xec0 [ 30.156297] vma_prepare+0xc54/0x11a0 [ 30.156805] __split_vma+0x5af/0x950 [ 30.157326] ? __pfx___split_vma+0x10/0x10 [ 30.157878] ? find_held_lock+0x2c/0x110 [ 30.158430] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.159023] ? lock_is_held_type+0x9f/0x120 [ 30.159593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.160228] ? mtree_range_walk+0x632/0x900 [ 30.160807] ? mas_walk+0x5c7/0x7c0 [ 30.161313] do_vmi_munmap+0x1f1/0x2b0 [ 30.161818] mmap_region+0x1f9/0x2660 [ 30.162322] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.162852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.163603] ? __pfx_lock_acquire+0x10/0x10 [ 30.164171] ? __pfx_mmap_region+0x10/0x10 [ 30.164726] ? security_mmap_addr+0x7d/0xa0 [ 30.165277] ? get_unmapped_area+0x1f5/0x3f0 [ 30.165827] do_mmap+0x854/0xf00 [ 30.166286] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.166799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.167384] ksys_mmap_pgoff+0x3af/0x500 [ 30.167916] do_syscall_64+0x3f/0x90 [ 30.168420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.169091] RIP: 0033:0x7fb9d3119d82 [ 30.169588] 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 [ 30.171814] RSP: 002b:00007ffe0c4a88f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.172749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9d3119d82 [ 30.173636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9d2553000 [ 30.174532] RBP: 00007fb9d2553000 R08: 0000000000000009 R09: 0000000000001000 [ 30.175411] R10: 0000000000000812 R11: 0000000000000206 R12: 000055585f3f3ec0 [ 30.176304] R13: 00007ffe0c4a8910 R14: 00007ffe0c4a8940 R15: 00007ffe0c4a8ca0 [ 30.177204] [ 30.177517] [ 30.177739] Allocated by task 213: [ 30.178184] kasan_save_stack+0x22/0x50 [ 30.178713] kasan_set_track+0x25/0x30 [ 30.179241] __kasan_slab_alloc+0x59/0x70 [ 30.179792] kmem_cache_alloc+0x16b/0x370 [ 30.180346] vm_area_dup+0x20/0x160 [ 30.180819] __split_vma+0x170/0x950 [ 30.181315] split_vma+0xc6/0x110 [ 30.181785] mprotect_fixup+0x8d2/0xb30 [ 30.182310] do_mprotect_pkey+0x87e/0xd40 [ 30.182856] __x64_sys_mprotect+0x78/0xc0 [ 30.183396] do_syscall_64+0x3f/0x90 [ 30.183894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.184554] [ 30.184772] Freed by task 213: [ 30.185193] kasan_save_stack+0x22/0x50 [ 30.185714] kasan_set_track+0x25/0x30 [ 30.186223] kasan_save_free_info+0x2b/0x50 [ 30.186758] __kasan_slab_free+0x10a/0x190 [ 30.187306] kmem_cache_free+0x10d/0x4d0 [ 30.187903] rcu_core+0x8c8/0x2860 [ 30.188371] __do_softirq+0x1b7/0x7d4 [ 30.188865] [ 30.189088] Last potentially related work creation: [ 30.189691] kasan_save_stack+0x22/0x50 [ 30.190218] __kasan_record_aux_stack+0x8e/0xa0 [ 30.190813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.191486] remove_vma+0x139/0x170 [ 30.191949] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.192534] do_vmi_munmap+0x1f1/0x2b0 [ 30.193034] __vm_munmap+0x138/0x3a0 [ 30.193536] __x64_sys_munmap+0x59/0x80 [ 30.194048] do_syscall_64+0x3f/0x90 [ 30.194542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.195202] [ 30.195419] The buggy address belongs to the object at ffff888016e6a488 [ 30.195419] which belongs to the cache vm_area_struct of size 168 [ 30.196931] The buggy address is located 88 bytes inside of [ 30.196931] freed 168-byte region [ffff888016e6a488, ffff888016e6a530) [ 30.198406] [ 30.198630] The buggy address belongs to the physical page: [ 30.199311] page:00000000ebc4bdf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e6a [ 30.200443] memcg:ffff88800f089201 [ 30.200878] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.201556] page_type: 0xffffffff() [ 30.202027] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.202994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f089201 [ 30.203945] page dumped because: kasan: bad access detected [ 30.204624] [ 30.204838] Memory state around the buggy address: [ 30.205447] ffff888016e6a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.206342] ffff888016e6a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.207228] >ffff888016e6a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.208099] ^ [ 30.208883] ffff888016e6a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.209786] ffff888016e6a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.210670] ================================================================== [ 30.211599] Disabling lock debugging due to kernel taint [ 33.100996] BUG: Bad rss-counter state mm:0000000009f17ddc type:MM_FILEPAGES val:33 [ 33.102201] BUG: Bad rss-counter state mm:0000000009f17ddc type:MM_ANONPAGES val:22 [ 33.578928] BUG: Bad rss-counter state mm:000000007d80ee54 type:MM_FILEPAGES val:33 [ 33.580185] BUG: Bad rss-counter state mm:000000007d80ee54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30629' (ECDSA) to the list of known hosts. 2023/06/20 16:47:16 fuzzer started 2023/06/20 16:47:16 dialing manager at localhost:36067 2023/06/20 16:47:16 checking machine... 2023/06/20 16:47:16 checking revisions... [ 34.191800] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:47:16 testing simple program... [ 34.235845] cgroup: Unknown subsys name 'net' [ 34.298993] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:47:16 Registers: info registers vcpu 0 RAX=ffff888008d90000 RBX=ffff888008d9f9c8 RCX=ffffffff81132ffe RDX=ffff888008d9f8e0 RSI=0000000000000000 RDI=ffff888008d9f9a0 RBP=ffff888008d90000 RSP=ffff888008d9f8e0 R8 =0000000000000130 R9 =0000000000000000 R10=ffff888008d9f930 R11=0000000000000128 R12=0000000000000000 R13=ffff888008d9f958 R14=ffff888008d9f978 R15=ffff888008d9f930 RIP=ffffffff81133010 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=00007fff2ead6968 CR3=000000000ca42000 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=2035313a37343a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37343a3631203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000008affe RBX=0000000000000001 RCX=ffffffff8364e0a1 RDX=0000000000000001 RSI=ffffffff863b5cfc RDI=ffffffff85fa69bc RBP=ffff88806cf09af0 RSP=ffff88806cf09a18 R8 =ffffffff863b5cfc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008affe R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc12 RFL=00000202 [-------] 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 00007fcf76c96900 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=00007f88645a6650 CR3=000000000d720000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8055840b6c5395c000000000000ae988 XMM05=08642d6a62a98f990000000000133700 XMM06=4fda316b135da52b00000000001324f0 XMM07=fb795ef6d65770560000000000122828 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000