syzkaller login: [ 60.599468] BUG: Bad rss-counter state mm:0000000066123e6d type:MM_FILEPAGES val:33 [ 60.602259] BUG: Bad rss-counter state mm:0000000066123e6d type:MM_ANONPAGES val:22 [ 60.768507] ================================================================== [ 60.769634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.770799] Read of size 8 at addr ffff888019c2e880 by task sshd/228 [ 60.771809] [ 60.772035] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.772919] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.773910] Call Trace: [ 60.774228] [ 60.774513] dump_stack_lvl+0x91/0xf0 [ 60.775009] print_report+0xcc/0x620 [ 60.775496] ? __virt_addr_valid+0x102/0x340 [ 60.776042] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.776664] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.777287] kasan_report+0xbe/0xf0 [ 60.777763] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.778380] vma_interval_tree_remove+0xc75/0xec0 [ 60.778976] vma_prepare+0xc54/0x11a0 [ 60.779454] __split_vma+0x5af/0x950 [ 60.779927] ? __pfx___split_vma+0x10/0x10 [ 60.780462] ? find_held_lock+0x2c/0x110 [ 60.781003] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.781572] ? lock_is_held_type+0x9f/0x120 [ 60.782118] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.782730] ? mtree_range_walk+0x632/0x900 [ 60.783279] ? mas_walk+0x5c7/0x7c0 [ 60.783762] do_vmi_munmap+0x1f1/0x2b0 [ 60.784252] mmap_region+0x1f9/0x2660 [ 60.784739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.785252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.785962] ? __pfx_lock_acquire+0x10/0x10 [ 60.786499] ? __pfx_mmap_region+0x10/0x10 [ 60.787037] ? security_mmap_addr+0x7d/0xa0 [ 60.787568] ? get_unmapped_area+0x1f5/0x3f0 [ 60.788122] do_mmap+0x854/0xf00 [ 60.788566] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.789083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.789648] ksys_mmap_pgoff+0x3af/0x500 [ 60.790163] do_syscall_64+0x3f/0x90 [ 60.790649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.791298] RIP: 0033:0x7f8199b14d82 [ 60.791758] 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 [ 60.793910] RSP: 002b:00007ffed2474b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.794836] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8199b14d82 [ 60.795687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8198f4e000 [ 60.796541] RBP: 00007f8198f4e000 R08: 0000000000000009 R09: 0000000000001000 [ 60.797406] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6ff2d5f60 [ 60.798254] R13: 00007ffed2474b70 R14: 00007ffed2474ba0 R15: 00007ffed2474f00 [ 60.799113] [ 60.799403] [ 60.799617] Allocated by task 221: [ 60.800050] kasan_save_stack+0x22/0x50 [ 60.800551] kasan_set_track+0x25/0x30 [ 60.801072] __kasan_slab_alloc+0x59/0x70 [ 60.801596] kmem_cache_alloc+0x16b/0x370 [ 60.802118] vm_area_dup+0x20/0x160 [ 60.802572] __split_vma+0x170/0x950 [ 60.803040] split_vma+0xc6/0x110 [ 60.803481] mprotect_fixup+0x8d2/0xb30 [ 60.803983] do_mprotect_pkey+0x87e/0xd40 [ 60.804503] __x64_sys_mprotect+0x78/0xc0 [ 60.805038] do_syscall_64+0x3f/0x90 [ 60.805521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.806160] [ 60.806377] Freed by task 221: [ 60.806773] kasan_save_stack+0x22/0x50 [ 60.807278] kasan_set_track+0x25/0x30 [ 60.807774] kasan_save_free_info+0x2b/0x50 [ 60.808304] __kasan_slab_free+0x10a/0x190 [ 60.808841] kmem_cache_free+0x10d/0x4d0 [ 60.809347] rcu_core+0x8c8/0x2860 [ 60.809793] __do_softirq+0x1b7/0x7d4 [ 60.810285] [ 60.810500] Last potentially related work creation: [ 60.811089] kasan_save_stack+0x22/0x50 [ 60.811594] __kasan_record_aux_stack+0x8e/0xa0 [ 60.812179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.812843] remove_vma+0x139/0x170 [ 60.813294] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.813850] do_vmi_munmap+0x1f1/0x2b0 [ 60.814346] __vm_munmap+0x138/0x3a0 [ 60.814813] __x64_sys_munmap+0x59/0x80 [ 60.815311] do_syscall_64+0x3f/0x90 [ 60.815781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.816442] [ 60.816669] The buggy address belongs to the object at ffff888019c2e828 [ 60.816669] which belongs to the cache vm_area_struct of size 168 [ 60.818139] The buggy address is located 88 bytes inside of [ 60.818139] freed 168-byte region [ffff888019c2e828, ffff888019c2e8d0) [ 60.819557] [ 60.819768] The buggy address belongs to the physical page: [ 60.820446] page:00000000ecfc86be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c2e [ 60.821585] memcg:ffff88801582e301 [ 60.822018] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.822672] page_type: 0xffffffff() [ 60.823130] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.824053] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801582e301 [ 60.824978] page dumped because: kasan: bad access detected [ 60.825642] [ 60.825866] Memory state around the buggy address: [ 60.826457] ffff888019c2e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 60.827321] ffff888019c2e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.828184] >ffff888019c2e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.829057] ^ [ 60.829471] ffff888019c2e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.830341] ffff888019c2e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 60.831206] ================================================================== [ 60.832234] Disabling lock debugging due to kernel taint [ 62.835532] BUG: Bad rss-counter state mm:0000000096962fe5 type:MM_FILEPAGES val:33 [ 62.836707] BUG: Bad rss-counter state mm:0000000096962fe5 type:MM_ANONPAGES val:22 [ 63.280143] BUG: Bad rss-counter state mm:00000000f329089a type:MM_FILEPAGES val:33 [ 63.281360] BUG: Bad rss-counter state mm:00000000f329089a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37373' (ECDSA) to the list of known hosts. 2023/06/20 20:01:18 fuzzer started 2023/06/20 20:01:18 dialing manager at localhost:36067 2023/06/20 20:01:18 checking machine... 2023/06/20 20:01:18 checking revisions... [ 63.841860] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:01:18 testing simple program... [ 63.884199] cgroup: Unknown subsys name 'net' [ 63.935096] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015a59b40 RSI=ffffffff818ea0d1 RDI=ffff88800d9f7950 RBP=000000000000000c RSP=ffff888015857df8 R8 =0000000000000004 R9 =000000000000000c R10=0000000000000040 R11=0000000000000000 R12=ffff88800d9f7900 R13=ffff88800d6874e0 R14=dffffc0000000000 R15=00000000000000c0 RIP=ffffffff818ea0e1 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 00007fd8d9d9e700 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=00007f0ab12147f0 CR3=0000000016be4000 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=2038313a31303a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3733 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3733325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a31303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11002d48f10 RSI=ffffffff8180ce89 RDI=ffff888016a478f0 RBP=ffff888016a478c0 RSP=ffff888016a47820 R8 =ffffffff86138eb4 R9 =ffff888016a47868 R10=0000000000038001 R11=0000000000020d9c R12=ffff888016a478f0 R13=0000000000000000 R14=ffff8880164d51c0 R15=0000000000092cc0 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007ff307fc1900 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=00007ffd53c67000 CR3=000000000ed86000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000