syzkaller login: [ 28.704195] BUG: Bad rss-counter state mm:000000003aef36d8 type:MM_FILEPAGES val:33 [ 28.705437] BUG: Bad rss-counter state mm:000000003aef36d8 type:MM_ANONPAGES val:22 [ 28.856826] ================================================================== [ 28.857751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.858689] Read of size 8 at addr ffff88800f001d08 by task sshd/221 [ 28.859573] [ 28.859792] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.860641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.861648] Call Trace: [ 28.861968] [ 28.862254] dump_stack_lvl+0x91/0xf0 [ 28.862743] print_report+0xcc/0x620 [ 28.863222] ? __virt_addr_valid+0x102/0x340 [ 28.863772] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.864391] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.865015] kasan_report+0xbe/0xf0 [ 28.865486] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866103] vma_interval_tree_remove+0xc75/0xec0 [ 28.866712] vma_prepare+0xc54/0x11a0 [ 28.867195] __split_vma+0x5af/0x950 [ 28.867667] ? __pfx___split_vma+0x10/0x10 [ 28.868192] ? find_held_lock+0x2c/0x110 [ 28.868709] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.869284] ? lock_is_held_type+0x9f/0x120 [ 28.869820] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.870430] ? mtree_range_walk+0x632/0x900 [ 28.870982] ? mas_walk+0x5c7/0x7c0 [ 28.871457] do_vmi_munmap+0x1f1/0x2b0 [ 28.871943] mmap_region+0x1f9/0x2660 [ 28.872429] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.872953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.873674] ? __pfx_lock_acquire+0x10/0x10 [ 28.874212] ? __pfx_mmap_region+0x10/0x10 [ 28.874736] ? security_mmap_addr+0x7d/0xa0 [ 28.875265] ? get_unmapped_area+0x1f5/0x3f0 [ 28.875817] do_mmap+0x854/0xf00 [ 28.876254] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.876746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.877316] ksys_mmap_pgoff+0x3af/0x500 [ 28.877821] do_syscall_64+0x3f/0x90 [ 28.878298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.878950] RIP: 0033:0x7fb25fe3fd82 [ 28.879404] 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 [ 28.881540] RSP: 002b:00007ffd4b5c40c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.882437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb25fe3fd82 [ 28.883282] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb25f279000 [ 28.884124] RBP: 00007fb25f279000 R08: 0000000000000009 R09: 0000000000001000 [ 28.884974] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d01a526b20 [ 28.885830] R13: 00007ffd4b5c40e0 R14: 00007ffd4b5c4110 R15: 00007ffd4b5c4470 [ 28.886676] [ 28.886965] [ 28.887180] Allocated by task 214: [ 28.887607] kasan_save_stack+0x22/0x50 [ 28.888106] kasan_set_track+0x25/0x30 [ 28.888592] __kasan_slab_alloc+0x59/0x70 [ 28.889127] kmem_cache_alloc+0x16b/0x370 [ 28.889645] vm_area_dup+0x20/0x160 [ 28.890092] __split_vma+0x170/0x950 [ 28.890554] split_vma+0xc6/0x110 [ 28.890993] mprotect_fixup+0x8d2/0xb30 [ 28.891499] do_mprotect_pkey+0x87e/0xd40 [ 28.892019] __x64_sys_mprotect+0x78/0xc0 [ 28.892540] do_syscall_64+0x3f/0x90 [ 28.893014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.893652] [ 28.893865] Freed by task 214: [ 28.894254] kasan_save_stack+0x22/0x50 [ 28.894755] kasan_set_track+0x25/0x30 [ 28.895241] kasan_save_free_info+0x2b/0x50 [ 28.895774] __kasan_slab_free+0x10a/0x190 [ 28.896304] kmem_cache_free+0x10d/0x4d0 [ 28.896808] rcu_core+0x8c8/0x2860 [ 28.897265] __do_softirq+0x1b7/0x7d4 [ 28.897743] [ 28.897956] Last potentially related work creation: [ 28.898546] kasan_save_stack+0x22/0x50 [ 28.899046] __kasan_record_aux_stack+0x8e/0xa0 [ 28.899610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.900238] remove_vma+0x139/0x170 [ 28.900688] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.901251] do_vmi_munmap+0x1f1/0x2b0 [ 28.901740] __vm_munmap+0x138/0x3a0 [ 28.902209] __x64_sys_munmap+0x59/0x80 [ 28.902699] do_syscall_64+0x3f/0x90 [ 28.903169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903818] [ 28.904031] Second to last potentially related work creation: [ 28.904729] kasan_save_stack+0x22/0x50 [ 28.905245] __kasan_record_aux_stack+0x8e/0xa0 [ 28.905826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.906458] remove_vma+0x139/0x170 [ 28.906907] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.907471] do_vmi_munmap+0x1f1/0x2b0 [ 28.907959] mmap_region+0x1f9/0x2660 [ 28.908437] do_mmap+0x854/0xf00 [ 28.908888] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.909415] ksys_mmap_pgoff+0x3af/0x500 [ 28.909937] do_syscall_64+0x3f/0x90 [ 28.910425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.911098] [ 28.911318] The buggy address belongs to the object at ffff88800f001cb0 [ 28.911318] which belongs to the cache vm_area_struct of size 168 [ 28.912836] The buggy address is located 88 bytes inside of [ 28.912836] freed 168-byte region [ffff88800f001cb0, ffff88800f001d58) [ 28.914298] [ 28.914522] The buggy address belongs to the physical page: [ 28.915207] page:00000000fafa827d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf001 [ 28.916334] memcg:ffff8880140e3b01 [ 28.916773] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.917452] page_type: 0xffffffff() [ 28.917915] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.918869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140e3b01 [ 28.919809] page dumped because: kasan: bad access detected [ 28.920494] [ 28.920714] Memory state around the buggy address: [ 28.921332] ffff88800f001c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.922220] ffff88800f001c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.923103] >ffff88800f001d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.923987] ^ [ 28.924442] ffff88800f001d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.925342] ffff88800f001e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.926217] ================================================================== [ 28.927216] Disabling lock debugging due to kernel taint [ 30.915247] BUG: Bad rss-counter state mm:00000000edfcef7d type:MM_FILEPAGES val:33 [ 30.916418] BUG: Bad rss-counter state mm:00000000edfcef7d type:MM_ANONPAGES val:22 [ 31.342401] BUG: Bad rss-counter state mm:00000000a4407282 type:MM_FILEPAGES val:33 [ 31.343485] BUG: Bad rss-counter state mm:00000000a4407282 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15093' (ECDSA) to the list of known hosts. 2023/06/21 07:04:22 fuzzer started 2023/06/21 07:04:22 dialing manager at localhost:36067 2023/06/21 07:04:22 checking machine... 2023/06/21 07:04:22 checking revisions... [ 31.979148] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:04:22 testing simple program... [ 32.031032] cgroup: Unknown subsys name 'net' [ 32.074974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:04:22 Registers: info registers vcpu 0 RAX=1ffff1100342daab RBX=ffff88801a16d528 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a16d558 RBP=ffff88801a2c6660 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88801a2805c0 R14=ffffffff813782f8 R15=ffff88801a2805c0 RIP=ffffffff818464e2 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=00007f762078afd0 CR3=000000000c956000 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=da9a24bee137829dcd4cd5eebb555e9d XMM02=000000000011a918ec2efd57dc4c00df XMM03=0000000000121a3867d56883d3921259 XMM04=ae6dc47a3b81354900000000000ae988 XMM05=59d5b690e0af863b0000000000133290 XMM06=194b0efbedcf1a5d00000000001320f8 XMM07=e042d86d42eb936e0000000000121d10 XMM08=67d56883d3921259000000000011a978 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81809a91 RBX=0000000000000003 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000022 RDI=ffff88806cf09b70 RBP=dffffc0000000000 RSP=ffff88806cf09ac8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000022 R13=0000000000000000 R14=ffff88806cf09b58 R15=ffff88800dc44700 RIP=ffffffff813ad625 RFL=00000287 [--S--PC] 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 00007f23f6960900 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=00007f23f6f180b0 CR3=000000001a338000 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=2031323a34303a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34303a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000