syzkaller login: [ 30.516859] BUG: Bad rss-counter state mm:000000008d67c153 type:MM_FILEPAGES val:33 [ 30.518055] BUG: Bad rss-counter state mm:000000008d67c153 type:MM_ANONPAGES val:22 [ 30.558881] ================================================================== [ 30.560116] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.561168] Read of size 8 at addr ffff88800d623d08 by task sshd/220 [ 30.562022] [ 30.562266] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.563245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.564358] Call Trace: [ 30.564717] [ 30.565048] dump_stack_lvl+0x91/0xf0 [ 30.565610] print_report+0xcc/0x620 [ 30.566154] ? __virt_addr_valid+0x102/0x340 [ 30.566771] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.567458] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.568176] kasan_report+0xbe/0xf0 [ 30.568717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.569607] vma_interval_tree_remove+0xc75/0xec0 [ 30.570290] vma_prepare+0xc54/0x11a0 [ 30.570835] __split_vma+0x5af/0x950 [ 30.571375] ? __pfx___split_vma+0x10/0x10 [ 30.571956] ? find_held_lock+0x2c/0x110 [ 30.572572] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.573216] ? lock_is_held_type+0x9f/0x120 [ 30.573833] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.574522] ? mtree_range_walk+0x632/0x900 [ 30.575145] ? mas_walk+0x5c7/0x7c0 [ 30.575687] do_vmi_munmap+0x1f1/0x2b0 [ 30.576251] mmap_region+0x1f9/0x2660 [ 30.576793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.577370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.578177] ? __pfx_lock_acquire+0x10/0x10 [ 30.578792] ? __pfx_mmap_region+0x10/0x10 [ 30.579397] ? security_mmap_addr+0x7d/0xa0 [ 30.579996] ? get_unmapped_area+0x1f5/0x3f0 [ 30.580648] do_mmap+0x854/0xf00 [ 30.581152] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.581715] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.582361] ksys_mmap_pgoff+0x3af/0x500 [ 30.582927] do_syscall_64+0x3f/0x90 [ 30.583472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.584209] RIP: 0033:0x7f42d71d8d82 [ 30.584729] 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 [ 30.587086] RSP: 002b:00007fff11353b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.588106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42d71d8d82 [ 30.589058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42d6612000 [ 30.590005] RBP: 00007f42d6612000 R08: 0000000000000009 R09: 0000000000001000 [ 30.590962] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596faa2fec0 [ 30.591918] R13: 00007fff11353b60 R14: 00007fff11353b90 R15: 00007fff11353ef0 [ 30.592899] [ 30.593232] [ 30.593474] Allocated by task 213: [ 30.593957] kasan_save_stack+0x22/0x50 [ 30.594525] kasan_set_track+0x25/0x30 [ 30.595093] __kasan_slab_alloc+0x59/0x70 [ 30.595684] kmem_cache_alloc+0x16b/0x370 [ 30.596273] vm_area_dup+0x20/0x160 [ 30.596791] __split_vma+0x170/0x950 [ 30.597326] split_vma+0xc6/0x110 [ 30.597822] mprotect_fixup+0x8d2/0xb30 [ 30.598399] do_mprotect_pkey+0x87e/0xd40 [ 30.598984] __x64_sys_mprotect+0x78/0xc0 [ 30.599569] do_syscall_64+0x3f/0x90 [ 30.600123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.600835] [ 30.601075] Freed by task 203: [ 30.601499] kasan_save_stack+0x22/0x50 [ 30.602060] kasan_set_track+0x25/0x30 [ 30.602613] kasan_save_free_info+0x2b/0x50 [ 30.603191] __kasan_slab_free+0x10a/0x190 [ 30.603783] kmem_cache_free+0x10d/0x4d0 [ 30.604353] rcu_core+0x8c8/0x2860 [ 30.604840] __do_softirq+0x1b7/0x7d4 [ 30.605373] [ 30.605618] Last potentially related work creation: [ 30.606263] kasan_save_stack+0x22/0x50 [ 30.606817] __kasan_record_aux_stack+0x8e/0xa0 [ 30.607464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.608189] remove_vma+0x139/0x170 [ 30.608700] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.609308] do_vmi_munmap+0x1f1/0x2b0 [ 30.609835] __vm_munmap+0x138/0x3a0 [ 30.610356] __x64_sys_munmap+0x59/0x80 [ 30.610914] do_syscall_64+0x3f/0x90 [ 30.611455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.612196] [ 30.612435] Second to last potentially related work creation: [ 30.613187] kasan_save_stack+0x22/0x50 [ 30.613741] __kasan_record_aux_stack+0x8e/0xa0 [ 30.614405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.615128] remove_vma+0x139/0x170 [ 30.615634] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.616264] do_vmi_munmap+0x1f1/0x2b0 [ 30.616815] mmap_region+0x1f9/0x2660 [ 30.617356] do_mmap+0x854/0xf00 [ 30.617845] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.618408] ksys_mmap_pgoff+0x3af/0x500 [ 30.618978] do_syscall_64+0x3f/0x90 [ 30.619523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.620278] [ 30.620527] The buggy address belongs to the object at ffff88800d623cb0 [ 30.620527] which belongs to the cache vm_area_struct of size 168 [ 30.622197] The buggy address is located 88 bytes inside of [ 30.622197] freed 168-byte region [ffff88800d623cb0, ffff88800d623d58) [ 30.623800] [ 30.624053] The buggy address belongs to the physical page: [ 30.624809] page:000000003b20b893 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd623 [ 30.626048] memcg:ffff88800d01b901 [ 30.626541] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.627305] page_type: 0xffffffff() [ 30.627844] raw: 0100000000000200 ffff8880087a0c80 ffffea0000257040 dead000000000006 [ 30.628948] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d01b901 [ 30.630020] page dumped because: kasan: bad access detected [ 30.630803] [ 30.631058] Memory state around the buggy address: [ 30.631734] ffff88800d623c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.632763] ffff88800d623c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.633775] >ffff88800d623d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.634776] ^ [ 30.635293] ffff88800d623d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.636310] ffff88800d623e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.637294] ================================================================== [ 30.638553] Disabling lock debugging due to kernel taint [ 32.893220] BUG: Bad rss-counter state mm:000000005f67a01c type:MM_FILEPAGES val:33 [ 32.894384] BUG: Bad rss-counter state mm:000000005f67a01c type:MM_ANONPAGES val:22 [ 33.280290] BUG: Bad rss-counter state mm:000000007b5f7954 type:MM_FILEPAGES val:33 [ 33.281465] BUG: Bad rss-counter state mm:000000007b5f7954 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30001' (ECDSA) to the list of known hosts. 2023/06/20 16:32:47 fuzzer started 2023/06/20 16:32:48 dialing manager at localhost:36067 2023/06/20 16:32:48 checking machine... 2023/06/20 16:32:48 checking revisions... [ 33.988160] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:32:48 testing simple program... [ 34.033130] cgroup: Unknown subsys name 'net' [ 34.074577] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:32:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016067528 RCX=0000000000000001 RDX=1ffff11002c0ceb0 RSI=ffff888016067bb8 RDI=ffffffff81af9b83 RBP=ffff888016067580 RSP=ffff888016067510 R8 =0000000000000001 R9 =ffff888016067568 R10=0000000000038001 R11=000000000001a76a R12=ffff8880160675f0 R13=0000000000000000 R14=ffff888015b81b40 R15=0000000000000d40 RIP=ffffffff81130399 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 00007f35c1744700 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=00007fd982d1a000 CR3=000000000ef42000 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=2037343a32333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a32333a3631203032 XMM08=00007f35b4003a500000006a00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011c6f22 RSI=ffffffff82196cf2 RDI=ffff888008e378d0 RBP=ffff888008e37928 RSP=ffff888008e37860 R8 =0000000000000001 R9 =ffff888008e37910 R10=0000000000038001 R11=0000000000020d09 R12=ffff888008e37930 R13=ffff888008e37918 R14=ffff888008e37911 R15=ffff888008e378d0 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 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=00007fe7d930f618 CR3=000000000f7b4000 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