syzkaller login: [ 31.089774] sshd (213) used greatest stack depth: 24128 bytes left [ 31.091259] BUG: Bad rss-counter state mm:000000006a5316ce type:MM_FILEPAGES val:33 [ 31.092023] BUG: Bad rss-counter state mm:000000006a5316ce type:MM_ANONPAGES val:22 [ 31.265720] ================================================================== [ 31.266841] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.267965] Read of size 8 at addr ffff88801b447140 by task sshd/220 [ 31.268916] [ 31.269149] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.270086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.271120] Call Trace: [ 31.271465] [ 31.271765] dump_stack_lvl+0x91/0xf0 [ 31.272290] print_report+0xcc/0x620 [ 31.272801] ? __virt_addr_valid+0x102/0x340 [ 31.273382] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274068] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274749] kasan_report+0xbe/0xf0 [ 31.275262] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.275951] vma_interval_tree_remove+0xc75/0xec0 [ 31.276611] vma_prepare+0xc54/0x11a0 [ 31.277135] __split_vma+0x5af/0x950 [ 31.277651] ? __pfx___split_vma+0x10/0x10 [ 31.278254] ? find_held_lock+0x2c/0x110 [ 31.278830] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.279451] ? lock_is_held_type+0x9f/0x120 [ 31.280042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.280706] ? mtree_range_walk+0x632/0x900 [ 31.281319] ? mas_walk+0x5c7/0x7c0 [ 31.281839] do_vmi_munmap+0x1f1/0x2b0 [ 31.282396] mmap_region+0x1f9/0x2660 [ 31.282911] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.283459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.284230] ? __pfx_lock_acquire+0x10/0x10 [ 31.284812] ? __pfx_mmap_region+0x10/0x10 [ 31.285399] ? security_mmap_addr+0x7d/0xa0 [ 31.285992] ? get_unmapped_area+0x1f5/0x3f0 [ 31.286601] do_mmap+0x854/0xf00 [ 31.287090] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.287634] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.288257] ksys_mmap_pgoff+0x3af/0x500 [ 31.288820] do_syscall_64+0x3f/0x90 [ 31.289360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290116] RIP: 0033:0x7ff935886d82 [ 31.290623] 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 [ 31.292993] RSP: 002b:00007ffd8a868018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.294016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff935886d82 [ 31.294956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff934cc0000 [ 31.295899] RBP: 00007ff934cc0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.296841] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f49e663ec0 [ 31.297775] R13: 00007ffd8a868030 R14: 00007ffd8a868060 R15: 00007ffd8a8683c0 [ 31.298735] [ 31.299060] [ 31.299300] Allocated by task 213: [ 31.299777] kasan_save_stack+0x22/0x50 [ 31.300338] kasan_set_track+0x25/0x30 [ 31.300883] __kasan_slab_alloc+0x59/0x70 [ 31.301465] kmem_cache_alloc+0x16b/0x370 [ 31.302059] vm_area_dup+0x20/0x160 [ 31.302564] __split_vma+0x170/0x950 [ 31.303086] split_vma+0xc6/0x110 [ 31.303580] mprotect_fixup+0x8d2/0xb30 [ 31.304133] do_mprotect_pkey+0x87e/0xd40 [ 31.304710] __x64_sys_mprotect+0x78/0xc0 [ 31.305286] do_syscall_64+0x3f/0x90 [ 31.305816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306538] [ 31.306773] Freed by task 213: [ 31.307211] kasan_save_stack+0x22/0x50 [ 31.307775] kasan_set_track+0x25/0x30 [ 31.308328] kasan_save_free_info+0x2b/0x50 [ 31.308915] __kasan_slab_free+0x10a/0x190 [ 31.309510] kmem_cache_free+0x10d/0x4d0 [ 31.310095] rcu_core+0x8c8/0x2860 [ 31.310588] __do_softirq+0x1b7/0x7d4 [ 31.311119] [ 31.311357] Last potentially related work creation: [ 31.312000] kasan_save_stack+0x22/0x50 [ 31.312561] __kasan_record_aux_stack+0x8e/0xa0 [ 31.313201] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.313918] remove_vma+0x139/0x170 [ 31.314421] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.315020] do_vmi_munmap+0x1f1/0x2b0 [ 31.315539] __vm_munmap+0x138/0x3a0 [ 31.316038] __x64_sys_munmap+0x59/0x80 [ 31.316575] do_syscall_64+0x3f/0x90 [ 31.317096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317813] [ 31.318075] The buggy address belongs to the object at ffff88801b4470e8 [ 31.318075] which belongs to the cache vm_area_struct of size 168 [ 31.319708] The buggy address is located 88 bytes inside of [ 31.319708] freed 168-byte region [ffff88801b4470e8, ffff88801b447190) [ 31.321262] [ 31.321502] The buggy address belongs to the physical page: [ 31.322240] page:0000000045b66f4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b447 [ 31.323449] memcg:ffff88800e192101 [ 31.323919] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.324635] page_type: 0xffffffff() [ 31.325138] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.326179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e192101 [ 31.327185] page dumped because: kasan: bad access detected [ 31.327893] [ 31.328125] Memory state around the buggy address: [ 31.328743] ffff88801b447000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.329661] ffff88801b447080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.330583] >ffff88801b447100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.331492] ^ [ 31.332175] ffff88801b447180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.333081] ffff88801b447200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.334007] ================================================================== [ 31.335217] Disabling lock debugging due to kernel taint [ 33.589375] BUG: Bad rss-counter state mm:0000000062fa399f type:MM_FILEPAGES val:33 [ 33.590556] BUG: Bad rss-counter state mm:0000000062fa399f type:MM_ANONPAGES val:22 [ 34.000153] BUG: Bad rss-counter state mm:000000000bf5d543 type:MM_FILEPAGES val:33 [ 34.001508] BUG: Bad rss-counter state mm:000000000bf5d543 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34035' (ECDSA) to the list of known hosts. 2023/06/20 15:29:19 fuzzer started 2023/06/20 15:29:19 dialing manager at localhost:36067 2023/06/20 15:29:19 checking machine... 2023/06/20 15:29:19 checking revisions... [ 34.740930] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:29:19 testing simple program... [ 34.802768] cgroup: Unknown subsys name 'net' [ 34.858027] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:29:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d8a1b40 RSI=ffffffff81894a8a RDI=0000000000000005 RBP=ffff88800b5b8c98 RSP=ffff8880147f7578 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c7379732f R12=0000000000000000 R13=0000000000000081 R14=ffffffff856f0da0 R15=ffff88800b5b8c9a RIP=ffffffff814c089b 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 00007f64e88dd900 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=00007f64e7d1bad0 CR3=0000000009a82000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7255545e20e6a0f200000000000ae988 XMM05=3bfae084822f1b1f00000000001334c0 XMM06=19e9129bd510f2350000000000132358 XMM07=fb795ef6d65770560000000000122330 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880098cf200 RCX=ffffffff81f7412d RDX=1ffff11002b8df89 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015c6fc20 RSP=ffff888015c6fa08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000001 R14=0000000000000007 R15=0000000000001032 RIP=ffffffff814c0348 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 00007f1a1db25900 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=00007ffce0200000 CR3=000000001804c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000