syzkaller login: [ 31.312274] BUG: Bad rss-counter state mm:0000000049d1a023 type:MM_FILEPAGES val:33 [ 31.313516] BUG: Bad rss-counter state mm:0000000049d1a023 type:MM_ANONPAGES val:22 [ 31.357783] ================================================================== [ 31.358965] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.359908] Read of size 8 at addr ffff888016d9c140 by task sshd/221 [ 31.360696] [ 31.360912] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.361780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.362746] Call Trace: [ 31.363065] [ 31.363354] dump_stack_lvl+0x91/0xf0 [ 31.363863] print_report+0xcc/0x620 [ 31.364351] ? __virt_addr_valid+0x102/0x340 [ 31.364921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365551] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.366163] kasan_report+0xbe/0xf0 [ 31.366648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367265] vma_interval_tree_remove+0xc75/0xec0 [ 31.367867] vma_prepare+0xc54/0x11a0 [ 31.368352] __split_vma+0x5af/0x950 [ 31.368870] ? __pfx___split_vma+0x10/0x10 [ 31.369410] ? find_held_lock+0x2c/0x110 [ 31.369932] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.370498] ? lock_is_held_type+0x9f/0x120 [ 31.371035] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.371646] ? mtree_range_walk+0x632/0x900 [ 31.372192] ? mas_walk+0x5c7/0x7c0 [ 31.372694] do_vmi_munmap+0x1f1/0x2b0 [ 31.373182] mmap_region+0x1f9/0x2660 [ 31.373698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.374208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.374933] ? __pfx_lock_acquire+0x10/0x10 [ 31.375476] ? __pfx_mmap_region+0x10/0x10 [ 31.376000] ? security_mmap_addr+0x7d/0xa0 [ 31.376570] ? get_unmapped_area+0x1f5/0x3f0 [ 31.377129] do_mmap+0x854/0xf00 [ 31.377576] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.378070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.378655] ksys_mmap_pgoff+0x3af/0x500 [ 31.379164] do_syscall_64+0x3f/0x90 [ 31.379660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380308] RIP: 0033:0x7fde83fffd82 [ 31.380793] 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 [ 31.382921] RSP: 002b:00007ffe8fcb5718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.383936] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde83fffd82 [ 31.384808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde83439000 [ 31.385662] RBP: 00007fde83439000 R08: 0000000000000009 R09: 0000000000001000 [ 31.386518] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564351da2ec0 [ 31.387371] R13: 00007ffe8fcb5730 R14: 00007ffe8fcb5760 R15: 00007ffe8fcb5ac0 [ 31.388238] [ 31.388582] [ 31.388814] Allocated by task 214: [ 31.389277] kasan_save_stack+0x22/0x50 [ 31.389832] kasan_set_track+0x25/0x30 [ 31.390371] __kasan_slab_alloc+0x59/0x70 [ 31.390937] kmem_cache_alloc+0x16b/0x370 [ 31.391498] vm_area_dup+0x20/0x160 [ 31.391985] __split_vma+0x170/0x950 [ 31.392491] split_vma+0xc6/0x110 [ 31.392969] mprotect_fixup+0x8d2/0xb30 [ 31.393535] do_mprotect_pkey+0x87e/0xd40 [ 31.394090] __x64_sys_mprotect+0x78/0xc0 [ 31.394658] do_syscall_64+0x3f/0x90 [ 31.395166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395863] [ 31.396096] Freed by task 214: [ 31.396544] kasan_save_stack+0x22/0x50 [ 31.397083] kasan_set_track+0x25/0x30 [ 31.397622] kasan_save_free_info+0x2b/0x50 [ 31.398191] __kasan_slab_free+0x10a/0x190 [ 31.398785] kmem_cache_free+0x10d/0x4d0 [ 31.399332] rcu_core+0x8c8/0x2860 [ 31.399821] __do_softirq+0x1b7/0x7d4 [ 31.400356] [ 31.400590] Last potentially related work creation: [ 31.401189] kasan_save_stack+0x22/0x50 [ 31.401712] __kasan_record_aux_stack+0x8e/0xa0 [ 31.402298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.402964] remove_vma+0x139/0x170 [ 31.403450] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.404025] do_vmi_munmap+0x1f1/0x2b0 [ 31.404541] __vm_munmap+0x138/0x3a0 [ 31.405021] __x64_sys_munmap+0x59/0x80 [ 31.405540] do_syscall_64+0x3f/0x90 [ 31.406030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.406702] [ 31.406923] The buggy address belongs to the object at ffff888016d9c0e8 [ 31.406923] which belongs to the cache vm_area_struct of size 168 [ 31.408433] The buggy address is located 88 bytes inside of [ 31.408433] freed 168-byte region [ffff888016d9c0e8, ffff888016d9c190) [ 31.409870] [ 31.410090] The buggy address belongs to the physical page: [ 31.410766] page:000000000f5bdd00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d9c [ 31.411881] memcg:ffff888016894401 [ 31.412313] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.412981] page_type: 0xffffffff() [ 31.413469] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.414399] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016894401 [ 31.415416] page dumped because: kasan: bad access detected [ 31.416257] [ 31.416495] Memory state around the buggy address: [ 31.417107] ffff888016d9c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.417988] ffff888016d9c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.418869] >ffff888016d9c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.419731] ^ [ 31.420384] ffff888016d9c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.421262] ffff888016d9c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.422116] ================================================================== [ 31.423221] Disabling lock debugging due to kernel taint [ 33.333868] BUG: Bad rss-counter state mm:00000000b96632d6 type:MM_FILEPAGES val:33 [ 33.335312] BUG: Bad rss-counter state mm:00000000b96632d6 type:MM_ANONPAGES val:22 [ 33.813727] BUG: Bad rss-counter state mm:0000000012f20776 type:MM_FILEPAGES val:33 [ 33.814893] BUG: Bad rss-counter state mm:0000000012f20776 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21318' (ECDSA) to the list of known hosts. 2023/06/20 16:23:31 fuzzer started 2023/06/20 16:23:32 dialing manager at localhost:36067 2023/06/20 16:23:32 checking machine... 2023/06/20 16:23:32 checking revisions... [ 34.560457] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:23:32 testing simple program... [ 34.610741] cgroup: Unknown subsys name 'net' [ 34.648664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:23:31 Registers: info registers vcpu 0 RAX=ffffffff860d8257 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fd4f8a8 RSP=ffff88800fd4f7e0 R8 =ffffffff860d825a R9 =ffff88800fd4f890 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800fd4f8b0 R13=ffff88800fd4f898 R14=ffff88800fd4f8f8 R15=ffff88800fd4f850 RIP=ffffffff81130b8f RFL=00000297 [--S-APC] 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 00007fbb07da0900 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=00007ffc386d0000 CR3=000000001ce60000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f99d2645410 CR3=000000000f404000 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=2031333a33323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a33323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000