syzkaller login: [ 36.168418] BUG: Bad rss-counter state mm:00000000973975b8 type:MM_FILEPAGES val:33 [ 36.170064] BUG: Bad rss-counter state mm:00000000973975b8 type:MM_ANONPAGES val:22 [ 36.338431] ================================================================== [ 36.339505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.340612] Read of size 8 at addr ffff8880165c1df0 by task sshd/220 [ 36.341589] [ 36.341811] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.342673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.343724] Call Trace: [ 36.344060] [ 36.344358] dump_stack_lvl+0x91/0xf0 [ 36.344846] print_report+0xcc/0x620 [ 36.345365] ? __virt_addr_valid+0x102/0x340 [ 36.345910] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.346516] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.347129] kasan_report+0xbe/0xf0 [ 36.347605] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.348238] vma_interval_tree_remove+0xc75/0xec0 [ 36.348839] vma_prepare+0xc54/0x11a0 [ 36.349326] __split_vma+0x5af/0x950 [ 36.349797] ? __pfx___split_vma+0x10/0x10 [ 36.350324] ? find_held_lock+0x2c/0x110 [ 36.350844] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.351410] ? lock_is_held_type+0x9f/0x120 [ 36.351945] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.352548] ? mtree_range_walk+0x632/0x900 [ 36.353113] ? mas_walk+0x5c7/0x7c0 [ 36.353586] do_vmi_munmap+0x1f1/0x2b0 [ 36.354071] mmap_region+0x1f9/0x2660 [ 36.354552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.355058] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.355767] ? __pfx_lock_acquire+0x10/0x10 [ 36.356293] ? __pfx_mmap_region+0x10/0x10 [ 36.356829] ? security_mmap_addr+0x7d/0xa0 [ 36.357363] ? get_unmapped_area+0x1f5/0x3f0 [ 36.357909] do_mmap+0x854/0xf00 [ 36.358342] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.358839] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.359397] ksys_mmap_pgoff+0x3af/0x500 [ 36.359900] do_syscall_64+0x3f/0x90 [ 36.360371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.361009] RIP: 0033:0x7ff47ede4d82 [ 36.361489] 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 [ 36.363612] RSP: 002b:00007fff78ee71c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.364508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff47ede4d82 [ 36.365374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff47e21e000 [ 36.366218] RBP: 00007ff47e21e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.367066] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557bdd2c2f70 [ 36.367915] R13: 00007fff78ee71e0 R14: 00007fff78ee7210 R15: 00007fff78ee7570 [ 36.368778] [ 36.369080] [ 36.369295] Allocated by task 213: [ 36.369729] kasan_save_stack+0x22/0x50 [ 36.370230] kasan_set_track+0x25/0x30 [ 36.370723] __kasan_slab_alloc+0x59/0x70 [ 36.371239] kmem_cache_alloc+0x16b/0x370 [ 36.371753] vm_area_dup+0x20/0x160 [ 36.372208] __split_vma+0x170/0x950 [ 36.372671] split_vma+0xc6/0x110 [ 36.373122] mprotect_fixup+0x8d2/0xb30 [ 36.373620] do_mprotect_pkey+0x87e/0xd40 [ 36.374140] __x64_sys_mprotect+0x78/0xc0 [ 36.374663] do_syscall_64+0x3f/0x90 [ 36.375132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.375774] [ 36.375988] Freed by task 19: [ 36.376393] kasan_save_stack+0x22/0x50 [ 36.376889] kasan_set_track+0x25/0x30 [ 36.377395] kasan_save_free_info+0x2b/0x50 [ 36.377922] __kasan_slab_free+0x10a/0x190 [ 36.378454] kmem_cache_free+0x10d/0x4d0 [ 36.378960] rcu_core+0x8c8/0x2860 [ 36.379404] __do_softirq+0x1b7/0x7d4 [ 36.379878] [ 36.380094] Last potentially related work creation: [ 36.380682] kasan_save_stack+0x22/0x50 [ 36.381210] __kasan_record_aux_stack+0x8e/0xa0 [ 36.381781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.382424] remove_vma+0x139/0x170 [ 36.382883] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.383440] do_vmi_munmap+0x1f1/0x2b0 [ 36.383919] __vm_munmap+0x138/0x3a0 [ 36.384414] __x64_sys_munmap+0x59/0x80 [ 36.384913] do_syscall_64+0x3f/0x90 [ 36.385403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.386118] [ 36.386337] The buggy address belongs to the object at ffff8880165c1d98 [ 36.386337] which belongs to the cache vm_area_struct of size 168 [ 36.387823] The buggy address is located 88 bytes inside of [ 36.387823] freed 168-byte region [ffff8880165c1d98, ffff8880165c1e40) [ 36.389303] [ 36.389517] The buggy address belongs to the physical page: [ 36.390175] page:0000000000a94d5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165c1 [ 36.391256] memcg:ffff888019c50d01 [ 36.391683] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.392321] page_type: 0xffffffff() [ 36.392772] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.393717] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c50d01 [ 36.394621] page dumped because: kasan: bad access detected [ 36.395309] [ 36.395528] Memory state around the buggy address: [ 36.396118] ffff8880165c1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.397011] ffff8880165c1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.397887] >ffff8880165c1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.398741] ^ [ 36.399551] ffff8880165c1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.400407] ffff8880165c1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.401272] ================================================================== [ 36.402215] Disabling lock debugging due to kernel taint [ 38.294912] BUG: Bad rss-counter state mm:000000005fb90474 type:MM_FILEPAGES val:33 [ 38.295850] BUG: Bad rss-counter state mm:000000005fb90474 type:MM_ANONPAGES val:22 [ 38.753803] BUG: Bad rss-counter state mm:000000002b33cb0e type:MM_FILEPAGES val:33 [ 38.754875] BUG: Bad rss-counter state mm:000000002b33cb0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32663' (ECDSA) to the list of known hosts. 2023/06/20 01:23:05 fuzzer started 2023/06/20 01:23:06 dialing manager at localhost:44161 2023/06/20 01:23:06 checking machine... 2023/06/20 01:23:06 checking revisions... [ 39.456559] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:23:06 testing simple program... [ 39.505646] cgroup: Unknown subsys name 'net' [ 39.542161] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:23:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800da477f8 RCX=0000000000000003 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88800da477b0 RBP=ffff88800fdb3680 RSP=ffff88800da47708 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88800da47760 R11=00000000000b6c88 R12=0000000000000000 R13=ffff88800da47788 R14=ffff88800fdb3680 R15=ffff88800da47760 RIP=ffffffff8450d445 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faadd7ac900 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=00007faadcccc000 CR3=000000000ec76000 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=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=310445bc32f6479000000000000ae988 XMM05=96382dbd2199c94c0000000000134cb8 XMM06=4fda316b135da52b0000000000133aa8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fdf79b4d000 RCX=0000000000000100 RDX=ffff888015b29b40 RSI=00007fdf79b4d000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff88806cf099f8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888015b29b40 R15=ffff88800f729980 RIP=ffffffff814c03b0 RFL=00000206 [-----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 00007fdf7965a900 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=00007ffd983c1000 CR3=000000000f074000 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=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