syzkaller login: [ 30.998011] BUG: Bad rss-counter state mm:0000000099b002d4 type:MM_FILEPAGES val:33 [ 30.999995] BUG: Bad rss-counter state mm:0000000099b002d4 type:MM_ANONPAGES val:22 [ 31.175833] ================================================================== [ 31.176774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.177725] Read of size 8 at addr ffff88800efad310 by task sshd/220 [ 31.178493] [ 31.178716] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.179756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.180759] Call Trace: [ 31.181080] [ 31.181383] dump_stack_lvl+0x91/0xf0 [ 31.181881] print_report+0xcc/0x620 [ 31.182367] ? __virt_addr_valid+0x102/0x340 [ 31.182920] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183537] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184174] kasan_report+0xbe/0xf0 [ 31.184655] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185305] vma_interval_tree_remove+0xc75/0xec0 [ 31.185937] vma_prepare+0xc54/0x11a0 [ 31.186445] __split_vma+0x5af/0x950 [ 31.186951] ? __pfx___split_vma+0x10/0x10 [ 31.187512] ? find_held_lock+0x2c/0x110 [ 31.188073] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.188674] ? lock_is_held_type+0x9f/0x120 [ 31.189246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189883] ? mtree_range_walk+0x632/0x900 [ 31.190464] ? mas_walk+0x5c7/0x7c0 [ 31.190974] do_vmi_munmap+0x1f1/0x2b0 [ 31.191489] mmap_region+0x1f9/0x2660 [ 31.192027] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.192584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.193336] ? __pfx_lock_acquire+0x10/0x10 [ 31.193896] ? __pfx_mmap_region+0x10/0x10 [ 31.194456] ? security_mmap_addr+0x7d/0xa0 [ 31.195032] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195619] do_mmap+0x854/0xf00 [ 31.196091] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.197211] ksys_mmap_pgoff+0x3af/0x500 [ 31.197746] do_syscall_64+0x3f/0x90 [ 31.198251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198933] RIP: 0033:0x7f174c4f9d82 [ 31.199418] 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 [ 31.201692] RSP: 002b:00007ffe0b49bdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.202648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f174c4f9d82 [ 31.203550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f174b933000 [ 31.204461] RBP: 00007f174b933000 R08: 0000000000000009 R09: 0000000000001000 [ 31.205354] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591817f8ec0 [ 31.206265] R13: 00007ffe0b49be10 R14: 00007ffe0b49be40 R15: 00007ffe0b49c1a0 [ 31.207187] [ 31.207494] [ 31.207719] Allocated by task 213: [ 31.208176] kasan_save_stack+0x22/0x50 [ 31.208708] kasan_set_track+0x25/0x30 [ 31.209236] __kasan_slab_alloc+0x59/0x70 [ 31.209795] kmem_cache_alloc+0x16b/0x370 [ 31.210343] vm_area_dup+0x20/0x160 [ 31.210826] __split_vma+0x170/0x950 [ 31.211318] split_vma+0xc6/0x110 [ 31.211782] mprotect_fixup+0x8d2/0xb30 [ 31.212330] do_mprotect_pkey+0x87e/0xd40 [ 31.212885] __x64_sys_mprotect+0x78/0xc0 [ 31.213446] do_syscall_64+0x3f/0x90 [ 31.213952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214636] [ 31.214871] Freed by task 213: [ 31.215287] kasan_save_stack+0x22/0x50 [ 31.215822] kasan_set_track+0x25/0x30 [ 31.216370] kasan_save_free_info+0x2b/0x50 [ 31.216931] __kasan_slab_free+0x10a/0x190 [ 31.217496] kmem_cache_free+0x10d/0x4d0 [ 31.218037] rcu_core+0x8c8/0x2860 [ 31.218508] __do_softirq+0x1b7/0x7d4 [ 31.219017] [ 31.219247] Last potentially related work creation: [ 31.219861] kasan_save_stack+0x22/0x50 [ 31.220470] __kasan_record_aux_stack+0x8e/0xa0 [ 31.221072] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.221763] remove_vma+0x139/0x170 [ 31.222239] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.222827] do_vmi_munmap+0x1f1/0x2b0 [ 31.223342] __vm_munmap+0x138/0x3a0 [ 31.223833] __x64_sys_munmap+0x59/0x80 [ 31.224392] do_syscall_64+0x3f/0x90 [ 31.224896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225581] [ 31.225810] The buggy address belongs to the object at ffff88800efad2b8 [ 31.225810] which belongs to the cache vm_area_struct of size 168 [ 31.227372] The buggy address is located 88 bytes inside of [ 31.227372] freed 168-byte region [ffff88800efad2b8, ffff88800efad360) [ 31.228885] [ 31.229120] The buggy address belongs to the physical page: [ 31.229828] page:000000005b43f91c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefad [ 31.230978] memcg:ffff888018cb1901 [ 31.231432] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.232124] page_type: 0xffffffff() [ 31.232602] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.233573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018cb1901 [ 31.234534] page dumped because: kasan: bad access detected [ 31.235238] [ 31.235469] Memory state around the buggy address: [ 31.236112] ffff88800efad200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.237026] ffff88800efad280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.237944] >ffff88800efad300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.238871] ^ [ 31.239376] ffff88800efad380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.240301] ffff88800efad400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.241212] ================================================================== [ 31.242311] Disabling lock debugging due to kernel taint [ 33.530004] BUG: Bad rss-counter state mm:000000002acbf6c5 type:MM_FILEPAGES val:33 [ 33.530683] BUG: Bad rss-counter state mm:000000002acbf6c5 type:MM_ANONPAGES val:22 [ 33.884883] BUG: Bad rss-counter state mm:000000004b54f7e5 type:MM_FILEPAGES val:33 [ 33.885712] BUG: Bad rss-counter state mm:000000004b54f7e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21207' (ECDSA) to the list of known hosts. 2023/06/21 00:51:15 fuzzer started 2023/06/21 00:51:15 dialing manager at localhost:36067 2023/06/21 00:51:15 checking machine... 2023/06/21 00:51:15 checking revisions... [ 34.503438] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:51:15 testing simple program... [ 34.548555] cgroup: Unknown subsys name 'net' [ 34.609806] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:51:15 Registers: info registers vcpu 0 RAX=1ffff11001e1f4c9 RBX=0000000000000040 RCX=dffffc0000000000 RDX=ffff8880176f51c0 RSI=ffffffff844a4ffb RDI=ffff88800f0fa648 RBP=ffff88800f0fa608 RSP=ffff8880175ffce8 R8 =0000000000000000 R9 =0000000000000008 R10=000000000000000e R11=0000000000000000 R12=0000000000000008 R13=000000000000000e R14=00007f74b7abf3ec R15=00007f74b7abcfff RIP=ffffffff844a5015 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f74b6f4e900 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=00007f74b7abf3ec CR3=000000000f100000 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=00007f96d1efecb0 CR3=000000000c98e000 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=2035313a31353a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a31353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000