syzkaller login: [ 30.039904] BUG: Bad rss-counter state mm:00000000ff070e3d type:MM_FILEPAGES val:33 [ 30.041391] BUG: Bad rss-counter state mm:00000000ff070e3d type:MM_ANONPAGES val:22 [ 30.206252] ================================================================== [ 30.207369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.208498] Read of size 8 at addr ffff888019f1f140 by task sshd/221 [ 30.209587] [ 30.209847] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.210874] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.212129] Call Trace: [ 30.212527] [ 30.212872] dump_stack_lvl+0x91/0xf0 [ 30.213382] print_report+0xcc/0x620 [ 30.213869] ? __virt_addr_valid+0x102/0x340 [ 30.214418] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.215037] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.215665] kasan_report+0xbe/0xf0 [ 30.216163] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.216796] vma_interval_tree_remove+0xc75/0xec0 [ 30.217406] vma_prepare+0xc54/0x11a0 [ 30.217894] __split_vma+0x5af/0x950 [ 30.218380] ? __pfx___split_vma+0x10/0x10 [ 30.218918] ? find_held_lock+0x2c/0x110 [ 30.219445] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.220020] ? lock_is_held_type+0x9f/0x120 [ 30.220583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.221190] ? mtree_range_walk+0x632/0x900 [ 30.221750] ? mas_walk+0x5c7/0x7c0 [ 30.222239] do_vmi_munmap+0x1f1/0x2b0 [ 30.222747] mmap_region+0x1f9/0x2660 [ 30.223236] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.223749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.224526] ? __pfx_lock_acquire+0x10/0x10 [ 30.225080] ? __pfx_mmap_region+0x10/0x10 [ 30.225640] ? security_mmap_addr+0x7d/0xa0 [ 30.226176] ? get_unmapped_area+0x1f5/0x3f0 [ 30.226739] do_mmap+0x854/0xf00 [ 30.227218] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.227719] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.228346] ksys_mmap_pgoff+0x3af/0x500 [ 30.228860] do_syscall_64+0x3f/0x90 [ 30.229344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.230011] RIP: 0033:0x7f0b86706d82 [ 30.230514] 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 [ 30.232714] RSP: 002b:00007ffc886b8b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.233646] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b86706d82 [ 30.234511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b85b40000 [ 30.235401] RBP: 00007f0b85b40000 R08: 0000000000000009 R09: 0000000000001000 [ 30.236287] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f90b23f60 [ 30.237148] R13: 00007ffc886b8b50 R14: 00007ffc886b8b80 R15: 00007ffc886b8ee0 [ 30.238030] [ 30.238361] [ 30.238586] Allocated by task 214: [ 30.239019] kasan_save_stack+0x22/0x50 [ 30.239562] kasan_set_track+0x25/0x30 [ 30.240066] __kasan_slab_alloc+0x59/0x70 [ 30.240609] kmem_cache_alloc+0x16b/0x370 [ 30.241151] vm_area_dup+0x20/0x160 [ 30.241623] __split_vma+0x170/0x950 [ 30.242106] split_vma+0xc6/0x110 [ 30.242548] mprotect_fixup+0x8d2/0xb30 [ 30.243063] do_mprotect_pkey+0x87e/0xd40 [ 30.243627] __x64_sys_mprotect+0x78/0xc0 [ 30.244168] do_syscall_64+0x3f/0x90 [ 30.244649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.245309] [ 30.245525] Freed by task 19: [ 30.245910] kasan_save_stack+0x22/0x50 [ 30.246428] kasan_set_track+0x25/0x30 [ 30.246925] kasan_save_free_info+0x2b/0x50 [ 30.247502] __kasan_slab_free+0x10a/0x190 [ 30.248065] kmem_cache_free+0x10d/0x4d0 [ 30.248657] rcu_core+0x8c8/0x2860 [ 30.249132] __do_softirq+0x1b7/0x7d4 [ 30.249645] [ 30.249873] Last potentially related work creation: [ 30.250583] kasan_save_stack+0x22/0x50 [ 30.251130] __kasan_record_aux_stack+0x8e/0xa0 [ 30.251762] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.252489] remove_vma+0x139/0x170 [ 30.252965] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.253547] do_vmi_munmap+0x1f1/0x2b0 [ 30.254065] __vm_munmap+0x138/0x3a0 [ 30.254597] __x64_sys_munmap+0x59/0x80 [ 30.255140] do_syscall_64+0x3f/0x90 [ 30.255663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.256354] [ 30.256577] The buggy address belongs to the object at ffff888019f1f0e8 [ 30.256577] which belongs to the cache vm_area_struct of size 168 [ 30.258161] The buggy address is located 88 bytes inside of [ 30.258161] freed 168-byte region [ffff888019f1f0e8, ffff888019f1f190) [ 30.259675] [ 30.259903] The buggy address belongs to the physical page: [ 30.260664] page:00000000c60b9661 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f1f [ 30.261849] memcg:ffff8880169f3501 [ 30.262300] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.263006] page_type: 0xffffffff() [ 30.263486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.264486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169f3501 [ 30.265457] page dumped because: kasan: bad access detected [ 30.266168] [ 30.266392] Memory state around the buggy address: [ 30.267007] ffff888019f1f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.267922] ffff888019f1f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.268859] >ffff888019f1f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.269766] ^ [ 30.270445] ffff888019f1f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.271359] ffff888019f1f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.272275] ================================================================== [ 30.273273] Disabling lock debugging due to kernel taint [ 33.137757] BUG: Bad rss-counter state mm:0000000009d24fd0 type:MM_FILEPAGES val:33 [ 33.138626] BUG: Bad rss-counter state mm:0000000009d24fd0 type:MM_ANONPAGES val:22 [ 33.528165] BUG: Bad rss-counter state mm:0000000011978d90 type:MM_FILEPAGES val:33 [ 33.529405] BUG: Bad rss-counter state mm:0000000011978d90 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43967' (ECDSA) to the list of known hosts. 2023/06/20 21:59:03 fuzzer started 2023/06/20 21:59:03 dialing manager at localhost:36067 2023/06/20 21:59:03 checking machine... 2023/06/20 21:59:03 checking revisions... [ 34.214838] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:59:03 testing simple program... [ 34.263572] cgroup: Unknown subsys name 'net' [ 34.335602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff8880165c1b40 RSI=ffffffff811f7eed RDI=0000000000000000 RBP=ffff888016741880 RSP=ffff88800b9cfb70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000007 R11=0000000000000001 R12=ffff888016741800 R13=ffff888014659a00 R14=ffff88800b9cfc48 R15=000000000000004e RIP=ffffffff814c086b 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 00007fc11c6b2900 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=000055645b1892a8 CR3=000000001ce78000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800b9cfc48 RCX=ffffffff81f73c5b RDX=ffff8880165c1b40 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000001 RSP=ffff88800b9cf9e8 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffff88800b961008 R13=0000000000000001 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c0864 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 00007fc11c6b2900 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=00007fc11cc6a0b0 CR3=000000001ce78000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000