syzkaller login: [ 31.002547] BUG: Bad rss-counter state mm:000000004f7bb3c3 type:MM_FILEPAGES val:33 [ 31.003659] BUG: Bad rss-counter state mm:000000004f7bb3c3 type:MM_ANONPAGES val:22 [ 31.174528] ================================================================== [ 31.175653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.176678] Read of size 8 at addr ffff8880197beed8 by task sshd/220 [ 31.177635] [ 31.177873] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.178821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.179914] Call Trace: [ 31.180265] [ 31.180575] dump_stack_lvl+0x91/0xf0 [ 31.181121] print_report+0xcc/0x620 [ 31.181656] ? __virt_addr_valid+0x102/0x340 [ 31.182264] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.182945] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183629] kasan_report+0xbe/0xf0 [ 31.184156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184848] vma_interval_tree_remove+0xc75/0xec0 [ 31.185518] vma_prepare+0xc54/0x11a0 [ 31.186049] __split_vma+0x5af/0x950 [ 31.186572] ? __pfx___split_vma+0x10/0x10 [ 31.187179] ? find_held_lock+0x2c/0x110 [ 31.187760] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.188385] ? lock_is_held_type+0x9f/0x120 [ 31.188980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189652] ? mtree_range_walk+0x632/0x900 [ 31.190271] ? mas_walk+0x5c7/0x7c0 [ 31.190796] do_vmi_munmap+0x1f1/0x2b0 [ 31.191337] mmap_region+0x1f9/0x2660 [ 31.191852] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.192419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.193189] ? __pfx_lock_acquire+0x10/0x10 [ 31.193762] ? __pfx_mmap_region+0x10/0x10 [ 31.194323] ? security_mmap_addr+0x7d/0xa0 [ 31.194898] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195518] do_mmap+0x854/0xf00 [ 31.195991] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.197118] ksys_mmap_pgoff+0x3af/0x500 [ 31.197674] do_syscall_64+0x3f/0x90 [ 31.198184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198883] RIP: 0033:0x7effe7358d82 [ 31.199384] 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 [ 31.201709] RSP: 002b:00007fff71917e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.202712] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effe7358d82 [ 31.203659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effe6792000 [ 31.204596] RBP: 00007effe6792000 R08: 0000000000000009 R09: 0000000000001000 [ 31.205537] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa446b1d90 [ 31.206483] R13: 00007fff71917eb0 R14: 00007fff71917ee0 R15: 00007fff71918240 [ 31.207451] [ 31.207775] [ 31.208013] Allocated by task 213: [ 31.208490] kasan_save_stack+0x22/0x50 [ 31.209048] kasan_set_track+0x25/0x30 [ 31.209596] __kasan_slab_alloc+0x59/0x70 [ 31.210179] kmem_cache_alloc+0x16b/0x370 [ 31.210757] vm_area_dup+0x20/0x160 [ 31.211267] __split_vma+0x170/0x950 [ 31.211788] split_vma+0xc6/0x110 [ 31.212283] mprotect_fixup+0x8d2/0xb30 [ 31.212837] do_mprotect_pkey+0x87e/0xd40 [ 31.213413] __x64_sys_mprotect+0x78/0xc0 [ 31.213993] do_syscall_64+0x3f/0x90 [ 31.214514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215250] [ 31.215490] Freed by task 210: [ 31.215922] kasan_save_stack+0x22/0x50 [ 31.216491] kasan_set_track+0x25/0x30 [ 31.217041] kasan_save_free_info+0x2b/0x50 [ 31.217640] __kasan_slab_free+0x10a/0x190 [ 31.218231] kmem_cache_free+0x10d/0x4d0 [ 31.218793] rcu_core+0x8c8/0x2860 [ 31.219293] __do_softirq+0x1b7/0x7d4 [ 31.219825] [ 31.220060] Last potentially related work creation: [ 31.220703] kasan_save_stack+0x22/0x50 [ 31.221260] __kasan_record_aux_stack+0x8e/0xa0 [ 31.221898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.222609] remove_vma+0x139/0x170 [ 31.223121] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.223734] do_vmi_munmap+0x1f1/0x2b0 [ 31.224272] __vm_munmap+0x138/0x3a0 [ 31.224791] __x64_sys_munmap+0x59/0x80 [ 31.225336] do_syscall_64+0x3f/0x90 [ 31.225868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226582] [ 31.226818] The buggy address belongs to the object at ffff8880197bee80 [ 31.226818] which belongs to the cache vm_area_struct of size 168 [ 31.228443] The buggy address is located 88 bytes inside of [ 31.228443] freed 168-byte region [ffff8880197bee80, ffff8880197bef28) [ 31.229999] [ 31.230232] The buggy address belongs to the physical page: [ 31.230956] page:00000000843c3746 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197be [ 31.232180] memcg:ffff888016a3c801 [ 31.232658] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.233368] page_type: 0xffffffff() [ 31.233870] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.234890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a3c801 [ 31.235906] page dumped because: kasan: bad access detected [ 31.236634] [ 31.236870] Memory state around the buggy address: [ 31.237510] ffff8880197bed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.238460] ffff8880197bee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.239414] >ffff8880197bee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.240361] ^ [ 31.241163] ffff8880197bef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.242109] ffff8880197bef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.243064] ================================================================== [ 31.244130] Disabling lock debugging due to kernel taint [ 32.842150] BUG: Bad rss-counter state mm:00000000aa4df9d3 type:MM_FILEPAGES val:33 [ 32.843475] BUG: Bad rss-counter state mm:00000000aa4df9d3 type:MM_ANONPAGES val:22 [ 33.266839] BUG: Bad rss-counter state mm:00000000d537eb43 type:MM_FILEPAGES val:33 [ 33.267772] BUG: Bad rss-counter state mm:00000000d537eb43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36969' (ECDSA) to the list of known hosts. 2023/06/21 02:02:11 fuzzer started 2023/06/21 02:02:11 dialing manager at localhost:36067 2023/06/21 02:02:11 checking machine... 2023/06/21 02:02:11 checking revisions... [ 33.950845] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:02:11 testing simple program... [ 34.009328] cgroup: Unknown subsys name 'net' [ 34.047101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:02:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007ff20daf2900 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=00007ff20e0a7650 CR3=000000000e3a0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000018e10 RCX=ffffffff8170aaaf RDX=ffff888015c08000 RSI=0000000000000000 RDI=0000000000000000 RBP=1ffff11002b80f6d RSP=ffff888015c07b58 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800effa828 R13=00007f921ab13000 R14=8000000018e10025 R15=0000000000000000 RIP=ffffffff814c0404 RFL=00000212 [----A--] 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 00007f921b617900 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=00007f921ab135b0 CR3=000000000cb14000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b611d00d8014955200000000000ae988 XMM05=874a048643e3691100000000001330f8 XMM06=4fda316b135da52b0000000000131ee8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000