syzkaller login: [ 31.077930] BUG: Bad rss-counter state mm:00000000c271f808 type:MM_FILEPAGES val:33 [ 31.079504] BUG: Bad rss-counter state mm:00000000c271f808 type:MM_ANONPAGES val:22 [ 31.198571] ================================================================== [ 31.199233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.199943] Read of size 8 at addr ffff88800e4e9880 by task sshd/221 [ 31.200541] [ 31.200706] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.201356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.202090] Call Trace: [ 31.202440] [ 31.202655] dump_stack_lvl+0x91/0xf0 [ 31.203027] print_report+0xcc/0x620 [ 31.203397] ? __virt_addr_valid+0x102/0x340 [ 31.203815] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204789] kasan_report+0xbe/0xf0 [ 31.205141] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205569] vma_interval_tree_remove+0xc75/0xec0 [ 31.205982] vma_prepare+0xc54/0x11a0 [ 31.206300] __split_vma+0x5af/0x950 [ 31.206632] ? __pfx___split_vma+0x10/0x10 [ 31.206991] ? find_held_lock+0x2c/0x110 [ 31.207346] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.207725] ? lock_is_held_type+0x9f/0x120 [ 31.208107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.208522] ? mtree_range_walk+0x632/0x900 [ 31.208898] ? mas_walk+0x5c7/0x7c0 [ 31.209213] do_vmi_munmap+0x1f1/0x2b0 [ 31.209541] mmap_region+0x1f9/0x2660 [ 31.209860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.210202] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.210677] ? __pfx_lock_acquire+0x10/0x10 [ 31.211031] ? __pfx_mmap_region+0x10/0x10 [ 31.211382] ? security_mmap_addr+0x7d/0xa0 [ 31.211733] ? get_unmapped_area+0x1f5/0x3f0 [ 31.212096] do_mmap+0x854/0xf00 [ 31.212404] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.212735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213106] ksys_mmap_pgoff+0x3af/0x500 [ 31.213443] do_syscall_64+0x3f/0x90 [ 31.213764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214189] RIP: 0033:0x7fa59899ed82 [ 31.214490] 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 [ 31.215901] RSP: 002b:00007fff886ec0a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.216524] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa59899ed82 [ 31.217096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa597dd8000 [ 31.217651] RBP: 00007fa597dd8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.218213] R10: 0000000000000812 R11: 0000000000000206 R12: 000056163c30dec0 [ 31.218776] R13: 00007fff886ec0c0 R14: 00007fff886ec0f0 R15: 00007fff886ec450 [ 31.219345] [ 31.219539] [ 31.219683] Allocated by task 214: [ 31.219968] kasan_save_stack+0x22/0x50 [ 31.220310] kasan_set_track+0x25/0x30 [ 31.220655] __kasan_slab_alloc+0x59/0x70 [ 31.221001] kmem_cache_alloc+0x16b/0x370 [ 31.221339] vm_area_dup+0x20/0x160 [ 31.221638] __split_vma+0x170/0x950 [ 31.221949] split_vma+0xc6/0x110 [ 31.222239] mprotect_fixup+0x8d2/0xb30 [ 31.222568] do_mprotect_pkey+0x87e/0xd40 [ 31.222914] __x64_sys_mprotect+0x78/0xc0 [ 31.223262] do_syscall_64+0x3f/0x90 [ 31.223576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224008] [ 31.224153] Freed by task 13: [ 31.224425] kasan_save_stack+0x22/0x50 [ 31.224758] kasan_set_track+0x25/0x30 [ 31.225086] kasan_save_free_info+0x2b/0x50 [ 31.225444] __kasan_slab_free+0x10a/0x190 [ 31.225793] kmem_cache_free+0x10d/0x4d0 [ 31.226132] rcu_core+0x8c8/0x2860 [ 31.226427] __do_softirq+0x1b7/0x7d4 [ 31.226746] [ 31.226889] Last potentially related work creation: [ 31.227280] kasan_save_stack+0x22/0x50 [ 31.227615] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228437] remove_vma+0x139/0x170 [ 31.228732] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.229100] do_vmi_munmap+0x1f1/0x2b0 [ 31.229419] __vm_munmap+0x138/0x3a0 [ 31.229728] __x64_sys_munmap+0x59/0x80 [ 31.230059] do_syscall_64+0x3f/0x90 [ 31.230374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230800] [ 31.230941] Second to last potentially related work creation: [ 31.231394] kasan_save_stack+0x22/0x50 [ 31.231731] __kasan_record_aux_stack+0x8e/0xa0 [ 31.232109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.232538] remove_vma+0x139/0x170 [ 31.232839] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.233209] do_vmi_munmap+0x1f1/0x2b0 [ 31.233533] mmap_region+0x1f9/0x2660 [ 31.233848] do_mmap+0x854/0xf00 [ 31.234133] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.234457] ksys_mmap_pgoff+0x3af/0x500 [ 31.234789] do_syscall_64+0x3f/0x90 [ 31.235103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235532] [ 31.235678] The buggy address belongs to the object at ffff88800e4e9828 [ 31.235678] which belongs to the cache vm_area_struct of size 168 [ 31.236672] The buggy address is located 88 bytes inside of [ 31.236672] freed 168-byte region [ffff88800e4e9828, ffff88800e4e98d0) [ 31.237608] [ 31.237750] The buggy address belongs to the physical page: [ 31.238188] page:00000000a07ddc3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4e9 [ 31.238904] memcg:ffff88800e665001 [ 31.239190] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239651] page_type: 0xffffffff() [ 31.239955] raw: 0100000000000200 ffff8880087a0c80 ffffea000038f7c0 dead000000000007 [ 31.240568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e665001 [ 31.241163] page dumped because: kasan: bad access detected [ 31.241601] [ 31.241742] Memory state around the buggy address: [ 31.242123] ffff88800e4e9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.242693] ffff88800e4e9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.243263] >ffff88800e4e9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.243821] ^ [ 31.244092] ffff88800e4e9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.244672] ffff88800e4e9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.245232] ================================================================== [ 31.245908] Disabling lock debugging due to kernel taint [ 33.009325] BUG: Bad rss-counter state mm:0000000014bbcd8b type:MM_FILEPAGES val:33 [ 33.010506] BUG: Bad rss-counter state mm:0000000014bbcd8b type:MM_ANONPAGES val:22 [ 33.397915] BUG: Bad rss-counter state mm:000000008efd52a0 type:MM_FILEPAGES val:33 [ 33.398937] BUG: Bad rss-counter state mm:000000008efd52a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7691' (ECDSA) to the list of known hosts. 2023/06/20 19:41:23 fuzzer started 2023/06/20 19:41:23 dialing manager at localhost:36067 2023/06/20 19:41:23 checking machine... 2023/06/20 19:41:23 checking revisions... [ 34.123451] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:41:23 testing simple program... [ 34.178487] cgroup: Unknown subsys name 'net' [ 34.230405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:41:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=0000563e9ccfb218 CR3=000000001966e000 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=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff852ca2b0 RCX=0000000000000000 RDX=1ffff1100378c940 RSI=ffffffff81f79897 RDI=ffff8880144e1480 RBP=ffff8880144e1000 RSP=ffff88801cdc7d30 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88801cdc7e30 R13=ffff88801bc64a00 R14=ffff8880144e1000 R15=ffff88801928b3c0 RIP=ffffffff81f798e5 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 00007ff17a768900 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=00007ff17ad1d650 CR3=000000001966e000 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=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