syzkaller login: [ 43.944322] BUG: Bad rss-counter state mm:0000000045da1301 type:MM_FILEPAGES val:33 [ 43.945435] BUG: Bad rss-counter state mm:0000000045da1301 type:MM_ANONPAGES val:22 [ 44.112339] ================================================================== [ 44.113495] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.114516] Read of size 8 at addr ffff888014300140 by task sshd/221 [ 44.115329] [ 44.115593] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.116537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.117564] Call Trace: [ 44.117906] [ 44.118210] dump_stack_lvl+0x91/0xf0 [ 44.118763] print_report+0xcc/0x620 [ 44.119291] ? __virt_addr_valid+0x102/0x340 [ 44.119905] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.120601] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.121271] kasan_report+0xbe/0xf0 [ 44.121812] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.122542] vma_interval_tree_remove+0xc75/0xec0 [ 44.123228] vma_prepare+0xc54/0x11a0 [ 44.123774] __split_vma+0x5af/0x950 [ 44.124309] ? __pfx___split_vma+0x10/0x10 [ 44.124927] ? find_held_lock+0x2c/0x110 [ 44.125526] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.126170] ? lock_is_held_type+0x9f/0x120 [ 44.126803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.127499] ? mtree_range_walk+0x632/0x900 [ 44.128120] ? mas_walk+0x5c7/0x7c0 [ 44.128651] do_vmi_munmap+0x1f1/0x2b0 [ 44.129197] mmap_region+0x1f9/0x2660 [ 44.129746] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.130320] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.131163] ? __pfx_lock_acquire+0x10/0x10 [ 44.131743] ? __pfx_mmap_region+0x10/0x10 [ 44.132321] ? security_mmap_addr+0x7d/0xa0 [ 44.132894] ? get_unmapped_area+0x1f5/0x3f0 [ 44.133491] do_mmap+0x854/0xf00 [ 44.133958] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.134490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.135080] ksys_mmap_pgoff+0x3af/0x500 [ 44.135621] do_syscall_64+0x3f/0x90 [ 44.136133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.136792] RIP: 0033:0x7fab6d5e4d82 [ 44.137256] 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 [ 44.139513] RSP: 002b:00007ffc684bf418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.140641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab6d5e4d82 [ 44.141538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab6ca1e000 [ 44.142402] RBP: 00007fab6ca1e000 R08: 0000000000000009 R09: 0000000000001000 [ 44.143302] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4a7e69ec0 [ 44.144190] R13: 00007ffc684bf430 R14: 00007ffc684bf460 R15: 00007ffc684bf7c0 [ 44.145069] [ 44.145373] [ 44.145601] Allocated by task 214: [ 44.146058] kasan_save_stack+0x22/0x50 [ 44.146625] kasan_set_track+0x25/0x30 [ 44.147132] __kasan_slab_alloc+0x59/0x70 [ 44.147677] kmem_cache_alloc+0x16b/0x370 [ 44.148212] vm_area_dup+0x20/0x160 [ 44.148686] __split_vma+0x170/0x950 [ 44.149158] split_vma+0xc6/0x110 [ 44.149631] mprotect_fixup+0x8d2/0xb30 [ 44.150141] do_mprotect_pkey+0x87e/0xd40 [ 44.150725] __x64_sys_mprotect+0x78/0xc0 [ 44.151262] do_syscall_64+0x3f/0x90 [ 44.151771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.152461] [ 44.152694] Freed by task 214: [ 44.153102] kasan_save_stack+0x22/0x50 [ 44.153633] kasan_set_track+0x25/0x30 [ 44.154142] kasan_save_free_info+0x2b/0x50 [ 44.154707] __kasan_slab_free+0x10a/0x190 [ 44.155262] kmem_cache_free+0x10d/0x4d0 [ 44.155808] rcu_core+0x8c8/0x2860 [ 44.156267] __do_softirq+0x1b7/0x7d4 [ 44.156765] [ 44.156985] Last potentially related work creation: [ 44.157595] kasan_save_stack+0x22/0x50 [ 44.158116] __kasan_record_aux_stack+0x8e/0xa0 [ 44.158716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.159368] remove_vma+0x139/0x170 [ 44.159847] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.160416] do_vmi_munmap+0x1f1/0x2b0 [ 44.160927] __vm_munmap+0x138/0x3a0 [ 44.161415] __x64_sys_munmap+0x59/0x80 [ 44.161937] do_syscall_64+0x3f/0x90 [ 44.162438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.163116] [ 44.163336] The buggy address belongs to the object at ffff8880143000e8 [ 44.163336] which belongs to the cache vm_area_struct of size 168 [ 44.164869] The buggy address is located 88 bytes inside of [ 44.164869] freed 168-byte region [ffff8880143000e8, ffff888014300190) [ 44.166316] [ 44.166564] The buggy address belongs to the physical page: [ 44.167241] page:0000000050ec0756 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14300 [ 44.168370] memcg:ffff88800fca6a01 [ 44.168837] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.169507] page_type: 0xffffffff() [ 44.169967] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.170925] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fca6a01 [ 44.171857] page dumped because: kasan: bad access detected [ 44.172552] [ 44.172780] Memory state around the buggy address: [ 44.173378] ffff888014300000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.174254] ffff888014300080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 44.175163] >ffff888014300100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.176044] ^ [ 44.176735] ffff888014300180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.177640] ffff888014300200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.178534] ================================================================== [ 44.179626] Disabling lock debugging due to kernel taint [ 46.297015] BUG: Bad rss-counter state mm:00000000f3a1d5e1 type:MM_FILEPAGES val:33 [ 46.298229] BUG: Bad rss-counter state mm:00000000f3a1d5e1 type:MM_ANONPAGES val:22 [ 46.822782] BUG: Bad rss-counter state mm:0000000092c14da9 type:MM_FILEPAGES val:33 [ 46.823960] BUG: Bad rss-counter state mm:0000000092c14da9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59874' (ECDSA) to the list of known hosts. 2023/06/19 23:25:58 fuzzer started 2023/06/19 23:25:58 dialing manager at localhost:44161 2023/06/19 23:25:58 checking machine... 2023/06/19 23:25:58 checking revisions... [ 47.510042] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:25:58 testing simple program... [ 47.562337] cgroup: Unknown subsys name 'net' [ 47.599368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:25:44 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000080000000 RCX=0000000080000100 RDX=1ffff110018cea10 RSI=ffffffff811430dc RDI=ffff88800c675080 RBP=ffff88800c675080 RSP=ffff888008d7fc58 R8 =0000000000000001 R9 =ffffed10018cea12 R10=ffff88800c675093 R11=0000000000000128 R12=0000000000000000 R13=ffffea000038dac0 R14=ffffffff813782a8 R15=ffff88800e36b7e8 RIP=ffffffff814c07f1 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 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=00007f9243cde650 CR3=000000000dcd0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=ffffffff844f88f4 RBX=1ffff11002b84f5b RCX=ffffffff844f89cf RDX=ffff888015b51b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015c27ad8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888008f2a798 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844f89d0 RFL=00000293 [--S-A-C] 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 00007f9243729900 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=00007f9243ce10b0 CR3=000000000dcd0000 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=2038353a35323a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a35323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000