syzkaller login: [ 36.060103] BUG: Bad rss-counter state mm:00000000e225b005 type:MM_FILEPAGES val:33 [ 36.061335] BUG: Bad rss-counter state mm:00000000e225b005 type:MM_ANONPAGES val:22 [ 36.096912] ================================================================== [ 36.097871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.098890] Read of size 8 at addr ffff88800fdf7d08 by task sshd/219 [ 36.099671] [ 36.099890] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.100763] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.101740] Call Trace: [ 36.102063] [ 36.102349] dump_stack_lvl+0x91/0xf0 [ 36.102847] print_report+0xcc/0x620 [ 36.103401] ? __virt_addr_valid+0x102/0x340 [ 36.103966] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.104592] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.105220] kasan_report+0xbe/0xf0 [ 36.105698] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.106328] vma_interval_tree_remove+0xc75/0xec0 [ 36.106935] vma_prepare+0xc54/0x11a0 [ 36.107432] __split_vma+0x5af/0x950 [ 36.107924] ? __pfx___split_vma+0x10/0x10 [ 36.108471] ? find_held_lock+0x2c/0x110 [ 36.109002] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.109531] ? lock_is_held_type+0x9f/0x120 [ 36.110042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.110617] ? mtree_range_walk+0x632/0x900 [ 36.111140] ? mas_walk+0x5c7/0x7c0 [ 36.111618] do_vmi_munmap+0x1f1/0x2b0 [ 36.112085] mmap_region+0x1f9/0x2660 [ 36.112557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.113094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.113824] ? __pfx_lock_acquire+0x10/0x10 [ 36.114378] ? __pfx_mmap_region+0x10/0x10 [ 36.114949] ? security_mmap_addr+0x7d/0xa0 [ 36.115515] ? get_unmapped_area+0x1f5/0x3f0 [ 36.116072] do_mmap+0x854/0xf00 [ 36.116518] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.117022] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.117586] ksys_mmap_pgoff+0x3af/0x500 [ 36.118128] do_syscall_64+0x3f/0x90 [ 36.118619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.119280] RIP: 0033:0x7fb164990d82 [ 36.119741] 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 [ 36.121880] RSP: 002b:00007ffd60bc8d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.122801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb164990d82 [ 36.123669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb163dca000 [ 36.124533] RBP: 00007fb163dca000 R08: 0000000000000009 R09: 0000000000001000 [ 36.125382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560030e17b20 [ 36.126243] R13: 00007ffd60bc8d70 R14: 00007ffd60bc8da0 R15: 00007ffd60bc9100 [ 36.127107] [ 36.127409] [ 36.127626] Allocated by task 212: [ 36.128054] kasan_save_stack+0x22/0x50 [ 36.128560] kasan_set_track+0x25/0x30 [ 36.129057] __kasan_slab_alloc+0x59/0x70 [ 36.129579] kmem_cache_alloc+0x16b/0x370 [ 36.130098] vm_area_dup+0x20/0x160 [ 36.130552] __split_vma+0x170/0x950 [ 36.131022] split_vma+0xc6/0x110 [ 36.131476] mprotect_fixup+0x8d2/0xb30 [ 36.131985] do_mprotect_pkey+0x87e/0xd40 [ 36.132511] __x64_sys_mprotect+0x78/0xc0 [ 36.133036] do_syscall_64+0x3f/0x90 [ 36.133512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.134166] [ 36.134384] Freed by task 212: [ 36.134776] kasan_save_stack+0x22/0x50 [ 36.135300] kasan_set_track+0x25/0x30 [ 36.135799] kasan_save_free_info+0x2b/0x50 [ 36.136342] __kasan_slab_free+0x10a/0x190 [ 36.136880] kmem_cache_free+0x10d/0x4d0 [ 36.137391] rcu_core+0x8c8/0x2860 [ 36.137834] __do_softirq+0x1b7/0x7d4 [ 36.138319] [ 36.138535] Last potentially related work creation: [ 36.139134] kasan_save_stack+0x22/0x50 [ 36.139645] __kasan_record_aux_stack+0x8e/0xa0 [ 36.140222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.140873] remove_vma+0x139/0x170 [ 36.141325] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.141882] do_vmi_munmap+0x1f1/0x2b0 [ 36.142380] __vm_munmap+0x138/0x3a0 [ 36.142848] __x64_sys_munmap+0x59/0x80 [ 36.143362] do_syscall_64+0x3f/0x90 [ 36.143837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.144483] [ 36.144702] Second to last potentially related work creation: [ 36.145389] kasan_save_stack+0x22/0x50 [ 36.145895] __kasan_record_aux_stack+0x8e/0xa0 [ 36.146478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.147123] remove_vma+0x139/0x170 [ 36.147587] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.148147] do_vmi_munmap+0x1f1/0x2b0 [ 36.148638] mmap_region+0x1f9/0x2660 [ 36.149125] do_mmap+0x854/0xf00 [ 36.149557] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.150049] ksys_mmap_pgoff+0x3af/0x500 [ 36.150555] do_syscall_64+0x3f/0x90 [ 36.151041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.151696] [ 36.151914] The buggy address belongs to the object at ffff88800fdf7cb0 [ 36.151914] which belongs to the cache vm_area_struct of size 168 [ 36.153395] The buggy address is located 88 bytes inside of [ 36.153395] freed 168-byte region [ffff88800fdf7cb0, ffff88800fdf7d58) [ 36.154814] [ 36.155036] The buggy address belongs to the physical page: [ 36.155717] page:0000000058d2156b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdf7 [ 36.156804] memcg:ffff88800e2ffc01 [ 36.157231] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.157883] page_type: 0xffffffff() [ 36.158330] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 36.159261] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2ffc01 [ 36.160169] page dumped because: kasan: bad access detected [ 36.160840] [ 36.161062] Memory state around the buggy address: [ 36.161646] ffff88800fdf7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.162505] ffff88800fdf7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.163356] >ffff88800fdf7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.164213] ^ [ 36.164653] ffff88800fdf7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.165511] ffff88800fdf7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.166367] ================================================================== [ 36.167454] Disabling lock debugging due to kernel taint [ 37.997589] BUG: Bad rss-counter state mm:00000000324190a3 type:MM_FILEPAGES val:33 [ 37.998774] BUG: Bad rss-counter state mm:00000000324190a3 type:MM_ANONPAGES val:22 [ 38.470885] BUG: Bad rss-counter state mm:00000000df406d92 type:MM_FILEPAGES val:33 [ 38.472077] BUG: Bad rss-counter state mm:00000000df406d92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41001' (ECDSA) to the list of known hosts. 2023/06/20 14:34:15 fuzzer started 2023/06/20 14:34:15 dialing manager at localhost:36067 2023/06/20 14:34:15 checking machine... 2023/06/20 14:34:15 checking revisions... [ 39.164231] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:34:15 testing simple program... [ 39.208897] cgroup: Unknown subsys name 'net' [ 39.244806] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:34:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014217880 RCX=0000000000000006 RDX=1ffff110016c1688 RSI=ffffffff844f9eba RDI=0000000000000007 RBP=0000000000002903 RSP=ffff8880142177c0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffff88800b60b440 R13=0000000000000025 R14=0000000000002903 R15=ffff8880142179a0 RIP=ffffffff844f9f13 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 00007f933aea7900 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=00007f933a3c6000 CR3=000000000c656000 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=00000000000aea281e5e28b2c9eb9a38 XMM01=00000000000aec68d3fdd5f48436fbd7 XMM02=00000000000f7e588cdec34d38af4c0a XMM03=00000000000f8318693bd129e125714a XMM04=1e5e28b2c9eb9a3800000000000ae988 XMM05=f22b1fbf5e9969d20000000000133ed0 XMM06=dfcdbad4f1609c3700000000001329f8 XMM07=fb795ef6d65770560000000000121bb8 XMM08=2c67c8bc2e329bc3000000000011dff0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000877fc012 RCX=ffffffff8219d573 RDX=ffff888015f49b40 RSI=0000000000000000 RDI=0000000000000006 RBP=000000000000000f RSP=ffff88800ed6f548 R8 =0000000000000006 R9 =000000000000000f R10=000000000000000d R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2d80 R14=000000000000000d R15=ffff88801722bde8 RIP=ffffffff814c027c 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 00007f2922102700 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=00007f15b4b57618 CR3=000000000c5f0000 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=2035313a34333a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34333a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000