syzkaller login: [ 44.025966] BUG: Bad rss-counter state mm:00000000ec7a5164 type:MM_FILEPAGES val:33 [ 44.026993] BUG: Bad rss-counter state mm:00000000ec7a5164 type:MM_ANONPAGES val:22 [ 44.192314] ================================================================== [ 44.193242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.194202] Read of size 8 at addr ffff88801a318df0 by task sshd/219 [ 44.194978] [ 44.195200] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.196225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.197236] Call Trace: [ 44.197557] [ 44.197846] dump_stack_lvl+0x91/0xf0 [ 44.198359] print_report+0xcc/0x620 [ 44.198849] ? __virt_addr_valid+0x102/0x340 [ 44.199431] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.200055] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.200674] kasan_report+0xbe/0xf0 [ 44.201158] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.201793] vma_interval_tree_remove+0xc75/0xec0 [ 44.202391] vma_prepare+0xc54/0x11a0 [ 44.202876] __split_vma+0x5af/0x950 [ 44.203350] ? __pfx___split_vma+0x10/0x10 [ 44.203881] ? find_held_lock+0x2c/0x110 [ 44.204409] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.204970] ? lock_is_held_type+0x9f/0x120 [ 44.205537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.206141] ? mtree_range_walk+0x632/0x900 [ 44.206693] ? mas_walk+0x5c7/0x7c0 [ 44.207168] do_vmi_munmap+0x1f1/0x2b0 [ 44.207669] mmap_region+0x1f9/0x2660 [ 44.208150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.208671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.209389] ? __pfx_lock_acquire+0x10/0x10 [ 44.209934] ? __pfx_mmap_region+0x10/0x10 [ 44.210459] ? security_mmap_addr+0x7d/0xa0 [ 44.211000] ? get_unmapped_area+0x1f5/0x3f0 [ 44.211550] do_mmap+0x854/0xf00 [ 44.211994] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.212490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.213057] ksys_mmap_pgoff+0x3af/0x500 [ 44.213579] do_syscall_64+0x3f/0x90 [ 44.214056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.214700] RIP: 0033:0x7fcbcbb81d82 [ 44.215161] 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 [ 44.217277] RSP: 002b:00007ffd73399e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.218184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbcbb81d82 [ 44.219029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbcafbb000 [ 44.219872] RBP: 00007fcbcafbb000 R08: 0000000000000009 R09: 0000000000001000 [ 44.220714] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a35e22cd90 [ 44.221579] R13: 00007ffd73399e70 R14: 00007ffd73399ea0 R15: 00007ffd7339a200 [ 44.222445] [ 44.222742] [ 44.222958] Allocated by task 212: [ 44.223390] kasan_save_stack+0x22/0x50 [ 44.223906] kasan_set_track+0x25/0x30 [ 44.224401] __kasan_slab_alloc+0x59/0x70 [ 44.224925] kmem_cache_alloc+0x16b/0x370 [ 44.225452] vm_area_dup+0x20/0x160 [ 44.225908] __split_vma+0x170/0x950 [ 44.226379] split_vma+0xc6/0x110 [ 44.226835] mprotect_fixup+0x8d2/0xb30 [ 44.227373] do_mprotect_pkey+0x87e/0xd40 [ 44.227919] __x64_sys_mprotect+0x78/0xc0 [ 44.228472] do_syscall_64+0x3f/0x90 [ 44.228975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.229665] [ 44.229892] Freed by task 19: [ 44.230294] kasan_save_stack+0x22/0x50 [ 44.230820] kasan_set_track+0x25/0x30 [ 44.231342] kasan_save_free_info+0x2b/0x50 [ 44.231905] __kasan_slab_free+0x10a/0x190 [ 44.232466] kmem_cache_free+0x10d/0x4d0 [ 44.232999] rcu_core+0x8c8/0x2860 [ 44.233481] __do_softirq+0x1b7/0x7d4 [ 44.233978] [ 44.234202] Last potentially related work creation: [ 44.234816] kasan_save_stack+0x22/0x50 [ 44.235342] __kasan_record_aux_stack+0x8e/0xa0 [ 44.235949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.236626] remove_vma+0x139/0x170 [ 44.237166] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.237765] do_vmi_munmap+0x1f1/0x2b0 [ 44.238278] __vm_munmap+0x138/0x3a0 [ 44.238773] __x64_sys_munmap+0x59/0x80 [ 44.239291] do_syscall_64+0x3f/0x90 [ 44.239790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.240459] [ 44.240687] The buggy address belongs to the object at ffff88801a318d98 [ 44.240687] which belongs to the cache vm_area_struct of size 168 [ 44.242274] The buggy address is located 88 bytes inside of [ 44.242274] freed 168-byte region [ffff88801a318d98, ffff88801a318e40) [ 44.243771] [ 44.244003] The buggy address belongs to the physical page: [ 44.244703] page:000000003790eb83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a318 [ 44.245875] memcg:ffff888016e69c01 [ 44.246318] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.247003] page_type: 0xffffffff() [ 44.247486] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.248457] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e69c01 [ 44.249433] page dumped because: kasan: bad access detected [ 44.250136] [ 44.250365] Memory state around the buggy address: [ 44.250976] ffff88801a318c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 44.251892] ffff88801a318d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 44.252806] >ffff88801a318d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 44.253722] ^ [ 44.254589] ffff88801a318e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 44.255490] ffff88801a318e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.256400] ================================================================== [ 44.257397] Disabling lock debugging due to kernel taint [ 46.392458] BUG: Bad rss-counter state mm:000000003e0126c2 type:MM_FILEPAGES val:33 [ 46.393652] BUG: Bad rss-counter state mm:000000003e0126c2 type:MM_ANONPAGES val:22 [ 46.874469] BUG: Bad rss-counter state mm:000000003ce24148 type:MM_FILEPAGES val:33 [ 46.875458] BUG: Bad rss-counter state mm:000000003ce24148 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57038' (ECDSA) to the list of known hosts. 2023/06/20 05:34:40 fuzzer started 2023/06/20 05:34:40 dialing manager at localhost:44161 2023/06/20 05:34:40 checking machine... 2023/06/20 05:34:40 checking revisions... [ 47.595309] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:34:40 testing simple program... [ 47.638185] cgroup: Unknown subsys name 'net' [ 47.700301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:34:26 Registers: info registers vcpu 0 RAX=ffff888019dca068 RBX=ffff88800ee3b068 RCX=1ffff11003417544 RDX=dffffc0000000000 RSI=ffff888019b862b0 RDI=ffff88800ee3b098 RBP=ffff88800ee3b078 RSP=ffff888015c4f5f8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888019b86178 R13=0000000000000000 R14=ffff888016c7e3d8 R15=ffff888016c7e390 RIP=ffffffff8184754c RFL=00000046 [---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 00007f88ca4b5900 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=00007f88c9922570 CR3=000000000d492000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3e19a8dedb15d5a000000000000ae988 XMM05=a49ff58d1a522b6b0000000000134f88 XMM06=dfcdbad4f1609c370000000000133e20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffc17051000 CR3=0000000015e5e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000