syzkaller login: [ 30.969389] BUG: Bad rss-counter state mm:00000000b4b60b32 type:MM_FILEPAGES val:33 [ 30.970134] BUG: Bad rss-counter state mm:00000000b4b60b32 type:MM_ANONPAGES val:22 [ 31.097226] ================================================================== [ 31.097925] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.098555] Read of size 8 at addr ffff88800fe89a50 by task sshd/221 [ 31.099092] [ 31.099265] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.099882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.100546] Call Trace: [ 31.100775] [ 31.101000] dump_stack_lvl+0x91/0xf0 [ 31.101712] print_report+0xcc/0x620 [ 31.102057] ? __virt_addr_valid+0x102/0x340 [ 31.102427] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.102853] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.103275] kasan_report+0xbe/0xf0 [ 31.103692] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.104119] vma_interval_tree_remove+0xc75/0xec0 [ 31.104519] vma_prepare+0xc54/0x11a0 [ 31.104846] __split_vma+0x5af/0x950 [ 31.105200] ? __pfx___split_vma+0x10/0x10 [ 31.105551] ? find_held_lock+0x2c/0x110 [ 31.105892] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.106265] ? lock_is_held_type+0x9f/0x120 [ 31.106620] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.107024] ? mtree_range_walk+0x632/0x900 [ 31.107412] ? mas_walk+0x5c7/0x7c0 [ 31.107742] do_vmi_munmap+0x1f1/0x2b0 [ 31.108081] mmap_region+0x1f9/0x2660 [ 31.108395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.108732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.109235] ? __pfx_lock_acquire+0x10/0x10 [ 31.109597] ? __pfx_mmap_region+0x10/0x10 [ 31.109961] ? security_mmap_addr+0x7d/0xa0 [ 31.110321] ? get_unmapped_area+0x1f5/0x3f0 [ 31.110698] do_mmap+0x854/0xf00 [ 31.110997] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.111323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.111714] ksys_mmap_pgoff+0x3af/0x500 [ 31.112062] do_syscall_64+0x3f/0x90 [ 31.112388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.112815] RIP: 0033:0x7fbce11fbd82 [ 31.113114] 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 [ 31.114568] RSP: 002b:00007ffdb438fc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.115148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbce11fbd82 [ 31.115716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbce0635000 [ 31.116293] RBP: 00007fbce0635000 R08: 0000000000000009 R09: 0000000000001000 [ 31.116835] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d19475eec0 [ 31.117422] R13: 00007ffdb438fcb0 R14: 00007ffdb438fce0 R15: 00007ffdb4390040 [ 31.117978] [ 31.118163] [ 31.118305] Allocated by task 214: [ 31.118590] kasan_save_stack+0x22/0x50 [ 31.118947] kasan_set_track+0x25/0x30 [ 31.119265] __kasan_slab_alloc+0x59/0x70 [ 31.119605] kmem_cache_alloc+0x16b/0x370 [ 31.119953] vm_area_dup+0x20/0x160 [ 31.120245] __split_vma+0x170/0x950 [ 31.120544] split_vma+0xc6/0x110 [ 31.120836] mprotect_fixup+0x8d2/0xb30 [ 31.121209] do_mprotect_pkey+0x87e/0xd40 [ 31.121559] __x64_sys_mprotect+0x78/0xc0 [ 31.121888] do_syscall_64+0x3f/0x90 [ 31.122189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122608] [ 31.122784] Freed by task 204: [ 31.123043] kasan_save_stack+0x22/0x50 [ 31.123383] kasan_set_track+0x25/0x30 [ 31.123699] kasan_save_free_info+0x2b/0x50 [ 31.124082] __kasan_slab_free+0x10a/0x190 [ 31.124486] kmem_cache_free+0x10d/0x4d0 [ 31.124880] rcu_core+0x8c8/0x2860 [ 31.125237] __do_softirq+0x1b7/0x7d4 [ 31.125570] [ 31.125719] Last potentially related work creation: [ 31.126166] kasan_save_stack+0x22/0x50 [ 31.126524] __kasan_record_aux_stack+0x8e/0xa0 [ 31.126971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.127381] remove_vma+0x139/0x170 [ 31.127687] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.128087] do_vmi_munmap+0x1f1/0x2b0 [ 31.128420] __vm_munmap+0x138/0x3a0 [ 31.128752] __x64_sys_munmap+0x59/0x80 [ 31.129250] do_syscall_64+0x3f/0x90 [ 31.129641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.130123] [ 31.130275] The buggy address belongs to the object at ffff88800fe899f8 [ 31.130275] which belongs to the cache vm_area_struct of size 168 [ 31.131301] The buggy address is located 88 bytes inside of [ 31.131301] freed 168-byte region [ffff88800fe899f8, ffff88800fe89aa0) [ 31.132249] [ 31.132409] The buggy address belongs to the physical page: [ 31.132889] page:00000000ebfc3322 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe89 [ 31.133701] memcg:ffff88800e607a01 [ 31.133971] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.134384] page_type: 0xffffffff() [ 31.134697] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.135370] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e607a01 [ 31.135995] page dumped because: kasan: bad access detected [ 31.136480] [ 31.136639] Memory state around the buggy address: [ 31.137064] ffff88800fe89900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.137765] ffff88800fe89980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.138322] >ffff88800fe89a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.138911] ^ [ 31.139375] ffff88800fe89a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.140046] ffff88800fe89b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.140626] ================================================================== [ 31.141426] Disabling lock debugging due to kernel taint [ 33.016274] BUG: Bad rss-counter state mm:0000000041f5a581 type:MM_FILEPAGES val:33 [ 33.017356] BUG: Bad rss-counter state mm:0000000041f5a581 type:MM_ANONPAGES val:22 [ 33.457436] BUG: Bad rss-counter state mm:000000003dcb435a type:MM_FILEPAGES val:33 [ 33.458122] BUG: Bad rss-counter state mm:000000003dcb435a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53895' (ECDSA) to the list of known hosts. 2023/06/21 08:57:32 fuzzer started 2023/06/21 08:57:32 dialing manager at localhost:36067 2023/06/21 08:57:32 checking machine... 2023/06/21 08:57:32 checking revisions... [ 33.993315] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:57:32 testing simple program... [ 34.022479] cgroup: Unknown subsys name 'net' [ 34.066861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:31 Registers: info registers vcpu 0 RAX=0000000000010b8d RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000010b9e RSI=0000000000003ad7 RDI=ffffffff860d82bc RBP=ffff88800c4573e0 RSP=ffff88800c457318 R8 =ffffffff860d8256 R9 =ffff88800c4573c8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800c4573e8 R13=ffff88800c4573d0 R14=ffff88800c4573c9 R15=ffff88800c457388 RIP=ffffffff81130861 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 00007f6e9fb38900 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=00007f6ea00ef618 CR3=0000000016ec6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fa5617f4f10 CR3=0000000015eea000 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=2031333a37353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a37353a3830203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000