syzkaller login: [ 30.902215] BUG: Bad rss-counter state mm:000000001aa52eb6 type:MM_FILEPAGES val:31 [ 30.903598] BUG: Bad rss-counter state mm:000000001aa52eb6 type:MM_ANONPAGES val:22 [ 31.065956] ================================================================== [ 31.067035] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.068153] Read of size 8 at addr ffff8880145bb798 by task sshd/220 [ 31.069125] [ 31.069351] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.070207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.071193] Call Trace: [ 31.071522] [ 31.071809] dump_stack_lvl+0x91/0xf0 [ 31.072299] print_report+0xcc/0x620 [ 31.072786] ? __virt_addr_valid+0x102/0x340 [ 31.073354] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073978] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074605] kasan_report+0xbe/0xf0 [ 31.075086] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075704] vma_interval_tree_remove+0xc75/0xec0 [ 31.076302] vma_prepare+0xc54/0x11a0 [ 31.076784] __split_vma+0x5af/0x950 [ 31.077251] ? __pfx___split_vma+0x10/0x10 [ 31.077818] ? find_held_lock+0x2c/0x110 [ 31.078339] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.078904] ? lock_is_held_type+0x9f/0x120 [ 31.079450] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.080059] ? mtree_range_walk+0x632/0x900 [ 31.080607] ? mas_walk+0x5c7/0x7c0 [ 31.081082] do_vmi_munmap+0x1f1/0x2b0 [ 31.081588] mmap_region+0x1f9/0x2660 [ 31.082073] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.082584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.083298] ? __pfx_lock_acquire+0x10/0x10 [ 31.083836] ? __pfx_mmap_region+0x10/0x10 [ 31.084371] ? security_mmap_addr+0x7d/0xa0 [ 31.084902] ? get_unmapped_area+0x1f5/0x3f0 [ 31.085477] do_mmap+0x854/0xf00 [ 31.085920] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.086422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.086990] ksys_mmap_pgoff+0x3af/0x500 [ 31.087509] do_syscall_64+0x3f/0x90 [ 31.087999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.088654] RIP: 0033:0x7f97ab0a5d82 [ 31.089116] 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 [ 31.091290] RSP: 002b:00007ffc30a39158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.092215] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97ab0a5d82 [ 31.093076] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97aa4df000 [ 31.093944] RBP: 00007f97aa4df000 R08: 0000000000000009 R09: 0000000000001000 [ 31.094793] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4adb69d90 [ 31.095643] R13: 00007ffc30a39170 R14: 00007ffc30a391a0 R15: 00007ffc30a39500 [ 31.096510] [ 31.096802] [ 31.097019] Allocated by task 213: [ 31.097457] kasan_save_stack+0x22/0x50 [ 31.097965] kasan_set_track+0x25/0x30 [ 31.098459] __kasan_slab_alloc+0x59/0x70 [ 31.098989] kmem_cache_alloc+0x16b/0x370 [ 31.099508] vm_area_dup+0x20/0x160 [ 31.099970] __split_vma+0x170/0x950 [ 31.100432] split_vma+0xc6/0x110 [ 31.100874] mprotect_fixup+0x8d2/0xb30 [ 31.101387] do_mprotect_pkey+0x87e/0xd40 [ 31.101904] __x64_sys_mprotect+0x78/0xc0 [ 31.102427] do_syscall_64+0x3f/0x90 [ 31.102905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103557] [ 31.103771] Freed by task 203: [ 31.104165] kasan_save_stack+0x22/0x50 [ 31.104665] kasan_set_track+0x25/0x30 [ 31.105156] kasan_save_free_info+0x2b/0x50 [ 31.105706] __kasan_slab_free+0x10a/0x190 [ 31.106233] kmem_cache_free+0x10d/0x4d0 [ 31.106737] rcu_core+0x8c8/0x2860 [ 31.107180] __do_softirq+0x1b7/0x7d4 [ 31.107658] [ 31.107873] Last potentially related work creation: [ 31.108460] kasan_save_stack+0x22/0x50 [ 31.108966] __kasan_record_aux_stack+0x8e/0xa0 [ 31.109546] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.110188] remove_vma+0x139/0x170 [ 31.110642] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.111203] do_vmi_munmap+0x1f1/0x2b0 [ 31.111686] __vm_munmap+0x138/0x3a0 [ 31.112157] __x64_sys_munmap+0x59/0x80 [ 31.112651] do_syscall_64+0x3f/0x90 [ 31.113125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.113770] [ 31.113986] The buggy address belongs to the object at ffff8880145bb740 [ 31.113986] which belongs to the cache vm_area_struct of size 168 [ 31.115461] The buggy address is located 88 bytes inside of [ 31.115461] freed 168-byte region [ffff8880145bb740, ffff8880145bb7e8) [ 31.116853] [ 31.117071] The buggy address belongs to the physical page: [ 31.117751] page:0000000034d29b17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145bb [ 31.118834] memcg:ffff888010261101 [ 31.119256] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.119912] page_type: 0xffffffff() [ 31.120365] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.121283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010261101 [ 31.122199] page dumped because: kasan: bad access detected [ 31.122865] [ 31.123081] Memory state around the buggy address: [ 31.123658] ffff8880145bb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.124521] ffff8880145bb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.125392] >ffff8880145bb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.126242] ^ [ 31.126745] ffff8880145bb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.127603] ffff8880145bb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.128453] ================================================================== [ 31.129502] Disabling lock debugging due to kernel taint [ 32.971329] BUG: Bad rss-counter state mm:00000000035300f3 type:MM_FILEPAGES val:33 [ 32.972328] BUG: Bad rss-counter state mm:00000000035300f3 type:MM_ANONPAGES val:22 [ 33.448397] BUG: Bad rss-counter state mm:000000006fc8c0a2 type:MM_FILEPAGES val:33 [ 33.449565] BUG: Bad rss-counter state mm:000000006fc8c0a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56157' (ECDSA) to the list of known hosts. 2023/06/21 05:05:47 fuzzer started 2023/06/21 05:05:47 dialing manager at localhost:36067 2023/06/21 05:05:47 checking machine... 2023/06/21 05:05:47 checking revisions... [ 34.220098] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:05:47 testing simple program... [ 34.265471] cgroup: Unknown subsys name 'net' [ 34.319574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:47 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff81143201 RDX=0000000000000800 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000015c58800 RSP=ffff888018237840 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00676f6c2d766564 R12=0000000000000000 R13=0000000000000800 R14=0000000000000000 R15=ffff888019e4fb40 RIP=ffffffff814c0250 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 00007fe149b2a700 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=00007fa534e55618 CR3=000000000e5f2000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037343a3530 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323533 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f8e173a17f0 CR3=000000000d47e000 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=13d25b0e749c6185644f40c58cee7ea3 XMM02=ec2efd57dc4c00df0000000000119980 XMM03=85586bd41f724a720000000000119a50 XMM04=cf8926f3ab59a97c00000000000ae988 XMM05=f1a505be784045960000000000131ea8 XMM06=4fda316b135da52b0000000000130f48 XMM07=e042d86d42eb936e0000000000121518 XMM08=85586bd41f724a720000000000119a50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000