syzkaller login: [ 32.300392] BUG: Bad rss-counter state mm:000000000a2d6d05 type:MM_FILEPAGES val:33 [ 32.301678] BUG: Bad rss-counter state mm:000000000a2d6d05 type:MM_ANONPAGES val:22 [ 32.472715] ================================================================== [ 32.473688] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.474682] Read of size 8 at addr ffff88800969fa50 by task sshd/221 [ 32.475610] [ 32.475843] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.476787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.477840] Call Trace: [ 32.478184] [ 32.478485] dump_stack_lvl+0x91/0xf0 [ 32.479008] print_report+0xcc/0x620 [ 32.479525] ? __virt_addr_valid+0x102/0x340 [ 32.480130] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.480786] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.481438] kasan_report+0xbe/0xf0 [ 32.481951] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.482632] vma_interval_tree_remove+0xc75/0xec0 [ 32.483320] vma_prepare+0xc54/0x11a0 [ 32.483845] __split_vma+0x5af/0x950 [ 32.484384] ? __pfx___split_vma+0x10/0x10 [ 32.484961] ? find_held_lock+0x2c/0x110 [ 32.485542] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.486164] ? lock_is_held_type+0x9f/0x120 [ 32.486752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.487425] ? mtree_range_walk+0x632/0x900 [ 32.488036] ? mas_walk+0x5c7/0x7c0 [ 32.488561] do_vmi_munmap+0x1f1/0x2b0 [ 32.489095] mmap_region+0x1f9/0x2660 [ 32.489623] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.490182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.490960] ? __pfx_lock_acquire+0x10/0x10 [ 32.491547] ? __pfx_mmap_region+0x10/0x10 [ 32.492138] ? security_mmap_addr+0x7d/0xa0 [ 32.492726] ? get_unmapped_area+0x1f5/0x3f0 [ 32.493333] do_mmap+0x854/0xf00 [ 32.493819] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.494361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.494979] ksys_mmap_pgoff+0x3af/0x500 [ 32.495538] do_syscall_64+0x3f/0x90 [ 32.496082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.496795] RIP: 0033:0x7f95ac88cd82 [ 32.497296] 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 [ 32.499607] RSP: 002b:00007ffc170bc4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.500623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95ac88cd82 [ 32.501560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95abcc6000 [ 32.502492] RBP: 00007f95abcc6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.503431] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e1e851d90 [ 32.504390] R13: 00007ffc170bc4e0 R14: 00007ffc170bc510 R15: 00007ffc170bc870 [ 32.505326] [ 32.505646] [ 32.505880] Allocated by task 214: [ 32.506356] kasan_save_stack+0x22/0x50 [ 32.506909] kasan_set_track+0x25/0x30 [ 32.507458] __kasan_slab_alloc+0x59/0x70 [ 32.508033] kmem_cache_alloc+0x16b/0x370 [ 32.508601] vm_area_dup+0x20/0x160 [ 32.509100] __split_vma+0x170/0x950 [ 32.509611] split_vma+0xc6/0x110 [ 32.510095] mprotect_fixup+0x8d2/0xb30 [ 32.510654] do_mprotect_pkey+0x87e/0xd40 [ 32.511230] __x64_sys_mprotect+0x78/0xc0 [ 32.511798] do_syscall_64+0x3f/0x90 [ 32.512321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.513030] [ 32.513272] Freed by task 214: [ 32.513697] kasan_save_stack+0x22/0x50 [ 32.514246] kasan_set_track+0x25/0x30 [ 32.514789] kasan_save_free_info+0x2b/0x50 [ 32.515366] __kasan_slab_free+0x10a/0x190 [ 32.515950] kmem_cache_free+0x10d/0x4d0 [ 32.516539] rcu_core+0x8c8/0x2860 [ 32.517028] __do_softirq+0x1b7/0x7d4 [ 32.517554] [ 32.517790] Last potentially related work creation: [ 32.518441] kasan_save_stack+0x22/0x50 [ 32.518987] __kasan_record_aux_stack+0x8e/0xa0 [ 32.519614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.520317] remove_vma+0x139/0x170 [ 32.520808] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.521445] do_vmi_munmap+0x1f1/0x2b0 [ 32.521976] __vm_munmap+0x138/0x3a0 [ 32.522495] __x64_sys_munmap+0x59/0x80 [ 32.523062] do_syscall_64+0x3f/0x90 [ 32.523570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.524272] [ 32.524503] The buggy address belongs to the object at ffff88800969f9f8 [ 32.524503] which belongs to the cache vm_area_struct of size 168 [ 32.526093] The buggy address is located 88 bytes inside of [ 32.526093] freed 168-byte region [ffff88800969f9f8, ffff88800969faa0) [ 32.527608] [ 32.527838] The buggy address belongs to the physical page: [ 32.528558] page:00000000ceb07d98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x969f [ 32.529712] memcg:ffff888009915201 [ 32.530170] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.530856] page_type: 0xffffffff() [ 32.531333] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.532334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009915201 [ 32.533337] page dumped because: kasan: bad access detected [ 32.534062] [ 32.534300] Memory state around the buggy address: [ 32.534941] ffff88800969f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.535891] ffff88800969f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.536854] >ffff88800969fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.537797] ^ [ 32.538567] ffff88800969fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.539516] ffff88800969fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.540464] ================================================================== [ 32.541713] Disabling lock debugging due to kernel taint [ 34.619789] BUG: Bad rss-counter state mm:00000000e6f423bf type:MM_FILEPAGES val:33 [ 34.620979] BUG: Bad rss-counter state mm:00000000e6f423bf type:MM_ANONPAGES val:22 [ 35.025713] BUG: Bad rss-counter state mm:00000000436211cb type:MM_FILEPAGES val:33 [ 35.026863] BUG: Bad rss-counter state mm:00000000436211cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21095' (ECDSA) to the list of known hosts. 2023/06/20 04:58:50 fuzzer started 2023/06/20 04:58:51 dialing manager at localhost:44161 2023/06/20 04:58:51 checking machine... 2023/06/20 04:58:51 checking revisions... [ 35.756004] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:58:51 testing simple program... [ 35.800943] cgroup: Unknown subsys name 'net' [ 35.853115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:58:48 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880100d9400 RCX=0000000000000000 RDX=ffff888014799b40 RSI=ffffffff8449f0a4 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88801475fcc0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=ffff8880100d9400 R13=ffff88801475fe70 R14=ffffffffffffffff R15=1ffff110028ebfaf RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb2115fd900 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=00007fb210a38cc0 CR3=0000000014568000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c5f9a7debbe1404200000000000ae988 XMM05=d2924bc6d794352f0000000000135318 XMM06=c291bd5c70af25b90000000000134108 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863dc590 RDX=1ffff1100d9e135c RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff863dc594 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000091af6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801467f9c0 R15=ffff88806cf09a98 RIP=ffffffff811310af 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 00007f97416a2900 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=00007f9741c59618 CR3=000000000c9fa000 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=2030353a38353a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a38353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000