syzkaller login: [ 31.096551] BUG: Bad rss-counter state mm:000000004816f8b2 type:MM_FILEPAGES val:33 [ 31.097789] BUG: Bad rss-counter state mm:000000004816f8b2 type:MM_ANONPAGES val:22 [ 31.141577] ================================================================== [ 31.142623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.143798] Read of size 8 at addr ffff888016456798 by task sshd/221 [ 31.144838] [ 31.145093] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.146165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.147271] Call Trace: [ 31.147622] [ 31.147950] dump_stack_lvl+0x91/0xf0 [ 31.148490] print_report+0xcc/0x620 [ 31.149029] ? __virt_addr_valid+0x102/0x340 [ 31.149641] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150342] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.151027] kasan_report+0xbe/0xf0 [ 31.151557] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.152246] vma_interval_tree_remove+0xc75/0xec0 [ 31.152910] vma_prepare+0xc54/0x11a0 [ 31.153437] __split_vma+0x5af/0x950 [ 31.153965] ? __pfx___split_vma+0x10/0x10 [ 31.154579] ? find_held_lock+0x2c/0x110 [ 31.155155] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.155778] ? lock_is_held_type+0x9f/0x120 [ 31.156374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.157046] ? mtree_range_walk+0x632/0x900 [ 31.157657] ? mas_walk+0x5c7/0x7c0 [ 31.158184] do_vmi_munmap+0x1f1/0x2b0 [ 31.158743] mmap_region+0x1f9/0x2660 [ 31.159282] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.159848] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.160635] ? __pfx_lock_acquire+0x10/0x10 [ 31.161224] ? __pfx_mmap_region+0x10/0x10 [ 31.161812] ? security_mmap_addr+0x7d/0xa0 [ 31.162415] ? get_unmapped_area+0x1f5/0x3f0 [ 31.163027] do_mmap+0x854/0xf00 [ 31.163511] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.164059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.164683] ksys_mmap_pgoff+0x3af/0x500 [ 31.165248] do_syscall_64+0x3f/0x90 [ 31.165778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.166517] RIP: 0033:0x7ff183c7cd82 [ 31.167021] 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 [ 31.169388] RSP: 002b:00007ffd1c8b5a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.170385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff183c7cd82 [ 31.171237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1830b6000 [ 31.172091] RBP: 00007ff1830b6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.172951] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594d9ea0d90 [ 31.173802] R13: 00007ffd1c8b5a60 R14: 00007ffd1c8b5a90 R15: 00007ffd1c8b5df0 [ 31.174684] [ 31.174989] [ 31.175210] Allocated by task 214: [ 31.175643] kasan_save_stack+0x22/0x50 [ 31.176157] kasan_set_track+0x25/0x30 [ 31.176654] __kasan_slab_alloc+0x59/0x70 [ 31.177187] kmem_cache_alloc+0x16b/0x370 [ 31.177711] vm_area_dup+0x20/0x160 [ 31.178175] __split_vma+0x170/0x950 [ 31.178656] split_vma+0xc6/0x110 [ 31.179105] mprotect_fixup+0x8d2/0xb30 [ 31.179613] do_mprotect_pkey+0x87e/0xd40 [ 31.180141] __x64_sys_mprotect+0x78/0xc0 [ 31.180665] do_syscall_64+0x3f/0x90 [ 31.181149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181800] [ 31.182026] Freed by task 214: [ 31.182440] kasan_save_stack+0x22/0x50 [ 31.182956] kasan_set_track+0x25/0x30 [ 31.183503] kasan_save_free_info+0x2b/0x50 [ 31.184090] __kasan_slab_free+0x10a/0x190 [ 31.184676] kmem_cache_free+0x10d/0x4d0 [ 31.185239] rcu_core+0x8c8/0x2860 [ 31.185726] __do_softirq+0x1b7/0x7d4 [ 31.186263] [ 31.186546] Last potentially related work creation: [ 31.187194] kasan_save_stack+0x22/0x50 [ 31.187754] __kasan_record_aux_stack+0x8e/0xa0 [ 31.188389] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.189097] remove_vma+0x139/0x170 [ 31.189598] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.190240] do_vmi_munmap+0x1f1/0x2b0 [ 31.190791] __vm_munmap+0x138/0x3a0 [ 31.191317] __x64_sys_munmap+0x59/0x80 [ 31.191871] do_syscall_64+0x3f/0x90 [ 31.192395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193104] [ 31.193341] The buggy address belongs to the object at ffff888016456740 [ 31.193341] which belongs to the cache vm_area_struct of size 168 [ 31.194980] The buggy address is located 88 bytes inside of [ 31.194980] freed 168-byte region [ffff888016456740, ffff8880164567e8) [ 31.196547] [ 31.196782] The buggy address belongs to the physical page: [ 31.197517] page:000000004f7577f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16456 [ 31.198745] memcg:ffff88800ddf1201 [ 31.199215] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.199989] page_type: 0xffffffff() [ 31.200486] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.201506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddf1201 [ 31.202528] page dumped because: kasan: bad access detected [ 31.203258] [ 31.203495] Memory state around the buggy address: [ 31.204140] ffff888016456680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.205087] ffff888016456700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.206032] >ffff888016456780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.206985] ^ [ 31.207532] ffff888016456800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.208480] ffff888016456880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.209425] ================================================================== [ 31.210488] Disabling lock debugging due to kernel taint [ 33.209715] BUG: Bad rss-counter state mm:000000005e212e66 type:MM_FILEPAGES val:33 [ 33.211616] BUG: Bad rss-counter state mm:000000005e212e66 type:MM_ANONPAGES val:22 [ 33.680426] BUG: Bad rss-counter state mm:0000000051f3844a type:MM_FILEPAGES val:33 [ 33.681622] BUG: Bad rss-counter state mm:0000000051f3844a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30770' (ECDSA) to the list of known hosts. 2023/06/21 02:24:31 fuzzer started 2023/06/21 02:24:32 dialing manager at localhost:36067 2023/06/21 02:24:32 checking machine... 2023/06/21 02:24:32 checking revisions... [ 34.414431] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:24:32 testing simple program... [ 34.460028] cgroup: Unknown subsys name 'net' [ 34.503412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:24:31 Registers: info registers vcpu 0 RAX=ffff888015be7c00 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800c503680 RSI=ffffffff8162e079 RDI=0000000000000005 RBP=ffff888019a7c048 RSP=ffff888015be79f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000001 R14=ffff888015be7c00 R15=dffffc0000000000 RIP=ffffffff8162e07e 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 00007f7c2ee62900 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=00007ffc4f65a000 CR3=000000000e358000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fdd15564e60 CR3=000000000cbcc000 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=2031333a34323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000