syzkaller login: [ 32.104260] BUG: Bad rss-counter state mm:00000000ee4597d5 type:MM_FILEPAGES val:33 [ 32.105476] BUG: Bad rss-counter state mm:00000000ee4597d5 type:MM_ANONPAGES val:22 [ 32.148184] ================================================================== [ 32.149101] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.150099] Read of size 8 at addr ffff88800e3366b0 by task sshd/219 [ 32.150858] [ 32.151076] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.151937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.152913] Call Trace: [ 32.153229] [ 32.153541] dump_stack_lvl+0x91/0xf0 [ 32.154031] print_report+0xcc/0x620 [ 32.154519] ? __virt_addr_valid+0x102/0x340 [ 32.155068] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.155690] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156313] kasan_report+0xbe/0xf0 [ 32.156794] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.157416] vma_interval_tree_remove+0xc75/0xec0 [ 32.158038] vma_prepare+0xc54/0x11a0 [ 32.158520] __split_vma+0x5af/0x950 [ 32.158991] ? __pfx___split_vma+0x10/0x10 [ 32.159516] ? find_held_lock+0x2c/0x110 [ 32.160046] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.160614] ? lock_is_held_type+0x9f/0x120 [ 32.161149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.161767] ? mtree_range_walk+0x632/0x900 [ 32.162313] ? mas_walk+0x5c7/0x7c0 [ 32.162793] do_vmi_munmap+0x1f1/0x2b0 [ 32.163284] mmap_region+0x1f9/0x2660 [ 32.163767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.164278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.165009] ? __pfx_lock_acquire+0x10/0x10 [ 32.165560] ? __pfx_mmap_region+0x10/0x10 [ 32.166096] ? security_mmap_addr+0x7d/0xa0 [ 32.166634] ? get_unmapped_area+0x1f5/0x3f0 [ 32.167197] do_mmap+0x854/0xf00 [ 32.167636] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.168130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.168692] ksys_mmap_pgoff+0x3af/0x500 [ 32.169210] do_syscall_64+0x3f/0x90 [ 32.169702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.170353] RIP: 0033:0x7fb3b974dd82 [ 32.170811] 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 [ 32.172948] RSP: 002b:00007fffe92fb948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.173901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3b974dd82 [ 32.174764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb3b8b87000 [ 32.175609] RBP: 00007fb3b8b87000 R08: 0000000000000009 R09: 0000000000001000 [ 32.176465] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572ddf68d90 [ 32.177340] R13: 00007fffe92fb960 R14: 00007fffe92fb990 R15: 00007fffe92fbcf0 [ 32.178225] [ 32.178522] [ 32.178737] Allocated by task 212: [ 32.179172] kasan_save_stack+0x22/0x50 [ 32.179694] kasan_set_track+0x25/0x30 [ 32.180185] __kasan_slab_alloc+0x59/0x70 [ 32.180706] kmem_cache_alloc+0x16b/0x370 [ 32.181230] vm_area_dup+0x20/0x160 [ 32.181692] __split_vma+0x170/0x950 [ 32.182159] split_vma+0xc6/0x110 [ 32.182614] mprotect_fixup+0x8d2/0xb30 [ 32.183121] do_mprotect_pkey+0x87e/0xd40 [ 32.183656] __x64_sys_mprotect+0x78/0xc0 [ 32.184182] do_syscall_64+0x3f/0x90 [ 32.184655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.185307] [ 32.185543] Freed by task 212: [ 32.185938] kasan_save_stack+0x22/0x50 [ 32.186440] kasan_set_track+0x25/0x30 [ 32.186939] kasan_save_free_info+0x2b/0x50 [ 32.187470] __kasan_slab_free+0x10a/0x190 [ 32.188005] kmem_cache_free+0x10d/0x4d0 [ 32.188509] rcu_core+0x8c8/0x2860 [ 32.188959] __do_softirq+0x1b7/0x7d4 [ 32.189439] [ 32.189663] Last potentially related work creation: [ 32.190253] kasan_save_stack+0x22/0x50 [ 32.190753] __kasan_record_aux_stack+0x8e/0xa0 [ 32.191334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.191980] remove_vma+0x139/0x170 [ 32.192433] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.192998] do_vmi_munmap+0x1f1/0x2b0 [ 32.193505] __vm_munmap+0x138/0x3a0 [ 32.193974] __x64_sys_munmap+0x59/0x80 [ 32.194476] do_syscall_64+0x3f/0x90 [ 32.194959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.195610] [ 32.195826] The buggy address belongs to the object at ffff88800e336658 [ 32.195826] which belongs to the cache vm_area_struct of size 168 [ 32.197305] The buggy address is located 88 bytes inside of [ 32.197305] freed 168-byte region [ffff88800e336658, ffff88800e336700) [ 32.198727] [ 32.198943] The buggy address belongs to the physical page: [ 32.199606] page:00000000ddefb773 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe336 [ 32.200699] memcg:ffff888009801501 [ 32.201130] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.201848] page_type: 0xffffffff() [ 32.202301] raw: 0100000000000200 ffff88800879fc80 ffffea0000563100 dead000000000003 [ 32.203227] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009801501 [ 32.204135] page dumped because: kasan: bad access detected [ 32.204793] [ 32.205008] Memory state around the buggy address: [ 32.205616] ffff88800e336580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.206482] ffff88800e336600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.207347] >ffff88800e336680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.208200] ^ [ 32.208786] ffff88800e336700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 32.209655] ffff88800e336780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.210508] ================================================================== [ 32.211524] Disabling lock debugging due to kernel taint [ 34.124311] BUG: Bad rss-counter state mm:00000000a26d1886 type:MM_FILEPAGES val:33 [ 34.125293] BUG: Bad rss-counter state mm:00000000a26d1886 type:MM_ANONPAGES val:22 [ 34.591839] BUG: Bad rss-counter state mm:000000001829c5f1 type:MM_FILEPAGES val:33 [ 34.593465] BUG: Bad rss-counter state mm:000000001829c5f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9503' (ECDSA) to the list of known hosts. 2023/06/20 04:10:24 fuzzer started 2023/06/20 04:10:25 dialing manager at localhost:44161 2023/06/20 04:10:25 checking machine... 2023/06/20 04:10:25 checking revisions... [ 35.284565] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:10:25 testing simple program... [ 35.330270] cgroup: Unknown subsys name 'net' [ 35.383727] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:10:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880087e5800 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000201 RDI=ffffffff83c593d4 RBP=ffff888008e18ec0 RSP=ffff888016adf4a0 R8 =0000000000000000 R9 =ffffed10010fcb05 R10=ffff8880087e582b R11=00000000000b6996 R12=ffff88800d84ba00 R13=ffff8880087e586c R14=00000000ffffffff R15=ffff8880087e59a8 RIP=ffffffff8118db14 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 00007fad0437a900 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=00007fad04931618 CR3=000000000e764000 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=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=00007f70e7589fe0 CR3=00000000147b2000 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=2034323a30313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000