syzkaller login: [ 30.821224] BUG: Bad rss-counter state mm:00000000e060f468 type:MM_FILEPAGES val:33 [ 30.822014] BUG: Bad rss-counter state mm:00000000e060f468 type:MM_ANONPAGES val:22 [ 30.984913] ================================================================== [ 30.985839] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.986780] Read of size 8 at addr ffff888017f0ea50 by task sshd/220 [ 30.987562] [ 30.987776] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.988802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.989845] Call Trace: [ 30.990162] [ 30.990453] dump_stack_lvl+0x91/0xf0 [ 30.990955] print_report+0xcc/0x620 [ 30.991480] ? __virt_addr_valid+0x102/0x340 [ 30.992082] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.992698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.993325] kasan_report+0xbe/0xf0 [ 30.993797] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994416] vma_interval_tree_remove+0xc75/0xec0 [ 30.995025] vma_prepare+0xc54/0x11a0 [ 30.995522] __split_vma+0x5af/0x950 [ 30.995998] ? __pfx___split_vma+0x10/0x10 [ 30.996532] ? find_held_lock+0x2c/0x110 [ 30.997054] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.997630] ? lock_is_held_type+0x9f/0x120 [ 30.998171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.998783] ? mtree_range_walk+0x632/0x900 [ 30.999358] ? mas_walk+0x5c7/0x7c0 [ 30.999835] do_vmi_munmap+0x1f1/0x2b0 [ 31.000326] mmap_region+0x1f9/0x2660 [ 31.000812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.001333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.002046] ? __pfx_lock_acquire+0x10/0x10 [ 31.002583] ? __pfx_mmap_region+0x10/0x10 [ 31.003121] ? security_mmap_addr+0x7d/0xa0 [ 31.003664] ? get_unmapped_area+0x1f5/0x3f0 [ 31.004215] do_mmap+0x854/0xf00 [ 31.004660] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.005156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.005723] ksys_mmap_pgoff+0x3af/0x500 [ 31.006263] do_syscall_64+0x3f/0x90 [ 31.006743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.007432] RIP: 0033:0x7f149ad59d82 [ 31.007899] 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 [ 31.010043] RSP: 002b:00007fff2ea505d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.010961] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f149ad59d82 [ 31.011825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f149a193000 [ 31.012672] RBP: 00007f149a193000 R08: 0000000000000009 R09: 0000000000001000 [ 31.013513] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565abb8cf60 [ 31.014382] R13: 00007fff2ea505f0 R14: 00007fff2ea50620 R15: 00007fff2ea50980 [ 31.015247] [ 31.015540] [ 31.015755] Allocated by task 213: [ 31.016188] kasan_save_stack+0x22/0x50 [ 31.016691] kasan_set_track+0x25/0x30 [ 31.017183] __kasan_slab_alloc+0x59/0x70 [ 31.017704] kmem_cache_alloc+0x16b/0x370 [ 31.018216] vm_area_dup+0x20/0x160 [ 31.018669] __split_vma+0x170/0x950 [ 31.019149] split_vma+0xc6/0x110 [ 31.019590] mprotect_fixup+0x8d2/0xb30 [ 31.020090] do_mprotect_pkey+0x87e/0xd40 [ 31.020614] __x64_sys_mprotect+0x78/0xc0 [ 31.021132] do_syscall_64+0x3f/0x90 [ 31.021610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022250] [ 31.022464] Freed by task 213: [ 31.022859] kasan_save_stack+0x22/0x50 [ 31.023370] kasan_set_track+0x25/0x30 [ 31.023864] kasan_save_free_info+0x2b/0x50 [ 31.024397] __kasan_slab_free+0x10a/0x190 [ 31.024935] kmem_cache_free+0x10d/0x4d0 [ 31.025438] rcu_core+0x8c8/0x2860 [ 31.025888] __do_softirq+0x1b7/0x7d4 [ 31.026363] [ 31.026577] Last potentially related work creation: [ 31.027171] kasan_save_stack+0x22/0x50 [ 31.027673] __kasan_record_aux_stack+0x8e/0xa0 [ 31.028252] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.028893] remove_vma+0x139/0x170 [ 31.029346] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.029959] do_vmi_munmap+0x1f1/0x2b0 [ 31.030463] __vm_munmap+0x138/0x3a0 [ 31.030931] __x64_sys_munmap+0x59/0x80 [ 31.031430] do_syscall_64+0x3f/0x90 [ 31.031904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.032552] [ 31.032766] The buggy address belongs to the object at ffff888017f0e9f8 [ 31.032766] which belongs to the cache vm_area_struct of size 168 [ 31.034230] The buggy address is located 88 bytes inside of [ 31.034230] freed 168-byte region [ffff888017f0e9f8, ffff888017f0eaa0) [ 31.035644] [ 31.035859] The buggy address belongs to the physical page: [ 31.036514] page:00000000f5f459e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f0e [ 31.037619] memcg:ffff88801a38a501 [ 31.038049] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.038692] page_type: 0xffffffff() [ 31.039160] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.040071] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a38a501 [ 31.040979] page dumped because: kasan: bad access detected [ 31.041641] [ 31.041856] Memory state around the buggy address: [ 31.042440] ffff888017f0e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.043307] ffff888017f0e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.044154] >ffff888017f0ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.045009] ^ [ 31.045713] ffff888017f0ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.046561] ffff888017f0eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.047432] ================================================================== [ 31.048371] Disabling lock debugging due to kernel taint [ 32.720901] BUG: Bad rss-counter state mm:000000004b308078 type:MM_FILEPAGES val:33 [ 32.722080] BUG: Bad rss-counter state mm:000000004b308078 type:MM_ANONPAGES val:22 [ 33.133053] BUG: Bad rss-counter state mm:000000006858ec13 type:MM_FILEPAGES val:33 [ 33.134119] BUG: Bad rss-counter state mm:000000006858ec13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36536' (ECDSA) to the list of known hosts. 2023/06/20 15:01:38 fuzzer started 2023/06/20 15:01:38 dialing manager at localhost:36067 2023/06/20 15:01:38 checking machine... 2023/06/20 15:01:38 checking revisions... [ 33.870891] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:01:38 testing simple program... [ 33.905796] cgroup: Unknown subsys name 'net' [ 33.961570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:01:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d90000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81201224 RDI=ffff888008d9002c RBP=ffff8880087a6280 RSP=ffff888008d9feb8 R8 =0000000000000001 R9 =ffffed10011b2003 R10=ffff888008d9001b R11=0000000000000000 R12=ffffffff854e8ec0 R13=ffff888008d90000 R14=ffff888008d90000 R15=0000000000000000 RIP=ffffffff8120123d RFL=00000217 [----APC] 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 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=00007fff6d29dd68 CR3=000000000ea14000 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=31303a3531203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038333a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343430 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=00007f3f7a563550 CR3=000000000ea14000 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=2038333a31303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a31303a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000