syzkaller login: [ 41.707491] sshd (211) used greatest stack depth: 23992 bytes left [ 41.709094] BUG: Bad rss-counter state mm:00000000a7895a9f type:MM_FILEPAGES val:33 [ 41.710725] BUG: Bad rss-counter state mm:00000000a7895a9f type:MM_ANONPAGES val:22 [ 41.868633] ================================================================== [ 41.869564] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.870509] Read of size 8 at addr ffff888017f1e228 by task sshd/218 [ 41.871292] [ 41.871517] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.872506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.873495] Call Trace: [ 41.873810] [ 41.874120] dump_stack_lvl+0x91/0xf0 [ 41.874608] print_report+0xcc/0x620 [ 41.875103] ? __virt_addr_valid+0x102/0x340 [ 41.875657] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.876276] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.876891] kasan_report+0xbe/0xf0 [ 41.877364] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.877980] vma_interval_tree_remove+0xc75/0xec0 [ 41.878581] vma_prepare+0xc54/0x11a0 [ 41.879077] __split_vma+0x5af/0x950 [ 41.879552] ? __pfx___split_vma+0x10/0x10 [ 41.880082] ? find_held_lock+0x2c/0x110 [ 41.880600] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.881163] ? lock_is_held_type+0x9f/0x120 [ 41.881697] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.882320] ? mtree_range_walk+0x632/0x900 [ 41.882867] ? mas_walk+0x5c7/0x7c0 [ 41.883369] do_vmi_munmap+0x1f1/0x2b0 [ 41.883859] mmap_region+0x1f9/0x2660 [ 41.884344] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.884856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.885574] ? __pfx_lock_acquire+0x10/0x10 [ 41.886102] ? __pfx_mmap_region+0x10/0x10 [ 41.886631] ? security_mmap_addr+0x7d/0xa0 [ 41.887172] ? get_unmapped_area+0x1f5/0x3f0 [ 41.887719] do_mmap+0x854/0xf00 [ 41.888172] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.888667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.889234] ksys_mmap_pgoff+0x3af/0x500 [ 41.889745] do_syscall_64+0x3f/0x90 [ 41.890233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.890892] RIP: 0033:0x7f02b2576d82 [ 41.891364] 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 [ 41.893466] RSP: 002b:00007ffd63215c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.894366] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02b2576d82 [ 41.895223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02b19b0000 [ 41.896066] RBP: 00007f02b19b0000 R08: 0000000000000009 R09: 0000000000001000 [ 41.896912] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558df8a3aec0 [ 41.897757] R13: 00007ffd63215c20 R14: 00007ffd63215c50 R15: 00007ffd63215fb0 [ 41.898614] [ 41.898912] [ 41.899133] Allocated by task 211: [ 41.899566] kasan_save_stack+0x22/0x50 [ 41.900068] kasan_set_track+0x25/0x30 [ 41.900561] __kasan_slab_alloc+0x59/0x70 [ 41.901086] kmem_cache_alloc+0x16b/0x370 [ 41.901610] vm_area_dup+0x20/0x160 [ 41.902069] __split_vma+0x170/0x950 [ 41.902537] split_vma+0xc6/0x110 [ 41.902994] mprotect_fixup+0x8d2/0xb30 [ 41.903501] do_mprotect_pkey+0x87e/0xd40 [ 41.904025] __x64_sys_mprotect+0x78/0xc0 [ 41.904550] do_syscall_64+0x3f/0x90 [ 41.905021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.905659] [ 41.905876] Freed by task 211: [ 41.906273] kasan_save_stack+0x22/0x50 [ 41.906777] kasan_set_track+0x25/0x30 [ 41.907282] kasan_save_free_info+0x2b/0x50 [ 41.907814] __kasan_slab_free+0x10a/0x190 [ 41.908344] kmem_cache_free+0x10d/0x4d0 [ 41.908859] rcu_core+0x8c8/0x2860 [ 41.909312] __do_softirq+0x1b7/0x7d4 [ 41.909794] [ 41.910013] Last potentially related work creation: [ 41.910592] kasan_save_stack+0x22/0x50 [ 41.911110] __kasan_record_aux_stack+0x8e/0xa0 [ 41.911681] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.912328] remove_vma+0x139/0x170 [ 41.912782] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.913345] do_vmi_munmap+0x1f1/0x2b0 [ 41.913842] __vm_munmap+0x138/0x3a0 [ 41.914318] __x64_sys_munmap+0x59/0x80 [ 41.914811] do_syscall_64+0x3f/0x90 [ 41.915290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.915933] [ 41.916152] The buggy address belongs to the object at ffff888017f1e1d0 [ 41.916152] which belongs to the cache vm_area_struct of size 168 [ 41.917624] The buggy address is located 88 bytes inside of [ 41.917624] freed 168-byte region [ffff888017f1e1d0, ffff888017f1e278) [ 41.919042] [ 41.919259] The buggy address belongs to the physical page: [ 41.919912] page:0000000043cdd09e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f1e [ 41.921008] memcg:ffff88801a2de501 [ 41.921436] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.922082] page_type: 0xffffffff() [ 41.922530] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.923453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2de501 [ 41.924359] page dumped because: kasan: bad access detected [ 41.925011] [ 41.925224] Memory state around the buggy address: [ 41.925802] ffff888017f1e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.926652] ffff888017f1e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.927518] >ffff888017f1e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.928369] ^ [ 41.928922] ffff888017f1e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.929778] ffff888017f1e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.930628] ================================================================== [ 41.931681] Disabling lock debugging due to kernel taint [ 44.368889] BUG: Bad rss-counter state mm:000000004f6c1298 type:MM_FILEPAGES val:33 [ 44.369654] BUG: Bad rss-counter state mm:000000004f6c1298 type:MM_ANONPAGES val:22 [ 44.947117] BUG: Bad rss-counter state mm:000000001b1bc963 type:MM_FILEPAGES val:33 [ 44.948285] BUG: Bad rss-counter state mm:000000001b1bc963 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61043' (ECDSA) to the list of known hosts. 2023/06/20 06:45:30 fuzzer started 2023/06/20 06:45:30 dialing manager at localhost:44161 2023/06/20 06:45:30 checking machine... 2023/06/20 06:45:30 checking revisions... [ 45.551540] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:45:30 testing simple program... [ 45.594158] cgroup: Unknown subsys name 'net' [ 45.626160] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:45:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff11001ab0e9e RSI=ffffffff8185bfa7 RDI=ffff88800d5874f0 RBP=ffff88800d587400 RSP=ffff88800f037e98 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00000ffffffff000 R14=0000000000000508 R15=00000ffffffff000 RIP=ffffffff814c07e0 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 00007fbc6c972900 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=00007fbc6cf2a0b0 CR3=000000000ef0c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007ffd3ffd4ff8 CR3=000000001a024000 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=2030333a35343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a35343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000