syzkaller login: [ 30.192661] BUG: Bad rss-counter state mm:00000000d5e187dc type:MM_FILEPAGES val:33 [ 30.193903] BUG: Bad rss-counter state mm:00000000d5e187dc type:MM_ANONPAGES val:22 [ 30.389483] ================================================================== [ 30.390475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.391499] Read of size 8 at addr ffff88801a0715c8 by task sshd/222 [ 30.392458] [ 30.392699] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.393679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.394775] Call Trace: [ 30.395131] [ 30.395447] dump_stack_lvl+0x91/0xf0 [ 30.395989] print_report+0xcc/0x620 [ 30.396524] ? __virt_addr_valid+0x102/0x340 [ 30.397096] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.397713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.398396] kasan_report+0xbe/0xf0 [ 30.398933] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.399652] vma_interval_tree_remove+0xc75/0xec0 [ 30.400352] vma_prepare+0xc54/0x11a0 [ 30.400907] __split_vma+0x5af/0x950 [ 30.401479] ? __pfx___split_vma+0x10/0x10 [ 30.402109] ? find_held_lock+0x2c/0x110 [ 30.402737] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.403407] ? lock_is_held_type+0x9f/0x120 [ 30.404043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.404758] ? mtree_range_walk+0x632/0x900 [ 30.405337] ? mas_walk+0x5c7/0x7c0 [ 30.405847] do_vmi_munmap+0x1f1/0x2b0 [ 30.406356] mmap_region+0x1f9/0x2660 [ 30.406854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.407385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.408117] ? __pfx_lock_acquire+0x10/0x10 [ 30.408667] ? __pfx_mmap_region+0x10/0x10 [ 30.409215] ? security_mmap_addr+0x7d/0xa0 [ 30.409772] ? get_unmapped_area+0x1f5/0x3f0 [ 30.410341] do_mmap+0x854/0xf00 [ 30.410798] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.411311] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.411888] ksys_mmap_pgoff+0x3af/0x500 [ 30.412414] do_syscall_64+0x3f/0x90 [ 30.412907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.413588] RIP: 0033:0x7f5304f56d82 [ 30.414055] 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 [ 30.416263] RSP: 002b:00007ffeb7dd21b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.417198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5304f56d82 [ 30.418080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5304390000 [ 30.418959] RBP: 00007f5304390000 R08: 0000000000000009 R09: 0000000000001000 [ 30.419834] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557bd0a1aec0 [ 30.420714] R13: 00007ffeb7dd21d0 R14: 00007ffeb7dd2200 R15: 00007ffeb7dd2560 [ 30.421605] [ 30.421908] [ 30.422127] Allocated by task 213: [ 30.422572] kasan_save_stack+0x22/0x50 [ 30.423098] kasan_set_track+0x25/0x30 [ 30.423605] __kasan_slab_alloc+0x59/0x70 [ 30.424147] kmem_cache_alloc+0x16b/0x370 [ 30.424684] vm_area_dup+0x20/0x160 [ 30.425165] __split_vma+0x170/0x950 [ 30.425659] split_vma+0xc6/0x110 [ 30.426111] mprotect_fixup+0x8d2/0xb30 [ 30.426635] do_mprotect_pkey+0x87e/0xd40 [ 30.427177] __x64_sys_mprotect+0x78/0xc0 [ 30.427720] do_syscall_64+0x3f/0x90 [ 30.428208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.428876] [ 30.429096] Freed by task 19: [ 30.429496] kasan_save_stack+0x22/0x50 [ 30.430015] kasan_set_track+0x25/0x30 [ 30.430527] kasan_save_free_info+0x2b/0x50 [ 30.431079] __kasan_slab_free+0x10a/0x190 [ 30.431635] kmem_cache_free+0x10d/0x4d0 [ 30.432166] rcu_core+0x8c8/0x2860 [ 30.432624] __do_softirq+0x1b7/0x7d4 [ 30.433113] [ 30.433337] Last potentially related work creation: [ 30.433960] kasan_save_stack+0x22/0x50 [ 30.434485] __kasan_record_aux_stack+0x8e/0xa0 [ 30.435080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.435746] remove_vma+0x139/0x170 [ 30.436218] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.436797] do_vmi_munmap+0x1f1/0x2b0 [ 30.437298] __vm_munmap+0x138/0x3a0 [ 30.437798] __x64_sys_munmap+0x59/0x80 [ 30.438315] do_syscall_64+0x3f/0x90 [ 30.438804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.439475] [ 30.439698] The buggy address belongs to the object at ffff88801a071570 [ 30.439698] which belongs to the cache vm_area_struct of size 168 [ 30.441210] The buggy address is located 88 bytes inside of [ 30.441210] freed 168-byte region [ffff88801a071570, ffff88801a071618) [ 30.442684] [ 30.442906] The buggy address belongs to the physical page: [ 30.443594] page:00000000ce2f4f45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a071 [ 30.444724] memcg:ffff888015db4101 [ 30.445164] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.445843] page_type: 0xffffffff() [ 30.446305] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.447255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015db4101 [ 30.448196] page dumped because: kasan: bad access detected [ 30.448877] [ 30.449099] Memory state around the buggy address: [ 30.449719] ffff88801a071480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.450603] ffff88801a071500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.451489] >ffff88801a071580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.452372] ^ [ 30.453065] ffff88801a071600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.453945] ffff88801a071680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.454831] ================================================================== [ 30.455859] Disabling lock debugging due to kernel taint [ 32.276671] BUG: Bad rss-counter state mm:000000001e7dc4f6 type:MM_FILEPAGES val:33 [ 32.277892] BUG: Bad rss-counter state mm:000000001e7dc4f6 type:MM_ANONPAGES val:22 [ 32.781266] BUG: Bad rss-counter state mm:00000000a8a81825 type:MM_FILEPAGES val:33 [ 32.782419] BUG: Bad rss-counter state mm:00000000a8a81825 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20349' (ECDSA) to the list of known hosts. 2023/06/21 08:15:18 fuzzer started 2023/06/21 08:15:18 dialing manager at localhost:36067 2023/06/21 08:15:18 checking machine... 2023/06/21 08:15:18 checking revisions... [ 33.528141] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:15:18 testing simple program... [ 33.594403] cgroup: Unknown subsys name 'net' [ 33.638762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:15:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fdd5a8fab20 CR3=000000000c98a000 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=2037313a35313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a35313a3830203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000002 RDX=ffff88806cf09a58 RSI=ffff88806cf09e58 RDI=ffff88806cf09a58 RBP=ffff88806cf09e58 RSP=ffff88806cf099a8 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000244d5 R12=0000000000000008 R13=ffff88806cf09a98 R14=ffff88806cf09e58 R15=ffff88806cf09a50 RIP=ffffffff8113043d RFL=00000202 [-------] 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 00007fb4d0b81900 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=00007fb4d0b60020 CR3=000000000d6d0000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000