syzkaller login: [ 39.447125] BUG: Bad rss-counter state mm:000000000a3cc399 type:MM_FILEPAGES val:33 [ 39.448742] BUG: Bad rss-counter state mm:000000000a3cc399 type:MM_ANONPAGES val:22 [ 39.601546] ================================================================== [ 39.602342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.603156] Read of size 8 at addr ffff88800e1a86b0 by task sshd/218 [ 39.603821] [ 39.604007] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.604760] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.605780] Call Trace: [ 39.606059] [ 39.606305] dump_stack_lvl+0x91/0xf0 [ 39.606732] print_report+0xcc/0x620 [ 39.607155] ? __virt_addr_valid+0x102/0x340 [ 39.607642] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.608174] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.608713] kasan_report+0xbe/0xf0 [ 39.609127] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.609670] vma_interval_tree_remove+0xc75/0xec0 [ 39.610193] vma_prepare+0xc54/0x11a0 [ 39.610609] __split_vma+0x5af/0x950 [ 39.611020] ? __pfx___split_vma+0x10/0x10 [ 39.611472] ? find_held_lock+0x2c/0x110 [ 39.611919] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.612403] ? lock_is_held_type+0x9f/0x120 [ 39.612878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.613421] ? mtree_range_walk+0x632/0x900 [ 39.613909] ? mas_walk+0x5c7/0x7c0 [ 39.614324] do_vmi_munmap+0x1f1/0x2b0 [ 39.614750] mmap_region+0x1f9/0x2660 [ 39.615178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.615627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.616268] ? __pfx_lock_acquire+0x10/0x10 [ 39.616732] ? __pfx_mmap_region+0x10/0x10 [ 39.617205] ? security_mmap_addr+0x7d/0xa0 [ 39.617698] ? get_unmapped_area+0x1f5/0x3f0 [ 39.618174] do_mmap+0x854/0xf00 [ 39.618561] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.619001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.619499] ksys_mmap_pgoff+0x3af/0x500 [ 39.619953] do_syscall_64+0x3f/0x90 [ 39.620372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.620933] RIP: 0033:0x7f9b4f235d82 [ 39.621337] 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 [ 39.623194] RSP: 002b:00007ffdb99932f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.623995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b4f235d82 [ 39.624743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b4e66f000 [ 39.625503] RBP: 00007f9b4e66f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.626238] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562d0ee6b20 [ 39.626985] R13: 00007ffdb9993310 R14: 00007ffdb9993340 R15: 00007ffdb99936a0 [ 39.627751] [ 39.628008] [ 39.628195] Allocated by task 211: [ 39.628571] kasan_save_stack+0x22/0x50 [ 39.629010] kasan_set_track+0x25/0x30 [ 39.629445] __kasan_slab_alloc+0x59/0x70 [ 39.629902] kmem_cache_alloc+0x16b/0x370 [ 39.630355] vm_area_dup+0x20/0x160 [ 39.630751] __split_vma+0x170/0x950 [ 39.631155] split_vma+0xc6/0x110 [ 39.631543] mprotect_fixup+0x8d2/0xb30 [ 39.631992] do_mprotect_pkey+0x87e/0xd40 [ 39.632450] __x64_sys_mprotect+0x78/0xc0 [ 39.632909] do_syscall_64+0x3f/0x90 [ 39.633349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.633924] [ 39.634116] Freed by task 211: [ 39.634473] kasan_save_stack+0x22/0x50 [ 39.634927] kasan_set_track+0x25/0x30 [ 39.635367] kasan_save_free_info+0x2b/0x50 [ 39.635835] __kasan_slab_free+0x10a/0x190 [ 39.636310] kmem_cache_free+0x10d/0x4d0 [ 39.636755] rcu_core+0x8c8/0x2860 [ 39.637150] __do_softirq+0x1b7/0x7d4 [ 39.637579] [ 39.637777] Last potentially related work creation: [ 39.638302] kasan_save_stack+0x22/0x50 [ 39.638752] __kasan_record_aux_stack+0x8e/0xa0 [ 39.639261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.639827] remove_vma+0x139/0x170 [ 39.640233] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.640721] do_vmi_munmap+0x1f1/0x2b0 [ 39.641158] __vm_munmap+0x138/0x3a0 [ 39.641575] __x64_sys_munmap+0x59/0x80 [ 39.642010] do_syscall_64+0x3f/0x90 [ 39.642427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.643002] [ 39.643193] The buggy address belongs to the object at ffff88800e1a8658 [ 39.643193] which belongs to the cache vm_area_struct of size 168 [ 39.644518] The buggy address is located 88 bytes inside of [ 39.644518] freed 168-byte region [ffff88800e1a8658, ffff88800e1a8700) [ 39.645783] [ 39.645979] The buggy address belongs to the physical page: [ 39.646562] page:00000000fe5699a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a8 [ 39.647513] memcg:ffff88800ede5e01 [ 39.647904] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.648476] page_type: 0xffffffff() [ 39.648879] raw: 0100000000000200 ffff88800879fc80 ffffea00003bac40 dead000000000006 [ 39.649694] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ede5e01 [ 39.650497] page dumped because: kasan: bad access detected [ 39.651096] [ 39.651290] Memory state around the buggy address: [ 39.651818] ffff88800e1a8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.652592] ffff88800e1a8600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.653382] >ffff88800e1a8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.654161] ^ [ 39.654695] ffff88800e1a8700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 39.655490] ffff88800e1a8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.656257] ================================================================== [ 39.657293] Disabling lock debugging due to kernel taint [ 41.810824] BUG: Bad rss-counter state mm:000000006c887c7b type:MM_FILEPAGES val:33 [ 41.812026] BUG: Bad rss-counter state mm:000000006c887c7b type:MM_ANONPAGES val:22 [ 42.293758] BUG: Bad rss-counter state mm:00000000e14eb933 type:MM_FILEPAGES val:33 [ 42.295470] BUG: Bad rss-counter state mm:00000000e14eb933 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31565' (ECDSA) to the list of known hosts. 2023/06/19 11:16:10 fuzzer started 2023/06/19 11:16:10 dialing manager at localhost:44161 2023/06/19 11:16:10 checking machine... 2023/06/19 11:16:10 checking revisions... [ 43.050503] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:16:10 testing simple program... [ 43.102713] cgroup: Unknown subsys name 'net' [ 43.173194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:16:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8613751a RDX=1ffff1100d9c135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b54 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 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=00007faab2badfe0 CR3=000000000e70c000 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=2039303a36313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a36313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000020 RCX=0000000000000000 RDX=ffff88800fa91b40 RSI=ffffffff8449effb RDI=0000000000000000 RBP=ffff888014309608 RSP=ffff88800c69fce0 R8 =0000000000000000 R9 =0000000000000004 R10=0000000000000008 R11=0000000000000000 R12=0000000000000004 R13=0000000000000008 R14=0000563e2a341130 R15=0000563e28eaefff RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f82c00b0900 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=0000563e2a341130 CR3=000000000db24000 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