syzkaller login: [ 30.156077] BUG: Bad rss-counter state mm:00000000069dcd84 type:MM_FILEPAGES val:33 [ 30.158455] BUG: Bad rss-counter state mm:00000000069dcd84 type:MM_ANONPAGES val:22 [ 30.314324] ================================================================== [ 30.315435] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.316590] Read of size 8 at addr ffff88800f299df0 by task sshd/219 [ 30.317682] [ 30.317908] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.318790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.319786] Call Trace: [ 30.320115] [ 30.320402] dump_stack_lvl+0x91/0xf0 [ 30.320900] print_report+0xcc/0x620 [ 30.321402] ? __virt_addr_valid+0x102/0x340 [ 30.321959] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.322586] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323223] kasan_report+0xbe/0xf0 [ 30.323708] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324349] vma_interval_tree_remove+0xc75/0xec0 [ 30.324956] vma_prepare+0xc54/0x11a0 [ 30.325467] __split_vma+0x5af/0x950 [ 30.325941] ? __pfx___split_vma+0x10/0x10 [ 30.326475] ? find_held_lock+0x2c/0x110 [ 30.327018] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.327603] ? lock_is_held_type+0x9f/0x120 [ 30.328140] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.328746] ? mtree_range_walk+0x632/0x900 [ 30.329322] ? mas_walk+0x5c7/0x7c0 [ 30.329796] do_vmi_munmap+0x1f1/0x2b0 [ 30.330293] mmap_region+0x1f9/0x2660 [ 30.330778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.331299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.332010] ? __pfx_lock_acquire+0x10/0x10 [ 30.332545] ? __pfx_mmap_region+0x10/0x10 [ 30.333085] ? security_mmap_addr+0x7d/0xa0 [ 30.333625] ? get_unmapped_area+0x1f5/0x3f0 [ 30.334172] do_mmap+0x854/0xf00 [ 30.334606] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.335111] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.335682] ksys_mmap_pgoff+0x3af/0x500 [ 30.336186] do_syscall_64+0x3f/0x90 [ 30.336661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337338] RIP: 0033:0x7f35f1c3cd82 [ 30.337796] 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 [ 30.339924] RSP: 002b:00007ffddfa29eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.340824] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35f1c3cd82 [ 30.341677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35f1076000 [ 30.342520] RBP: 00007f35f1076000 R08: 0000000000000009 R09: 0000000000001000 [ 30.343368] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a10d018f70 [ 30.344214] R13: 00007ffddfa29ed0 R14: 00007ffddfa29f00 R15: 00007ffddfa2a260 [ 30.345084] [ 30.345380] [ 30.345595] Allocated by task 212: [ 30.346022] kasan_save_stack+0x22/0x50 [ 30.346533] kasan_set_track+0x25/0x30 [ 30.347027] __kasan_slab_alloc+0x59/0x70 [ 30.347553] kmem_cache_alloc+0x16b/0x370 [ 30.348073] vm_area_dup+0x20/0x160 [ 30.348531] __split_vma+0x170/0x950 [ 30.348995] split_vma+0xc6/0x110 [ 30.349455] mprotect_fixup+0x8d2/0xb30 [ 30.349958] do_mprotect_pkey+0x87e/0xd40 [ 30.350486] __x64_sys_mprotect+0x78/0xc0 [ 30.351014] do_syscall_64+0x3f/0x90 [ 30.351497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352148] [ 30.352363] Freed by task 212: [ 30.352753] kasan_save_stack+0x22/0x50 [ 30.353267] kasan_set_track+0x25/0x30 [ 30.353763] kasan_save_free_info+0x2b/0x50 [ 30.354300] __kasan_slab_free+0x10a/0x190 [ 30.354835] kmem_cache_free+0x10d/0x4d0 [ 30.355344] rcu_core+0x8c8/0x2860 [ 30.355794] __do_softirq+0x1b7/0x7d4 [ 30.356280] [ 30.356513] Last potentially related work creation: [ 30.357117] kasan_save_stack+0x22/0x50 [ 30.357715] __kasan_record_aux_stack+0x8e/0xa0 [ 30.358294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.358933] remove_vma+0x139/0x170 [ 30.359389] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.359949] do_vmi_munmap+0x1f1/0x2b0 [ 30.360442] __vm_munmap+0x138/0x3a0 [ 30.360912] __x64_sys_munmap+0x59/0x80 [ 30.361432] do_syscall_64+0x3f/0x90 [ 30.361908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362547] [ 30.362761] The buggy address belongs to the object at ffff88800f299d98 [ 30.362761] which belongs to the cache vm_area_struct of size 168 [ 30.364230] The buggy address is located 88 bytes inside of [ 30.364230] freed 168-byte region [ffff88800f299d98, ffff88800f299e40) [ 30.365659] [ 30.365874] The buggy address belongs to the physical page: [ 30.366539] page:0000000074d2a01c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf299 [ 30.367620] memcg:ffff88800e83b801 [ 30.368049] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.368698] page_type: 0xffffffff() [ 30.369170] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.370087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e83b801 [ 30.371004] page dumped because: kasan: bad access detected [ 30.371671] [ 30.371886] Memory state around the buggy address: [ 30.372464] ffff88800f299c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.373329] ffff88800f299d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.374192] >ffff88800f299d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.375081] ^ [ 30.375889] ffff88800f299e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.376773] ffff88800f299e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.377670] ================================================================== [ 30.378681] Disabling lock debugging due to kernel taint [ 32.625304] BUG: Bad rss-counter state mm:000000001c642157 type:MM_FILEPAGES val:33 [ 32.626310] BUG: Bad rss-counter state mm:000000001c642157 type:MM_ANONPAGES val:22 [ 33.148438] BUG: Bad rss-counter state mm:00000000cf3d3cf7 type:MM_FILEPAGES val:33 [ 33.149500] BUG: Bad rss-counter state mm:00000000cf3d3cf7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21825' (ECDSA) to the list of known hosts. 2023/06/20 20:36:08 fuzzer started 2023/06/20 20:36:09 dialing manager at localhost:36067 2023/06/20 20:36:09 checking machine... 2023/06/20 20:36:09 checking revisions... [ 33.854855] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:36:09 testing simple program... [ 33.906921] cgroup: Unknown subsys name 'net' [ 33.953477] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:36:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff110018ace85 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800c567418 R8 =0000000000000000 R9 =0000000000000000 R10=00000000000000d2 R11=0000096800000968 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ead RFL=00000212 [----A--] 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 00007fa0f086e900 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=00007fa0f0e25618 CR3=000000000d852000 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=2038303a36333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36333a3032203032 XMM08=69767265733d7373616c63742030733a 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=ffff888008c04400 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=00007f766f74dc80 CR3=000000000c7ae000 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=4271bc0ef3ce95bf154770954652d772 XMM02=2c67c8bc2e329bc3000000000011daa8 XMM03=fb795ef6d65770560000000000122248 XMM04=1a8094a7b88cd4b900000000000ae988 XMM05=e4cb8bb95a7664b60000000000132090 XMM06=c291bd5c70af25b90000000000131f18 XMM07=e042d86d42eb936e00000000001224c8 XMM08=1be13da4e60b0a90000000000011db08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000