syzkaller login: [ 69.618943] BUG: Bad rss-counter state mm:00000000a99cff73 type:MM_FILEPAGES val:33 [ 69.620329] BUG: Bad rss-counter state mm:00000000a99cff73 type:MM_ANONPAGES val:22 [ 69.802185] ================================================================== [ 69.803213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.804366] Read of size 8 at addr ffff88800e4df310 by task sshd/227 [ 69.805235] [ 69.805483] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 69.806487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.807604] Call Trace: [ 69.807970] [ 69.808297] dump_stack_lvl+0x91/0xf0 [ 69.808856] print_report+0xcc/0x620 [ 69.809409] ? __virt_addr_valid+0x102/0x340 [ 69.810046] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.810755] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.811470] kasan_report+0xbe/0xf0 [ 69.812014] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.812723] vma_interval_tree_remove+0xc75/0xec0 [ 69.813423] vma_prepare+0xc54/0x11a0 [ 69.813981] __split_vma+0x5af/0x950 [ 69.814523] ? __pfx___split_vma+0x10/0x10 [ 69.815156] ? find_held_lock+0x2c/0x110 [ 69.815761] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.816417] ? lock_is_held_type+0x9f/0x120 [ 69.817041] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.817736] ? mtree_range_walk+0x632/0x900 [ 69.818377] ? mas_walk+0x5c7/0x7c0 [ 69.818920] do_vmi_munmap+0x1f1/0x2b0 [ 69.819463] mmap_region+0x1f9/0x2660 [ 69.820000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.820564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.821358] ? __pfx_lock_acquire+0x10/0x10 [ 69.821956] ? __pfx_mmap_region+0x10/0x10 [ 69.822538] ? security_mmap_addr+0x7d/0xa0 [ 69.823149] ? get_unmapped_area+0x1f5/0x3f0 [ 69.823760] do_mmap+0x854/0xf00 [ 69.824247] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.824790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.825406] ksys_mmap_pgoff+0x3af/0x500 [ 69.825959] do_syscall_64+0x3f/0x90 [ 69.826480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.827198] RIP: 0033:0x7fbae6269d82 [ 69.827704] 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 [ 69.830123] RSP: 002b:00007ffc0dcbd838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.831175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbae6269d82 [ 69.832142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbae56a3000 [ 69.833113] RBP: 00007fbae56a3000 R08: 0000000000000009 R09: 0000000000001000 [ 69.834080] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626c9007b20 [ 69.835058] R13: 00007ffc0dcbd850 R14: 00007ffc0dcbd880 R15: 00007ffc0dcbdbe0 [ 69.836040] [ 69.836375] [ 69.836624] Allocated by task 220: [ 69.837113] kasan_save_stack+0x22/0x50 [ 69.837692] kasan_set_track+0x25/0x30 [ 69.838253] __kasan_slab_alloc+0x59/0x70 [ 69.838859] kmem_cache_alloc+0x16b/0x370 [ 69.839450] vm_area_dup+0x20/0x160 [ 69.839968] __split_vma+0x170/0x950 [ 69.840502] split_vma+0xc6/0x110 [ 69.840997] mprotect_fixup+0x8d2/0xb30 [ 69.841575] do_mprotect_pkey+0x87e/0xd40 [ 69.842173] __x64_sys_mprotect+0x78/0xc0 [ 69.842772] do_syscall_64+0x3f/0x90 [ 69.843315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.844167] [ 69.844411] Freed by task 220: [ 69.844849] kasan_save_stack+0x22/0x50 [ 69.845411] kasan_set_track+0x25/0x30 [ 69.845962] kasan_save_free_info+0x2b/0x50 [ 69.846555] __kasan_slab_free+0x10a/0x190 [ 69.847166] kmem_cache_free+0x10d/0x4d0 [ 69.847731] rcu_core+0x8c8/0x2860 [ 69.848224] __do_softirq+0x1b7/0x7d4 [ 69.848752] [ 69.849000] Last potentially related work creation: [ 69.849655] kasan_save_stack+0x22/0x50 [ 69.850221] __kasan_record_aux_stack+0x8e/0xa0 [ 69.850869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.851676] remove_vma+0x139/0x170 [ 69.852169] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.852771] do_vmi_munmap+0x1f1/0x2b0 [ 69.853295] __vm_munmap+0x138/0x3a0 [ 69.853801] __x64_sys_munmap+0x59/0x80 [ 69.854341] do_syscall_64+0x3f/0x90 [ 69.854861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.855555] [ 69.855788] Second to last potentially related work creation: [ 69.856530] kasan_save_stack+0x22/0x50 [ 69.857078] __kasan_record_aux_stack+0x8e/0xa0 [ 69.857705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.858398] remove_vma+0x139/0x170 [ 69.858908] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.859522] do_vmi_munmap+0x1f1/0x2b0 [ 69.860051] __vm_munmap+0x138/0x3a0 [ 69.860554] elf_map+0x26f/0x310 [ 69.861032] load_elf_binary+0x3417/0x5030 [ 69.861613] bprm_execve+0x803/0x1940 [ 69.862130] do_execveat_common+0x734/0x8e0 [ 69.862708] __x64_sys_execve+0x93/0xc0 [ 69.863243] do_syscall_64+0x3f/0x90 [ 69.863765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.864466] [ 69.864704] The buggy address belongs to the object at ffff88800e4df2b8 [ 69.864704] which belongs to the cache vm_area_struct of size 168 [ 69.866303] The buggy address is located 88 bytes inside of [ 69.866303] freed 168-byte region [ffff88800e4df2b8, ffff88800e4df360) [ 69.867821] [ 69.868061] The buggy address belongs to the physical page: [ 69.868776] page:0000000046dc4fb3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4df [ 69.869952] memcg:ffff88800ca10a01 [ 69.870420] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.871121] page_type: 0xffffffff() [ 69.871609] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 69.872604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca10a01 [ 69.873580] page dumped because: kasan: bad access detected [ 69.874292] [ 69.874523] Memory state around the buggy address: [ 69.875160] ffff88800e4df200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 69.876084] ffff88800e4df280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 69.877002] >ffff88800e4df300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 69.877923] ^ [ 69.878422] ffff88800e4df380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 69.879363] ffff88800e4df400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 69.880272] ================================================================== [ 69.881349] Disabling lock debugging due to kernel taint [ 72.309728] BUG: Bad rss-counter state mm:00000000fe0c1eb7 type:MM_FILEPAGES val:33 [ 72.310709] BUG: Bad rss-counter state mm:00000000fe0c1eb7 type:MM_ANONPAGES val:22 [ 72.825888] BUG: Bad rss-counter state mm:000000006b356abc type:MM_FILEPAGES val:33 [ 72.826907] BUG: Bad rss-counter state mm:000000006b356abc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22128' (ECDSA) to the list of known hosts. 2023/06/20 00:40:03 fuzzer started 2023/06/20 00:40:03 dialing manager at localhost:44161 2023/06/20 00:40:03 checking machine... 2023/06/20 00:40:03 checking revisions... [ 73.552440] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:40:03 testing simple program... [ 73.605487] cgroup: Unknown subsys name 'net' [ 73.658596] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:40:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007feb462be7e8 CR3=0000000016aba000 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=2033303a30343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a30343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000201 RCX=1ffffffff0ba7a02 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff8386ae2d RBP=ffffffff8386ae2d RSP=ffff88800f7ff9c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffffff8386ae2d R13=00000000000000ed R14=ffff888008c78000 R15=ffff888014643000 RIP=ffffffff812dc0f6 RFL=00000012 [----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 00007f7856f13900 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=00007ffe79f10000 CR3=00000000194ec000 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=6720646572637465733a4d41503d706f 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