syzkaller login: [ 38.237957] BUG: Bad rss-counter state mm:0000000072aa3bba type:MM_FILEPAGES val:33 [ 38.240049] BUG: Bad rss-counter state mm:0000000072aa3bba type:MM_ANONPAGES val:22 [ 38.342813] ================================================================== [ 38.343932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.345074] Read of size 8 at addr ffff88801a3673f8 by task sshd/219 [ 38.346394] [ 38.346535] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.347108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.347759] Call Trace: [ 38.347983] [ 38.348178] dump_stack_lvl+0x91/0xf0 [ 38.348506] print_report+0xcc/0x620 [ 38.348835] ? __virt_addr_valid+0x102/0x340 [ 38.349202] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.349603] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.350019] kasan_report+0xbe/0xf0 [ 38.350334] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.350739] vma_interval_tree_remove+0xc75/0xec0 [ 38.351140] vma_prepare+0xc54/0x11a0 [ 38.351453] __split_vma+0x5af/0x950 [ 38.351764] ? __pfx___split_vma+0x10/0x10 [ 38.352122] ? find_held_lock+0x2c/0x110 [ 38.352464] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.352829] ? lock_is_held_type+0x9f/0x120 [ 38.353196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.353586] ? mtree_range_walk+0x632/0x900 [ 38.353966] ? mas_walk+0x5c7/0x7c0 [ 38.354276] do_vmi_munmap+0x1f1/0x2b0 [ 38.354612] mmap_region+0x1f9/0x2660 [ 38.354943] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.355279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.355746] ? __pfx_lock_acquire+0x10/0x10 [ 38.356113] ? __pfx_mmap_region+0x10/0x10 [ 38.356456] ? security_mmap_addr+0x7d/0xa0 [ 38.356808] ? get_unmapped_area+0x1f5/0x3f0 [ 38.357195] do_mmap+0x854/0xf00 [ 38.357505] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.357855] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.358250] ksys_mmap_pgoff+0x3af/0x500 [ 38.358575] do_syscall_64+0x3f/0x90 [ 38.358887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.359332] RIP: 0033:0x7faf5f60ed82 [ 38.359651] 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 [ 38.361100] RSP: 002b:00007ffdaa9b0c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.361720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf5f60ed82 [ 38.362331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf5ea48000 [ 38.362911] RBP: 00007faf5ea48000 R08: 0000000000000009 R09: 0000000000001000 [ 38.363487] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a1e8caf70 [ 38.364072] R13: 00007ffdaa9b0ca0 R14: 00007ffdaa9b0cd0 R15: 00007ffdaa9b1030 [ 38.364656] [ 38.364845] [ 38.364992] Allocated by task 212: [ 38.365274] kasan_save_stack+0x22/0x50 [ 38.365605] kasan_set_track+0x25/0x30 [ 38.365959] __kasan_slab_alloc+0x59/0x70 [ 38.366303] kmem_cache_alloc+0x16b/0x370 [ 38.366643] vm_area_dup+0x20/0x160 [ 38.366973] __split_vma+0x170/0x950 [ 38.367309] split_vma+0xc6/0x110 [ 38.367604] mprotect_fixup+0x8d2/0xb30 [ 38.367941] do_mprotect_pkey+0x87e/0xd40 [ 38.368285] __x64_sys_mprotect+0x78/0xc0 [ 38.368624] do_syscall_64+0x3f/0x90 [ 38.368941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.369363] [ 38.369503] Freed by task 212: [ 38.369777] kasan_save_stack+0x22/0x50 [ 38.370114] kasan_set_track+0x25/0x30 [ 38.370437] kasan_save_free_info+0x2b/0x50 [ 38.370787] __kasan_slab_free+0x10a/0x190 [ 38.371147] kmem_cache_free+0x10d/0x4d0 [ 38.371482] rcu_core+0x8c8/0x2860 [ 38.371778] __do_softirq+0x1b7/0x7d4 [ 38.372112] [ 38.372259] Last potentially related work creation: [ 38.372666] kasan_save_stack+0x22/0x50 [ 38.373000] __kasan_record_aux_stack+0x8e/0xa0 [ 38.373375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.373826] remove_vma+0x139/0x170 [ 38.374147] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.374502] do_vmi_munmap+0x1f1/0x2b0 [ 38.374811] __vm_munmap+0x138/0x3a0 [ 38.375118] __x64_sys_munmap+0x59/0x80 [ 38.375430] do_syscall_64+0x3f/0x90 [ 38.375727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.376141] [ 38.376278] The buggy address belongs to the object at ffff88801a3673a0 [ 38.376278] which belongs to the cache vm_area_struct of size 168 [ 38.377269] The buggy address is located 88 bytes inside of [ 38.377269] freed 168-byte region [ffff88801a3673a0, ffff88801a367448) [ 38.378243] [ 38.378383] The buggy address belongs to the physical page: [ 38.378817] page:0000000013a55f01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a367 [ 38.379558] memcg:ffff88800fdb6301 [ 38.379837] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.380273] page_type: 0xffffffff() [ 38.380571] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.381211] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdb6301 [ 38.381831] page dumped because: kasan: bad access detected [ 38.382281] [ 38.382424] Memory state around the buggy address: [ 38.382824] ffff88801a367280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.383408] ffff88801a367300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.383994] >ffff88801a367380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.384568] ^ [ 38.385135] ffff88801a367400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.385692] ffff88801a367480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.386274] ================================================================== [ 38.386895] Disabling lock debugging due to kernel taint [ 39.901837] BUG: Bad rss-counter state mm:00000000a4a04e3e type:MM_FILEPAGES val:33 [ 39.903034] BUG: Bad rss-counter state mm:00000000a4a04e3e type:MM_ANONPAGES val:22 [ 40.273913] BUG: Bad rss-counter state mm:00000000bae6b90c type:MM_FILEPAGES val:33 [ 40.275227] BUG: Bad rss-counter state mm:00000000bae6b90c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31180' (ECDSA) to the list of known hosts. 2023/06/19 18:23:16 fuzzer started 2023/06/19 18:23:16 dialing manager at localhost:44161 2023/06/19 18:23:16 checking machine... 2023/06/19 18:23:16 checking revisions... [ 41.003048] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:23:16 testing simple program... [ 41.052358] cgroup: Unknown subsys name 'net' [ 41.097560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85618098 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce09da8 RBP=1ffff1100d9c13b1 RSP=ffff88806ce09d80 R8 =0000000000000001 R9 =ffffed100d9c13b5 R10=0000000000000003 R11=1ffff1100d9c7479 R12=ffffffff856180a0 R13=ffffffff856180a8 R14=0000000000000200 R15=0000000000000000 RIP=ffffffff812e00f6 RFL=00000046 [---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 00007f0e1bad4900 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=00007ffddf6ae000 CR3=000000000f070000 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=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 info registers vcpu 1 RAX=ffffffff813782a8 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e60 RDI=ffff88806cf09e60 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff86137008 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 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 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=00007f8816a73d20 CR3=0000000019fc8000 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=2036313a33323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a33323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000