syzkaller login: [ 46.214044] BUG: Bad rss-counter state mm:00000000f4f33940 type:MM_FILEPAGES val:33 [ 46.215155] BUG: Bad rss-counter state mm:00000000f4f33940 type:MM_ANONPAGES val:22 [ 46.390443] ================================================================== [ 46.391412] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.392551] Read of size 8 at addr ffff88800d81f4e0 by task sshd/227 [ 46.393332] [ 46.393556] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.394426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.395418] Call Trace: [ 46.395742] [ 46.396030] dump_stack_lvl+0x91/0xf0 [ 46.396522] print_report+0xcc/0x620 [ 46.397009] ? __virt_addr_valid+0x102/0x340 [ 46.397569] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.398195] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.398816] kasan_report+0xbe/0xf0 [ 46.399292] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.399913] vma_interval_tree_remove+0xc75/0xec0 [ 46.400519] vma_prepare+0xc54/0x11a0 [ 46.400999] __split_vma+0x5af/0x950 [ 46.401475] ? __pfx___split_vma+0x10/0x10 [ 46.402033] ? find_held_lock+0x2c/0x110 [ 46.402555] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.403122] ? lock_is_held_type+0x9f/0x120 [ 46.403659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.404267] ? mtree_range_walk+0x632/0x900 [ 46.404819] ? mas_walk+0x5c7/0x7c0 [ 46.405295] do_vmi_munmap+0x1f1/0x2b0 [ 46.405796] mmap_region+0x1f9/0x2660 [ 46.406278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.406792] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.407498] ? __pfx_lock_acquire+0x10/0x10 [ 46.408030] ? __pfx_mmap_region+0x10/0x10 [ 46.408554] ? security_mmap_addr+0x7d/0xa0 [ 46.409091] ? get_unmapped_area+0x1f5/0x3f0 [ 46.409655] do_mmap+0x854/0xf00 [ 46.410097] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.410591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.411155] ksys_mmap_pgoff+0x3af/0x500 [ 46.411660] do_syscall_64+0x3f/0x90 [ 46.412139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.412779] RIP: 0033:0x7f1518420d82 [ 46.413233] 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 [ 46.415327] RSP: 002b:00007ffd0414bfa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.416216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1518420d82 [ 46.417049] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f151785a000 [ 46.417894] RBP: 00007f151785a000 R08: 0000000000000009 R09: 0000000000001000 [ 46.418726] R10: 0000000000000812 R11: 0000000000000206 R12: 000055685c1ddf70 [ 46.419563] R13: 00007ffd0414bfc0 R14: 00007ffd0414bff0 R15: 00007ffd0414c350 [ 46.420409] [ 46.420701] [ 46.420924] Allocated by task 220: [ 46.421349] kasan_save_stack+0x22/0x50 [ 46.421867] kasan_set_track+0x25/0x30 [ 46.422356] __kasan_slab_alloc+0x59/0x70 [ 46.422881] kmem_cache_alloc+0x16b/0x370 [ 46.423390] vm_area_dup+0x20/0x160 [ 46.423845] __split_vma+0x170/0x950 [ 46.424306] split_vma+0xc6/0x110 [ 46.424743] mprotect_fixup+0x8d2/0xb30 [ 46.425241] do_mprotect_pkey+0x87e/0xd40 [ 46.425762] __x64_sys_mprotect+0x78/0xc0 [ 46.426276] do_syscall_64+0x3f/0x90 [ 46.426739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.427365] [ 46.427577] Freed by task 13: [ 46.427956] kasan_save_stack+0x22/0x50 [ 46.428449] kasan_set_track+0x25/0x30 [ 46.428937] kasan_save_free_info+0x2b/0x50 [ 46.429456] __kasan_slab_free+0x10a/0x190 [ 46.430000] kmem_cache_free+0x10d/0x4d0 [ 46.430502] rcu_core+0x8c8/0x2860 [ 46.430940] __do_softirq+0x1b7/0x7d4 [ 46.431405] [ 46.431622] Last potentially related work creation: [ 46.432198] kasan_save_stack+0x22/0x50 [ 46.432696] __kasan_record_aux_stack+0x8e/0xa0 [ 46.433344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.434023] remove_vma+0x139/0x170 [ 46.434512] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.435112] do_vmi_munmap+0x1f1/0x2b0 [ 46.435630] __vm_munmap+0x138/0x3a0 [ 46.436132] __x64_sys_munmap+0x59/0x80 [ 46.436671] do_syscall_64+0x3f/0x90 [ 46.437184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.437886] [ 46.438116] The buggy address belongs to the object at ffff88800d81f488 [ 46.438116] which belongs to the cache vm_area_struct of size 168 [ 46.439698] The buggy address is located 88 bytes inside of [ 46.439698] freed 168-byte region [ffff88800d81f488, ffff88800d81f530) [ 46.441214] [ 46.441452] The buggy address belongs to the physical page: [ 46.442191] page:000000008bc8839c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd81f [ 46.443372] memcg:ffff88800dfc7c01 [ 46.443832] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.444582] page_type: 0xffffffff() [ 46.445065] raw: 0100000000000200 ffff88800879fc80 ffffea00005138c0 dead000000000003 [ 46.446062] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc7c01 [ 46.447036] page dumped because: kasan: bad access detected [ 46.447750] [ 46.447980] Memory state around the buggy address: [ 46.448601] ffff88800d81f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.449522] ffff88800d81f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 46.450462] >ffff88800d81f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.451373] ^ [ 46.452185] ffff88800d81f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 46.453101] ffff88800d81f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.454024] ================================================================== [ 46.455036] Disabling lock debugging due to kernel taint [ 48.765310] BUG: Bad rss-counter state mm:0000000033993017 type:MM_FILEPAGES val:33 [ 48.766489] BUG: Bad rss-counter state mm:0000000033993017 type:MM_ANONPAGES val:22 [ 49.236087] BUG: Bad rss-counter state mm:00000000608ecf9d type:MM_FILEPAGES val:33 [ 49.237522] BUG: Bad rss-counter state mm:00000000608ecf9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4353' (ECDSA) to the list of known hosts. 2023/06/19 14:46:52 fuzzer started 2023/06/19 14:46:53 dialing manager at localhost:44161 2023/06/19 14:46:53 checking machine... 2023/06/19 14:46:53 checking revisions... [ 49.875084] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:46:53 testing simple program... [ 49.917961] cgroup: Unknown subsys name 'net' [ 49.971514] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:46:36 Registers: info registers vcpu 0 RAX=ffffed100d9c135c RBX=ffff88806ce09ad8 RCX=00000000000002d7 RDX=0000000000039500 RSI=0000000000039500 RDI=ffff88806cf39660 RBP=0000000000000001 RSP=ffff88806ce099f0 R8 =dffffc0000000000 R9 =0000000000000000 R10=ffff888008deb180 R11=0000000000020800 R12=ffff88806cf39500 R13=0000000000000001 R14=0000000000000000 R15=ffff88806cf00000 RIP=ffffffff81269e47 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=00007fbb76941ff0 CR3=000000000c58a000 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=2032353a36343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09fb8 RDI=ffffffff8118ddc3 RBP=ffff88806cf09af0 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800ec9d1c0 R15=ffff88800e322e60 RIP=ffffffff811fc8a2 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 00007fb9ce554900 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=00007fb9ce533020 CR3=000000000ebca000 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