syzkaller login: [ 62.737483] BUG: Bad rss-counter state mm:00000000362d1195 type:MM_FILEPAGES val:33 [ 62.738745] BUG: Bad rss-counter state mm:00000000362d1195 type:MM_ANONPAGES val:22 [ 62.774768] ================================================================== [ 62.775649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.776529] Read of size 8 at addr ffff888009568310 by task sshd/221 [ 62.777371] [ 62.777581] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 62.778544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.779491] Call Trace: [ 62.779801] [ 62.780073] dump_stack_lvl+0x91/0xf0 [ 62.780533] print_report+0xcc/0x620 [ 62.781008] ? __virt_addr_valid+0x102/0x340 [ 62.781526] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.782112] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.782701] kasan_report+0xbe/0xf0 [ 62.783155] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.783746] vma_interval_tree_remove+0xc75/0xec0 [ 62.784317] vma_prepare+0xc54/0x11a0 [ 62.784774] __split_vma+0x5af/0x950 [ 62.785240] ? __pfx___split_vma+0x10/0x10 [ 62.785759] ? find_held_lock+0x2c/0x110 [ 62.786279] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.786836] ? lock_is_held_type+0x9f/0x120 [ 62.787375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.787975] ? mtree_range_walk+0x632/0x900 [ 62.788527] ? mas_walk+0x5c7/0x7c0 [ 62.789014] do_vmi_munmap+0x1f1/0x2b0 [ 62.789493] mmap_region+0x1f9/0x2660 [ 62.789963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.790475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.791179] ? __pfx_lock_acquire+0x10/0x10 [ 62.791704] ? __pfx_mmap_region+0x10/0x10 [ 62.792236] ? security_mmap_addr+0x7d/0xa0 [ 62.792773] ? get_unmapped_area+0x1f5/0x3f0 [ 62.793325] do_mmap+0x854/0xf00 [ 62.793754] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.794250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.794809] ksys_mmap_pgoff+0x3af/0x500 [ 62.795310] do_syscall_64+0x3f/0x90 [ 62.795781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.796418] RIP: 0033:0x7f5744566d82 [ 62.796886] 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 [ 62.798994] RSP: 002b:00007ffc86b894b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.799877] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5744566d82 [ 62.800739] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57439a0000 [ 62.801584] RBP: 00007f57439a0000 R08: 0000000000000009 R09: 0000000000001000 [ 62.802433] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2082a7f70 [ 62.803271] R13: 00007ffc86b894d0 R14: 00007ffc86b89500 R15: 00007ffc86b89860 [ 62.804119] [ 62.804406] [ 62.804623] Allocated by task 213: [ 62.805064] kasan_save_stack+0x22/0x50 [ 62.805557] kasan_set_track+0x25/0x30 [ 62.806044] __kasan_slab_alloc+0x59/0x70 [ 62.806558] kmem_cache_alloc+0x16b/0x370 [ 62.807074] vm_area_dup+0x20/0x160 [ 62.807531] __split_vma+0x170/0x950 [ 62.807991] split_vma+0xc6/0x110 [ 62.808431] mprotect_fixup+0x8d2/0xb30 [ 62.808932] do_mprotect_pkey+0x87e/0xd40 [ 62.809451] __x64_sys_mprotect+0x78/0xc0 [ 62.809965] do_syscall_64+0x3f/0x90 [ 62.810434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.811068] [ 62.811279] Freed by task 213: [ 62.811668] kasan_save_stack+0x22/0x50 [ 62.812160] kasan_set_track+0x25/0x30 [ 62.812669] kasan_save_free_info+0x2b/0x50 [ 62.813194] __kasan_slab_free+0x10a/0x190 [ 62.813720] kmem_cache_free+0x10d/0x4d0 [ 62.814220] rcu_core+0x8c8/0x2860 [ 62.814659] __do_softirq+0x1b7/0x7d4 [ 62.815131] [ 62.815341] Last potentially related work creation: [ 62.815914] kasan_save_stack+0x22/0x50 [ 62.816411] __kasan_record_aux_stack+0x8e/0xa0 [ 62.816997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.817634] remove_vma+0x139/0x170 [ 62.818078] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.818642] do_vmi_munmap+0x1f1/0x2b0 [ 62.819103] __vm_munmap+0x138/0x3a0 [ 62.819547] __x64_sys_munmap+0x59/0x80 [ 62.820017] do_syscall_64+0x3f/0x90 [ 62.820465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.821106] [ 62.821311] The buggy address belongs to the object at ffff8880095682b8 [ 62.821311] which belongs to the cache vm_area_struct of size 168 [ 62.822695] The buggy address is located 88 bytes inside of [ 62.822695] freed 168-byte region [ffff8880095682b8, ffff888009568360) [ 62.824018] [ 62.824225] The buggy address belongs to the physical page: [ 62.824853] page:0000000068690c32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9568 [ 62.825868] memcg:ffff88800f60f401 [ 62.826272] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.826873] page_type: 0xffffffff() [ 62.827297] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.828148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f60f401 [ 62.829017] page dumped because: kasan: bad access detected [ 62.829697] [ 62.829917] Memory state around the buggy address: [ 62.830544] ffff888009568200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 62.831456] ffff888009568280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.832367] >ffff888009568300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.833287] ^ [ 62.833783] ffff888009568380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 62.834698] ffff888009568400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 62.835608] ================================================================== [ 62.836813] Disabling lock debugging due to kernel taint [ 64.812275] BUG: Bad rss-counter state mm:000000003e3040b3 type:MM_FILEPAGES val:33 [ 64.813354] BUG: Bad rss-counter state mm:000000003e3040b3 type:MM_ANONPAGES val:22 [ 65.342083] BUG: Bad rss-counter state mm:000000006ea54db0 type:MM_FILEPAGES val:33 [ 65.343356] BUG: Bad rss-counter state mm:000000006ea54db0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51502' (ECDSA) to the list of known hosts. 2023/06/19 15:24:44 fuzzer started 2023/06/19 15:24:44 dialing manager at localhost:44161 2023/06/19 15:24:44 checking machine... 2023/06/19 15:24:44 checking revisions... [ 66.033452] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:24:44 testing simple program... [ 66.087465] cgroup: Unknown subsys name 'net' [ 66.132960] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:24:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ca22638 RCX=ffffffff812e00e5 RDX=1ffff11001944560 RSI=ffffffff87b86f80 RDI=ffff88800ca22b00 RBP=ffff88800ca22720 RSP=ffff88800ee078b8 R8 =0000000000000001 R9 =ffffed1001dc0f05 R10=0000000000000003 R11=00000000000b6996 R12=0000000000000287 R13=ffff88800ca22af8 R14=ffffffff83677d2f R15=ffff88800d967980 RIP=ffffffff8451365a 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 00007f2103b43700 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=00007f614bc6bc80 CR3=000000000c89c000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30333434352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303334 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110018285fc RSI=ffffffff81b3b2af RDI=ffff88800c142a78 RBP=ffff88800eac7e18 RSP=ffff88800eac7d48 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800eac7e98 R13=0000000000000008 R14=ffff88800c142a50 R15=00000000000007ff RIP=ffffffff81b3b2e2 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 00007f44f925e900 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=00007f44f98160b0 CR3=000000001a078000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000