syzkaller login: [ 32.174817] BUG: Bad rss-counter state mm:000000004687546f type:MM_FILEPAGES val:33 [ 32.175521] BUG: Bad rss-counter state mm:000000004687546f type:MM_ANONPAGES val:22 [ 32.365459] ================================================================== [ 32.366027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.366620] Read of size 8 at addr ffff888018693df0 by task sshd/221 [ 32.367101] [ 32.367241] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.367777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.368390] Call Trace: [ 32.368595] [ 32.368775] dump_stack_lvl+0x91/0xf0 [ 32.370076] print_report+0xcc/0x620 [ 32.370410] ? __virt_addr_valid+0x102/0x340 [ 32.370779] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.371162] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.371579] kasan_report+0xbe/0xf0 [ 32.371875] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.372259] vma_interval_tree_remove+0xc75/0xec0 [ 32.372681] vma_prepare+0xc54/0x11a0 [ 32.373000] __split_vma+0x5af/0x950 [ 32.373316] ? __pfx___split_vma+0x10/0x10 [ 32.373671] ? find_held_lock+0x2c/0x110 [ 32.374000] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.374369] ? lock_is_held_type+0x9f/0x120 [ 32.374759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.375166] ? mtree_range_walk+0x632/0x900 [ 32.375554] ? mas_walk+0x5c7/0x7c0 [ 32.375859] do_vmi_munmap+0x1f1/0x2b0 [ 32.376182] mmap_region+0x1f9/0x2660 [ 32.376512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.376873] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.377344] ? __pfx_lock_acquire+0x10/0x10 [ 32.377732] ? __pfx_mmap_region+0x10/0x10 [ 32.378068] ? security_mmap_addr+0x7d/0xa0 [ 32.378449] ? get_unmapped_area+0x1f5/0x3f0 [ 32.378800] do_mmap+0x854/0xf00 [ 32.379084] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.379429] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.379808] ksys_mmap_pgoff+0x3af/0x500 [ 32.380141] do_syscall_64+0x3f/0x90 [ 32.380485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.380948] RIP: 0033:0x7f5cc467fd82 [ 32.381264] 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 [ 32.382707] RSP: 002b:00007ffd5fde5898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.383287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5cc467fd82 [ 32.383830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5cc3ab9000 [ 32.384395] RBP: 00007f5cc3ab9000 R08: 0000000000000009 R09: 0000000000001000 [ 32.384968] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee8f6dcec0 [ 32.385492] R13: 00007ffd5fde58b0 R14: 00007ffd5fde58e0 R15: 00007ffd5fde5c40 [ 32.386021] [ 32.386203] [ 32.386343] Allocated by task 214: [ 32.386651] kasan_save_stack+0x22/0x50 [ 32.386968] kasan_set_track+0x25/0x30 [ 32.387287] __kasan_slab_alloc+0x59/0x70 [ 32.387636] kmem_cache_alloc+0x16b/0x370 [ 32.387958] vm_area_dup+0x20/0x160 [ 32.388243] __split_vma+0x170/0x950 [ 32.388580] split_vma+0xc6/0x110 [ 32.388857] mprotect_fixup+0x8d2/0xb30 [ 32.389187] do_mprotect_pkey+0x87e/0xd40 [ 32.389544] __x64_sys_mprotect+0x78/0xc0 [ 32.389867] do_syscall_64+0x3f/0x90 [ 32.390159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.390605] [ 32.390741] Freed by task 0: [ 32.390975] kasan_save_stack+0x22/0x50 [ 32.391303] kasan_set_track+0x25/0x30 [ 32.391632] kasan_save_free_info+0x2b/0x50 [ 32.391963] __kasan_slab_free+0x10a/0x190 [ 32.392297] kmem_cache_free+0x10d/0x4d0 [ 32.392706] rcu_core+0x8c8/0x2860 [ 32.392993] __do_softirq+0x1b7/0x7d4 [ 32.393324] [ 32.393483] Last potentially related work creation: [ 32.393850] kasan_save_stack+0x22/0x50 [ 32.394165] __kasan_record_aux_stack+0x8e/0xa0 [ 32.394539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.394955] remove_vma+0x139/0x170 [ 32.395242] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.395635] do_vmi_munmap+0x1f1/0x2b0 [ 32.395943] __vm_munmap+0x138/0x3a0 [ 32.396242] __x64_sys_munmap+0x59/0x80 [ 32.396582] do_syscall_64+0x3f/0x90 [ 32.397266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.397710] [ 32.397854] The buggy address belongs to the object at ffff888018693d98 [ 32.397854] which belongs to the cache vm_area_struct of size 168 [ 32.398808] The buggy address is located 88 bytes inside of [ 32.398808] freed 168-byte region [ffff888018693d98, ffff888018693e40) [ 32.399729] [ 32.399872] The buggy address belongs to the physical page: [ 32.400314] page:00000000761d04a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18693 [ 32.401060] memcg:ffff888018604601 [ 32.401327] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.401809] page_type: 0xffffffff() [ 32.402104] raw: 0100000000000200 ffff88800879fc80 ffffea000060f2c0 0000000000000009 [ 32.402736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018604601 [ 32.403319] page dumped because: kasan: bad access detected [ 32.403740] [ 32.403877] Memory state around the buggy address: [ 32.404235] ffff888018693c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.404811] ffff888018693d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.405404] >ffff888018693d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.405935] ^ [ 32.406455] ffff888018693e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.407015] ffff888018693e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.407573] ================================================================== [ 32.408553] Disabling lock debugging due to kernel taint [ 34.492239] BUG: Bad rss-counter state mm:00000000f7cabc9b type:MM_FILEPAGES val:33 [ 34.492991] BUG: Bad rss-counter state mm:00000000f7cabc9b type:MM_ANONPAGES val:22 [ 35.557331] BUG: Bad rss-counter state mm:00000000ecfb7efe type:MM_FILEPAGES val:33 [ 35.558857] BUG: Bad rss-counter state mm:00000000ecfb7efe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39117' (ECDSA) to the list of known hosts. 2023/06/20 10:10:13 fuzzer started 2023/06/20 10:10:13 dialing manager at localhost:44161 2023/06/20 10:10:13 checking machine... 2023/06/20 10:10:13 checking revisions... [ 36.485022] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:10:13 testing simple program... [ 36.537171] cgroup: Unknown subsys name 'net' [ 36.607191] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:10:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e82f410 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff84531da7 RDI=ffffffff81371082 RBP=0000000000000200 RSP=ffff88806ce09418 R8 =00000000b6abbac0 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff81845c80 R13=ffffea0000603e40 R14=ffffffff81ef6198 R15=0000000000000000 RIP=ffffffff81534337 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 00007fe2b98018c0 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=00007fa95d2cd650 CR3=000000000b380000 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=00005570a4ceb61000005570a4d2f270 XMM01=00000001ffffffff00005570a4ceb610 XMM02=00005570a4d22f60ffffffff00000001 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00005570a4d22f8000005570a4d22f60 XMM06=00005570a4d729400000000200000003 XMM07=00000000000000000000000000000000 XMM08=20202020203a657a697320656c696600 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e28000 RBX=ffff888008e27e78 RCX=ffffffff864b1901 RDX=ffff888008e27e80 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff888008e20000 RSP=ffff88806cf09a28 R8 =ffffffff864b19c0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e27e78 R15=ffff88806cf09a98 RIP=ffffffff81131296 RFL=00000083 [--S---C] 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=00007f9c460e0810 CR3=000000000d91e000 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=ffffffffffffffff0000000000000000 XMM02=ffffff0f0e0d0c0b0a09080706050403 XMM03=696e656420737365636341002f737973 XMM04=4c414954494e495f4345535500323736 XMM05=6765723a6d726f6674616c703d534149 XMM06=006d726f6674616c703d4d4554535953 XMM07=2f6d726f6674616c702f736563697665 XMM08=3a56000a73253a51000a73253a47000a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000