syzkaller login: [ 64.525078] BUG: Bad rss-counter state mm:00000000f816fce7 type:MM_FILEPAGES val:33 [ 64.526695] BUG: Bad rss-counter state mm:00000000f816fce7 type:MM_ANONPAGES val:22 [ 64.698755] ================================================================== [ 64.699882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.700873] Read of size 8 at addr ffff888018db7df0 by task sshd/224 [ 64.701728] [ 64.701953] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.702824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.703822] Call Trace: [ 64.704143] [ 64.704426] dump_stack_lvl+0x91/0xf0 [ 64.704918] print_report+0xcc/0x620 [ 64.705400] ? __virt_addr_valid+0x102/0x340 [ 64.705959] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.706575] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.707194] kasan_report+0xbe/0xf0 [ 64.707704] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.708328] vma_interval_tree_remove+0xc75/0xec0 [ 64.708932] vma_prepare+0xc54/0x11a0 [ 64.709413] __split_vma+0x5af/0x950 [ 64.709880] ? __pfx___split_vma+0x10/0x10 [ 64.710418] ? find_held_lock+0x2c/0x110 [ 64.710947] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.711522] ? lock_is_held_type+0x9f/0x120 [ 64.712059] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.712665] ? mtree_range_walk+0x632/0x900 [ 64.713221] ? mas_walk+0x5c7/0x7c0 [ 64.713700] do_vmi_munmap+0x1f1/0x2b0 [ 64.714197] mmap_region+0x1f9/0x2660 [ 64.714692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.715212] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.715938] ? __pfx_lock_acquire+0x10/0x10 [ 64.716482] ? __pfx_mmap_region+0x10/0x10 [ 64.717013] ? security_mmap_addr+0x7d/0xa0 [ 64.717548] ? get_unmapped_area+0x1f5/0x3f0 [ 64.718102] do_mmap+0x854/0xf00 [ 64.718548] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.719048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.719640] ksys_mmap_pgoff+0x3af/0x500 [ 64.720153] do_syscall_64+0x3f/0x90 [ 64.720643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.721288] RIP: 0033:0x7f003a887d82 [ 64.721750] 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 [ 64.723872] RSP: 002b:00007fff99f3f838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.724775] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f003a887d82 [ 64.725620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0039cc1000 [ 64.726470] RBP: 00007f0039cc1000 R08: 0000000000000009 R09: 0000000000001000 [ 64.727318] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559dde3add90 [ 64.728202] R13: 00007fff99f3f850 R14: 00007fff99f3f880 R15: 00007fff99f3fbe0 [ 64.729054] [ 64.729359] [ 64.729575] Allocated by task 214: [ 64.730011] kasan_save_stack+0x22/0x50 [ 64.730512] kasan_set_track+0x25/0x30 [ 64.731006] __kasan_slab_alloc+0x59/0x70 [ 64.731545] kmem_cache_alloc+0x16b/0x370 [ 64.732069] vm_area_dup+0x20/0x160 [ 64.732524] __split_vma+0x170/0x950 [ 64.732993] split_vma+0xc6/0x110 [ 64.733434] mprotect_fixup+0x8d2/0xb30 [ 64.733940] do_mprotect_pkey+0x87e/0xd40 [ 64.734471] __x64_sys_mprotect+0x78/0xc0 [ 64.734995] do_syscall_64+0x3f/0x90 [ 64.735475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.736122] [ 64.736336] Freed by task 214: [ 64.736732] kasan_save_stack+0x22/0x50 [ 64.737237] kasan_set_track+0x25/0x30 [ 64.737733] kasan_save_free_info+0x2b/0x50 [ 64.738276] __kasan_slab_free+0x10a/0x190 [ 64.738819] kmem_cache_free+0x10d/0x4d0 [ 64.739334] rcu_core+0x8c8/0x2860 [ 64.739800] __do_softirq+0x1b7/0x7d4 [ 64.740288] [ 64.740505] Last potentially related work creation: [ 64.741086] kasan_save_stack+0x22/0x50 [ 64.741587] __kasan_record_aux_stack+0x8e/0xa0 [ 64.742164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.742821] remove_vma+0x139/0x170 [ 64.743271] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.743848] do_vmi_munmap+0x1f1/0x2b0 [ 64.744328] __vm_munmap+0x138/0x3a0 [ 64.744802] __x64_sys_munmap+0x59/0x80 [ 64.745301] do_syscall_64+0x3f/0x90 [ 64.745776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.746416] [ 64.746632] The buggy address belongs to the object at ffff888018db7d98 [ 64.746632] which belongs to the cache vm_area_struct of size 168 [ 64.748130] The buggy address is located 88 bytes inside of [ 64.748130] freed 168-byte region [ffff888018db7d98, ffff888018db7e40) [ 64.749536] [ 64.749752] The buggy address belongs to the physical page: [ 64.750418] page:00000000946ed09e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18db7 [ 64.751512] memcg:ffff888016a83b01 [ 64.751946] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.752597] page_type: 0xffffffff() [ 64.753046] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 64.753989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a83b01 [ 64.754875] page dumped because: kasan: bad access detected [ 64.755530] [ 64.755740] Memory state around the buggy address: [ 64.756311] ffff888018db7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 64.757146] ffff888018db7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 64.757979] >ffff888018db7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 64.758812] ^ [ 64.759616] ffff888018db7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 64.760465] ffff888018db7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.761302] ================================================================== [ 64.762242] Disabling lock debugging due to kernel taint [ 66.617941] BUG: Bad rss-counter state mm:000000008919362b type:MM_FILEPAGES val:33 [ 66.618928] BUG: Bad rss-counter state mm:000000008919362b type:MM_ANONPAGES val:22 [ 67.189142] BUG: Bad rss-counter state mm:00000000ec1e7afb type:MM_FILEPAGES val:33 [ 67.190378] BUG: Bad rss-counter state mm:00000000ec1e7afb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54700' (ECDSA) to the list of known hosts. 2023/06/19 23:53:21 fuzzer started 2023/06/19 23:53:22 dialing manager at localhost:44161 2023/06/19 23:53:22 checking machine... 2023/06/19 23:53:22 checking revisions... [ 67.856896] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:53:22 testing simple program... [ 67.905231] cgroup: Unknown subsys name 'net' [ 67.940451] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:53:16 Registers: info registers vcpu 0 RAX=ffffffff815a7556 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffffffff852be698 RBP=ffff8880145c7d28 RSP=ffff8880145c7c60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000bf R13=ffff8880145c7d60 R14=00000000000000bf R15=ffffc90000642058 RIP=ffffffff815a7556 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 00007fef666f2900 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=00007fef65b58330 CR3=000000000d9fc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=16d532f02772726700000000000ae988 XMM05=18a0211b1622107e0000000000134f50 XMM06=00c3ffa147b8d8570000000000133d40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fea531240b0 CR3=000000000eab8000 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=33353a3332203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000