syzkaller login: [ 31.024939] BUG: Bad rss-counter state mm:000000004ea6d7fe type:MM_FILEPAGES val:33 [ 31.026181] BUG: Bad rss-counter state mm:000000004ea6d7fe type:MM_ANONPAGES val:22 [ 31.064900] ================================================================== [ 31.066071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.067258] Read of size 8 at addr ffff88801805c228 by task sshd/221 [ 31.068269] [ 31.068523] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.069641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.070911] Call Trace: [ 31.071270] [ 31.071586] dump_stack_lvl+0x91/0xf0 [ 31.072246] print_report+0xcc/0x620 [ 31.072801] ? __virt_addr_valid+0x102/0x340 [ 31.073417] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074165] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074964] kasan_report+0xbe/0xf0 [ 31.075607] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.076366] vma_interval_tree_remove+0xc75/0xec0 [ 31.077115] vma_prepare+0xc54/0x11a0 [ 31.077743] __split_vma+0x5af/0x950 [ 31.078415] ? __pfx___split_vma+0x10/0x10 [ 31.079007] ? find_held_lock+0x2c/0x110 [ 31.079585] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.080208] ? lock_is_held_type+0x9f/0x120 [ 31.080808] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.081482] ? mtree_range_walk+0x632/0x900 [ 31.082100] ? mas_walk+0x5c7/0x7c0 [ 31.082642] do_vmi_munmap+0x1f1/0x2b0 [ 31.083191] mmap_region+0x1f9/0x2660 [ 31.083731] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.084296] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.085089] ? __pfx_lock_acquire+0x10/0x10 [ 31.085681] ? __pfx_mmap_region+0x10/0x10 [ 31.086272] ? security_mmap_addr+0x7d/0xa0 [ 31.086874] ? get_unmapped_area+0x1f5/0x3f0 [ 31.087485] do_mmap+0x854/0xf00 [ 31.087970] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.088518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.089138] ksys_mmap_pgoff+0x3af/0x500 [ 31.089701] do_syscall_64+0x3f/0x90 [ 31.090236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.090977] RIP: 0033:0x7f67fc927d82 [ 31.091484] 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 [ 31.094068] RSP: 002b:00007fff59c641d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.095096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67fc927d82 [ 31.096046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67fbd61000 [ 31.096985] RBP: 00007f67fbd61000 R08: 0000000000000009 R09: 0000000000001000 [ 31.097925] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2789e0d90 [ 31.098884] R13: 00007fff59c641f0 R14: 00007fff59c64220 R15: 00007fff59c64580 [ 31.099830] [ 31.100152] [ 31.100389] Allocated by task 214: [ 31.100864] kasan_save_stack+0x22/0x50 [ 31.101422] kasan_set_track+0x25/0x30 [ 31.101972] __kasan_slab_alloc+0x59/0x70 [ 31.102567] kmem_cache_alloc+0x16b/0x370 [ 31.103138] vm_area_dup+0x20/0x160 [ 31.103645] __split_vma+0x170/0x950 [ 31.104163] split_vma+0xc6/0x110 [ 31.104648] mprotect_fixup+0x8d2/0xb30 [ 31.105201] do_mprotect_pkey+0x87e/0xd40 [ 31.105781] __x64_sys_mprotect+0x78/0xc0 [ 31.106364] do_syscall_64+0x3f/0x90 [ 31.106917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107633] [ 31.107871] Freed by task 214: [ 31.108305] kasan_save_stack+0x22/0x50 [ 31.108862] kasan_set_track+0x25/0x30 [ 31.109404] kasan_save_free_info+0x2b/0x50 [ 31.109994] __kasan_slab_free+0x10a/0x190 [ 31.110597] kmem_cache_free+0x10d/0x4d0 [ 31.111157] rcu_core+0x8c8/0x2860 [ 31.111649] __do_softirq+0x1b7/0x7d4 [ 31.112184] [ 31.112419] Last potentially related work creation: [ 31.113072] kasan_save_stack+0x22/0x50 [ 31.113631] __kasan_record_aux_stack+0x8e/0xa0 [ 31.114268] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.114989] remove_vma+0x139/0x170 [ 31.115488] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.116109] do_vmi_munmap+0x1f1/0x2b0 [ 31.116648] __vm_munmap+0x138/0x3a0 [ 31.117165] __x64_sys_munmap+0x59/0x80 [ 31.117714] do_syscall_64+0x3f/0x90 [ 31.118241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.118979] [ 31.119216] The buggy address belongs to the object at ffff88801805c1d0 [ 31.119216] which belongs to the cache vm_area_struct of size 168 [ 31.120844] The buggy address is located 88 bytes inside of [ 31.120844] freed 168-byte region [ffff88801805c1d0, ffff88801805c278) [ 31.122407] [ 31.122648] The buggy address belongs to the physical page: [ 31.123377] page:0000000085dc159e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1805c [ 31.124590] memcg:ffff88800ecfeb01 [ 31.125063] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.125778] page_type: 0xffffffff() [ 31.126277] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.127315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecfeb01 [ 31.128324] page dumped because: kasan: bad access detected [ 31.129056] [ 31.129294] Memory state around the buggy address: [ 31.129940] ffff88801805c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.130900] ffff88801805c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.131843] >ffff88801805c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.132791] ^ [ 31.133405] ffff88801805c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.134349] ffff88801805c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.135388] ================================================================== [ 31.136492] Disabling lock debugging due to kernel taint [ 34.016558] BUG: Bad rss-counter state mm:0000000041385166 type:MM_FILEPAGES val:33 [ 34.017819] BUG: Bad rss-counter state mm:0000000041385166 type:MM_ANONPAGES val:22 [ 34.457813] BUG: Bad rss-counter state mm:00000000a8724a9e type:MM_FILEPAGES val:33 [ 34.459028] BUG: Bad rss-counter state mm:00000000a8724a9e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12660' (ECDSA) to the list of known hosts. 2023/06/20 14:19:34 fuzzer started 2023/06/20 14:19:35 dialing manager at localhost:36067 2023/06/20 14:19:35 checking machine... 2023/06/20 14:19:35 checking revisions... [ 35.168452] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:19:35 testing simple program... [ 35.220884] cgroup: Unknown subsys name 'net' [ 35.291495] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:19:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce09d18 RSP=ffff88806ce09c50 R8 =0000000000000001 R9 =ffffed100d9c1396 R10=ffff88806ce09cb7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f24f96e3900 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=000055adce162318 CR3=000000000dab8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=78cea86732bb26bf00000000000ae988 XMM05=7dce68aaa890a47b0000000000132fa8 XMM06=c291bd5c70af25b90000000000132048 XMM07=fb795ef6d657705600000000001222f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc9658e868 CR3=0000000005482000 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=00007f200bdb4510000055c5c5fbe790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000