syzkaller login: [ 38.926205] BUG: Bad rss-counter state mm:0000000010fc57e9 type:MM_FILEPAGES val:33 [ 38.927978] BUG: Bad rss-counter state mm:0000000010fc57e9 type:MM_ANONPAGES val:22 [ 39.096212] ================================================================== [ 39.097177] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.098184] Read of size 8 at addr ffff888018e98058 by task sshd/219 [ 39.099004] [ 39.099325] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.100294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.101329] Call Trace: [ 39.101694] [ 39.101998] dump_stack_lvl+0x91/0xf0 [ 39.102536] print_report+0xcc/0x620 [ 39.103050] ? __virt_addr_valid+0x102/0x340 [ 39.103669] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.104329] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.104993] kasan_report+0xbe/0xf0 [ 39.105501] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.106171] vma_interval_tree_remove+0xc75/0xec0 [ 39.106814] vma_prepare+0xc54/0x11a0 [ 39.107337] __split_vma+0x5af/0x950 [ 39.107840] ? __pfx___split_vma+0x10/0x10 [ 39.108404] ? find_held_lock+0x2c/0x110 [ 39.108964] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.109572] ? lock_is_held_type+0x9f/0x120 [ 39.110153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.110808] ? mtree_range_walk+0x632/0x900 [ 39.111408] ? mas_walk+0x5c7/0x7c0 [ 39.111915] do_vmi_munmap+0x1f1/0x2b0 [ 39.112443] mmap_region+0x1f9/0x2660 [ 39.112958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.113503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.114263] ? __pfx_lock_acquire+0x10/0x10 [ 39.114829] ? __pfx_mmap_region+0x10/0x10 [ 39.115407] ? security_mmap_addr+0x7d/0xa0 [ 39.115974] ? get_unmapped_area+0x1f5/0x3f0 [ 39.116562] do_mmap+0x854/0xf00 [ 39.117028] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.117551] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.118154] ksys_mmap_pgoff+0x3af/0x500 [ 39.118692] do_syscall_64+0x3f/0x90 [ 39.119212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.119908] RIP: 0033:0x7f017faa8d82 [ 39.120392] 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 [ 39.122669] RSP: 002b:00007ffc4edea418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.123654] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f017faa8d82 [ 39.124554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f017eee2000 [ 39.125450] RBP: 00007f017eee2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.126356] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563276a2cec0 [ 39.127351] R13: 00007ffc4edea430 R14: 00007ffc4edea460 R15: 00007ffc4edea7c0 [ 39.128382] [ 39.128738] [ 39.128996] Allocated by task 212: [ 39.129517] kasan_save_stack+0x22/0x50 [ 39.130115] kasan_set_track+0x25/0x30 [ 39.130708] __kasan_slab_alloc+0x59/0x70 [ 39.131350] kmem_cache_alloc+0x16b/0x370 [ 39.131971] vm_area_dup+0x20/0x160 [ 39.132515] __split_vma+0x170/0x950 [ 39.133068] split_vma+0xc6/0x110 [ 39.133588] mprotect_fixup+0x8d2/0xb30 [ 39.134187] do_mprotect_pkey+0x87e/0xd40 [ 39.134811] __x64_sys_mprotect+0x78/0xc0 [ 39.135463] do_syscall_64+0x3f/0x90 [ 39.135977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.136667] [ 39.136895] Freed by task 212: [ 39.137311] kasan_save_stack+0x22/0x50 [ 39.137845] kasan_set_track+0x25/0x30 [ 39.138379] kasan_save_free_info+0x2b/0x50 [ 39.138946] __kasan_slab_free+0x10a/0x190 [ 39.139526] kmem_cache_free+0x10d/0x4d0 [ 39.140069] rcu_core+0x8c8/0x2860 [ 39.140590] __do_softirq+0x1b7/0x7d4 [ 39.141117] [ 39.141346] Last potentially related work creation: [ 39.141971] kasan_save_stack+0x22/0x50 [ 39.142504] __kasan_record_aux_stack+0x8e/0xa0 [ 39.143152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.143839] remove_vma+0x139/0x170 [ 39.144322] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.144996] do_vmi_munmap+0x1f1/0x2b0 [ 39.145576] __vm_munmap+0x138/0x3a0 [ 39.146163] __x64_sys_munmap+0x59/0x80 [ 39.146698] do_syscall_64+0x3f/0x90 [ 39.147256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.147964] [ 39.148193] The buggy address belongs to the object at ffff888018e98000 [ 39.148193] which belongs to the cache vm_area_struct of size 168 [ 39.149772] The buggy address is located 88 bytes inside of [ 39.149772] freed 168-byte region [ffff888018e98000, ffff888018e980a8) [ 39.151306] [ 39.151537] The buggy address belongs to the physical page: [ 39.152238] page:00000000496db790 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e98 [ 39.153407] memcg:ffff88800ee12501 [ 39.153861] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.154546] page_type: 0xffffffff() [ 39.155025] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.156006] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee12501 [ 39.157007] page dumped because: kasan: bad access detected [ 39.157725] [ 39.157963] Memory state around the buggy address: [ 39.158608] ffff888018e97f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.159576] ffff888018e97f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.160523] >ffff888018e98000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.161469] ^ [ 39.162275] ffff888018e98080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.163225] ffff888018e98100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.164173] ================================================================== [ 39.165409] Disabling lock debugging due to kernel taint [ 41.312167] BUG: Bad rss-counter state mm:000000009caf581d type:MM_FILEPAGES val:33 [ 41.313323] BUG: Bad rss-counter state mm:000000009caf581d type:MM_ANONPAGES val:22 [ 41.897900] BUG: Bad rss-counter state mm:00000000242103a0 type:MM_FILEPAGES val:33 [ 41.898894] BUG: Bad rss-counter state mm:00000000242103a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5889' (ECDSA) to the list of known hosts. 2023/06/21 10:41:42 fuzzer started 2023/06/21 10:41:43 dialing manager at localhost:36067 2023/06/21 10:41:43 checking machine... 2023/06/21 10:41:43 checking revisions... [ 42.557439] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:41:43 testing simple program... [ 42.596845] cgroup: Unknown subsys name 'net' [ 42.646296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:41:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc38945a98 CR3=0000000009552000 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=2032343a31343a3031203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a31343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=0000000000000003 RCX=ffffffff813bff8c RDX=ffff88800e4f1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88806cf09e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=ffff88806cf09ff8 R12=0000000000000046 R13=ffff88806cf2b940 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff813bff8c 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 00007f8d36b87900 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=00007f8d3713c650 CR3=000000000e16e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000