syzkaller login: [ 62.782044] BUG: Bad rss-counter state mm:0000000052b3cd5f type:MM_FILEPAGES val:33 [ 62.783796] BUG: Bad rss-counter state mm:0000000052b3cd5f type:MM_ANONPAGES val:22 [ 62.939353] ================================================================== [ 62.940444] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.941572] Read of size 8 at addr ffff88800caa3df0 by task sshd/219 [ 62.942646] [ 62.942909] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.943952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.945169] Call Trace: [ 62.945561] [ 62.945918] dump_stack_lvl+0x91/0xf0 [ 62.946500] print_report+0xcc/0x620 [ 62.947078] ? __virt_addr_valid+0x102/0x340 [ 62.947745] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.948498] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.949247] kasan_report+0xbe/0xf0 [ 62.949824] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.950568] vma_interval_tree_remove+0xc75/0xec0 [ 62.951300] vma_prepare+0xc54/0x11a0 [ 62.951869] __split_vma+0x5af/0x950 [ 62.952431] ? __pfx___split_vma+0x10/0x10 [ 62.953074] ? find_held_lock+0x2c/0x110 [ 62.953716] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.954389] ? lock_is_held_type+0x9f/0x120 [ 62.955037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.955775] ? mtree_range_walk+0x632/0x900 [ 62.956437] ? mas_walk+0x5c7/0x7c0 [ 62.956995] do_vmi_munmap+0x1f1/0x2b0 [ 62.957605] mmap_region+0x1f9/0x2660 [ 62.958196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.958818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.959682] ? __pfx_lock_acquire+0x10/0x10 [ 62.960314] ? __pfx_mmap_region+0x10/0x10 [ 62.960950] ? security_mmap_addr+0x7d/0xa0 [ 62.961593] ? get_unmapped_area+0x1f5/0x3f0 [ 62.962251] do_mmap+0x854/0xf00 [ 62.962771] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.963365] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.964041] ksys_mmap_pgoff+0x3af/0x500 [ 62.964654] do_syscall_64+0x3f/0x90 [ 62.965232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.966030] RIP: 0033:0x7f6c4878ad82 [ 62.966594] 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 [ 62.969191] RSP: 002b:00007ffd1a4463c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.970300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c4878ad82 [ 62.971337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c47bc4000 [ 62.972381] RBP: 00007f6c47bc4000 R08: 0000000000000009 R09: 0000000000001000 [ 62.973404] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565227d7bec0 [ 62.974429] R13: 00007ffd1a4463e0 R14: 00007ffd1a446410 R15: 00007ffd1a446770 [ 62.975467] [ 62.975819] [ 62.976080] Allocated by task 212: [ 62.976607] kasan_save_stack+0x22/0x50 [ 62.977210] kasan_set_track+0x25/0x30 [ 62.977822] __kasan_slab_alloc+0x59/0x70 [ 62.978449] kmem_cache_alloc+0x16b/0x370 [ 62.979066] vm_area_dup+0x20/0x160 [ 62.979625] __split_vma+0x170/0x950 [ 62.980179] split_vma+0xc6/0x110 [ 62.980712] mprotect_fixup+0x8d2/0xb30 [ 62.981319] do_mprotect_pkey+0x87e/0xd40 [ 62.981963] __x64_sys_mprotect+0x78/0xc0 [ 62.982586] do_syscall_64+0x3f/0x90 [ 62.983154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.983932] [ 62.984192] Freed by task 212: [ 62.984670] kasan_save_stack+0x22/0x50 [ 62.985277] kasan_set_track+0x25/0x30 [ 62.985889] kasan_save_free_info+0x2b/0x50 [ 62.986527] __kasan_slab_free+0x10a/0x190 [ 62.987167] kmem_cache_free+0x10d/0x4d0 [ 62.987768] rcu_core+0x8c8/0x2860 [ 62.988297] __do_softirq+0x1b7/0x7d4 [ 62.988858] [ 62.989116] Last potentially related work creation: [ 62.989831] kasan_save_stack+0x22/0x50 [ 62.990436] __kasan_record_aux_stack+0x8e/0xa0 [ 62.991140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.991919] remove_vma+0x139/0x170 [ 62.992461] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.993140] do_vmi_munmap+0x1f1/0x2b0 [ 62.993726] __vm_munmap+0x138/0x3a0 [ 62.994175] __x64_sys_munmap+0x59/0x80 [ 62.994649] do_syscall_64+0x3f/0x90 [ 62.995095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.995704] [ 62.995914] The buggy address belongs to the object at ffff88800caa3d98 [ 62.995914] which belongs to the cache vm_area_struct of size 168 [ 62.997296] The buggy address is located 88 bytes inside of [ 62.997296] freed 168-byte region [ffff88800caa3d98, ffff88800caa3e40) [ 62.998632] [ 62.998837] The buggy address belongs to the physical page: [ 62.999457] page:000000009dafd1ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaa3 [ 63.000470] memcg:ffff88800c46fc01 [ 63.000871] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.001485] page_type: 0xffffffff() [ 63.001915] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.002778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c46fc01 [ 63.003667] page dumped because: kasan: bad access detected [ 63.004321] [ 63.004532] Memory state around the buggy address: [ 63.005108] ffff88800caa3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 63.005978] ffff88800caa3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 63.006834] >ffff88800caa3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 63.007670] ^ [ 63.008471] ffff88800caa3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 63.009295] ffff88800caa3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.010147] ================================================================== [ 63.011099] Disabling lock debugging due to kernel taint [ 64.875218] BUG: Bad rss-counter state mm:0000000083e29373 type:MM_FILEPAGES val:33 [ 64.876452] BUG: Bad rss-counter state mm:0000000083e29373 type:MM_ANONPAGES val:22 [ 65.329486] BUG: Bad rss-counter state mm:000000009170c0ea type:MM_FILEPAGES val:33 [ 65.330557] BUG: Bad rss-counter state mm:000000009170c0ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20580' (ECDSA) to the list of known hosts. 2023/06/20 07:07:21 fuzzer started 2023/06/20 07:07:21 dialing manager at localhost:44161 2023/06/20 07:07:21 checking machine... 2023/06/20 07:07:21 checking revisions... [ 66.060023] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:07:21 testing simple program... [ 66.116061] cgroup: Unknown subsys name 'net' [ 66.162900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:07:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab4224 RDI=ffff888018e603f4 RBP=ffff888018e60000 RSP=ffff88800d04f4d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000161000001610 R12=0000000000000000 R13=00000000000000d7 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff81374491 RFL=00000217 [----APC] 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 00007ffab4e43900 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=00007ffab53fa618 CR3=000000000e982000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffd4d340cf8 CR3=000000000dc6a000 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=2030323a37303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a37303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000