syzkaller login: [ 28.780672] BUG: Bad rss-counter state mm:000000001ebbf7d0 type:MM_FILEPAGES val:33 [ 28.782627] BUG: Bad rss-counter state mm:000000001ebbf7d0 type:MM_ANONPAGES val:22 [ 28.958817] ================================================================== [ 28.959822] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.960835] Read of size 8 at addr ffff888013f796b0 by task sshd/219 [ 28.961794] [ 28.962028] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.962984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.964110] Call Trace: [ 28.964453] [ 28.964758] dump_stack_lvl+0x91/0xf0 [ 28.965280] print_report+0xcc/0x620 [ 28.965794] ? __virt_addr_valid+0x102/0x340 [ 28.966383] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.967045] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.967745] kasan_report+0xbe/0xf0 [ 28.968273] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.968956] vma_interval_tree_remove+0xc75/0xec0 [ 28.969614] vma_prepare+0xc54/0x11a0 [ 28.970144] __split_vma+0x5af/0x950 [ 28.970677] ? __pfx___split_vma+0x10/0x10 [ 28.971272] ? find_held_lock+0x2c/0x110 [ 28.971857] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.972489] ? lock_is_held_type+0x9f/0x120 [ 28.973100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.973780] ? mtree_range_walk+0x632/0x900 [ 28.974395] ? mas_walk+0x5c7/0x7c0 [ 28.974927] do_vmi_munmap+0x1f1/0x2b0 [ 28.975505] mmap_region+0x1f9/0x2660 [ 28.976039] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.976607] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.977384] ? __pfx_lock_acquire+0x10/0x10 [ 28.977970] ? __pfx_mmap_region+0x10/0x10 [ 28.978557] ? security_mmap_addr+0x7d/0xa0 [ 28.979152] ? get_unmapped_area+0x1f5/0x3f0 [ 28.979756] do_mmap+0x854/0xf00 [ 28.980237] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.980779] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.981391] ksys_mmap_pgoff+0x3af/0x500 [ 28.981961] do_syscall_64+0x3f/0x90 [ 28.982488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.983205] RIP: 0033:0x7f5dd8049d82 [ 28.983711] 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 [ 28.986048] RSP: 002b:00007ffdfc7efda8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.987050] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5dd8049d82 [ 28.987978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5dd7483000 [ 28.988906] RBP: 00007f5dd7483000 R08: 0000000000000009 R09: 0000000000001000 [ 28.989833] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa538acec0 [ 28.990774] R13: 00007ffdfc7efdc0 R14: 00007ffdfc7efdf0 R15: 00007ffdfc7f0150 [ 28.991719] [ 28.992039] [ 28.992272] Allocated by task 212: [ 28.992745] kasan_save_stack+0x22/0x50 [ 28.993312] kasan_set_track+0x25/0x30 [ 28.993860] __kasan_slab_alloc+0x59/0x70 [ 28.994432] kmem_cache_alloc+0x16b/0x370 [ 28.995016] vm_area_dup+0x20/0x160 [ 28.995514] __split_vma+0x170/0x950 [ 28.996022] split_vma+0xc6/0x110 [ 28.996508] mprotect_fixup+0x8d2/0xb30 [ 28.997071] do_mprotect_pkey+0x87e/0xd40 [ 28.997645] __x64_sys_mprotect+0x78/0xc0 [ 28.998215] do_syscall_64+0x3f/0x90 [ 28.998732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.999446] [ 28.999677] Freed by task 212: [ 29.000096] kasan_save_stack+0x22/0x50 [ 29.000646] kasan_set_track+0x25/0x30 [ 29.001173] kasan_save_free_info+0x2b/0x50 [ 29.001756] __kasan_slab_free+0x10a/0x190 [ 29.002341] kmem_cache_free+0x10d/0x4d0 [ 29.002890] rcu_core+0x8c8/0x2860 [ 29.003399] __do_softirq+0x1b7/0x7d4 [ 29.003915] [ 29.004148] Last potentially related work creation: [ 29.004783] kasan_save_stack+0x22/0x50 [ 29.005327] __kasan_record_aux_stack+0x8e/0xa0 [ 29.005942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.006631] remove_vma+0x139/0x170 [ 29.007136] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.007746] do_vmi_munmap+0x1f1/0x2b0 [ 29.008274] __vm_munmap+0x138/0x3a0 [ 29.008779] __x64_sys_munmap+0x59/0x80 [ 29.009311] do_syscall_64+0x3f/0x90 [ 29.009829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.010524] [ 29.010756] The buggy address belongs to the object at ffff888013f79658 [ 29.010756] which belongs to the cache vm_area_struct of size 168 [ 29.012381] The buggy address is located 88 bytes inside of [ 29.012381] freed 168-byte region [ffff888013f79658, ffff888013f79700) [ 29.013905] [ 29.014136] The buggy address belongs to the physical page: [ 29.014899] page:00000000cf20dcfc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13f79 [ 29.016102] memcg:ffff888015abc501 [ 29.016561] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.017249] page_type: 0xffffffff() [ 29.017729] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.018714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015abc501 [ 29.019690] page dumped because: kasan: bad access detected [ 29.020391] [ 29.020621] Memory state around the buggy address: [ 29.021236] ffff888013f79580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.022145] ffff888013f79600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.023061] >ffff888013f79680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.023958] ^ [ 29.024577] ffff888013f79700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.025482] ffff888013f79780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.026381] ================================================================== [ 29.027670] Disabling lock debugging due to kernel taint [ 31.987689] BUG: Bad rss-counter state mm:00000000a671c5fa type:MM_FILEPAGES val:33 [ 31.988925] BUG: Bad rss-counter state mm:00000000a671c5fa type:MM_ANONPAGES val:22 [ 32.389591] BUG: Bad rss-counter state mm:00000000a10303f5 type:MM_FILEPAGES val:33 [ 32.390810] BUG: Bad rss-counter state mm:00000000a10303f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57242' (ECDSA) to the list of known hosts. 2023/06/20 13:19:24 fuzzer started 2023/06/20 13:19:25 dialing manager at localhost:36067 2023/06/20 13:19:25 checking machine... 2023/06/20 13:19:25 checking revisions... [ 33.138302] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:19:25 testing simple program... [ 33.179779] cgroup: Unknown subsys name 'net' [ 33.225390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:19:24 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=00007fdf31727650 CR3=000000000939c000 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=2034323a39313a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a39313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88800ef4fe20 RCX=0000000080000000 RDX=ffff8880167c3680 RSI=ffffffff81716925 RDI=ffff88800ef4fe20 RBP=00007fff45cc2000 RSP=ffff88800ef4fd88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=00007fff45cc2000 R14=0000000000000040 R15=ffff888016fe8000 RIP=ffffffff814c086d RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdf31172900 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=00007fff45cc2000 CR3=0000000016a1a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=10d02ea29a8c42822070977eef71aedd XMM05=000000000000000000000000000000ff XMM06=02552e4d383511412070517ebd714700 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000