syzkaller login: [ 31.885231] BUG: Bad rss-counter state mm:00000000e6c5839d type:MM_FILEPAGES val:33 [ 31.886270] BUG: Bad rss-counter state mm:00000000e6c5839d type:MM_ANONPAGES val:22 [ 32.042480] ================================================================== [ 32.043426] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.044402] Read of size 8 at addr ffff888016a7ea50 by task sshd/220 [ 32.045181] [ 32.045404] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.046394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.047387] Call Trace: [ 32.047711] [ 32.048024] dump_stack_lvl+0x91/0xf0 [ 32.048530] print_report+0xcc/0x620 [ 32.049026] ? __virt_addr_valid+0x102/0x340 [ 32.049590] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.050248] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.050874] kasan_report+0xbe/0xf0 [ 32.051380] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.052024] vma_interval_tree_remove+0xc75/0xec0 [ 32.052644] vma_prepare+0xc54/0x11a0 [ 32.053136] __split_vma+0x5af/0x950 [ 32.053611] ? __pfx___split_vma+0x10/0x10 [ 32.054162] ? find_held_lock+0x2c/0x110 [ 32.054720] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.055328] ? lock_is_held_type+0x9f/0x120 [ 32.055873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.056510] ? mtree_range_walk+0x632/0x900 [ 32.057085] ? mas_walk+0x5c7/0x7c0 [ 32.057566] do_vmi_munmap+0x1f1/0x2b0 [ 32.058082] mmap_region+0x1f9/0x2660 [ 32.058596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.059145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.059885] ? __pfx_lock_acquire+0x10/0x10 [ 32.060446] ? __pfx_mmap_region+0x10/0x10 [ 32.061014] ? security_mmap_addr+0x7d/0xa0 [ 32.061570] ? get_unmapped_area+0x1f5/0x3f0 [ 32.062154] do_mmap+0x854/0xf00 [ 32.062635] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.063168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.063741] ksys_mmap_pgoff+0x3af/0x500 [ 32.064267] do_syscall_64+0x3f/0x90 [ 32.064757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.065428] RIP: 0033:0x7f9db4d3cd82 [ 32.065885] 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 [ 32.068093] RSP: 002b:00007fffeb9dd528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.069024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9db4d3cd82 [ 32.069877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9db4176000 [ 32.070751] RBP: 00007f9db4176000 R08: 0000000000000009 R09: 0000000000001000 [ 32.071629] R10: 0000000000000812 R11: 0000000000000206 R12: 000056352d044ec0 [ 32.072490] R13: 00007fffeb9dd540 R14: 00007fffeb9dd570 R15: 00007fffeb9dd8d0 [ 32.073380] [ 32.073677] [ 32.073895] Allocated by task 213: [ 32.074366] kasan_save_stack+0x22/0x50 [ 32.074877] kasan_set_track+0x25/0x30 [ 32.075387] __kasan_slab_alloc+0x59/0x70 [ 32.075914] kmem_cache_alloc+0x16b/0x370 [ 32.076456] vm_area_dup+0x20/0x160 [ 32.076924] __split_vma+0x170/0x950 [ 32.077416] split_vma+0xc6/0x110 [ 32.077864] mprotect_fixup+0x8d2/0xb30 [ 32.078400] do_mprotect_pkey+0x87e/0xd40 [ 32.078933] __x64_sys_mprotect+0x78/0xc0 [ 32.079476] do_syscall_64+0x3f/0x90 [ 32.079958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.080632] [ 32.080852] Freed by task 213: [ 32.081277] kasan_save_stack+0x22/0x50 [ 32.081786] kasan_set_track+0x25/0x30 [ 32.082307] kasan_save_free_info+0x2b/0x50 [ 32.082853] __kasan_slab_free+0x10a/0x190 [ 32.083401] kmem_cache_free+0x10d/0x4d0 [ 32.083913] rcu_core+0x8c8/0x2860 [ 32.084369] __do_softirq+0x1b7/0x7d4 [ 32.084848] [ 32.085095] Last potentially related work creation: [ 32.085694] kasan_save_stack+0x22/0x50 [ 32.086235] __kasan_record_aux_stack+0x8e/0xa0 [ 32.086874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.087535] remove_vma+0x139/0x170 [ 32.088005] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.088574] do_vmi_munmap+0x1f1/0x2b0 [ 32.089091] __vm_munmap+0x138/0x3a0 [ 32.089575] __x64_sys_munmap+0x59/0x80 [ 32.090096] do_syscall_64+0x3f/0x90 [ 32.090603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.091255] [ 32.091474] The buggy address belongs to the object at ffff888016a7e9f8 [ 32.091474] which belongs to the cache vm_area_struct of size 168 [ 32.092972] The buggy address is located 88 bytes inside of [ 32.092972] freed 168-byte region [ffff888016a7e9f8, ffff888016a7eaa0) [ 32.094503] [ 32.094719] The buggy address belongs to the physical page: [ 32.095399] page:00000000276d35bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a7e [ 32.096557] memcg:ffff88800ef30801 [ 32.097008] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.097681] page_type: 0xffffffff() [ 32.098172] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.099131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef30801 [ 32.100062] page dumped because: kasan: bad access detected [ 32.100746] [ 32.100969] Memory state around the buggy address: [ 32.101563] ffff888016a7e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.102468] ffff888016a7e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.103340] >ffff888016a7ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.104230] ^ [ 32.104931] ffff888016a7ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.105813] ffff888016a7eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.106695] ================================================================== [ 32.107715] Disabling lock debugging due to kernel taint [ 34.206253] BUG: Bad rss-counter state mm:0000000021b9af80 type:MM_FILEPAGES val:33 [ 34.207686] BUG: Bad rss-counter state mm:0000000021b9af80 type:MM_ANONPAGES val:22 [ 34.698089] BUG: Bad rss-counter state mm:000000005718d279 type:MM_FILEPAGES val:33 [ 34.699276] BUG: Bad rss-counter state mm:000000005718d279 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48339' (ECDSA) to the list of known hosts. 2023/06/20 05:44:20 fuzzer started 2023/06/20 05:44:20 dialing manager at localhost:44161 2023/06/20 05:44:20 checking machine... 2023/06/20 05:44:20 checking revisions... [ 35.372897] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:44:20 testing simple program... [ 35.413750] cgroup: Unknown subsys name 'net' [ 35.470537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:44:19 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff854f6380 RCX=0000000000000000 RDX=1ffff11001205b82 RSI=ffffffff811f78e5 RDI=ffff88800902dc18 RBP=ffff88800902dc10 RSP=ffff88801d1b7bb8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000000000e5 R13=ffff88800902db40 R14=0000000000000019 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007f848d41d900 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=00007ffef6992000 CR3=000000001b150000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fd84cac0050 CR3=000000000c502000 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=ec20096d6bb3bc94a64fea8c9250c198 XMM02=2c67c8bc2e329bc3000000000011ce08 XMM03=fb795ef6d65770560000000000124788 XMM04=7bc937a76eedb44f00000000000ae988 XMM05=19e9129bd510f2350000000000134328 XMM06=2aac1c04704525f40000000000133190 XMM07=e042d86d42eb936e0000000000124a08 XMM08=dfcb7f9a0737fcd3000000000011ce68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000