syzkaller login: [ 41.597049] BUG: Bad rss-counter state mm:00000000fa100c48 type:MM_FILEPAGES val:33 [ 41.598201] BUG: Bad rss-counter state mm:00000000fa100c48 type:MM_ANONPAGES val:22 [ 41.784574] ================================================================== [ 41.785697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.786943] Read of size 8 at addr ffff888019cbeed8 by task sshd/225 [ 41.787756] [ 41.787993] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.788913] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.790301] Call Trace: [ 41.790556] [ 41.790761] dump_stack_lvl+0x91/0xf0 [ 41.791125] print_report+0xcc/0x620 [ 41.791485] ? __virt_addr_valid+0x102/0x340 [ 41.791886] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.792337] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.792779] kasan_report+0xbe/0xf0 [ 41.793134] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.793589] vma_interval_tree_remove+0xc75/0xec0 [ 41.794020] vma_prepare+0xc54/0x11a0 [ 41.794368] __split_vma+0x5af/0x950 [ 41.794712] ? __pfx___split_vma+0x10/0x10 [ 41.795100] ? find_held_lock+0x2c/0x110 [ 41.795483] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.795891] ? lock_is_held_type+0x9f/0x120 [ 41.796279] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.796725] ? mtree_range_walk+0x632/0x900 [ 41.797137] ? mas_walk+0x5c7/0x7c0 [ 41.797486] do_vmi_munmap+0x1f1/0x2b0 [ 41.797847] mmap_region+0x1f9/0x2660 [ 41.798200] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.798579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.799092] ? __pfx_lock_acquire+0x10/0x10 [ 41.799480] ? __pfx_mmap_region+0x10/0x10 [ 41.799863] ? security_mmap_addr+0x7d/0xa0 [ 41.800251] ? get_unmapped_area+0x1f5/0x3f0 [ 41.800658] do_mmap+0x854/0xf00 [ 41.801116] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.801804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.802550] ksys_mmap_pgoff+0x3af/0x500 [ 41.803227] do_syscall_64+0x3f/0x90 [ 41.803877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.804751] RIP: 0033:0x7fb9e41ced82 [ 41.805402] 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 [ 41.808265] RSP: 002b:00007ffd5970c0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.809505] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9e41ced82 [ 41.810654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9e3608000 [ 41.811793] RBP: 00007fb9e3608000 R08: 0000000000000009 R09: 0000000000001000 [ 41.812897] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c823fff70 [ 41.813950] R13: 00007ffd5970c100 R14: 00007ffd5970c130 R15: 00007ffd5970c490 [ 41.814947] [ 41.815289] [ 41.815540] Allocated by task 218: [ 41.816041] kasan_save_stack+0x22/0x50 [ 41.816633] kasan_set_track+0x25/0x30 [ 41.817221] __kasan_slab_alloc+0x59/0x70 [ 41.817837] kmem_cache_alloc+0x16b/0x370 [ 41.818438] vm_area_dup+0x20/0x160 [ 41.818901] __split_vma+0x170/0x950 [ 41.819367] split_vma+0xc6/0x110 [ 41.819860] mprotect_fixup+0x8d2/0xb30 [ 41.820448] do_mprotect_pkey+0x87e/0xd40 [ 41.821065] __x64_sys_mprotect+0x78/0xc0 [ 41.821675] do_syscall_64+0x3f/0x90 [ 41.822216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.822895] [ 41.823108] Freed by task 203: [ 41.823507] kasan_save_stack+0x22/0x50 [ 41.824099] kasan_set_track+0x25/0x30 [ 41.824681] kasan_save_free_info+0x2b/0x50 [ 41.825319] __kasan_slab_free+0x10a/0x190 [ 41.825939] kmem_cache_free+0x10d/0x4d0 [ 41.826533] rcu_core+0x8c8/0x2860 [ 41.827054] __do_softirq+0x1b7/0x7d4 [ 41.827607] [ 41.827860] Last potentially related work creation: [ 41.828540] kasan_save_stack+0x22/0x50 [ 41.829137] __kasan_record_aux_stack+0x8e/0xa0 [ 41.829795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.830532] remove_vma+0x139/0x170 [ 41.831059] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.831711] do_vmi_munmap+0x1f1/0x2b0 [ 41.832277] __vm_munmap+0x138/0x3a0 [ 41.832784] __x64_sys_munmap+0x59/0x80 [ 41.833301] do_syscall_64+0x3f/0x90 [ 41.833817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.834570] [ 41.834820] The buggy address belongs to the object at ffff888019cbee80 [ 41.834820] which belongs to the cache vm_area_struct of size 168 [ 41.836540] The buggy address is located 88 bytes inside of [ 41.836540] freed 168-byte region [ffff888019cbee80, ffff888019cbef28) [ 41.838198] [ 41.838451] The buggy address belongs to the physical page: [ 41.839217] page:00000000c1ca19fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cbe [ 41.840351] memcg:ffff888017d45d01 [ 41.840817] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.841569] page_type: 0xffffffff() [ 41.842092] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.843079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d45d01 [ 41.844024] page dumped because: kasan: bad access detected [ 41.844754] [ 41.845007] Memory state around the buggy address: [ 41.845651] ffff888019cbed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.846591] ffff888019cbee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.847469] >ffff888019cbee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.848395] ^ [ 41.849206] ffff888019cbef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.850153] ffff888019cbef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.851044] ================================================================== [ 41.852441] Disabling lock debugging due to kernel taint [ 43.734847] BUG: Bad rss-counter state mm:00000000ab895ebb type:MM_FILEPAGES val:33 [ 43.735747] BUG: Bad rss-counter state mm:00000000ab895ebb type:MM_ANONPAGES val:22 [ 44.199434] BUG: Bad rss-counter state mm:000000008920fcc2 type:MM_FILEPAGES val:33 [ 44.200935] BUG: Bad rss-counter state mm:000000008920fcc2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41322' (ECDSA) to the list of known hosts. 2023/06/19 14:01:34 fuzzer started 2023/06/19 14:01:34 dialing manager at localhost:44161 2023/06/19 14:01:34 checking machine... 2023/06/19 14:01:34 checking revisions... [ 44.815082] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:01:34 testing simple program... [ 44.857180] cgroup: Unknown subsys name 'net' [ 44.906050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:01:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007efe9aab2000 CR3=000000000c7e4000 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=d657dac988f56e9904409ee1cbf65705 XMM02=000000000011d508eff9b2d0a8fce9cb XMM03=000000000011d5d82c67c8bc2e329bc3 XMM04=89dc00259255508100000000000ae988 XMM05=e7a3b750822471340000000000133770 XMM06=774fc9afa3e5453d0000000000132948 XMM07=e042d86d42eb936e00000000001241b8 XMM08=459e7a5a5a05edf1000000000011d5d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018e73980 RCX=ffff888018e73980 RDX=00000000000d0008 RSI=ffff888018e73980 RDI=ffff88800844f780 RBP=ffff88800c99fa28 RSP=ffff88800c99f990 R8 =00000000000d0007 R9 =0000000000000000 R10=ffffea0000639cc0 R11=00000000000d0008 R12=ffffea0000639cc0 R13=ffff888018e73850 R14=00000000000d0007 R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007f06e23f8900 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=00007ffd3ac14000 CR3=000000000d52c000 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=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