syzkaller login: [ 49.626673] BUG: Bad rss-counter state mm:00000000f861a0cb type:MM_FILEPAGES val:33 [ 49.628397] BUG: Bad rss-counter state mm:00000000f861a0cb type:MM_ANONPAGES val:22 [ 49.793846] ================================================================== [ 49.795001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.796136] Read of size 8 at addr ffff88801938b6b0 by task sshd/219 [ 49.796914] [ 49.797137] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.798029] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.799050] Call Trace: [ 49.799392] [ 49.799674] dump_stack_lvl+0x91/0xf0 [ 49.800159] print_report+0xcc/0x620 [ 49.800654] ? __virt_addr_valid+0x102/0x340 [ 49.801221] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.801839] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.802524] kasan_report+0xbe/0xf0 [ 49.803002] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.803673] vma_interval_tree_remove+0xc75/0xec0 [ 49.804298] vma_prepare+0xc54/0x11a0 [ 49.804781] __split_vma+0x5af/0x950 [ 49.805270] ? __pfx___split_vma+0x10/0x10 [ 49.805804] ? find_held_lock+0x2c/0x110 [ 49.806338] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.806946] ? lock_is_held_type+0x9f/0x120 [ 49.807524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.808143] ? mtree_range_walk+0x632/0x900 [ 49.808710] ? mas_walk+0x5c7/0x7c0 [ 49.809188] do_vmi_munmap+0x1f1/0x2b0 [ 49.809716] mmap_region+0x1f9/0x2660 [ 49.810215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.810745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.811502] ? __pfx_lock_acquire+0x10/0x10 [ 49.812046] ? __pfx_mmap_region+0x10/0x10 [ 49.812601] ? security_mmap_addr+0x7d/0xa0 [ 49.813143] ? get_unmapped_area+0x1f5/0x3f0 [ 49.813705] do_mmap+0x854/0xf00 [ 49.814149] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.814689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.815288] ksys_mmap_pgoff+0x3af/0x500 [ 49.815797] do_syscall_64+0x3f/0x90 [ 49.816292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.816942] RIP: 0033:0x7f5df6418d82 [ 49.817416] 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 [ 49.819598] RSP: 002b:00007fffed67b9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.820528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5df6418d82 [ 49.821403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5df5852000 [ 49.822281] RBP: 00007f5df5852000 R08: 0000000000000009 R09: 0000000000001000 [ 49.823185] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f14cc37d90 [ 49.824080] R13: 00007fffed67ba10 R14: 00007fffed67ba40 R15: 00007fffed67bda0 [ 49.824973] [ 49.825279] [ 49.825497] Allocated by task 212: [ 49.825931] kasan_save_stack+0x22/0x50 [ 49.826472] kasan_set_track+0x25/0x30 [ 49.826977] __kasan_slab_alloc+0x59/0x70 [ 49.827534] kmem_cache_alloc+0x16b/0x370 [ 49.828100] vm_area_dup+0x20/0x160 [ 49.828689] __split_vma+0x170/0x950 [ 49.829249] split_vma+0xc6/0x110 [ 49.829697] mprotect_fixup+0x8d2/0xb30 [ 49.830228] do_mprotect_pkey+0x87e/0xd40 [ 49.830766] __x64_sys_mprotect+0x78/0xc0 [ 49.831303] do_syscall_64+0x3f/0x90 [ 49.831784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.832447] [ 49.832661] Freed by task 19: [ 49.833054] kasan_save_stack+0x22/0x50 [ 49.833567] kasan_set_track+0x25/0x30 [ 49.834079] kasan_save_free_info+0x2b/0x50 [ 49.834632] __kasan_slab_free+0x10a/0x190 [ 49.835179] kmem_cache_free+0x10d/0x4d0 [ 49.835697] rcu_core+0x8c8/0x2860 [ 49.836143] __do_softirq+0x1b7/0x7d4 [ 49.836692] [ 49.836910] Last potentially related work creation: [ 49.837499] kasan_save_stack+0x22/0x50 [ 49.838011] __kasan_record_aux_stack+0x8e/0xa0 [ 49.838599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.839240] remove_vma+0x139/0x170 [ 49.839690] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.840250] do_vmi_munmap+0x1f1/0x2b0 [ 49.840746] __vm_munmap+0x138/0x3a0 [ 49.841222] __x64_sys_munmap+0x59/0x80 [ 49.841715] do_syscall_64+0x3f/0x90 [ 49.842184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.842839] [ 49.843055] The buggy address belongs to the object at ffff88801938b658 [ 49.843055] which belongs to the cache vm_area_struct of size 168 [ 49.844538] The buggy address is located 88 bytes inside of [ 49.844538] freed 168-byte region [ffff88801938b658, ffff88801938b700) [ 49.845953] [ 49.846169] The buggy address belongs to the physical page: [ 49.846869] page:00000000c476327b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1938b [ 49.847981] memcg:ffff88800e112c01 [ 49.848410] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.849054] page_type: 0xffffffff() [ 49.849512] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.850436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e112c01 [ 49.851352] page dumped because: kasan: bad access detected [ 49.852021] [ 49.852240] Memory state around the buggy address: [ 49.852826] ffff88801938b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.853697] ffff88801938b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 49.854567] >ffff88801938b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.855419] ^ [ 49.856010] ffff88801938b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 49.856866] ffff88801938b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 49.857749] ================================================================== [ 49.858710] Disabling lock debugging due to kernel taint [ 52.456449] BUG: Bad rss-counter state mm:000000007aa2d321 type:MM_FILEPAGES val:33 [ 52.457831] BUG: Bad rss-counter state mm:000000007aa2d321 type:MM_ANONPAGES val:22 [ 52.999767] BUG: Bad rss-counter state mm:000000004613da88 type:MM_FILEPAGES val:33 [ 53.000933] BUG: Bad rss-counter state mm:000000004613da88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35007' (ECDSA) to the list of known hosts. 2023/06/19 19:31:05 fuzzer started 2023/06/19 19:31:05 dialing manager at localhost:44161 2023/06/19 19:31:05 checking machine... 2023/06/19 19:31:05 checking revisions... [ 53.675593] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:31:05 testing simple program... [ 53.722967] cgroup: Unknown subsys name 'net' [ 53.762465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:30:45 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=00007ffff2b8bb78 CR3=000000000c420000 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=2034303a31333a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a31333a3931203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007fb0ed8dd5f0 CR3=000000000cb7a000 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=2889d862afabef83984c7075d8eede2a XMM02=ec2efd57dc4c00df000000000011b758 XMM03=0598a2b76351664f000000000011b828 XMM04=bd07137957a0559500000000000ae988 XMM05=dfcdbad4f1609c370000000000132f58 XMM06=823a6581cb87b55c0000000000131658 XMM07=e042d86d42eb936e0000000000123648 XMM08=0598a2b76351664f000000000011b828 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000