syzkaller login: [ 32.464468] BUG: Bad rss-counter state mm:00000000317eea30 type:MM_FILEPAGES val:33 [ 32.466027] BUG: Bad rss-counter state mm:00000000317eea30 type:MM_ANONPAGES val:22 [ 32.610839] ================================================================== [ 32.611757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.612696] Read of size 8 at addr ffff88800c65d6b0 by task sshd/221 [ 32.613576] [ 32.613799] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.614668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.615674] Call Trace: [ 32.615992] [ 32.616283] dump_stack_lvl+0x91/0xf0 [ 32.616775] print_report+0xcc/0x620 [ 32.617275] ? __virt_addr_valid+0x102/0x340 [ 32.617833] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.618451] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.619076] kasan_report+0xbe/0xf0 [ 32.619557] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.620174] vma_interval_tree_remove+0xc75/0xec0 [ 32.620780] vma_prepare+0xc54/0x11a0 [ 32.621280] __split_vma+0x5af/0x950 [ 32.621758] ? __pfx___split_vma+0x10/0x10 [ 32.622293] ? find_held_lock+0x2c/0x110 [ 32.622819] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.623390] ? lock_is_held_type+0x9f/0x120 [ 32.623931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.624542] ? mtree_range_walk+0x632/0x900 [ 32.625117] ? mas_walk+0x5c7/0x7c0 [ 32.625589] do_vmi_munmap+0x1f1/0x2b0 [ 32.626081] mmap_region+0x1f9/0x2660 [ 32.626566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.627085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.627814] ? __pfx_lock_acquire+0x10/0x10 [ 32.628353] ? __pfx_mmap_region+0x10/0x10 [ 32.628892] ? security_mmap_addr+0x7d/0xa0 [ 32.629438] ? get_unmapped_area+0x1f5/0x3f0 [ 32.629994] do_mmap+0x854/0xf00 [ 32.630435] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.630941] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.631510] ksys_mmap_pgoff+0x3af/0x500 [ 32.632030] do_syscall_64+0x3f/0x90 [ 32.632512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.633168] RIP: 0033:0x7f1607183d82 [ 32.633630] 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 [ 32.635807] RSP: 002b:00007ffc7fcef8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.636725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1607183d82 [ 32.637601] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16065bd000 [ 32.638445] RBP: 00007f16065bd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.639288] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dc9c62ec0 [ 32.640128] R13: 00007ffc7fcef900 R14: 00007ffc7fcef930 R15: 00007ffc7fcefc90 [ 32.640987] [ 32.641284] [ 32.641502] Allocated by task 214: [ 32.641932] kasan_save_stack+0x22/0x50 [ 32.642440] kasan_set_track+0x25/0x30 [ 32.642939] __kasan_slab_alloc+0x59/0x70 [ 32.643467] kmem_cache_alloc+0x16b/0x370 [ 32.643985] vm_area_dup+0x20/0x160 [ 32.644444] __split_vma+0x170/0x950 [ 32.644918] split_vma+0xc6/0x110 [ 32.645364] mprotect_fixup+0x8d2/0xb30 [ 32.645867] do_mprotect_pkey+0x87e/0xd40 [ 32.646399] __x64_sys_mprotect+0x78/0xc0 [ 32.646927] do_syscall_64+0x3f/0x90 [ 32.647410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.648052] [ 32.648272] Freed by task 214: [ 32.648668] kasan_save_stack+0x22/0x50 [ 32.649197] kasan_set_track+0x25/0x30 [ 32.649688] kasan_save_free_info+0x2b/0x50 [ 32.650219] __kasan_slab_free+0x10a/0x190 [ 32.650749] kmem_cache_free+0x10d/0x4d0 [ 32.651259] rcu_core+0x8c8/0x2860 [ 32.651705] __do_softirq+0x1b7/0x7d4 [ 32.652179] [ 32.652396] Last potentially related work creation: [ 32.652992] kasan_save_stack+0x22/0x50 [ 32.653501] __kasan_record_aux_stack+0x8e/0xa0 [ 32.654079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.654720] remove_vma+0x139/0x170 [ 32.655173] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.655732] do_vmi_munmap+0x1f1/0x2b0 [ 32.656213] __vm_munmap+0x138/0x3a0 [ 32.656684] __x64_sys_munmap+0x59/0x80 [ 32.657197] do_syscall_64+0x3f/0x90 [ 32.657669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.658306] [ 32.658528] The buggy address belongs to the object at ffff88800c65d658 [ 32.658528] which belongs to the cache vm_area_struct of size 168 [ 32.659990] The buggy address is located 88 bytes inside of [ 32.659990] freed 168-byte region [ffff88800c65d658, ffff88800c65d700) [ 32.661444] [ 32.661664] The buggy address belongs to the physical page: [ 32.662332] page:00000000823015a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc65d [ 32.663436] memcg:ffff88800f0ceb01 [ 32.663867] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.664529] page_type: 0xffffffff() [ 32.664988] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.665913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0ceb01 [ 32.666828] page dumped because: kasan: bad access detected [ 32.667498] [ 32.667715] Memory state around the buggy address: [ 32.668296] ffff88800c65d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.669182] ffff88800c65d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.670048] >ffff88800c65d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.670913] ^ [ 32.671502] ffff88800c65d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.672371] ffff88800c65d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.673239] ================================================================== [ 32.674718] Disabling lock debugging due to kernel taint [ 34.490276] BUG: Bad rss-counter state mm:00000000b937eeb6 type:MM_FILEPAGES val:33 [ 34.491650] BUG: Bad rss-counter state mm:00000000b937eeb6 type:MM_ANONPAGES val:22 [ 34.891771] BUG: Bad rss-counter state mm:0000000044b53b77 type:MM_FILEPAGES val:33 [ 34.892570] BUG: Bad rss-counter state mm:0000000044b53b77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50793' (ECDSA) to the list of known hosts. 2023/06/19 18:40:23 fuzzer started 2023/06/19 18:40:23 dialing manager at localhost:44161 2023/06/19 18:40:23 checking machine... 2023/06/19 18:40:23 checking revisions... [ 35.644193] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:40:23 testing simple program... [ 35.687043] cgroup: Unknown subsys name 'net' [ 35.758619] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:40:21 Registers: info registers vcpu 0 RAX=1ffff11001be6083 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800da88000 RSI=ffffffff817167c0 RDI=ffff88800df30418 RBP=00007fff438e709c RSP=ffff88801a887de8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800df303a0 R13=0000000000000000 R14=0000000000000040 R15=ffff8880169740c0 RIP=ffffffff817167db 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f040ad26900 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=00007fff438e709c CR3=0000000017f4c000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f7d0c56c700 CR3=000000000dd4e000 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=2032323a30343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a30343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000