syzkaller login: [ 31.461921] BUG: Bad rss-counter state mm:000000009e97c6ab type:MM_FILEPAGES val:33 [ 31.462799] BUG: Bad rss-counter state mm:000000009e97c6ab type:MM_ANONPAGES val:22 [ 31.590676] ================================================================== [ 31.591377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.592104] Read of size 8 at addr ffff88801439d968 by task sshd/219 [ 31.592652] [ 31.592809] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.593406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.594109] Call Trace: [ 31.594340] [ 31.594542] dump_stack_lvl+0x91/0xf0 [ 31.594878] print_report+0xcc/0x620 [ 31.595409] ? __virt_addr_valid+0x102/0x340 [ 31.595809] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.596281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.596716] kasan_report+0xbe/0xf0 [ 31.597056] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.597494] vma_interval_tree_remove+0xc75/0xec0 [ 31.597927] vma_prepare+0xc54/0x11a0 [ 31.598256] __split_vma+0x5af/0x950 [ 31.598563] ? __pfx___split_vma+0x10/0x10 [ 31.598933] ? find_held_lock+0x2c/0x110 [ 31.599307] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.599711] ? lock_is_held_type+0x9f/0x120 [ 31.600135] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.600485] ? mtree_range_walk+0x632/0x900 [ 31.600801] ? mas_walk+0x5c7/0x7c0 [ 31.601073] do_vmi_munmap+0x1f1/0x2b0 [ 31.601354] mmap_region+0x1f9/0x2660 [ 31.601622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.601913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.602334] ? __pfx_lock_acquire+0x10/0x10 [ 31.602644] ? __pfx_mmap_region+0x10/0x10 [ 31.602941] ? security_mmap_addr+0x7d/0xa0 [ 31.603238] ? get_unmapped_area+0x1f5/0x3f0 [ 31.603546] do_mmap+0x854/0xf00 [ 31.603791] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.604082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.604401] ksys_mmap_pgoff+0x3af/0x500 [ 31.604684] do_syscall_64+0x3f/0x90 [ 31.604960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.605338] RIP: 0033:0x7f320bb81d82 [ 31.605602] 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 [ 31.606843] RSP: 002b:00007ffe162cc5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.607374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f320bb81d82 [ 31.607869] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f320afbb000 [ 31.608384] RBP: 00007f320afbb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.608865] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a57e2a0d90 [ 31.609345] R13: 00007ffe162cc5e0 R14: 00007ffe162cc610 R15: 00007ffe162cc970 [ 31.609820] [ 31.609982] [ 31.610098] Allocated by task 212: [ 31.610342] kasan_save_stack+0x22/0x50 [ 31.610677] kasan_set_track+0x25/0x30 [ 31.610992] __kasan_slab_alloc+0x59/0x70 [ 31.611343] kmem_cache_alloc+0x16b/0x370 [ 31.611683] vm_area_dup+0x20/0x160 [ 31.612042] __split_vma+0x170/0x950 [ 31.612356] split_vma+0xc6/0x110 [ 31.612639] mprotect_fixup+0x8d2/0xb30 [ 31.612986] do_mprotect_pkey+0x87e/0xd40 [ 31.613343] __x64_sys_mprotect+0x78/0xc0 [ 31.613686] do_syscall_64+0x3f/0x90 [ 31.614018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614468] [ 31.614613] Freed by task 212: [ 31.614898] kasan_save_stack+0x22/0x50 [ 31.615262] kasan_set_track+0x25/0x30 [ 31.615610] kasan_save_free_info+0x2b/0x50 [ 31.616021] __kasan_slab_free+0x10a/0x190 [ 31.616394] kmem_cache_free+0x10d/0x4d0 [ 31.616766] rcu_core+0x8c8/0x2860 [ 31.617100] __do_softirq+0x1b7/0x7d4 [ 31.617460] [ 31.617616] Last potentially related work creation: [ 31.618038] kasan_save_stack+0x22/0x50 [ 31.618412] __kasan_record_aux_stack+0x8e/0xa0 [ 31.618836] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.619312] remove_vma+0x139/0x170 [ 31.619653] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.620176] do_vmi_munmap+0x1f1/0x2b0 [ 31.620550] __vm_munmap+0x138/0x3a0 [ 31.620886] __x64_sys_munmap+0x59/0x80 [ 31.621255] do_syscall_64+0x3f/0x90 [ 31.621607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.622073] [ 31.622231] The buggy address belongs to the object at ffff88801439d910 [ 31.622231] which belongs to the cache vm_area_struct of size 168 [ 31.623321] The buggy address is located 88 bytes inside of [ 31.623321] freed 168-byte region [ffff88801439d910, ffff88801439d9b8) [ 31.624394] [ 31.624557] The buggy address belongs to the physical page: [ 31.625040] page:00000000f58651f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1439d [ 31.625863] memcg:ffff888016dcb401 [ 31.626173] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.626641] page_type: 0xffffffff() [ 31.626976] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.627672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dcb401 [ 31.628332] page dumped because: kasan: bad access detected [ 31.628808] [ 31.628970] Memory state around the buggy address: [ 31.629384] ffff88801439d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.629983] ffff88801439d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.630575] >ffff88801439d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.631201] ^ [ 31.631777] ffff88801439d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.632395] ffff88801439da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.633009] ================================================================== [ 31.633793] Disabling lock debugging due to kernel taint [ 33.085784] BUG: Bad rss-counter state mm:00000000d3ff7506 type:MM_FILEPAGES val:33 [ 33.086629] BUG: Bad rss-counter state mm:00000000d3ff7506 type:MM_ANONPAGES val:22 [ 33.459439] BUG: Bad rss-counter state mm:00000000d19fbadd type:MM_FILEPAGES val:33 [ 33.460242] BUG: Bad rss-counter state mm:00000000d19fbadd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11548' (ECDSA) to the list of known hosts. 2023/06/21 09:18:49 fuzzer started 2023/06/21 09:18:49 dialing manager at localhost:36067 2023/06/21 09:18:49 checking machine... 2023/06/21 09:18:49 checking revisions... [ 34.050633] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:18:49 testing simple program... [ 34.083827] cgroup: Unknown subsys name 'net' [ 34.123294] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed1002d39f2e RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3d350 RBP=ffff88800844f780 RSP=ffff8880169cf968 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000092c40 R13=0000000000092c40 R14=0000000000000000 R15=0000000000092c40 RIP=ffffffff810bd090 RFL=00000292 [--S-A--] 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 00007f6d50d2d900 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=00007ffd699e4000 CR3=000000000e636000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fe46eaf2230 CR3=0000000015b74000 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=2039343a38313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a38313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000