syzkaller login: [ 31.018622] BUG: Bad rss-counter state mm:00000000e4f9ea2d type:MM_FILEPAGES val:33 [ 31.020158] BUG: Bad rss-counter state mm:00000000e4f9ea2d type:MM_ANONPAGES val:22 [ 31.183839] ================================================================== [ 31.184741] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.185703] Read of size 8 at addr ffff8880158915c8 by task sshd/221 [ 31.186480] [ 31.186784] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.187654] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.188662] Call Trace: [ 31.189002] <TASK> [ 31.189316] dump_stack_lvl+0x91/0xf0 [ 31.189805] print_report+0xcc/0x620 [ 31.190290] ? __virt_addr_valid+0x102/0x340 [ 31.190864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192121] kasan_report+0xbe/0xf0 [ 31.192607] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193225] vma_interval_tree_remove+0xc75/0xec0 [ 31.193841] vma_prepare+0xc54/0x11a0 [ 31.194333] __split_vma+0x5af/0x950 [ 31.194800] ? __pfx___split_vma+0x10/0x10 [ 31.195326] ? find_held_lock+0x2c/0x110 [ 31.195900] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.196484] ? lock_is_held_type+0x9f/0x120 [ 31.197026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.197650] ? mtree_range_walk+0x632/0x900 [ 31.198200] ? mas_walk+0x5c7/0x7c0 [ 31.198670] do_vmi_munmap+0x1f1/0x2b0 [ 31.199166] mmap_region+0x1f9/0x2660 [ 31.199646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.200185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.200900] ? __pfx_lock_acquire+0x10/0x10 [ 31.201455] ? __pfx_mmap_region+0x10/0x10 [ 31.201987] ? security_mmap_addr+0x7d/0xa0 [ 31.202531] ? get_unmapped_area+0x1f5/0x3f0 [ 31.203088] do_mmap+0x854/0xf00 [ 31.203526] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.204071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.204642] ksys_mmap_pgoff+0x3af/0x500 [ 31.205159] do_syscall_64+0x3f/0x90 [ 31.205811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206605] RIP: 0033:0x7fb20f7a6d82 [ 31.207166] 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 [ 31.209810] RSP: 002b:00007ffe8bc70538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.210907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb20f7a6d82 [ 31.211941] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb20ebe0000 [ 31.212966] RBP: 00007fb20ebe0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.214019] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b232eeec0 [ 31.215051] R13: 00007ffe8bc70550 R14: 00007ffe8bc70580 R15: 00007ffe8bc708e0 [ 31.216095] </TASK> [ 31.216453] [ 31.216716] Allocated by task 214: [ 31.217239] kasan_save_stack+0x22/0x50 [ 31.217875] kasan_set_track+0x25/0x30 [ 31.218475] __kasan_slab_alloc+0x59/0x70 [ 31.219110] kmem_cache_alloc+0x16b/0x370 [ 31.219740] vm_area_dup+0x20/0x160 [ 31.220298] __split_vma+0x170/0x950 [ 31.220868] split_vma+0xc6/0x110 [ 31.221426] mprotect_fixup+0x8d2/0xb30 [ 31.222045] do_mprotect_pkey+0x87e/0xd40 [ 31.222576] __x64_sys_mprotect+0x78/0xc0 [ 31.223097] do_syscall_64+0x3f/0x90 [ 31.223567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224204] [ 31.224417] Freed by task 19: [ 31.224805] kasan_save_stack+0x22/0x50 [ 31.225314] kasan_set_track+0x25/0x30 [ 31.225805] kasan_save_free_info+0x2b/0x50 [ 31.226329] __kasan_slab_free+0x10a/0x190 [ 31.226857] kmem_cache_free+0x10d/0x4d0 [ 31.227362] rcu_core+0x8c8/0x2860 [ 31.227811] __do_softirq+0x1b7/0x7d4 [ 31.228296] [ 31.228510] Last potentially related work creation: [ 31.229095] kasan_save_stack+0x22/0x50 [ 31.229604] __kasan_record_aux_stack+0x8e/0xa0 [ 31.230174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230809] remove_vma+0x139/0x170 [ 31.231267] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.231829] do_vmi_munmap+0x1f1/0x2b0 [ 31.232314] __vm_munmap+0x138/0x3a0 [ 31.232780] __x64_sys_munmap+0x59/0x80 [ 31.233271] do_syscall_64+0x3f/0x90 [ 31.233774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234448] [ 31.234665] The buggy address belongs to the object at ffff888015891570 [ 31.234665] which belongs to the cache vm_area_struct of size 168 [ 31.236137] The buggy address is located 88 bytes inside of [ 31.236137] freed 168-byte region [ffff888015891570, ffff888015891618) [ 31.237556] [ 31.237774] The buggy address belongs to the physical page: [ 31.238425] page:00000000c3f42fca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15891 [ 31.239513] memcg:ffff88800eba8601 [ 31.239948] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.240588] page_type: 0xffffffff() [ 31.241042] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.241979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eba8601 [ 31.242927] page dumped because: kasan: bad access detected [ 31.243603] [ 31.243828] Memory state around the buggy address: [ 31.244432] ffff888015891480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.245334] ffff888015891500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.246224] >ffff888015891580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.247114] ^ [ 31.247804] ffff888015891600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.248699] ffff888015891680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.249594] ================================================================== [ 31.250615] Disabling lock debugging due to kernel taint [ 33.152423] BUG: Bad rss-counter state mm:000000004fc0f033 type:MM_FILEPAGES val:33 [ 33.153612] BUG: Bad rss-counter state mm:000000004fc0f033 type:MM_ANONPAGES val:22 [ 33.651673] BUG: Bad rss-counter state mm:000000004562101b type:MM_FILEPAGES val:33 [ 33.652673] BUG: Bad rss-counter state mm:000000004562101b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3716' (ECDSA) to the list of known hosts. 2023/06/19 15:24:38 fuzzer started 2023/06/19 15:24:39 dialing manager at localhost:44161 2023/06/19 15:24:39 checking machine... 2023/06/19 15:24:39 checking revisions... [ 34.348497] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:24:39 testing simple program... [ 34.391240] cgroup: Unknown subsys name 'net' [ 34.451147] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:24:38 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=0000000000000001 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=00005587a8a1d290 CR3=0000000005482000 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=00007f89131fd5100000564f2a2dc790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 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=00007f42e6e70510 CR3=000000000dab6000 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=2038333a34323a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a34323a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000