syzkaller login: [ 29.986023] BUG: Bad rss-counter state mm:00000000d1c95401 type:MM_FILEPAGES val:33 [ 29.986974] BUG: Bad rss-counter state mm:00000000d1c95401 type:MM_ANONPAGES val:22 [ 30.168556] ================================================================== [ 30.169502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.170543] Read of size 8 at addr ffff888018e4d3f8 by task sshd/221 [ 30.171344] [ 30.171570] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.172501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.173512] Call Trace: [ 30.173841] [ 30.174136] dump_stack_lvl+0x91/0xf0 [ 30.174662] print_report+0xcc/0x620 [ 30.175163] ? __virt_addr_valid+0x102/0x340 [ 30.175745] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.176392] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.177031] kasan_report+0xbe/0xf0 [ 30.177530] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.178161] vma_interval_tree_remove+0xc75/0xec0 [ 30.178796] vma_prepare+0xc54/0x11a0 [ 30.179299] __split_vma+0x5af/0x950 [ 30.179822] ? __pfx___split_vma+0x10/0x10 [ 30.180380] ? find_held_lock+0x2c/0x110 [ 30.180922] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.181513] ? lock_is_held_type+0x9f/0x120 [ 30.182069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.182692] ? mtree_range_walk+0x632/0x900 [ 30.183260] ? mas_walk+0x5c7/0x7c0 [ 30.183768] do_vmi_munmap+0x1f1/0x2b0 [ 30.184271] mmap_region+0x1f9/0x2660 [ 30.184770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.185294] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.186027] ? __pfx_lock_acquire+0x10/0x10 [ 30.186574] ? __pfx_mmap_region+0x10/0x10 [ 30.187127] ? security_mmap_addr+0x7d/0xa0 [ 30.187674] ? get_unmapped_area+0x1f5/0x3f0 [ 30.188246] do_mmap+0x854/0xf00 [ 30.188695] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.189216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.189804] ksys_mmap_pgoff+0x3af/0x500 [ 30.190339] do_syscall_64+0x3f/0x90 [ 30.190847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.191531] RIP: 0033:0x7f2de93d6d82 [ 30.192016] 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 [ 30.194248] RSP: 002b:00007ffe2cfdb738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.195188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2de93d6d82 [ 30.196087] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2de8810000 [ 30.196962] RBP: 00007f2de8810000 R08: 0000000000000009 R09: 0000000000001000 [ 30.197834] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562073334ec0 [ 30.198713] R13: 00007ffe2cfdb750 R14: 00007ffe2cfdb780 R15: 00007ffe2cfdbae0 [ 30.199612] [ 30.199923] [ 30.200148] Allocated by task 214: [ 30.200591] kasan_save_stack+0x22/0x50 [ 30.201127] kasan_set_track+0x25/0x30 [ 30.201642] __kasan_slab_alloc+0x59/0x70 [ 30.202184] kmem_cache_alloc+0x16b/0x370 [ 30.202720] vm_area_dup+0x20/0x160 [ 30.203199] __split_vma+0x170/0x950 [ 30.203684] split_vma+0xc6/0x110 [ 30.204144] mprotect_fixup+0x8d2/0xb30 [ 30.204667] do_mprotect_pkey+0x87e/0xd40 [ 30.205218] __x64_sys_mprotect+0x78/0xc0 [ 30.205751] do_syscall_64+0x3f/0x90 [ 30.206238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.206904] [ 30.207124] Freed by task 214: [ 30.207537] kasan_save_stack+0x22/0x50 [ 30.208079] kasan_set_track+0x25/0x30 [ 30.208597] kasan_save_free_info+0x2b/0x50 [ 30.209143] __kasan_slab_free+0x10a/0x190 [ 30.209695] kmem_cache_free+0x10d/0x4d0 [ 30.210222] rcu_core+0x8c8/0x2860 [ 30.210683] __do_softirq+0x1b7/0x7d4 [ 30.211174] [ 30.211396] Last potentially related work creation: [ 30.211990] kasan_save_stack+0x22/0x50 [ 30.212500] __kasan_record_aux_stack+0x8e/0xa0 [ 30.213089] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.213743] remove_vma+0x139/0x170 [ 30.214198] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.214764] do_vmi_munmap+0x1f1/0x2b0 [ 30.215260] __vm_munmap+0x138/0x3a0 [ 30.215755] __x64_sys_munmap+0x59/0x80 [ 30.216259] do_syscall_64+0x3f/0x90 [ 30.216740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.217405] [ 30.217626] The buggy address belongs to the object at ffff888018e4d3a0 [ 30.217626] which belongs to the cache vm_area_struct of size 168 [ 30.219126] The buggy address is located 88 bytes inside of [ 30.219126] freed 168-byte region [ffff888018e4d3a0, ffff888018e4d448) [ 30.220570] [ 30.220789] The buggy address belongs to the physical page: [ 30.221457] page:0000000084beaab4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e4d [ 30.222574] memcg:ffff888019869201 [ 30.223009] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.223666] page_type: 0xffffffff() [ 30.224144] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.225070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019869201 [ 30.225985] page dumped because: kasan: bad access detected [ 30.226655] [ 30.226875] Memory state around the buggy address: [ 30.227455] ffff888018e4d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.228316] ffff888018e4d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.229169] >ffff888018e4d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.230017] ^ [ 30.230860] ffff888018e4d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.231719] ffff888018e4d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.232583] ================================================================== [ 30.233553] Disabling lock debugging due to kernel taint [ 32.277374] BUG: Bad rss-counter state mm:00000000507c75ec type:MM_FILEPAGES val:33 [ 32.278541] BUG: Bad rss-counter state mm:00000000507c75ec type:MM_ANONPAGES val:22 [ 32.664179] BUG: Bad rss-counter state mm:000000008e175113 type:MM_FILEPAGES val:33 [ 32.665135] BUG: Bad rss-counter state mm:000000008e175113 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26464' (ECDSA) to the list of known hosts. 2023/06/20 18:48:56 fuzzer started 2023/06/20 18:48:57 dialing manager at localhost:36067 2023/06/20 18:48:57 checking machine... 2023/06/20 18:48:57 checking revisions... [ 33.389062] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:48:57 testing simple program... [ 33.436282] cgroup: Unknown subsys name 'net' [ 33.493029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:56 Registers: info registers vcpu 0 RAX=ffffffff818475d2 RBX=ffffffff813ad470 RCX=ffffffff8613f401 RDX=1ffff11002d64f4b RSI=ffffffff818475d2 RDI=ffff888016b27ac8 RBP=ffff888016b27a98 RSP=ffff888016b279f8 R8 =ffffffff8613f412 R9 =ffff888016b27a40 R10=0000000000038001 R11=0000000000021e7d R12=ffff888016b27ac8 R13=0000000000000000 R14=ffff888016af9b40 R15=ffff888009a79260 RIP=ffffffff813ad470 RFL=00000286 [--S--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 00007f2c37537900 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=00007fffb446b000 CR3=000000000e060000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 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=00007fae567578f0 CR3=000000000ec78000 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=2036353a38343a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a38343a3831203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000