syzkaller login: [ 32.121239] BUG: Bad rss-counter state mm:000000002909dfd2 type:MM_FILEPAGES val:33 [ 32.122510] BUG: Bad rss-counter state mm:000000002909dfd2 type:MM_ANONPAGES val:22 [ 32.162588] ================================================================== [ 32.163853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.165264] Read of size 8 at addr ffff88801a3bfc20 by task sshd/219 [ 32.166344] [ 32.166648] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.167623] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.168686] Call Trace: [ 32.169055] [ 32.169353] dump_stack_lvl+0x91/0xf0 [ 32.169917] print_report+0xcc/0x620 [ 32.170390] ? __virt_addr_valid+0x102/0x340 [ 32.171097] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.171704] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.172308] kasan_report+0xbe/0xf0 [ 32.172774] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.173511] vma_interval_tree_remove+0xc75/0xec0 [ 32.174170] vma_prepare+0xc54/0x11a0 [ 32.174763] __split_vma+0x5af/0x950 [ 32.175344] ? __pfx___split_vma+0x10/0x10 [ 32.175862] ? find_held_lock+0x2c/0x110 [ 32.176461] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.177052] ? lock_is_held_type+0x9f/0x120 [ 32.177679] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.178410] ? mtree_range_walk+0x632/0x900 [ 32.178933] ? mas_walk+0x5c7/0x7c0 [ 32.179410] do_vmi_munmap+0x1f1/0x2b0 [ 32.179886] mmap_region+0x1f9/0x2660 [ 32.180409] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.180919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.181635] ? __pfx_lock_acquire+0x10/0x10 [ 32.182194] ? __pfx_mmap_region+0x10/0x10 [ 32.182747] ? security_mmap_addr+0x7d/0xa0 [ 32.183292] ? get_unmapped_area+0x1f5/0x3f0 [ 32.183841] do_mmap+0x854/0xf00 [ 32.184289] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.184783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.185360] ksys_mmap_pgoff+0x3af/0x500 [ 32.186056] do_syscall_64+0x3f/0x90 [ 32.186631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.187395] RIP: 0033:0x7fcf09b89d82 [ 32.187930] 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 [ 32.190487] RSP: 002b:00007ffcea58fe28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.191579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf09b89d82 [ 32.192605] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf08fc3000 [ 32.193645] RBP: 00007fcf08fc3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.194681] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563572657f70 [ 32.195699] R13: 00007ffcea58fe40 R14: 00007ffcea58fe70 R15: 00007ffcea5901d0 [ 32.196739] [ 32.197089] [ 32.197348] Allocated by task 212: [ 32.197880] kasan_save_stack+0x22/0x50 [ 32.198498] kasan_set_track+0x25/0x30 [ 32.199094] __kasan_slab_alloc+0x59/0x70 [ 32.199732] kmem_cache_alloc+0x16b/0x370 [ 32.200357] vm_area_dup+0x20/0x160 [ 32.200910] __split_vma+0x170/0x950 [ 32.201478] split_vma+0xc6/0x110 [ 32.202040] mprotect_fixup+0x8d2/0xb30 [ 32.202623] do_mprotect_pkey+0x87e/0xd40 [ 32.203137] __x64_sys_mprotect+0x78/0xc0 [ 32.203649] do_syscall_64+0x3f/0x90 [ 32.204118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.204750] [ 32.204963] Freed by task 212: [ 32.205357] kasan_save_stack+0x22/0x50 [ 32.205866] kasan_set_track+0x25/0x30 [ 32.206437] kasan_save_free_info+0x2b/0x50 [ 32.206971] __kasan_slab_free+0x10a/0x190 [ 32.207504] kmem_cache_free+0x10d/0x4d0 [ 32.208008] rcu_core+0x8c8/0x2860 [ 32.208452] __do_softirq+0x1b7/0x7d4 [ 32.208922] [ 32.209134] Last potentially related work creation: [ 32.209739] kasan_save_stack+0x22/0x50 [ 32.210238] __kasan_record_aux_stack+0x8e/0xa0 [ 32.210801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.211437] remove_vma+0x139/0x170 [ 32.211882] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.212443] do_vmi_munmap+0x1f1/0x2b0 [ 32.212923] __vm_munmap+0x138/0x3a0 [ 32.213391] __x64_sys_munmap+0x59/0x80 [ 32.213897] do_syscall_64+0x3f/0x90 [ 32.214371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.215011] [ 32.215222] The buggy address belongs to the object at ffff88801a3bfbc8 [ 32.215222] which belongs to the cache vm_area_struct of size 168 [ 32.216659] The buggy address is located 88 bytes inside of [ 32.216659] freed 168-byte region [ffff88801a3bfbc8, ffff88801a3bfc70) [ 32.218058] [ 32.218271] The buggy address belongs to the physical page: [ 32.218931] page:00000000f0f39c73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3bf [ 32.220009] memcg:ffff88800da9fb01 [ 32.220433] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.221070] page_type: 0xffffffff() [ 32.221514] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.222448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da9fb01 [ 32.223339] page dumped because: kasan: bad access detected [ 32.223988] [ 32.224203] Memory state around the buggy address: [ 32.224773] ffff88801a3bfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.225631] ffff88801a3bfb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.226473] >ffff88801a3bfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.227320] ^ [ 32.227854] ffff88801a3bfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.228700] ffff88801a3bfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.229555] ================================================================== [ 32.230458] Disabling lock debugging due to kernel taint [ 34.351831] BUG: Bad rss-counter state mm:000000008a1e4962 type:MM_FILEPAGES val:33 [ 34.352895] BUG: Bad rss-counter state mm:000000008a1e4962 type:MM_ANONPAGES val:22 [ 34.816831] BUG: Bad rss-counter state mm:00000000c24d26e1 type:MM_FILEPAGES val:33 [ 34.817839] BUG: Bad rss-counter state mm:00000000c24d26e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19154' (ECDSA) to the list of known hosts. 2023/06/19 22:04:46 fuzzer started 2023/06/19 22:04:47 dialing manager at localhost:44161 2023/06/19 22:04:47 checking machine... 2023/06/19 22:04:47 checking revisions... [ 35.500663] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:04:47 testing simple program... [ 35.551072] cgroup: Unknown subsys name 'net' [ 35.624545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff888019fb8000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801824f218 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88801ca94130 RIP=ffffffff814c0388 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5e611bc900 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=00007ffed6885000 CR3=0000000018170000 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=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=00007fb714086000 CR3=000000000eeb0000 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=2036343a34303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a34303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000