syzkaller login: [ 35.007414] BUG: Bad rss-counter state mm:00000000dfe5d7a9 type:MM_FILEPAGES val:33 [ 35.008556] BUG: Bad rss-counter state mm:00000000dfe5d7a9 type:MM_ANONPAGES val:22 [ 35.139049] ================================================================== [ 35.139999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.140973] Read of size 8 at addr ffff88800f9b3a50 by task sshd/221 [ 35.141766] [ 35.141986] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.143016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.144008] Call Trace: [ 35.144330] [ 35.144621] dump_stack_lvl+0x91/0xf0 [ 35.145154] print_report+0xcc/0x620 [ 35.145640] ? __virt_addr_valid+0x102/0x340 [ 35.146199] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.146817] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.147442] kasan_report+0xbe/0xf0 [ 35.147922] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.148549] vma_interval_tree_remove+0xc75/0xec0 [ 35.149160] vma_prepare+0xc54/0x11a0 [ 35.149654] __split_vma+0x5af/0x950 [ 35.150118] ? __pfx___split_vma+0x10/0x10 [ 35.150659] ? find_held_lock+0x2c/0x110 [ 35.151183] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.151761] ? lock_is_held_type+0x9f/0x120 [ 35.152304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.152944] ? mtree_range_walk+0x632/0x900 [ 35.153513] ? mas_walk+0x5c7/0x7c0 [ 35.153992] do_vmi_munmap+0x1f1/0x2b0 [ 35.154489] mmap_region+0x1f9/0x2660 [ 35.154982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.155505] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.156215] ? __pfx_lock_acquire+0x10/0x10 [ 35.156760] ? __pfx_mmap_region+0x10/0x10 [ 35.157309] ? security_mmap_addr+0x7d/0xa0 [ 35.157855] ? get_unmapped_area+0x1f5/0x3f0 [ 35.158422] do_mmap+0x854/0xf00 [ 35.158868] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.159373] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.159939] ksys_mmap_pgoff+0x3af/0x500 [ 35.160466] do_syscall_64+0x3f/0x90 [ 35.160960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.161615] RIP: 0033:0x7f416d9bbd82 [ 35.162083] 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 [ 35.164260] RSP: 002b:00007ffcf2621bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.165215] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f416d9bbd82 [ 35.166090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f416cdf5000 [ 35.166952] RBP: 00007f416cdf5000 R08: 0000000000000009 R09: 0000000000001000 [ 35.167815] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c41530ec0 [ 35.168680] R13: 00007ffcf2621bd0 R14: 00007ffcf2621c00 R15: 00007ffcf2621f60 [ 35.169566] [ 35.169868] [ 35.170087] Allocated by task 214: [ 35.170512] kasan_save_stack+0x22/0x50 [ 35.171020] kasan_set_track+0x25/0x30 [ 35.171531] __kasan_slab_alloc+0x59/0x70 [ 35.172056] kmem_cache_alloc+0x16b/0x370 [ 35.172581] vm_area_dup+0x20/0x160 [ 35.173056] __split_vma+0x170/0x950 [ 35.173530] split_vma+0xc6/0x110 [ 35.173975] mprotect_fixup+0x8d2/0xb30 [ 35.174473] do_mprotect_pkey+0x87e/0xd40 [ 35.174992] __x64_sys_mprotect+0x78/0xc0 [ 35.175507] do_syscall_64+0x3f/0x90 [ 35.175981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.176627] [ 35.176844] Freed by task 204: [ 35.177251] kasan_save_stack+0x22/0x50 [ 35.177771] kasan_set_track+0x25/0x30 [ 35.178273] kasan_save_free_info+0x2b/0x50 [ 35.178812] __kasan_slab_free+0x10a/0x190 [ 35.179363] kmem_cache_free+0x10d/0x4d0 [ 35.179871] rcu_core+0x8c8/0x2860 [ 35.180317] __do_softirq+0x1b7/0x7d4 [ 35.180795] [ 35.181031] Last potentially related work creation: [ 35.181632] kasan_save_stack+0x22/0x50 [ 35.182147] __kasan_record_aux_stack+0x8e/0xa0 [ 35.182740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.183398] remove_vma+0x139/0x170 [ 35.183941] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.184527] do_vmi_munmap+0x1f1/0x2b0 [ 35.185045] __vm_munmap+0x138/0x3a0 [ 35.185538] __x64_sys_munmap+0x59/0x80 [ 35.186046] do_syscall_64+0x3f/0x90 [ 35.186524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.187185] [ 35.187400] Second to last potentially related work creation: [ 35.188159] kasan_save_stack+0x22/0x50 [ 35.188689] __kasan_record_aux_stack+0x8e/0xa0 [ 35.189277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.189946] remove_vma+0x139/0x170 [ 35.190409] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.190997] do_vmi_munmap+0x1f1/0x2b0 [ 35.191499] mmap_region+0x1f9/0x2660 [ 35.192019] do_mmap+0x854/0xf00 [ 35.192463] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.193005] ksys_mmap_pgoff+0x3af/0x500 [ 35.193524] do_syscall_64+0x3f/0x90 [ 35.194020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.194692] [ 35.194915] The buggy address belongs to the object at ffff88800f9b39f8 [ 35.194915] which belongs to the cache vm_area_struct of size 168 [ 35.196437] The buggy address is located 88 bytes inside of [ 35.196437] freed 168-byte region [ffff88800f9b39f8, ffff88800f9b3aa0) [ 35.197921] [ 35.198142] The buggy address belongs to the physical page: [ 35.198835] page:0000000048fd3f0c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf9b3 [ 35.199981] memcg:ffff888015e29601 [ 35.200418] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.201164] page_type: 0xffffffff() [ 35.201632] raw: 0100000000000200 ffff88800879fc80 ffffea000059bf40 0000000000000007 [ 35.202743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e29601 [ 35.203689] page dumped because: kasan: bad access detected [ 35.204368] [ 35.204586] Memory state around the buggy address: [ 35.205232] ffff88800f9b3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.206129] ffff88800f9b3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.207029] >ffff88800f9b3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.207915] ^ [ 35.208663] ffff88800f9b3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.209572] ffff88800f9b3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.210454] ================================================================== [ 35.211405] Disabling lock debugging due to kernel taint [ 37.004652] BUG: Bad rss-counter state mm:00000000ccd40dba type:MM_FILEPAGES val:33 [ 37.005433] BUG: Bad rss-counter state mm:00000000ccd40dba type:MM_ANONPAGES val:22 [ 37.402575] BUG: Bad rss-counter state mm:000000008e994b5e type:MM_FILEPAGES val:33 [ 37.403296] BUG: Bad rss-counter state mm:000000008e994b5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24800' (ECDSA) to the list of known hosts. 2023/06/19 22:38:36 fuzzer started 2023/06/19 22:38:36 dialing manager at localhost:44161 2023/06/19 22:38:36 checking machine... 2023/06/19 22:38:36 checking revisions... [ 38.186979] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:38:37 testing simple program... [ 38.239436] cgroup: Unknown subsys name 'net' [ 38.282890] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:38:31 Registers: info registers vcpu 0 RAX=00000000087dff82 RBX=00000000ef1fee11 RCX=ffff88806ce09be8 RDX=0000000000000007 RSI=0000000000000008 RDI=000000004b3fccad RBP=ffffffff813782a8 RSP=ffff88806ce09b68 R8 =00000000d12d3bac R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff88806ce09bd0 R15=0000000000000007 RIP=ffffffff82270ebf 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 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=00007ffd62dae7a8 CR3=000000000c550000 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=2036333a38333a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a38333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a58b94 RBX=0000000000000001 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8141294c RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800d75f630 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000000 R13=ffffffff8124d5f1 R14=ffff8880169851d4 R15=0000000000000000 RIP=ffffffff8110aaad RFL=00000012 [----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 00007f7896b93900 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=00007fd70685a650 CR3=0000000009cbc000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b5b8d44c8903b08000000000000ae988 XMM05=6acea1ddb0773fb50000000000136cb8 XMM06=e4cb8bb95a7664b60000000000135b70 XMM07=fb795ef6d657705600000000001249a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000