syzkaller login: [ 45.459983] BUG: Bad rss-counter state mm:00000000c564bc74 type:MM_FILEPAGES val:33 [ 45.461215] BUG: Bad rss-counter state mm:00000000c564bc74 type:MM_ANONPAGES val:22 [ 45.502281] ================================================================== [ 45.502989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.503720] Read of size 8 at addr ffff88801420db38 by task sshd/221 [ 45.504318] [ 45.504489] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.505342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.506097] Call Trace: [ 45.506343] [ 45.506563] dump_stack_lvl+0x91/0xf0 [ 45.506940] print_report+0xcc/0x620 [ 45.507327] ? __virt_addr_valid+0x102/0x340 [ 45.507752] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.508230] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.508705] kasan_report+0xbe/0xf0 [ 45.509079] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.509561] vma_interval_tree_remove+0xc75/0xec0 [ 45.510030] vma_prepare+0xc54/0x11a0 [ 45.510398] __split_vma+0x5af/0x950 [ 45.510764] ? __pfx___split_vma+0x10/0x10 [ 45.511174] ? find_held_lock+0x2c/0x110 [ 45.511576] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.512014] ? lock_is_held_type+0x9f/0x120 [ 45.512440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.512937] ? mtree_range_walk+0x632/0x900 [ 45.513365] ? mas_walk+0x5c7/0x7c0 [ 45.513739] do_vmi_munmap+0x1f1/0x2b0 [ 45.514099] mmap_region+0x1f9/0x2660 [ 45.514369] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.514658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.515062] ? __pfx_lock_acquire+0x10/0x10 [ 45.515357] ? __pfx_mmap_region+0x10/0x10 [ 45.515655] ? security_mmap_addr+0x7d/0xa0 [ 45.515954] ? get_unmapped_area+0x1f5/0x3f0 [ 45.516268] do_mmap+0x854/0xf00 [ 45.516512] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.516792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.517109] ksys_mmap_pgoff+0x3af/0x500 [ 45.517392] do_syscall_64+0x3f/0x90 [ 45.517661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.518026] RIP: 0033:0x7efcb0bb6d82 [ 45.518289] 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 [ 45.519492] RSP: 002b:00007ffd532a79f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.520008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcb0bb6d82 [ 45.520498] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcafff0000 [ 45.521006] RBP: 00007efcafff0000 R08: 0000000000000009 R09: 0000000000001000 [ 45.521501] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f009b40d90 [ 45.521984] R13: 00007ffd532a7a10 R14: 00007ffd532a7a40 R15: 00007ffd532a7da0 [ 45.522472] [ 45.522637] [ 45.522761] Allocated by task 214: [ 45.523011] kasan_save_stack+0x22/0x50 [ 45.523296] kasan_set_track+0x25/0x30 [ 45.523580] __kasan_slab_alloc+0x59/0x70 [ 45.523887] kmem_cache_alloc+0x16b/0x370 [ 45.524187] vm_area_dup+0x20/0x160 [ 45.524442] __split_vma+0x170/0x950 [ 45.524707] split_vma+0xc6/0x110 [ 45.524965] mprotect_fixup+0x8d2/0xb30 [ 45.525250] do_mprotect_pkey+0x87e/0xd40 [ 45.525550] __x64_sys_mprotect+0x78/0xc0 [ 45.525847] do_syscall_64+0x3f/0x90 [ 45.526122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.526484] [ 45.526610] Freed by task 214: [ 45.526832] kasan_save_stack+0x22/0x50 [ 45.527118] kasan_set_track+0x25/0x30 [ 45.527401] kasan_save_free_info+0x2b/0x50 [ 45.527701] __kasan_slab_free+0x10a/0x190 [ 45.528012] kmem_cache_free+0x10d/0x4d0 [ 45.528305] rcu_core+0x8c8/0x2860 [ 45.528562] __do_softirq+0x1b7/0x7d4 [ 45.528833] [ 45.528961] Last potentially related work creation: [ 45.529294] kasan_save_stack+0x22/0x50 [ 45.529578] __kasan_record_aux_stack+0x8e/0xa0 [ 45.529899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.530259] remove_vma+0x139/0x170 [ 45.530513] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.530829] do_vmi_munmap+0x1f1/0x2b0 [ 45.531108] __vm_munmap+0x138/0x3a0 [ 45.531369] __x64_sys_munmap+0x59/0x80 [ 45.531651] do_syscall_64+0x3f/0x90 [ 45.531921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.532294] [ 45.532413] The buggy address belongs to the object at ffff88801420dae0 [ 45.532413] which belongs to the cache vm_area_struct of size 168 [ 45.533265] The buggy address is located 88 bytes inside of [ 45.533265] freed 168-byte region [ffff88801420dae0, ffff88801420db88) [ 45.534075] [ 45.534201] The buggy address belongs to the physical page: [ 45.534581] page:00000000b2b06d85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1420d [ 45.535207] memcg:ffff88801816f001 [ 45.535451] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.535816] page_type: 0xffffffff() [ 45.536070] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.536593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801816f001 [ 45.537105] page dumped because: kasan: bad access detected [ 45.537478] [ 45.537601] Memory state around the buggy address: [ 45.537925] ffff88801420da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.538411] ffff88801420da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 45.538900] >ffff88801420db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.539380] ^ [ 45.539728] ffff88801420db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 45.540221] ffff88801420dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 45.540705] ================================================================== [ 45.541244] Disabling lock debugging due to kernel taint [ 47.464108] BUG: Bad rss-counter state mm:00000000d57769b7 type:MM_FILEPAGES val:31 [ 47.465164] BUG: Bad rss-counter state mm:00000000d57769b7 type:MM_ANONPAGES val:22 [ 48.026030] BUG: Bad rss-counter state mm:000000006153d515 type:MM_FILEPAGES val:33 [ 48.027209] BUG: Bad rss-counter state mm:000000006153d515 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6552' (ECDSA) to the list of known hosts. 2023/06/19 12:49:48 fuzzer started 2023/06/19 12:49:48 dialing manager at localhost:44161 2023/06/19 12:49:48 checking machine... 2023/06/19 12:49:48 checking revisions... [ 48.655601] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:49:48 testing simple program... [ 48.709312] cgroup: Unknown subsys name 'net' [ 48.774721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:49:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1354 RSI=ffff88801432f970 RDI=ffff88806ce09aa0 RBP=ffff88801432f970 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b00b R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88801432f970 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007fab8ec2a900 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=00007fab8e050a60 CR3=000000000f2c2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c47edbf0dfc7808000000000000ae988 XMM05=5ce251fff7073b840000000000136180 XMM06=59d5b690e0af863b0000000000135018 XMM07=fb795ef6d65770560000000000124ed0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003941db5 RBX=ffff88801ca0ed78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801ca0eda8 RBP=ffff88801a5b7f00 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801a5b92e0 R14=ffffffff813782a8 R15=ffff88801a5b92e0 RIP=ffffffff8184636c RFL=00000046 [---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 00007f5d06abb900 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=00007fff71593000 CR3=0000000016636000 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=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