syzkaller login: [ 38.794544] BUG: Bad rss-counter state mm:0000000089fceb12 type:MM_FILEPAGES val:33 [ 38.795318] BUG: Bad rss-counter state mm:0000000089fceb12 type:MM_ANONPAGES val:22 [ 38.932696] ================================================================== [ 38.933387] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.934089] Read of size 8 at addr ffff88801a73ac20 by task sshd/218 [ 38.934680] [ 38.934848] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.935502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.936357] Call Trace: [ 38.936598] [ 38.936813] dump_stack_lvl+0x91/0xf0 [ 38.937185] print_report+0xcc/0x620 [ 38.937550] ? __virt_addr_valid+0x102/0x340 [ 38.937963] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938465] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938938] kasan_report+0xbe/0xf0 [ 38.939296] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.939767] vma_interval_tree_remove+0xc75/0xec0 [ 38.940225] vma_prepare+0xc54/0x11a0 [ 38.940598] __split_vma+0x5af/0x950 [ 38.940954] ? __pfx___split_vma+0x10/0x10 [ 38.941353] ? find_held_lock+0x2c/0x110 [ 38.941751] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.942182] ? lock_is_held_type+0x9f/0x120 [ 38.942605] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.943064] ? mtree_range_walk+0x632/0x900 [ 38.943480] ? mas_walk+0x5c7/0x7c0 [ 38.943840] do_vmi_munmap+0x1f1/0x2b0 [ 38.944217] mmap_region+0x1f9/0x2660 [ 38.944586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.944974] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.945517] ? __pfx_lock_acquire+0x10/0x10 [ 38.945918] ? __pfx_mmap_region+0x10/0x10 [ 38.946326] ? security_mmap_addr+0x7d/0xa0 [ 38.946748] ? get_unmapped_area+0x1f5/0x3f0 [ 38.947165] do_mmap+0x854/0xf00 [ 38.947501] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.948299] ksys_mmap_pgoff+0x3af/0x500 [ 38.948688] do_syscall_64+0x3f/0x90 [ 38.949053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949549] RIP: 0033:0x7fb69e863d82 [ 38.949894] 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 [ 38.951525] RSP: 002b:00007ffeb96b2488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.952214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb69e863d82 [ 38.952863] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb69dc9d000 [ 38.953504] RBP: 00007fb69dc9d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.954148] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601badebec0 [ 38.954804] R13: 00007ffeb96b24a0 R14: 00007ffeb96b24d0 R15: 00007ffeb96b2830 [ 38.955462] [ 38.955684] [ 38.955847] Allocated by task 211: [ 38.956173] kasan_save_stack+0x22/0x50 [ 38.956562] kasan_set_track+0x25/0x30 [ 38.956938] __kasan_slab_alloc+0x59/0x70 [ 38.957336] kmem_cache_alloc+0x16b/0x370 [ 38.957726] vm_area_dup+0x20/0x160 [ 38.958069] __split_vma+0x170/0x950 [ 38.958422] split_vma+0xc6/0x110 [ 38.958771] mprotect_fixup+0x8d2/0xb30 [ 38.959151] do_mprotect_pkey+0x87e/0xd40 [ 38.959550] __x64_sys_mprotect+0x78/0xc0 [ 38.959945] do_syscall_64+0x3f/0x90 [ 38.960303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.960788] [ 38.960950] Freed by task 202: [ 38.961249] kasan_save_stack+0x22/0x50 [ 38.961632] kasan_set_track+0x25/0x30 [ 38.962007] kasan_save_free_info+0x2b/0x50 [ 38.962409] __kasan_slab_free+0x10a/0x190 [ 38.962824] kmem_cache_free+0x10d/0x4d0 [ 38.963212] rcu_core+0x8c8/0x2860 [ 38.963551] __do_softirq+0x1b7/0x7d4 [ 38.963914] [ 38.964075] Last potentially related work creation: [ 38.964512] kasan_save_stack+0x22/0x50 [ 38.964893] __kasan_record_aux_stack+0x8e/0xa0 [ 38.965326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.965813] remove_vma+0x139/0x170 [ 38.966154] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.966578] do_vmi_munmap+0x1f1/0x2b0 [ 38.966948] __vm_munmap+0x138/0x3a0 [ 38.967304] __x64_sys_munmap+0x59/0x80 [ 38.967681] do_syscall_64+0x3f/0x90 [ 38.968035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968523] [ 38.968687] The buggy address belongs to the object at ffff88801a73abc8 [ 38.968687] which belongs to the cache vm_area_struct of size 168 [ 38.969800] The buggy address is located 88 bytes inside of [ 38.969800] freed 168-byte region [ffff88801a73abc8, ffff88801a73ac70) [ 38.970868] [ 38.971034] The buggy address belongs to the physical page: [ 38.971538] page:00000000afc0648f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a73a [ 38.972357] memcg:ffff888019ff2a01 [ 38.972678] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.973169] page_type: 0xffffffff() [ 38.973515] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.974215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ff2a01 [ 38.974903] page dumped because: kasan: bad access detected [ 38.975403] [ 38.975564] Memory state around the buggy address: [ 38.976001] ffff88801a73ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.976654] ffff88801a73ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.977300] >ffff88801a73ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.977945] ^ [ 38.978343] ffff88801a73ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.978996] ffff88801a73ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.979649] ================================================================== [ 38.980379] Disabling lock debugging due to kernel taint [ 40.951389] BUG: Bad rss-counter state mm:000000006fcaff69 type:MM_FILEPAGES val:33 [ 40.952437] BUG: Bad rss-counter state mm:000000006fcaff69 type:MM_ANONPAGES val:22 [ 41.522289] BUG: Bad rss-counter state mm:00000000a145128f type:MM_FILEPAGES val:33 [ 41.523373] BUG: Bad rss-counter state mm:00000000a145128f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55491' (ECDSA) to the list of known hosts. 2023/06/19 22:14:21 fuzzer started 2023/06/19 22:14:21 dialing manager at localhost:44161 2023/06/19 22:14:21 checking machine... 2023/06/19 22:14:21 checking revisions... [ 42.269959] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:14:22 testing simple program... [ 42.306418] cgroup: Unknown subsys name 'net' [ 42.352405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:14:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffff88800e848000 RDI=ffff888015850000 RBP=ffff88800e848000 RSP=ffff888019a77eb8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888015850000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff811fbe44 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 00007f9133da6900 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=00007f913435e0b0 CR3=000000000df36000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=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=00005557acef66a0 CR3=000000000df14000 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=2031323a34313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000