syzkaller login: [ 130.850078] BUG: Bad rss-counter state mm:00000000532c5aef type:MM_FILEPAGES val:33 [ 130.851734] BUG: Bad rss-counter state mm:00000000532c5aef type:MM_ANONPAGES val:22 [ 131.033125] ================================================================== [ 131.033990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 131.034865] Read of size 8 at addr ffff88800ecfe798 by task sshd/220 [ 131.035711] [ 131.035924] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 131.036904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 131.037827] Call Trace: [ 131.038131] [ 131.038399] dump_stack_lvl+0x91/0xf0 [ 131.038863] print_report+0xcc/0x620 [ 131.039353] ? __virt_addr_valid+0x102/0x340 [ 131.039877] ? vma_interval_tree_remove+0xc75/0xec0 [ 131.040492] ? vma_interval_tree_remove+0xc75/0xec0 [ 131.041075] kasan_report+0xbe/0xf0 [ 131.041528] ? vma_interval_tree_remove+0xc75/0xec0 [ 131.042108] vma_interval_tree_remove+0xc75/0xec0 [ 131.042674] vma_prepare+0xc54/0x11a0 [ 131.043159] __split_vma+0x5af/0x950 [ 131.043609] ? __pfx___split_vma+0x10/0x10 [ 131.044118] ? find_held_lock+0x2c/0x110 [ 131.044611] do_vmi_align_munmap+0x2ba/0x11f0 [ 131.045143] ? lock_is_held_type+0x9f/0x120 [ 131.045653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 131.046222] ? mtree_range_walk+0x632/0x900 [ 131.046746] ? mas_walk+0x5c7/0x7c0 [ 131.047228] do_vmi_munmap+0x1f1/0x2b0 [ 131.047699] mmap_region+0x1f9/0x2660 [ 131.048179] ? vm_mmap_pgoff+0x15c/0x3a0 [ 131.048664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 131.049333] ? __pfx_lock_acquire+0x10/0x10 [ 131.049838] ? __pfx_mmap_region+0x10/0x10 [ 131.050335] ? security_mmap_addr+0x7d/0xa0 [ 131.050834] ? get_unmapped_area+0x1f5/0x3f0 [ 131.051381] do_mmap+0x854/0xf00 [ 131.051801] vm_mmap_pgoff+0x1a6/0x3a0 [ 131.052295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 131.052828] ksys_mmap_pgoff+0x3af/0x500 [ 131.053307] do_syscall_64+0x3f/0x90 [ 131.053761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 131.054371] RIP: 0033:0x7f65ee193d82 [ 131.054802] 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 [ 131.056836] RSP: 002b:00007ffca6ff93d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 131.057689] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65ee193d82 [ 131.058486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65ed5cd000 [ 131.059315] RBP: 00007f65ed5cd000 R08: 0000000000000009 R09: 0000000000001000 [ 131.060141] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc8ba81f70 [ 131.060942] R13: 00007ffca6ff93f0 R14: 00007ffca6ff9420 R15: 00007ffca6ff9780 [ 131.061744] [ 131.062021] [ 131.062227] Allocated by task 213: [ 131.062636] kasan_save_stack+0x22/0x50 [ 131.063147] kasan_set_track+0x25/0x30 [ 131.063613] __kasan_slab_alloc+0x59/0x70 [ 131.064118] kmem_cache_alloc+0x16b/0x370 [ 131.064605] vm_area_dup+0x20/0x160 [ 131.065037] __split_vma+0x170/0x950 [ 131.065475] split_vma+0xc6/0x110 [ 131.065892] mprotect_fixup+0x8d2/0xb30 [ 131.066367] do_mprotect_pkey+0x87e/0xd40 [ 131.066860] __x64_sys_mprotect+0x78/0xc0 [ 131.067387] do_syscall_64+0x3f/0x90 [ 131.067836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 131.068448] [ 131.068656] Freed by task 19: [ 131.069019] kasan_save_stack+0x22/0x50 [ 131.069497] kasan_set_track+0x25/0x30 [ 131.069962] kasan_save_free_info+0x2b/0x50 [ 131.070523] __kasan_slab_free+0x10a/0x190 [ 131.071165] kmem_cache_free+0x10d/0x4d0 [ 131.071647] rcu_core+0x8c8/0x2860 [ 131.072082] __do_softirq+0x1b7/0x7d4 [ 131.072535] [ 131.072741] Last potentially related work creation: [ 131.073291] kasan_save_stack+0x22/0x50 [ 131.073769] __kasan_record_aux_stack+0x8e/0xa0 [ 131.074312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 131.074922] remove_vma+0x139/0x170 [ 131.075396] do_vmi_align_munmap+0xd4a/0x11f0 [ 131.075934] do_vmi_munmap+0x1f1/0x2b0 [ 131.076410] __vm_munmap+0x138/0x3a0 [ 131.076851] __x64_sys_munmap+0x59/0x80 [ 131.077345] do_syscall_64+0x3f/0x90 [ 131.077794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 131.078407] [ 131.078615] The buggy address belongs to the object at ffff88800ecfe740 [ 131.078615] which belongs to the cache vm_area_struct of size 168 [ 131.080056] The buggy address is located 88 bytes inside of [ 131.080056] freed 168-byte region [ffff88800ecfe740, ffff88800ecfe7e8) [ 131.081397] [ 131.081607] The buggy address belongs to the physical page: [ 131.082244] page:00000000306681ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecfe [ 131.083353] memcg:ffff888019df5d01 [ 131.083765] flags: 0x100000000000200(slab|node=0|zone=1) [ 131.084422] page_type: 0xffffffff() [ 131.084866] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 131.085749] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019df5d01 [ 131.086644] page dumped because: kasan: bad access detected [ 131.087327] [ 131.087540] Memory state around the buggy address: [ 131.088136] ffff88800ecfe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 131.089063] ffff88800ecfe700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 131.090124] >ffff88800ecfe780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 131.091169] ^ [ 131.091777] ffff88800ecfe800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 131.092843] ffff88800ecfe880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 131.093914] ================================================================== [ 131.095331] Disabling lock debugging due to kernel taint [ 133.300962] BUG: Bad rss-counter state mm:000000008b007836 type:MM_FILEPAGES val:33 [ 133.302161] BUG: Bad rss-counter state mm:000000008b007836 type:MM_ANONPAGES val:22 [ 133.786443] BUG: Bad rss-counter state mm:000000004a33cc4a type:MM_FILEPAGES val:33 [ 133.787647] BUG: Bad rss-counter state mm:000000004a33cc4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15288' (ECDSA) to the list of known hosts. 2023/06/20 03:48:26 fuzzer started 2023/06/20 03:48:26 dialing manager at localhost:44161 2023/06/20 03:48:26 checking machine... 2023/06/20 03:48:26 checking revisions... [ 134.416590] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:48:26 testing simple program... [ 134.475780] cgroup: Unknown subsys name 'net' [ 134.534512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:46:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001e1c337 RSI=ffffffff8369bdb0 RDI=0000000000000005 RBP=ffff88800f0e19b8 RSP=ffff888018037888 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888009736640 R13=ffff888009736640 R14=0000000000000000 R15=0000000000000293 RIP=ffffffff814c07e0 RFL=00000006 [-----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 00007f29fa147700 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=00007f114eb53650 CR3=0000000010316000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30353234352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303532 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fbc2aa90300 CR3=0000000010316000 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=2035323a38343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a38343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000