syzkaller login: [ 41.303895] BUG: Bad rss-counter state mm:00000000e8c8cdd6 type:MM_FILEPAGES val:33 [ 41.305579] BUG: Bad rss-counter state mm:00000000e8c8cdd6 type:MM_ANONPAGES val:22 [ 41.477370] ================================================================== [ 41.478318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.479266] Read of size 8 at addr ffff88800ca82880 by task sshd/221 [ 41.480049] [ 41.480270] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.481318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.482307] Call Trace: [ 41.482630] [ 41.482934] dump_stack_lvl+0x91/0xf0 [ 41.483434] print_report+0xcc/0x620 [ 41.483955] ? __virt_addr_valid+0x102/0x340 [ 41.484516] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.485147] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.485766] kasan_report+0xbe/0xf0 [ 41.486248] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.486875] vma_interval_tree_remove+0xc75/0xec0 [ 41.487482] vma_prepare+0xc54/0x11a0 [ 41.487973] __split_vma+0x5af/0x950 [ 41.488453] ? __pfx___split_vma+0x10/0x10 [ 41.488984] ? find_held_lock+0x2c/0x110 [ 41.489504] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.490080] ? lock_is_held_type+0x9f/0x120 [ 41.490628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.491250] ? mtree_range_walk+0x632/0x900 [ 41.491822] ? mas_walk+0x5c7/0x7c0 [ 41.492300] do_vmi_munmap+0x1f1/0x2b0 [ 41.492803] mmap_region+0x1f9/0x2660 [ 41.493294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.493817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.494541] ? __pfx_lock_acquire+0x10/0x10 [ 41.495086] ? __pfx_mmap_region+0x10/0x10 [ 41.495616] ? security_mmap_addr+0x7d/0xa0 [ 41.496162] ? get_unmapped_area+0x1f5/0x3f0 [ 41.496713] do_mmap+0x854/0xf00 [ 41.497155] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.497653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.498226] ksys_mmap_pgoff+0x3af/0x500 [ 41.498740] do_syscall_64+0x3f/0x90 [ 41.499222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.499880] RIP: 0033:0x7ff977428d82 [ 41.500341] 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 [ 41.502512] RSP: 002b:00007ffcbd95ba68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.503421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff977428d82 [ 41.504302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff976862000 [ 41.505160] RBP: 00007ff976862000 R08: 0000000000000009 R09: 0000000000001000 [ 41.506030] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f25312cec0 [ 41.506889] R13: 00007ffcbd95ba80 R14: 00007ffcbd95bab0 R15: 00007ffcbd95be10 [ 41.507755] [ 41.508054] [ 41.508272] Allocated by task 214: [ 41.508711] kasan_save_stack+0x22/0x50 [ 41.509221] kasan_set_track+0x25/0x30 [ 41.509720] __kasan_slab_alloc+0x59/0x70 [ 41.510245] kmem_cache_alloc+0x16b/0x370 [ 41.510766] vm_area_dup+0x20/0x160 [ 41.511222] __split_vma+0x170/0x950 [ 41.511690] split_vma+0xc6/0x110 [ 41.512139] mprotect_fixup+0x8d2/0xb30 [ 41.512646] do_mprotect_pkey+0x87e/0xd40 [ 41.513171] __x64_sys_mprotect+0x78/0xc0 [ 41.513695] do_syscall_64+0x3f/0x90 [ 41.514174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.514819] [ 41.515036] Freed by task 214: [ 41.515432] kasan_save_stack+0x22/0x50 [ 41.515958] kasan_set_track+0x25/0x30 [ 41.516455] kasan_save_free_info+0x2b/0x50 [ 41.516993] __kasan_slab_free+0x10a/0x190 [ 41.517540] kmem_cache_free+0x10d/0x4d0 [ 41.518052] rcu_core+0x8c8/0x2860 [ 41.518499] __do_softirq+0x1b7/0x7d4 [ 41.518982] [ 41.519203] Last potentially related work creation: [ 41.519795] kasan_save_stack+0x22/0x50 [ 41.520316] __kasan_record_aux_stack+0x8e/0xa0 [ 41.520896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.521628] remove_vma+0x139/0x170 [ 41.522084] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.522645] do_vmi_munmap+0x1f1/0x2b0 [ 41.523134] __vm_munmap+0x138/0x3a0 [ 41.523613] __x64_sys_munmap+0x59/0x80 [ 41.524136] do_syscall_64+0x3f/0x90 [ 41.524620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.525273] [ 41.525492] The buggy address belongs to the object at ffff88800ca82828 [ 41.525492] which belongs to the cache vm_area_struct of size 168 [ 41.526982] The buggy address is located 88 bytes inside of [ 41.526982] freed 168-byte region [ffff88800ca82828, ffff88800ca828d0) [ 41.528402] [ 41.528622] The buggy address belongs to the physical page: [ 41.529287] page:00000000df13bd60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca82 [ 41.530385] memcg:ffff88800e685a01 [ 41.530818] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.531469] page_type: 0xffffffff() [ 41.531930] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.532863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e685a01 [ 41.533788] page dumped because: kasan: bad access detected [ 41.534457] [ 41.534674] Memory state around the buggy address: [ 41.535265] ffff88800ca82780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.536142] ffff88800ca82800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.537008] >ffff88800ca82880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.537872] ^ [ 41.538289] ffff88800ca82900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.539152] ffff88800ca82980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.540030] ================================================================== [ 41.541072] Disabling lock debugging due to kernel taint [ 43.723891] BUG: Bad rss-counter state mm:000000004bb20945 type:MM_FILEPAGES val:33 [ 43.724881] BUG: Bad rss-counter state mm:000000004bb20945 type:MM_ANONPAGES val:22 [ 44.294728] BUG: Bad rss-counter state mm:00000000e53f28b9 type:MM_FILEPAGES val:33 [ 44.295998] BUG: Bad rss-counter state mm:00000000e53f28b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8133' (ECDSA) to the list of known hosts. 2023/06/20 04:49:26 fuzzer started 2023/06/20 04:49:26 dialing manager at localhost:44161 2023/06/20 04:49:26 checking machine... 2023/06/20 04:49:26 checking revisions... [ 44.975299] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:49:27 testing simple program... [ 45.014911] cgroup: Unknown subsys name 'net' [ 45.072193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:49:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016c3faa0 RCX=ffffffff8609fb01 RDX=0000000000000000 RSI=ffffffff8450b028 RDI=ffff888016c3faac RBP=0000000000000008 RSP=ffff888016c3f9b8 R8 =ffffffff8609fb08 R9 =ffff888016c3fa18 R10=0000000000038001 R11=000000000000792d R12=ffff888016c3faa0 R13=0000000000000000 R14=ffff888019ca0000 R15=ffff88800fdadb30 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f17f7020900 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=00007fff38e71000 CR3=00000000097a8000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00ff000000000000000000000000ff00 XMM02=2f00646f6874656d5f74707972636e65 XMM03=00003737313009524148434553415245 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000ffffffffffffffffff XMM08=00000000000000202020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007f4a93cea2a0 CR3=000000000e0ac000 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=39343a3430203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363032 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000