syzkaller login: [ 30.570143] BUG: Bad rss-counter state mm:00000000f5ddc31a type:MM_FILEPAGES val:33 [ 30.571171] BUG: Bad rss-counter state mm:00000000f5ddc31a type:MM_ANONPAGES val:22 [ 30.738881] ================================================================== [ 30.740238] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.741717] Read of size 8 at addr ffff888019dd7140 by task sshd/219 [ 30.742804] [ 30.743070] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.744112] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.745331] Call Trace: [ 30.745731] [ 30.746081] dump_stack_lvl+0x91/0xf0 [ 30.746680] print_report+0xcc/0x620 [ 30.747265] ? __virt_addr_valid+0x102/0x340 [ 30.747938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748669] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749416] kasan_report+0xbe/0xf0 [ 30.750000] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750754] vma_interval_tree_remove+0xc75/0xec0 [ 30.751477] vma_prepare+0xc54/0x11a0 [ 30.752058] __split_vma+0x5af/0x950 [ 30.752634] ? __pfx___split_vma+0x10/0x10 [ 30.753270] ? find_held_lock+0x2c/0x110 [ 30.753927] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754617] ? lock_is_held_type+0x9f/0x120 [ 30.755268] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.756011] ? mtree_range_walk+0x632/0x900 [ 30.756680] ? mas_walk+0x5c7/0x7c0 [ 30.757246] do_vmi_munmap+0x1f1/0x2b0 [ 30.757848] mmap_region+0x1f9/0x2660 [ 30.758442] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.759067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.759934] ? __pfx_lock_acquire+0x10/0x10 [ 30.760581] ? __pfx_mmap_region+0x10/0x10 [ 30.761217] ? security_mmap_addr+0x7d/0xa0 [ 30.761860] ? get_unmapped_area+0x1f5/0x3f0 [ 30.762560] do_mmap+0x854/0xf00 [ 30.763099] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.763701] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.764385] ksys_mmap_pgoff+0x3af/0x500 [ 30.764891] do_syscall_64+0x3f/0x90 [ 30.765400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.766054] RIP: 0033:0x7fd05aca6d82 [ 30.766487] 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 [ 30.768469] RSP: 002b:00007fff6ed5b0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.769319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd05aca6d82 [ 30.770124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd05a0e0000 [ 30.770917] RBP: 00007fd05a0e0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.771713] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564842eb4ec0 [ 30.772508] R13: 00007fff6ed5b0d0 R14: 00007fff6ed5b100 R15: 00007fff6ed5b460 [ 30.773316] [ 30.773595] [ 30.773801] Allocated by task 212: [ 30.774223] kasan_save_stack+0x22/0x50 [ 30.774713] kasan_set_track+0x25/0x30 [ 30.775214] __kasan_slab_alloc+0x59/0x70 [ 30.775740] kmem_cache_alloc+0x16b/0x370 [ 30.776259] vm_area_dup+0x20/0x160 [ 30.776711] __split_vma+0x170/0x950 [ 30.777180] split_vma+0xc6/0x110 [ 30.777617] mprotect_fixup+0x8d2/0xb30 [ 30.778129] do_mprotect_pkey+0x87e/0xd40 [ 30.778647] __x64_sys_mprotect+0x78/0xc0 [ 30.779164] do_syscall_64+0x3f/0x90 [ 30.779647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780292] [ 30.780502] Freed by task 212: [ 30.780899] kasan_save_stack+0x22/0x50 [ 30.781393] kasan_set_track+0x25/0x30 [ 30.781888] kasan_save_free_info+0x2b/0x50 [ 30.782448] __kasan_slab_free+0x10a/0x190 [ 30.783027] kmem_cache_free+0x10d/0x4d0 [ 30.783540] rcu_core+0x8c8/0x2860 [ 30.783985] __do_softirq+0x1b7/0x7d4 [ 30.784454] [ 30.784669] Last potentially related work creation: [ 30.785253] kasan_save_stack+0x22/0x50 [ 30.785746] __kasan_record_aux_stack+0x8e/0xa0 [ 30.786353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.787033] remove_vma+0x139/0x170 [ 30.787502] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.788095] do_vmi_munmap+0x1f1/0x2b0 [ 30.788596] __vm_munmap+0x138/0x3a0 [ 30.789087] __x64_sys_munmap+0x59/0x80 [ 30.789622] do_syscall_64+0x3f/0x90 [ 30.790132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790808] [ 30.791030] The buggy address belongs to the object at ffff888019dd70e8 [ 30.791030] which belongs to the cache vm_area_struct of size 168 [ 30.792563] The buggy address is located 88 bytes inside of [ 30.792563] freed 168-byte region [ffff888019dd70e8, ffff888019dd7190) [ 30.794041] [ 30.794262] The buggy address belongs to the physical page: [ 30.794928] page:0000000079d97d50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dd7 [ 30.796039] memcg:ffff88800e04cb01 [ 30.796467] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.797133] page_type: 0xffffffff() [ 30.797591] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.798532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e04cb01 [ 30.799456] page dumped because: kasan: bad access detected [ 30.800127] [ 30.800341] Memory state around the buggy address: [ 30.800930] ffff888019dd7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.801784] ffff888019dd7080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.802672] >ffff888019dd7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.803524] ^ [ 30.804157] ffff888019dd7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.805007] ffff888019dd7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.805922] ================================================================== [ 30.806898] Disabling lock debugging due to kernel taint [ 33.167175] BUG: Bad rss-counter state mm:00000000f3f8ce1e type:MM_FILEPAGES val:33 [ 33.168156] BUG: Bad rss-counter state mm:00000000f3f8ce1e type:MM_ANONPAGES val:22 [ 33.644539] BUG: Bad rss-counter state mm:0000000029fb6e54 type:MM_FILEPAGES val:33 [ 33.645594] BUG: Bad rss-counter state mm:0000000029fb6e54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15991' (ECDSA) to the list of known hosts. 2023/06/20 15:23:17 fuzzer started 2023/06/20 15:23:17 dialing manager at localhost:36067 2023/06/20 15:23:17 checking machine... 2023/06/20 15:23:17 checking revisions... [ 34.363295] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:23:17 testing simple program... [ 34.411615] cgroup: Unknown subsys name 'net' [ 34.466340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:23:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f410168b920 CR3=000000000ed16000 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=2036313a33323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33323a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b38 RCX=0000000000000001 RDX=1ffff1100d9e1368 RSI=ffffffff8180803b RDI=ffff88806cf09b40 RBP=0000000000000010 RSP=ffff88806cf09a50 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020de5 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800ffb1b40 R15=ffff8880097cb398 RIP=ffffffff813ad4cf RFL=00000283 [--S---C] 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 00007f2915d46900 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=00007f2915d25020 CR3=000000000c76c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000