syzkaller login: [ 36.239025] BUG: Bad rss-counter state mm:000000001c11480b type:MM_FILEPAGES val:33 [ 36.240849] BUG: Bad rss-counter state mm:000000001c11480b type:MM_ANONPAGES val:22 [ 36.386186] ================================================================== [ 36.387524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.389044] Read of size 8 at addr ffff88800d512798 by task sshd/220 [ 36.390021] [ 36.390300] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.391370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.392565] Call Trace: [ 36.392960] [ 36.393306] dump_stack_lvl+0x91/0xf0 [ 36.393907] print_report+0xcc/0x620 [ 36.394514] ? __virt_addr_valid+0x102/0x340 [ 36.395189] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.395952] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.396704] kasan_report+0xbe/0xf0 [ 36.397286] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.398045] vma_interval_tree_remove+0xc75/0xec0 [ 36.398825] vma_prepare+0xc54/0x11a0 [ 36.399412] __split_vma+0x5af/0x950 [ 36.399989] ? __pfx___split_vma+0x10/0x10 [ 36.400617] ? find_held_lock+0x2c/0x110 [ 36.401256] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.401941] ? lock_is_held_type+0x9f/0x120 [ 36.402605] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.403341] ? mtree_range_walk+0x632/0x900 [ 36.404006] ? mas_walk+0x5c7/0x7c0 [ 36.404581] do_vmi_munmap+0x1f1/0x2b0 [ 36.405177] mmap_region+0x1f9/0x2660 [ 36.405768] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.406407] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.407271] ? __pfx_lock_acquire+0x10/0x10 [ 36.407921] ? __pfx_mmap_region+0x10/0x10 [ 36.408568] ? security_mmap_addr+0x7d/0xa0 [ 36.409210] ? get_unmapped_area+0x1f5/0x3f0 [ 36.409885] do_mmap+0x854/0xf00 [ 36.410449] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.411052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.411730] ksys_mmap_pgoff+0x3af/0x500 [ 36.412356] do_syscall_64+0x3f/0x90 [ 36.412934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.413713] RIP: 0033:0x7fdd910b7d82 [ 36.414284] 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 [ 36.416886] RSP: 002b:00007ffe50b42668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.418004] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd910b7d82 [ 36.418882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd904f1000 [ 36.419693] RBP: 00007fdd904f1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.420501] R10: 0000000000000812 R11: 0000000000000206 R12: 000056499104eec0 [ 36.421312] R13: 00007ffe50b42680 R14: 00007ffe50b426b0 R15: 00007ffe50b42a10 [ 36.422122] [ 36.422421] [ 36.422629] Allocated by task 213: [ 36.423034] kasan_save_stack+0x22/0x50 [ 36.423512] kasan_set_track+0x25/0x30 [ 36.423980] __kasan_slab_alloc+0x59/0x70 [ 36.424477] kmem_cache_alloc+0x16b/0x370 [ 36.424974] vm_area_dup+0x20/0x160 [ 36.425403] __split_vma+0x170/0x950 [ 36.425842] split_vma+0xc6/0x110 [ 36.426267] mprotect_fixup+0x8d2/0xb30 [ 36.426750] do_mprotect_pkey+0x87e/0xd40 [ 36.427242] __x64_sys_mprotect+0x78/0xc0 [ 36.427821] do_syscall_64+0x3f/0x90 [ 36.428365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.429104] [ 36.429349] Freed by task 13: [ 36.429789] kasan_save_stack+0x22/0x50 [ 36.430378] kasan_set_track+0x25/0x30 [ 36.431029] kasan_save_free_info+0x2b/0x50 [ 36.431649] __kasan_slab_free+0x10a/0x190 [ 36.432263] kmem_cache_free+0x10d/0x4d0 [ 36.432849] rcu_core+0x8c8/0x2860 [ 36.433364] __do_softirq+0x1b7/0x7d4 [ 36.433913] [ 36.434157] Last potentially related work creation: [ 36.434857] kasan_save_stack+0x22/0x50 [ 36.435439] __kasan_record_aux_stack+0x8e/0xa0 [ 36.436106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.436849] remove_vma+0x139/0x170 [ 36.437376] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.438019] do_vmi_munmap+0x1f1/0x2b0 [ 36.438595] __vm_munmap+0x138/0x3a0 [ 36.439139] __x64_sys_munmap+0x59/0x80 [ 36.439720] do_syscall_64+0x3f/0x90 [ 36.440266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.441010] [ 36.441263] The buggy address belongs to the object at ffff88800d512740 [ 36.441263] which belongs to the cache vm_area_struct of size 168 [ 36.442992] The buggy address is located 88 bytes inside of [ 36.442992] freed 168-byte region [ffff88800d512740, ffff88800d5127e8) [ 36.444616] [ 36.444865] The buggy address belongs to the physical page: [ 36.445633] page:0000000099612df2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd512 [ 36.446923] memcg:ffff888015fe6901 [ 36.447418] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.448164] page_type: 0xffffffff() [ 36.448686] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.449749] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fe6901 [ 36.450815] page dumped because: kasan: bad access detected [ 36.451583] [ 36.451831] Memory state around the buggy address: [ 36.452506] ffff88800d512680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.453492] ffff88800d512700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.454504] >ffff88800d512780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.455489] ^ [ 36.456061] ffff88800d512800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.457049] ffff88800d512880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.458153] ================================================================== [ 36.459420] Disabling lock debugging due to kernel taint [ 38.512772] BUG: Bad rss-counter state mm:000000002cd82382 type:MM_FILEPAGES val:33 [ 38.513941] BUG: Bad rss-counter state mm:000000002cd82382 type:MM_ANONPAGES val:22 [ 38.928601] BUG: Bad rss-counter state mm:00000000a26a2eee type:MM_FILEPAGES val:33 [ 38.929581] BUG: Bad rss-counter state mm:00000000a26a2eee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28557' (ECDSA) to the list of known hosts. 2023/06/19 21:39:01 fuzzer started 2023/06/19 21:39:02 dialing manager at localhost:44161 2023/06/19 21:39:02 checking machine... 2023/06/19 21:39:02 checking revisions... [ 39.566905] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:39:02 testing simple program... [ 39.608771] cgroup: Unknown subsys name 'net' [ 39.653345] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:38:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f1aba9cfed0 CR3=0000000010350000 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=2031303a39333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880167051c0 RCX=ffff8880169ef6d0 RDX=ffff8880169ef6b0 RSI=ffff8880167051c0 RDI=ffff8880169ef660 RBP=ffff8880169ef6d0 RSP=ffff8880169ef638 R8 =0000000000000130 R9 =0000000000000000 R10=ffff8880169ef6b0 R11=00000000000b6996 R12=ffff8880169ef6b0 R13=ffff8880169ef6d8 R14=ffff8880169ef6f8 R15=ffff8880169ef6b0 RIP=ffffffff84508080 RFL=00000286 [--S--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 00007fe527a8e900 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=00007fe527a38008 CR3=000000001ca4c000 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