syzkaller login: [ 36.233922] BUG: Bad rss-counter state mm:00000000b28b8b51 type:MM_FILEPAGES val:32 [ 36.234957] BUG: Bad rss-counter state mm:00000000b28b8b51 type:MM_ANONPAGES val:22 [ 36.419857] ================================================================== [ 36.421020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.422153] Read of size 8 at addr ffff88800cae73f8 by task sshd/220 [ 36.422947] [ 36.423173] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.424057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.425082] Call Trace: [ 36.425402] [ 36.425699] dump_stack_lvl+0x91/0xf0 [ 36.426219] print_report+0xcc/0x620 [ 36.426723] ? __virt_addr_valid+0x102/0x340 [ 36.427296] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.427944] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.428561] kasan_report+0xbe/0xf0 [ 36.429077] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.429696] vma_interval_tree_remove+0xc75/0xec0 [ 36.430341] vma_prepare+0xc54/0x11a0 [ 36.430841] __split_vma+0x5af/0x950 [ 36.431345] ? __pfx___split_vma+0x10/0x10 [ 36.431892] ? find_held_lock+0x2c/0x110 [ 36.432413] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.433026] ? lock_is_held_type+0x9f/0x120 [ 36.433571] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.434214] ? mtree_range_walk+0x632/0x900 [ 36.434766] ? mas_walk+0x5c7/0x7c0 [ 36.435261] do_vmi_munmap+0x1f1/0x2b0 [ 36.435763] mmap_region+0x1f9/0x2660 [ 36.436264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.436789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.437514] ? __pfx_lock_acquire+0x10/0x10 [ 36.438091] ? __pfx_mmap_region+0x10/0x10 [ 36.438628] ? security_mmap_addr+0x7d/0xa0 [ 36.439177] ? get_unmapped_area+0x1f5/0x3f0 [ 36.439735] do_mmap+0x854/0xf00 [ 36.440196] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.440704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.441282] ksys_mmap_pgoff+0x3af/0x500 [ 36.441799] do_syscall_64+0x3f/0x90 [ 36.442315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.442986] RIP: 0033:0x7f87ff9e4d82 [ 36.443447] 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 [ 36.445626] RSP: 002b:00007ffd281624b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.446569] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87ff9e4d82 [ 36.447443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87fee1e000 [ 36.448322] RBP: 00007f87fee1e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.449208] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d5383bec0 [ 36.450091] R13: 00007ffd281624d0 R14: 00007ffd28162500 R15: 00007ffd28162860 [ 36.450975] [ 36.451270] [ 36.451486] Allocated by task 213: [ 36.451933] kasan_save_stack+0x22/0x50 [ 36.452440] kasan_set_track+0x25/0x30 [ 36.452977] __kasan_slab_alloc+0x59/0x70 [ 36.453507] kmem_cache_alloc+0x16b/0x370 [ 36.454054] vm_area_dup+0x20/0x160 [ 36.454518] __split_vma+0x170/0x950 [ 36.454998] split_vma+0xc6/0x110 [ 36.455443] mprotect_fixup+0x8d2/0xb30 [ 36.455974] do_mprotect_pkey+0x87e/0xd40 [ 36.456504] __x64_sys_mprotect+0x78/0xc0 [ 36.457066] do_syscall_64+0x3f/0x90 [ 36.457545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.458216] [ 36.458436] Freed by task 213: [ 36.458840] kasan_save_stack+0x22/0x50 [ 36.459377] kasan_set_track+0x25/0x30 [ 36.459888] kasan_save_free_info+0x2b/0x50 [ 36.460426] __kasan_slab_free+0x10a/0x190 [ 36.461001] kmem_cache_free+0x10d/0x4d0 [ 36.461522] rcu_core+0x8c8/0x2860 [ 36.462000] __do_softirq+0x1b7/0x7d4 [ 36.462488] [ 36.462705] Last potentially related work creation: [ 36.463386] kasan_save_stack+0x22/0x50 [ 36.463909] __kasan_record_aux_stack+0x8e/0xa0 [ 36.464490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.465183] remove_vma+0x139/0x170 [ 36.465644] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.466232] do_vmi_munmap+0x1f1/0x2b0 [ 36.466725] __vm_munmap+0x138/0x3a0 [ 36.467214] __x64_sys_munmap+0x59/0x80 [ 36.467722] do_syscall_64+0x3f/0x90 [ 36.468218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.468879] [ 36.469102] The buggy address belongs to the object at ffff88800cae73a0 [ 36.469102] which belongs to the cache vm_area_struct of size 168 [ 36.470599] The buggy address is located 88 bytes inside of [ 36.470599] freed 168-byte region [ffff88800cae73a0, ffff88800cae7448) [ 36.472059] [ 36.472280] The buggy address belongs to the physical page: [ 36.472985] page:00000000f3a013ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcae7 [ 36.474106] memcg:ffff88801681d101 [ 36.474542] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.475220] page_type: 0xffffffff() [ 36.475676] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.476634] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801681d101 [ 36.477566] page dumped because: kasan: bad access detected [ 36.478251] [ 36.478470] Memory state around the buggy address: [ 36.479088] ffff88800cae7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.480224] ffff88800cae7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.481316] >ffff88800cae7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.482207] ^ [ 36.483077] ffff88800cae7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.483950] ffff88800cae7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.484813] ================================================================== [ 36.485759] Disabling lock debugging due to kernel taint [ 38.616479] BUG: Bad rss-counter state mm:000000002e024f2a type:MM_FILEPAGES val:33 [ 38.617450] BUG: Bad rss-counter state mm:000000002e024f2a type:MM_ANONPAGES val:22 [ 38.996275] BUG: Bad rss-counter state mm:00000000ada50227 type:MM_FILEPAGES val:33 [ 38.997281] BUG: Bad rss-counter state mm:00000000ada50227 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5584' (ECDSA) to the list of known hosts. 2023/06/20 02:14:41 fuzzer started 2023/06/20 02:14:41 dialing manager at localhost:44161 2023/06/20 02:14:41 checking machine... 2023/06/20 02:14:41 checking revisions... [ 39.744015] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:14:41 testing simple program... [ 39.789079] cgroup: Unknown subsys name 'net' [ 39.828603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:14:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff810ac57d RDX=ffff888017ea8000 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888017ea8000 RSP=ffff888010167ed0 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888017ea9680 R14=0000564f7f31e14c R15=0000000000000000 RIP=ffffffff814c01fc RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3f56a46900 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=0000564f7f31e14c CR3=000000000c790000 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=6720646572637465733a4d41503d706f 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 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=00007f6546093510 CR3=000000000e044000 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=2030343a34313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a34313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000