syzkaller login: [ 33.385594] BUG: Bad rss-counter state mm:00000000c2f0e59a type:MM_FILEPAGES val:33 [ 33.386369] BUG: Bad rss-counter state mm:00000000c2f0e59a type:MM_ANONPAGES val:22 [ 33.581541] ================================================================== [ 33.582240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.582901] Read of size 8 at addr ffff88800fdd7880 by task sshd/223 [ 33.583457] [ 33.583614] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.584268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.586010] Call Trace: [ 33.586506] [ 33.587143] dump_stack_lvl+0x91/0xf0 [ 33.588224] print_report+0xcc/0x620 [ 33.589298] ? __virt_addr_valid+0x102/0x340 [ 33.590570] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.592012] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.593397] kasan_report+0xbe/0xf0 [ 33.594432] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.595836] vma_interval_tree_remove+0xc75/0xec0 [ 33.597139] vma_prepare+0xc54/0x11a0 [ 33.598153] __split_vma+0x5af/0x950 [ 33.599195] ? __pfx___split_vma+0x10/0x10 [ 33.600367] ? find_held_lock+0x2c/0x110 [ 33.601482] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.602649] ? lock_is_held_type+0x9f/0x120 [ 33.603834] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.605562] ? mtree_range_walk+0x632/0x900 [ 33.606695] ? mas_walk+0x5c7/0x7c0 [ 33.607692] do_vmi_munmap+0x1f1/0x2b0 [ 33.608758] mmap_region+0x1f9/0x2660 [ 33.609799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.610372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.611000] ? __pfx_lock_acquire+0x10/0x10 [ 33.611429] ? __pfx_mmap_region+0x10/0x10 [ 33.611841] ? security_mmap_addr+0x7d/0xa0 [ 33.612267] ? get_unmapped_area+0x1f5/0x3f0 [ 33.612680] do_mmap+0x854/0xf00 [ 33.613073] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.613426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.613837] ksys_mmap_pgoff+0x3af/0x500 [ 33.614277] do_syscall_64+0x3f/0x90 [ 33.615139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.616556] RIP: 0033:0x7feaa5c0dd82 [ 33.617640] 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 [ 33.622780] RSP: 002b:00007ffd40ddc5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.624892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feaa5c0dd82 [ 33.627055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feaa5047000 [ 33.629043] RBP: 00007feaa5047000 R08: 0000000000000009 R09: 0000000000001000 [ 33.630803] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a80c858ec0 [ 33.632550] R13: 00007ffd40ddc5e0 R14: 00007ffd40ddc610 R15: 00007ffd40ddc970 [ 33.634432] [ 33.635124] [ 33.635576] Allocated by task 214: [ 33.636543] kasan_save_stack+0x22/0x50 [ 33.637792] kasan_set_track+0x25/0x30 [ 33.639043] __kasan_slab_alloc+0x59/0x70 [ 33.640283] kmem_cache_alloc+0x16b/0x370 [ 33.640697] vm_area_dup+0x20/0x160 [ 33.641078] __split_vma+0x170/0x950 [ 33.641448] split_vma+0xc6/0x110 [ 33.642410] mprotect_fixup+0x8d2/0xb30 [ 33.643478] do_mprotect_pkey+0x87e/0xd40 [ 33.644661] __x64_sys_mprotect+0x78/0xc0 [ 33.645882] do_syscall_64+0x3f/0x90 [ 33.646964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.648275] [ 33.648713] Freed by task 214: [ 33.649549] kasan_save_stack+0x22/0x50 [ 33.650678] kasan_set_track+0x25/0x30 [ 33.651678] kasan_save_free_info+0x2b/0x50 [ 33.652856] __kasan_slab_free+0x10a/0x190 [ 33.654080] kmem_cache_free+0x10d/0x4d0 [ 33.655224] rcu_core+0x8c8/0x2860 [ 33.656100] __do_softirq+0x1b7/0x7d4 [ 33.656452] [ 33.656622] Last potentially related work creation: [ 33.657138] kasan_save_stack+0x22/0x50 [ 33.657485] __kasan_record_aux_stack+0x8e/0xa0 [ 33.657871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.658358] remove_vma+0x139/0x170 [ 33.658676] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.659107] do_vmi_munmap+0x1f1/0x2b0 [ 33.659491] __vm_munmap+0x138/0x3a0 [ 33.659818] __x64_sys_munmap+0x59/0x80 [ 33.660270] do_syscall_64+0x3f/0x90 [ 33.660603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.661124] [ 33.661273] The buggy address belongs to the object at ffff88800fdd7828 [ 33.661273] which belongs to the cache vm_area_struct of size 168 [ 33.662363] The buggy address is located 88 bytes inside of [ 33.662363] freed 168-byte region [ffff88800fdd7828, ffff88800fdd78d0) [ 33.663468] [ 33.663633] The buggy address belongs to the physical page: [ 33.664162] page:0000000007078476 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdd7 [ 33.665185] memcg:ffff88800fdd8001 [ 33.665514] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.666094] page_type: 0xffffffff() [ 33.666447] raw: 0100000000000200 ffff88800879fc80 ffffea0000634c80 000000000000000b [ 33.667182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdd8001 [ 33.667861] page dumped because: kasan: bad access detected [ 33.668400] [ 33.668574] Memory state around the buggy address: [ 33.669126] ffff88800fdd7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.669770] ffff88800fdd7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.670551] >ffff88800fdd7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.671245] ^ [ 33.671552] ffff88800fdd7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.672223] ffff88800fdd7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 33.672848] ================================================================== [ 33.673724] Disabling lock debugging due to kernel taint [ 35.785363] BUG: Bad rss-counter state mm:00000000851600b5 type:MM_FILEPAGES val:33 [ 35.786153] BUG: Bad rss-counter state mm:00000000851600b5 type:MM_ANONPAGES val:22 [ 36.292940] BUG: Bad rss-counter state mm:0000000090cccc89 type:MM_FILEPAGES val:33 [ 36.293824] BUG: Bad rss-counter state mm:0000000090cccc89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3639' (ECDSA) to the list of known hosts. 2023/06/20 10:35:05 fuzzer started 2023/06/20 10:35:05 dialing manager at localhost:44161 2023/06/20 10:35:05 checking machine... 2023/06/20 10:35:05 checking revisions... [ 36.943028] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:35:05 testing simple program... [ 36.978181] cgroup: Unknown subsys name 'net' [ 37.013482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:35:02 Registers: info registers vcpu 0 RAX=ffffffff8118d7d9 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff3a RSI=ffffffff8118d7d9 RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88800f0ecc60 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 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=00007fff4d77620c CR3=000000001a536000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c616e696d5d657414062e212e302e00 XMM07=672065736f6c635f6e6f69737365733a 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=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 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=00007ffe90f8cc08 CR3=000000000f832000 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=35333a3031203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3233325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000