syzkaller login: [ 32.506484] BUG: Bad rss-counter state mm:00000000c705513b type:MM_FILEPAGES val:33 [ 32.507283] BUG: Bad rss-counter state mm:00000000c705513b type:MM_ANONPAGES val:22 [ 32.645404] ================================================================== [ 32.646060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.646637] Read of size 8 at addr ffff88800ed6e228 by task sshd/220 [ 32.647096] [ 32.647228] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.647764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.648378] Call Trace: [ 32.648582] [ 32.648768] dump_stack_lvl+0x91/0xf0 [ 32.649083] print_report+0xcc/0x620 [ 32.649396] ? __virt_addr_valid+0x102/0x340 [ 32.649747] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.650381] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.650759] kasan_report+0xbe/0xf0 [ 32.651055] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.651426] vma_interval_tree_remove+0xc75/0xec0 [ 32.651785] vma_prepare+0xc54/0x11a0 [ 32.652067] __split_vma+0x5af/0x950 [ 32.652372] ? __pfx___split_vma+0x10/0x10 [ 32.652695] ? find_held_lock+0x2c/0x110 [ 32.653035] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.653391] ? lock_is_held_type+0x9f/0x120 [ 32.653736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.654173] ? mtree_range_walk+0x632/0x900 [ 32.654515] ? mas_walk+0x5c7/0x7c0 [ 32.654811] do_vmi_munmap+0x1f1/0x2b0 [ 32.655110] mmap_region+0x1f9/0x2660 [ 32.655415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.655737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.656172] ? __pfx_lock_acquire+0x10/0x10 [ 32.656495] ? __pfx_mmap_region+0x10/0x10 [ 32.656823] ? security_mmap_addr+0x7d/0xa0 [ 32.657143] ? get_unmapped_area+0x1f5/0x3f0 [ 32.657481] do_mmap+0x854/0xf00 [ 32.657753] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.658096] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.658438] ksys_mmap_pgoff+0x3af/0x500 [ 32.658751] do_syscall_64+0x3f/0x90 [ 32.659046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.659441] RIP: 0033:0x7fb503e44d82 [ 32.659722] 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 [ 32.660997] RSP: 002b:00007ffea0223b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.661554] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb503e44d82 [ 32.662126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb50327e000 [ 32.662656] RBP: 00007fb50327e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.663189] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d18a193d90 [ 32.663696] R13: 00007ffea0223b70 R14: 00007ffea0223ba0 R15: 00007ffea0223f00 [ 32.664248] [ 32.664439] [ 32.664575] Allocated by task 213: [ 32.664890] kasan_save_stack+0x22/0x50 [ 32.665208] kasan_set_track+0x25/0x30 [ 32.665509] __kasan_slab_alloc+0x59/0x70 [ 32.665831] kmem_cache_alloc+0x16b/0x370 [ 32.666175] vm_area_dup+0x20/0x160 [ 32.666452] __split_vma+0x170/0x950 [ 32.666739] split_vma+0xc6/0x110 [ 32.667007] mprotect_fixup+0x8d2/0xb30 [ 32.667311] do_mprotect_pkey+0x87e/0xd40 [ 32.667624] __x64_sys_mprotect+0x78/0xc0 [ 32.667943] do_syscall_64+0x3f/0x90 [ 32.668225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.668604] [ 32.668733] Freed by task 213: [ 32.668974] kasan_save_stack+0x22/0x50 [ 32.669283] kasan_set_track+0x25/0x30 [ 32.669593] kasan_save_free_info+0x2b/0x50 [ 32.669951] __kasan_slab_free+0x10a/0x190 [ 32.670297] kmem_cache_free+0x10d/0x4d0 [ 32.670633] rcu_core+0x8c8/0x2860 [ 32.670943] __do_softirq+0x1b7/0x7d4 [ 32.671248] [ 32.671384] Last potentially related work creation: [ 32.671763] kasan_save_stack+0x22/0x50 [ 32.672104] __kasan_record_aux_stack+0x8e/0xa0 [ 32.672493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.672908] remove_vma+0x139/0x170 [ 32.673198] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.673552] do_vmi_munmap+0x1f1/0x2b0 [ 32.673873] __vm_munmap+0x138/0x3a0 [ 32.674223] __x64_sys_munmap+0x59/0x80 [ 32.674553] do_syscall_64+0x3f/0x90 [ 32.674861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.675285] [ 32.675425] Second to last potentially related work creation: [ 32.675879] kasan_save_stack+0x22/0x50 [ 32.676204] __kasan_record_aux_stack+0x8e/0xa0 [ 32.676580] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.677002] remove_vma+0x139/0x170 [ 32.677295] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.677670] do_vmi_munmap+0x1f1/0x2b0 [ 32.678022] mmap_region+0x1f9/0x2660 [ 32.678330] do_mmap+0x854/0xf00 [ 32.678607] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.678931] ksys_mmap_pgoff+0x3af/0x500 [ 32.679257] do_syscall_64+0x3f/0x90 [ 32.679578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.679998] [ 32.680139] The buggy address belongs to the object at ffff88800ed6e1d0 [ 32.680139] which belongs to the cache vm_area_struct of size 168 [ 32.681090] The buggy address is located 88 bytes inside of [ 32.681090] freed 168-byte region [ffff88800ed6e1d0, ffff88800ed6e278) [ 32.682054] [ 32.682195] The buggy address belongs to the physical page: [ 32.682621] page:00000000b9363cc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed6e [ 32.683337] memcg:ffff88800e65a001 [ 32.683609] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.684067] page_type: 0xffffffff() [ 32.684364] raw: 0100000000000200 ffff88800879fc80 ffffea00003b8680 dead000000000007 [ 32.684952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e65a001 [ 32.685543] page dumped because: kasan: bad access detected [ 32.686014] [ 32.686154] Memory state around the buggy address: [ 32.686527] ffff88800ed6e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.687090] ffff88800ed6e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.687656] >ffff88800ed6e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.688227] ^ [ 32.688593] ffff88800ed6e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.689166] ffff88800ed6e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.689713] ================================================================== [ 32.690470] Disabling lock debugging due to kernel taint [ 34.652998] BUG: Bad rss-counter state mm:0000000021b62894 type:MM_FILEPAGES val:33 [ 34.653730] BUG: Bad rss-counter state mm:0000000021b62894 type:MM_ANONPAGES val:22 [ 34.990925] BUG: Bad rss-counter state mm:000000009c17346d type:MM_FILEPAGES val:33 [ 34.991574] BUG: Bad rss-counter state mm:000000009c17346d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36500' (ECDSA) to the list of known hosts. 2023/06/20 09:47:42 fuzzer started 2023/06/20 09:47:42 dialing manager at localhost:44161 2023/06/20 09:47:42 checking machine... 2023/06/20 09:47:42 checking revisions... [ 35.581114] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:47:42 testing simple program... [ 35.628401] cgroup: Unknown subsys name 'net' [ 35.667123] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:47:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019ac8c98 RCX=0000000000000000 RDX=ffff888015e60000 RSI=ffffffff8198b8dc RDI=0000000000000005 RBP=ffff888016748178 RSP=ffff88800ed9fa88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800d8fe900 R14=0000000000000020 R15=0000000000008000 RIP=ffffffff814c07e0 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 00007f36c5b3a900 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=00007f36c60ef650 CR3=000000001bf76000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffd5409bce8 CR3=0000000017e46000 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=2032343a37343a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a37343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000