syzkaller login: [ 38.780098] BUG: Bad rss-counter state mm:000000001142e85a type:MM_FILEPAGES val:33 [ 38.781346] BUG: Bad rss-counter state mm:000000001142e85a type:MM_ANONPAGES val:22 [ 38.875762] ================================================================== [ 38.876914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.878274] Read of size 8 at addr ffff88800c6d1ed8 by task sshd/218 [ 38.879149] [ 38.879410] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.880430] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.881541] Call Trace: [ 38.881904] [ 38.882226] dump_stack_lvl+0x91/0xf0 [ 38.882738] print_report+0xcc/0x620 [ 38.883229] ? __virt_addr_valid+0x102/0x340 [ 38.883870] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884586] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885294] kasan_report+0xbe/0xf0 [ 38.885802] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886459] vma_interval_tree_remove+0xc75/0xec0 [ 38.887146] vma_prepare+0xc54/0x11a0 [ 38.887724] __split_vma+0x5af/0x950 [ 38.888265] ? __pfx___split_vma+0x10/0x10 [ 38.888870] ? find_held_lock+0x2c/0x110 [ 38.889469] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.890042] ? lock_is_held_type+0x9f/0x120 [ 38.890637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.891332] ? mtree_range_walk+0x632/0x900 [ 38.891982] ? mas_walk+0x5c7/0x7c0 [ 38.892528] do_vmi_munmap+0x1f1/0x2b0 [ 38.893096] mmap_region+0x1f9/0x2660 [ 38.893641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.894160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.894971] ? __pfx_lock_acquire+0x10/0x10 [ 38.895616] ? __pfx_mmap_region+0x10/0x10 [ 38.896237] ? security_mmap_addr+0x7d/0xa0 [ 38.896863] ? get_unmapped_area+0x1f5/0x3f0 [ 38.897495] do_mmap+0x854/0xf00 [ 38.898002] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.898565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.899132] ksys_mmap_pgoff+0x3af/0x500 [ 38.899710] do_syscall_64+0x3f/0x90 [ 38.900277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901019] RIP: 0033:0x7f3bd9f5bd82 [ 38.901533] 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 [ 38.903872] RSP: 002b:00007ffec23a1a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.904930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bd9f5bd82 [ 38.905926] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bd9395000 [ 38.906848] RBP: 00007f3bd9395000 R08: 0000000000000009 R09: 0000000000001000 [ 38.907776] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e42521980 [ 38.908763] R13: 00007ffec23a1a30 R14: 00007ffec23a1a60 R15: 00007ffec23a1dc0 [ 38.909724] [ 38.910019] [ 38.910241] Allocated by task 211: [ 38.910724] kasan_save_stack+0x22/0x50 [ 38.911320] kasan_set_track+0x25/0x30 [ 38.911906] __kasan_slab_alloc+0x59/0x70 [ 38.912512] kmem_cache_alloc+0x16b/0x370 [ 38.913117] vm_area_dup+0x20/0x160 [ 38.913630] __split_vma+0x170/0x950 [ 38.914103] split_vma+0xc6/0x110 [ 38.914579] mprotect_fixup+0x8d2/0xb30 [ 38.915193] do_mprotect_pkey+0x87e/0xd40 [ 38.915810] __x64_sys_mprotect+0x78/0xc0 [ 38.916416] do_syscall_64+0x3f/0x90 [ 38.916954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917666] [ 38.917903] Freed by task 211: [ 38.918333] kasan_save_stack+0x22/0x50 [ 38.918849] kasan_set_track+0x25/0x30 [ 38.919343] kasan_save_free_info+0x2b/0x50 [ 38.919946] __kasan_slab_free+0x10a/0x190 [ 38.920534] kmem_cache_free+0x10d/0x4d0 [ 38.921096] rcu_core+0x8c8/0x2860 [ 38.921586] __do_softirq+0x1b7/0x7d4 [ 38.922067] [ 38.922283] Last potentially related work creation: [ 38.922926] kasan_save_stack+0x22/0x50 [ 38.923504] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924141] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924868] remove_vma+0x139/0x170 [ 38.925381] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.926015] do_vmi_munmap+0x1f1/0x2b0 [ 38.926569] __vm_munmap+0x138/0x3a0 [ 38.927105] __x64_sys_munmap+0x59/0x80 [ 38.927658] do_syscall_64+0x3f/0x90 [ 38.928128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928820] [ 38.929070] Second to last potentially related work creation: [ 38.929790] kasan_save_stack+0x22/0x50 [ 38.930285] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931491] remove_vma+0x139/0x170 [ 38.931939] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932493] do_vmi_munmap+0x1f1/0x2b0 [ 38.932967] mmap_region+0x1f9/0x2660 [ 38.933436] do_mmap+0x854/0xf00 [ 38.933858] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.934339] ksys_mmap_pgoff+0x3af/0x500 [ 38.934838] do_syscall_64+0x3f/0x90 [ 38.935307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935957] [ 38.936170] The buggy address belongs to the object at ffff88800c6d1e80 [ 38.936170] which belongs to the cache vm_area_struct of size 168 [ 38.937619] The buggy address is located 88 bytes inside of [ 38.937619] freed 168-byte region [ffff88800c6d1e80, ffff88800c6d1f28) [ 38.939010] [ 38.939222] The buggy address belongs to the physical page: [ 38.939886] page:000000009b3f796b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d1 [ 38.940954] memcg:ffff88800f7ca101 [ 38.941379] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.942026] page_type: 0xffffffff() [ 38.942474] raw: 0100000000000200 ffff8880087a0c80 ffffea0000594700 dead000000000006 [ 38.943414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7ca101 [ 38.944314] page dumped because: kasan: bad access detected [ 38.944970] [ 38.945182] Memory state around the buggy address: [ 38.945760] ffff88800c6d1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.946620] ffff88800c6d1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.947478] >ffff88800c6d1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.948326] ^ [ 38.949048] ffff88800c6d1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.949927] ffff88800c6d1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.950790] ================================================================== [ 38.951794] Disabling lock debugging due to kernel taint [ 40.756651] BUG: Bad rss-counter state mm:00000000327bb2b9 type:MM_FILEPAGES val:33 [ 40.757461] BUG: Bad rss-counter state mm:00000000327bb2b9 type:MM_ANONPAGES val:22 [ 41.174186] BUG: Bad rss-counter state mm:00000000ed6f6de4 type:MM_FILEPAGES val:33 [ 41.175288] BUG: Bad rss-counter state mm:00000000ed6f6de4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10402' (ECDSA) to the list of known hosts. 2023/06/21 06:38:51 fuzzer started 2023/06/21 06:38:51 dialing manager at localhost:36067 2023/06/21 06:38:51 checking machine... 2023/06/21 06:38:51 checking revisions... [ 41.922573] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:38:51 testing simple program... [ 41.982188] cgroup: Unknown subsys name 'net' [ 42.078546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:38:51 Registers: info registers vcpu 0 RAX=00007f354559b770 RBX=00007f354559b770 RCX=0000000000000000 RDX=0000000064929afa RSI=00007f354559b7c0 RDI=00007f354559b770 RBP=00007f354559b7c0 RSP=00007f354559b6d0 R8 =0000000000000015 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=0000000064929afa R13=0000000000001fa0 R14=00007f3538000ba0 R15=0000000000000003 RIP=000055c0ce7f2f11 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f354559f700 00000000 00000000 GS =0000 0000000000000000 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=00007fecde1a0900 CR3=0000000018d48000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=63736964203a31313a30343038342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303430 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861390a8 RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff861390ac R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020de5 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 00007f9cf58cf900 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=00007f9cf5e86618 CR3=0000000009514000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000