syzkaller login: [ 31.355497] BUG: Bad rss-counter state mm:00000000b6b42ef3 type:MM_FILEPAGES val:33 [ 31.356697] BUG: Bad rss-counter state mm:00000000b6b42ef3 type:MM_ANONPAGES val:22 [ 31.402225] ================================================================== [ 31.403385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.404559] Read of size 8 at addr ffff888009788ed8 by task sshd/220 [ 31.405551] [ 31.405806] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.406813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.407937] Call Trace: [ 31.408302] [ 31.408632] dump_stack_lvl+0x91/0xf0 [ 31.409206] print_report+0xcc/0x620 [ 31.409769] ? __virt_addr_valid+0x102/0x340 [ 31.410408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.411147] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.411868] kasan_report+0xbe/0xf0 [ 31.412434] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.413169] vma_interval_tree_remove+0xc75/0xec0 [ 31.413876] vma_prepare+0xc54/0x11a0 [ 31.414433] __split_vma+0x5af/0x950 [ 31.415002] ? __pfx___split_vma+0x10/0x10 [ 31.415612] ? find_held_lock+0x2c/0x110 [ 31.416225] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.416880] ? lock_is_held_type+0x9f/0x120 [ 31.417509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.418205] ? mtree_range_walk+0x632/0x900 [ 31.418848] ? mas_walk+0x5c7/0x7c0 [ 31.419393] do_vmi_munmap+0x1f1/0x2b0 [ 31.419973] mmap_region+0x1f9/0x2660 [ 31.420545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.421159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.422004] ? __pfx_lock_acquire+0x10/0x10 [ 31.422634] ? __pfx_mmap_region+0x10/0x10 [ 31.423285] ? security_mmap_addr+0x7d/0xa0 [ 31.423920] ? get_unmapped_area+0x1f5/0x3f0 [ 31.424584] do_mmap+0x854/0xf00 [ 31.425105] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.425704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.426376] ksys_mmap_pgoff+0x3af/0x500 [ 31.426986] do_syscall_64+0x3f/0x90 [ 31.427558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428332] RIP: 0033:0x7f68cfd8cd82 [ 31.428880] 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 [ 31.431437] RSP: 002b:00007fff026f8488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.432502] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68cfd8cd82 [ 31.433500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68cf1c6000 [ 31.434494] RBP: 00007f68cf1c6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.435495] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dec0b57ec0 [ 31.436495] R13: 00007fff026f84a0 R14: 00007fff026f84d0 R15: 00007fff026f8830 [ 31.437505] [ 31.437850] [ 31.438102] Allocated by task 213: [ 31.438601] kasan_save_stack+0x22/0x50 [ 31.439206] kasan_set_track+0x25/0x30 [ 31.439778] __kasan_slab_alloc+0x59/0x70 [ 31.440390] kmem_cache_alloc+0x16b/0x370 [ 31.440995] vm_area_dup+0x20/0x160 [ 31.441532] __split_vma+0x170/0x950 [ 31.442076] split_vma+0xc6/0x110 [ 31.442589] mprotect_fixup+0x8d2/0xb30 [ 31.443192] do_mprotect_pkey+0x87e/0xd40 [ 31.443810] __x64_sys_mprotect+0x78/0xc0 [ 31.444429] do_syscall_64+0x3f/0x90 [ 31.444981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.445735] [ 31.445985] Freed by task 213: [ 31.446436] kasan_save_stack+0x22/0x50 [ 31.447028] kasan_set_track+0x25/0x30 [ 31.447598] kasan_save_free_info+0x2b/0x50 [ 31.448212] __kasan_slab_free+0x10a/0x190 [ 31.448836] kmem_cache_free+0x10d/0x4d0 [ 31.449433] rcu_core+0x8c8/0x2860 [ 31.449945] __do_softirq+0x1b7/0x7d4 [ 31.450497] [ 31.450747] Last potentially related work creation: [ 31.451431] kasan_save_stack+0x22/0x50 [ 31.452020] __kasan_record_aux_stack+0x8e/0xa0 [ 31.452691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.453438] remove_vma+0x139/0x170 [ 31.453970] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.454619] do_vmi_munmap+0x1f1/0x2b0 [ 31.455195] __vm_munmap+0x138/0x3a0 [ 31.455745] __x64_sys_munmap+0x59/0x80 [ 31.456320] do_syscall_64+0x3f/0x90 [ 31.456866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.457611] [ 31.457862] The buggy address belongs to the object at ffff888009788e80 [ 31.457862] which belongs to the cache vm_area_struct of size 168 [ 31.459589] The buggy address is located 88 bytes inside of [ 31.459589] freed 168-byte region [ffff888009788e80, ffff888009788f28) [ 31.461208] [ 31.461460] The buggy address belongs to the physical page: [ 31.462223] page:000000007ba67253 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9788 [ 31.463495] memcg:ffff88800dc09e01 [ 31.463982] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.464735] page_type: 0xffffffff() [ 31.465255] raw: 0100000000000200 ffff88800879fc80 ffffea00003bea80 dead000000000002 [ 31.466312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc09e01 [ 31.467367] page dumped because: kasan: bad access detected [ 31.468122] [ 31.468374] Memory state around the buggy address: [ 31.469033] ffff888009788d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.470014] ffff888009788e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.471023] >ffff888009788e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.471995] ^ [ 31.472834] ffff888009788f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.473814] ffff888009788f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.474791] ================================================================== [ 31.476112] Disabling lock debugging due to kernel taint [ 33.747068] BUG: Bad rss-counter state mm:000000008c51a114 type:MM_FILEPAGES val:33 [ 33.748272] BUG: Bad rss-counter state mm:000000008c51a114 type:MM_ANONPAGES val:22 [ 34.262252] BUG: Bad rss-counter state mm:000000001e3012dd type:MM_FILEPAGES val:33 [ 34.263398] BUG: Bad rss-counter state mm:000000001e3012dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58287' (ECDSA) to the list of known hosts. 2023/06/20 07:34:15 fuzzer started 2023/06/20 07:34:15 dialing manager at localhost:44161 2023/06/20 07:34:15 checking machine... 2023/06/20 07:34:15 checking revisions... [ 34.951713] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:34:15 testing simple program... [ 34.991669] cgroup: Unknown subsys name 'net' [ 35.042999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:34:14 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=ffffffff8542a6c0 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800e138410 RIP=ffffffff813744ea 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 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=00007ffc1ffa3fc8 CR3=0000000016ce8000 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=2034313a34333a3730203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303033393520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88801a077b50 RSP=ffff88801a077a80 R8 =0000000000000001 R9 =ffffed100340ef5c R10=ffff88801a077ae7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007fc79657d700 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=00007f4d8bb82a80 CR3=0000000016ce8000 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=34333a3730203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034313a3433 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303033 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000