syzkaller login: [ 30.612173] BUG: Bad rss-counter state mm:00000000f2a597ac type:MM_FILEPAGES val:33 [ 30.613577] BUG: Bad rss-counter state mm:00000000f2a597ac type:MM_ANONPAGES val:22 [ 30.650336] ================================================================== [ 30.651346] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.652277] Read of size 8 at addr ffff888016a68b38 by task sshd/220 [ 30.653083] [ 30.653299] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.654163] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.655136] Call Trace: [ 30.655481] [ 30.655777] dump_stack_lvl+0x91/0xf0 [ 30.656282] print_report+0xcc/0x620 [ 30.656788] ? __virt_addr_valid+0x102/0x340 [ 30.657369] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.657995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.658622] kasan_report+0xbe/0xf0 [ 30.659103] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.659732] vma_interval_tree_remove+0xc75/0xec0 [ 30.660336] vma_prepare+0xc54/0x11a0 [ 30.660824] __split_vma+0x5af/0x950 [ 30.661302] ? __pfx___split_vma+0x10/0x10 [ 30.661835] ? find_held_lock+0x2c/0x110 [ 30.662365] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.662934] ? lock_is_held_type+0x9f/0x120 [ 30.663493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.664106] ? mtree_range_walk+0x632/0x900 [ 30.664662] ? mas_walk+0x5c7/0x7c0 [ 30.665148] do_vmi_munmap+0x1f1/0x2b0 [ 30.665651] mmap_region+0x1f9/0x2660 [ 30.666136] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.666690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.667431] ? __pfx_lock_acquire+0x10/0x10 [ 30.667984] ? __pfx_mmap_region+0x10/0x10 [ 30.668526] ? security_mmap_addr+0x7d/0xa0 [ 30.669078] ? get_unmapped_area+0x1f5/0x3f0 [ 30.669636] do_mmap+0x854/0xf00 [ 30.670085] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.670591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.671145] ksys_mmap_pgoff+0x3af/0x500 [ 30.671657] do_syscall_64+0x3f/0x90 [ 30.672143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.672795] RIP: 0033:0x7f3cb80fbd82 [ 30.673280] 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 [ 30.675397] RSP: 002b:00007fff9b9c9ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.676291] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cb80fbd82 [ 30.677140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cb7535000 [ 30.677975] RBP: 00007f3cb7535000 R08: 0000000000000009 R09: 0000000000001000 [ 30.678970] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8f7e3cec0 [ 30.679811] R13: 00007fff9b9c9ef0 R14: 00007fff9b9c9f20 R15: 00007fff9b9ca280 [ 30.680677] [ 30.680965] [ 30.681197] Allocated by task 213: [ 30.681633] kasan_save_stack+0x22/0x50 [ 30.682132] kasan_set_track+0x25/0x30 [ 30.682626] __kasan_slab_alloc+0x59/0x70 [ 30.683162] kmem_cache_alloc+0x16b/0x370 [ 30.683684] vm_area_dup+0x20/0x160 [ 30.684132] __split_vma+0x170/0x950 [ 30.684592] split_vma+0xc6/0x110 [ 30.685041] mprotect_fixup+0x8d2/0xb30 [ 30.685552] do_mprotect_pkey+0x87e/0xd40 [ 30.686081] __x64_sys_mprotect+0x78/0xc0 [ 30.686610] do_syscall_64+0x3f/0x90 [ 30.687086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687739] [ 30.687957] Freed by task 19: [ 30.688341] kasan_save_stack+0x22/0x50 [ 30.688843] kasan_set_track+0x25/0x30 [ 30.689342] kasan_save_free_info+0x2b/0x50 [ 30.689869] __kasan_slab_free+0x10a/0x190 [ 30.690404] kmem_cache_free+0x10d/0x4d0 [ 30.690922] rcu_core+0x8c8/0x2860 [ 30.691365] __do_softirq+0x1b7/0x7d4 [ 30.691863] [ 30.692079] Last potentially related work creation: [ 30.692667] kasan_save_stack+0x22/0x50 [ 30.693182] __kasan_record_aux_stack+0x8e/0xa0 [ 30.693758] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.694423] remove_vma+0x139/0x170 [ 30.694892] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.695468] do_vmi_munmap+0x1f1/0x2b0 [ 30.695977] __vm_munmap+0x138/0x3a0 [ 30.696463] __x64_sys_munmap+0x59/0x80 [ 30.696974] do_syscall_64+0x3f/0x90 [ 30.697479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.698147] [ 30.698370] The buggy address belongs to the object at ffff888016a68ae0 [ 30.698370] which belongs to the cache vm_area_struct of size 168 [ 30.699891] The buggy address is located 88 bytes inside of [ 30.699891] freed 168-byte region [ffff888016a68ae0, ffff888016a68b88) [ 30.701354] [ 30.701575] The buggy address belongs to the physical page: [ 30.702279] page:0000000059f3f94a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a68 [ 30.703437] memcg:ffff88800a3d4b01 [ 30.703876] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.704547] page_type: 0xffffffff() [ 30.705012] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.705980] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a3d4b01 [ 30.706928] page dumped because: kasan: bad access detected [ 30.707612] [ 30.707835] Memory state around the buggy address: [ 30.708436] ffff888016a68a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.709345] ffff888016a68a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.710244] >ffff888016a68b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.711125] ^ [ 30.711758] ffff888016a68b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.712654] ffff888016a68c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.713551] ================================================================== [ 30.714767] Disabling lock debugging due to kernel taint [ 32.569402] BUG: Bad rss-counter state mm:000000008b569208 type:MM_FILEPAGES val:33 [ 32.570576] BUG: Bad rss-counter state mm:000000008b569208 type:MM_ANONPAGES val:22 [ 33.086404] BUG: Bad rss-counter state mm:000000008bd3eba5 type:MM_FILEPAGES val:33 [ 33.087711] BUG: Bad rss-counter state mm:000000008bd3eba5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59567' (ECDSA) to the list of known hosts. 2023/06/20 23:23:01 fuzzer started 2023/06/20 23:23:01 dialing manager at localhost:36067 2023/06/20 23:23:01 checking machine... 2023/06/20 23:23:01 checking revisions... [ 33.810442] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:23:02 testing simple program... [ 33.853529] cgroup: Unknown subsys name 'net' [ 33.911820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:23:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888016f2f550 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11002de5eab RIP=ffffffff845368c8 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 00007f9472ccd700 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=00007f97caa5f440 CR3=00000000096c8000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031303a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343235 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9e5d4c5618 CR3=0000000019ce2000 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=563412feff00545000000000000080fe 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