syzkaller login: [ 30.372371] BUG: Bad rss-counter state mm:000000007fe9def9 type:MM_FILEPAGES val:33 [ 30.373034] BUG: Bad rss-counter state mm:000000007fe9def9 type:MM_ANONPAGES val:22 [ 30.422868] ================================================================== [ 30.423477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.424097] Read of size 8 at addr ffff888018009798 by task sshd/221 [ 30.424643] [ 30.424789] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.428552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.429182] Call Trace: [ 30.429399] [ 30.429592] dump_stack_lvl+0x91/0xf0 [ 30.432416] print_report+0xcc/0x620 [ 30.432744] ? __virt_addr_valid+0x102/0x340 [ 30.433100] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.440544] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.440966] kasan_report+0xbe/0xf0 [ 30.441285] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.441697] vma_interval_tree_remove+0xc75/0xec0 [ 30.442099] vma_prepare+0xc54/0x11a0 [ 30.442416] __split_vma+0x5af/0x950 [ 30.442739] ? __pfx___split_vma+0x10/0x10 [ 30.443084] ? find_held_lock+0x2c/0x110 [ 30.443416] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.443769] ? lock_is_held_type+0x9f/0x120 [ 30.444122] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.444611] ? mtree_range_walk+0x632/0x900 [ 30.444977] ? mas_walk+0x5c7/0x7c0 [ 30.445282] do_vmi_munmap+0x1f1/0x2b0 [ 30.445615] mmap_region+0x1f9/0x2660 [ 30.445945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.446294] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.446779] ? __pfx_lock_acquire+0x10/0x10 [ 30.447132] ? __pfx_mmap_region+0x10/0x10 [ 30.447484] ? security_mmap_addr+0x7d/0xa0 [ 30.447838] ? get_unmapped_area+0x1f5/0x3f0 [ 30.448204] do_mmap+0x854/0xf00 [ 30.452588] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.452932] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.453301] ksys_mmap_pgoff+0x3af/0x500 [ 30.453631] do_syscall_64+0x3f/0x90 [ 30.453947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.454375] RIP: 0033:0x7f1e3dc56d82 [ 30.454684] 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 [ 30.456068] RSP: 002b:00007ffe39f14a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.472614] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e3dc56d82 [ 30.473170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e3d090000 [ 30.473710] RBP: 00007f1e3d090000 R08: 0000000000000009 R09: 0000000000001000 [ 30.474262] R10: 0000000000000812 R11: 0000000000000206 R12: 000055982db8cd90 [ 30.474819] R13: 00007ffe39f14a30 R14: 00007ffe39f14a60 R15: 00007ffe39f14dc0 [ 30.475380] [ 30.475583] [ 30.475726] Allocated by task 214: [ 30.476010] kasan_save_stack+0x22/0x50 [ 30.476373] kasan_set_track+0x25/0x30 [ 30.476726] __kasan_slab_alloc+0x59/0x70 [ 30.477077] kmem_cache_alloc+0x16b/0x370 [ 30.477425] vm_area_dup+0x20/0x160 [ 30.477732] __split_vma+0x170/0x950 [ 30.478047] split_vma+0xc6/0x110 [ 30.478343] mprotect_fixup+0x8d2/0xb30 [ 30.478678] do_mprotect_pkey+0x87e/0xd40 [ 30.479023] __x64_sys_mprotect+0x78/0xc0 [ 30.479364] do_syscall_64+0x3f/0x90 [ 30.479671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.480072] [ 30.480218] Freed by task 0: [ 30.480521] kasan_save_stack+0x22/0x50 [ 30.480854] kasan_set_track+0x25/0x30 [ 30.481185] kasan_save_free_info+0x2b/0x50 [ 30.481541] __kasan_slab_free+0x10a/0x190 [ 30.481892] kmem_cache_free+0x10d/0x4d0 [ 30.482227] rcu_core+0x8c8/0x2860 [ 30.482522] __do_softirq+0x1b7/0x7d4 [ 30.482857] [ 30.483000] Last potentially related work creation: [ 30.483384] kasan_save_stack+0x22/0x50 [ 30.483720] __kasan_record_aux_stack+0x8e/0xa0 [ 30.484102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.484566] remove_vma+0x139/0x170 [ 30.484863] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.485226] do_vmi_munmap+0x1f1/0x2b0 [ 30.485548] __vm_munmap+0x138/0x3a0 [ 30.485855] __x64_sys_munmap+0x59/0x80 [ 30.486175] do_syscall_64+0x3f/0x90 [ 30.486489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.486918] [ 30.487056] The buggy address belongs to the object at ffff888018009740 [ 30.487056] which belongs to the cache vm_area_struct of size 168 [ 30.488005] The buggy address is located 88 bytes inside of [ 30.488005] freed 168-byte region [ffff888018009740, ffff8880180097e8) [ 30.496964] [ 30.497106] The buggy address belongs to the physical page: [ 30.497525] page:000000002342855d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18009 [ 30.498239] memcg:ffff8880198b5901 [ 30.498520] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.498976] page_type: 0xffffffff() [ 30.499270] raw: 0100000000000200 ffff8880087a0c80 ffffea0000600300 dead000000000003 [ 30.499871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198b5901 [ 30.500480] page dumped because: kasan: bad access detected [ 30.500922] [ 30.501069] Memory state around the buggy address: [ 30.501448] ffff888018009680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.502002] ffff888018009700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.502556] >ffff888018009780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.503118] ^ [ 30.503444] ffff888018009800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.504002] ffff888018009880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.504591] ================================================================== [ 30.505269] Disabling lock debugging due to kernel taint [ 35.120371] BUG: Bad rss-counter state mm:000000005169313c type:MM_FILEPAGES val:33 [ 35.120996] BUG: Bad rss-counter state mm:000000005169313c type:MM_ANONPAGES val:22 [ 35.638813] BUG: Bad rss-counter state mm:0000000077c45fc9 type:MM_FILEPAGES val:33 [ 35.641317] BUG: Bad rss-counter state mm:0000000077c45fc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2073' (ECDSA) to the list of known hosts. 2023/06/21 10:19:49 fuzzer started 2023/06/21 10:19:49 dialing manager at localhost:36067 2023/06/21 10:19:49 checking machine... 2023/06/21 10:19:49 checking revisions... [ 36.554360] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:19:49 testing simple program... [ 36.610758] cgroup: Unknown subsys name 'net' [ 36.724704] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:19:49 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f350000 RCX=0000000000000000 RDX=1ffff11001e6a208 RSI=ffffffff83018a8f RDI=000000000000000a RBP=0000000000000080 RSP=ffff88806ce09eb0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff88800f351040 R15=000000000000000a RIP=ffffffff83018ab7 RFL=00000046 [---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=00007f5696af5000 CR3=0000000009608000 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=f04a035ef2ea31bb514ddc6fdc4d5183 XMM02=2c67c8bc2e329bc3000000000011aeb8 XMM03=fb795ef6d65770560000000000121850 XMM04=92284e006fe5e9de00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131af8 XMM06=ba06661216643b070000000000130908 XMM07=e042d86d42eb936e0000000000121ad0 XMM08=143ce9c02bd09021000000000011af18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001e1dfb6 RBX=ffff88800f0efd98 RCX=0000000000000100 RDX=ffff888016a18000 RSI=ffffffff844dacdc RDI=ffff88800f0efdb0 RBP=ffff88806cf2c250 RSP=ffff88806cf09708 R8 =0000000000000006 R9 =ffff88806cf2c250 R10=ffff88806cf2c250 R11=0000000000000001 R12=dffffc0000000000 R13=0000000845653900 R14=0000000000000001 R15=0000000b195bbf7c RIP=ffffffff844dacf6 RFL=00000046 [---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=00007fcd966d2328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000