syzkaller login: [ 43.268462] BUG: Bad rss-counter state mm:00000000951f8050 type:MM_FILEPAGES val:33 [ 43.269655] BUG: Bad rss-counter state mm:00000000951f8050 type:MM_ANONPAGES val:22 [ 43.415623] ================================================================== [ 43.416541] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.417476] Read of size 8 at addr ffff88800ee9da50 by task sshd/221 [ 43.418259] [ 43.418557] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.419440] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.420418] Call Trace: [ 43.420751] [ 43.421043] dump_stack_lvl+0x91/0xf0 [ 43.421529] print_report+0xcc/0x620 [ 43.422054] ? __virt_addr_valid+0x102/0x340 [ 43.422610] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.423232] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.423840] kasan_report+0xbe/0xf0 [ 43.424316] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.424939] vma_interval_tree_remove+0xc75/0xec0 [ 43.425540] vma_prepare+0xc54/0x11a0 [ 43.426044] __split_vma+0x5af/0x950 [ 43.426524] ? __pfx___split_vma+0x10/0x10 [ 43.427062] ? find_held_lock+0x2c/0x110 [ 43.427589] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.428165] ? lock_is_held_type+0x9f/0x120 [ 43.428704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.429319] ? mtree_range_walk+0x632/0x900 [ 43.429882] ? mas_walk+0x5c7/0x7c0 [ 43.430357] do_vmi_munmap+0x1f1/0x2b0 [ 43.430852] mmap_region+0x1f9/0x2660 [ 43.431333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.431845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.432564] ? __pfx_lock_acquire+0x10/0x10 [ 43.433102] ? __pfx_mmap_region+0x10/0x10 [ 43.433653] ? security_mmap_addr+0x7d/0xa0 [ 43.434178] ? get_unmapped_area+0x1f5/0x3f0 [ 43.434729] do_mmap+0x854/0xf00 [ 43.435179] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.435678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.436247] ksys_mmap_pgoff+0x3af/0x500 [ 43.436749] do_syscall_64+0x3f/0x90 [ 43.437227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.437893] RIP: 0033:0x7f29502a9d82 [ 43.438371] 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 [ 43.440477] RSP: 002b:00007fff9988b9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.441399] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29502a9d82 [ 43.442281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f294f6e3000 [ 43.443139] RBP: 00007f294f6e3000 R08: 0000000000000009 R09: 0000000000001000 [ 43.443982] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616e5a74ec0 [ 43.444824] R13: 00007fff9988b9f0 R14: 00007fff9988ba20 R15: 00007fff9988bd80 [ 43.445712] [ 43.446002] [ 43.446220] Allocated by task 214: [ 43.446643] kasan_save_stack+0x22/0x50 [ 43.447146] kasan_set_track+0x25/0x30 [ 43.447642] __kasan_slab_alloc+0x59/0x70 [ 43.448171] kmem_cache_alloc+0x16b/0x370 [ 43.448681] vm_area_dup+0x20/0x160 [ 43.449138] __split_vma+0x170/0x950 [ 43.449614] split_vma+0xc6/0x110 [ 43.450051] mprotect_fixup+0x8d2/0xb30 [ 43.450553] do_mprotect_pkey+0x87e/0xd40 [ 43.451082] __x64_sys_mprotect+0x78/0xc0 [ 43.451601] do_syscall_64+0x3f/0x90 [ 43.452075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.452716] [ 43.452929] Freed by task 214: [ 43.453321] kasan_save_stack+0x22/0x50 [ 43.453850] kasan_set_track+0x25/0x30 [ 43.454357] kasan_save_free_info+0x2b/0x50 [ 43.454895] __kasan_slab_free+0x10a/0x190 [ 43.455429] kmem_cache_free+0x10d/0x4d0 [ 43.455932] rcu_core+0x8c8/0x2860 [ 43.456381] __do_softirq+0x1b7/0x7d4 [ 43.456863] [ 43.457076] Last potentially related work creation: [ 43.457666] kasan_save_stack+0x22/0x50 [ 43.458176] __kasan_record_aux_stack+0x8e/0xa0 [ 43.458741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.459381] remove_vma+0x139/0x170 [ 43.459833] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.460398] do_vmi_munmap+0x1f1/0x2b0 [ 43.460898] __vm_munmap+0x138/0x3a0 [ 43.461362] __x64_sys_munmap+0x59/0x80 [ 43.461888] do_syscall_64+0x3f/0x90 [ 43.462354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.462996] [ 43.463214] The buggy address belongs to the object at ffff88800ee9d9f8 [ 43.463214] which belongs to the cache vm_area_struct of size 168 [ 43.464699] The buggy address is located 88 bytes inside of [ 43.464699] freed 168-byte region [ffff88800ee9d9f8, ffff88800ee9daa0) [ 43.466141] [ 43.466359] The buggy address belongs to the physical page: [ 43.467023] page:000000008ce3813d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee9d [ 43.468114] memcg:ffff88800e6f1c01 [ 43.468540] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.469188] page_type: 0xffffffff() [ 43.469660] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.470577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6f1c01 [ 43.471480] page dumped because: kasan: bad access detected [ 43.472136] [ 43.472353] Memory state around the buggy address: [ 43.472934] ffff88800ee9d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.473795] ffff88800ee9d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 43.474662] >ffff88800ee9da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.475516] ^ [ 43.476216] ffff88800ee9da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 43.477080] ffff88800ee9db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.477962] ================================================================== [ 43.478934] Disabling lock debugging due to kernel taint [ 45.290134] BUG: Bad rss-counter state mm:000000008ec5f225 type:MM_FILEPAGES val:33 [ 45.291337] BUG: Bad rss-counter state mm:000000008ec5f225 type:MM_ANONPAGES val:22 [ 45.769662] BUG: Bad rss-counter state mm:0000000081c00e65 type:MM_FILEPAGES val:33 [ 45.770828] BUG: Bad rss-counter state mm:0000000081c00e65 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31834' (ECDSA) to the list of known hosts. 2023/06/20 02:12:46 fuzzer started 2023/06/20 02:12:46 dialing manager at localhost:44161 2023/06/20 02:12:46 checking machine... 2023/06/20 02:12:46 checking revisions... [ 46.384297] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:12:46 testing simple program... [ 46.417059] cgroup: Unknown subsys name 'net' [ 46.461131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:12:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=ffff888017401b40 RSI=ffffffff822443e1 RDI=ffffffff822443e6 RBP=0000000000000020 RSP=ffff88800f147cd8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000000 R12=ffff88800f1ae170 R13=0000000000000001 R14=ffff88800f1ae170 R15=800000001a4b4067 RIP=ffffffff81534337 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2b024ac900 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=00007ffcb888de0c CR3=000000000eaec000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=204c6e035372653c20322e322e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=000056468e6993c8 CR3=0000000016bd2000 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=32313a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000