syzkaller login: [ 32.821036] BUG: Bad rss-counter state mm:00000000c28d3a35 type:MM_FILEPAGES val:33 [ 32.822485] BUG: Bad rss-counter state mm:00000000c28d3a35 type:MM_ANONPAGES val:22 [ 32.976209] ================================================================== [ 32.977068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.977954] Read of size 8 at addr ffff88800dd56968 by task sshd/220 [ 32.978672] [ 32.978879] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.979817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.980766] Call Trace: [ 32.981069] [ 32.981362] dump_stack_lvl+0x91/0xf0 [ 32.981829] print_report+0xcc/0x620 [ 32.982293] ? __virt_addr_valid+0x102/0x340 [ 32.982812] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.983394] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.984002] kasan_report+0xbe/0xf0 [ 32.984450] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.985038] vma_interval_tree_remove+0xc75/0xec0 [ 32.985610] vma_prepare+0xc54/0x11a0 [ 32.986066] __split_vma+0x5af/0x950 [ 32.986512] ? __pfx___split_vma+0x10/0x10 [ 32.987035] ? find_held_lock+0x2c/0x110 [ 32.987561] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.988131] ? lock_is_held_type+0x9f/0x120 [ 32.988666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.989261] ? mtree_range_walk+0x632/0x900 [ 32.989812] ? mas_walk+0x5c7/0x7c0 [ 32.990277] do_vmi_munmap+0x1f1/0x2b0 [ 32.990761] mmap_region+0x1f9/0x2660 [ 32.991236] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.991741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.992461] ? __pfx_lock_acquire+0x10/0x10 [ 32.992988] ? __pfx_mmap_region+0x10/0x10 [ 32.993515] ? security_mmap_addr+0x7d/0xa0 [ 32.994034] ? get_unmapped_area+0x1f5/0x3f0 [ 32.994582] do_mmap+0x854/0xf00 [ 32.995015] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.995504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.996054] ksys_mmap_pgoff+0x3af/0x500 [ 32.996554] do_syscall_64+0x3f/0x90 [ 32.997017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.997661] RIP: 0033:0x7fa363243d82 [ 32.998103] 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 [ 33.000179] RSP: 002b:00007fffa898f8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.001073] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa363243d82 [ 33.001906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa36267d000 [ 33.002738] RBP: 00007fa36267d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.003567] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653b4f57d90 [ 33.004410] R13: 00007fffa898f910 R14: 00007fffa898f940 R15: 00007fffa898fca0 [ 33.005257] [ 33.005541] [ 33.005751] Allocated by task 213: [ 33.006169] kasan_save_stack+0x22/0x50 [ 33.006665] kasan_set_track+0x25/0x30 [ 33.007146] __kasan_slab_alloc+0x59/0x70 [ 33.007667] kmem_cache_alloc+0x16b/0x370 [ 33.008177] vm_area_dup+0x20/0x160 [ 33.008621] __split_vma+0x170/0x950 [ 33.009070] split_vma+0xc6/0x110 [ 33.009499] mprotect_fixup+0x8d2/0xb30 [ 33.009994] do_mprotect_pkey+0x87e/0xd40 [ 33.010511] __x64_sys_mprotect+0x78/0xc0 [ 33.011016] do_syscall_64+0x3f/0x90 [ 33.011476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.012122] [ 33.012335] Freed by task 19: [ 33.012714] kasan_save_stack+0x22/0x50 [ 33.013211] kasan_set_track+0x25/0x30 [ 33.013700] kasan_save_free_info+0x2b/0x50 [ 33.014219] __kasan_slab_free+0x10a/0x190 [ 33.014743] kmem_cache_free+0x10d/0x4d0 [ 33.015241] rcu_core+0x8c8/0x2860 [ 33.015680] __do_softirq+0x1b7/0x7d4 [ 33.016156] [ 33.016368] Last potentially related work creation: [ 33.016938] kasan_save_stack+0x22/0x50 [ 33.017438] __kasan_record_aux_stack+0x8e/0xa0 [ 33.017997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.018630] remove_vma+0x139/0x170 [ 33.019068] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.019614] do_vmi_munmap+0x1f1/0x2b0 [ 33.020117] __vm_munmap+0x138/0x3a0 [ 33.020572] __x64_sys_munmap+0x59/0x80 [ 33.021047] do_syscall_64+0x3f/0x90 [ 33.021511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.022136] [ 33.022345] The buggy address belongs to the object at ffff88800dd56910 [ 33.022345] which belongs to the cache vm_area_struct of size 168 [ 33.023778] The buggy address is located 88 bytes inside of [ 33.023778] freed 168-byte region [ffff88800dd56910, ffff88800dd569b8) [ 33.025150] [ 33.025361] The buggy address belongs to the physical page: [ 33.026008] page:0000000085ff5438 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd56 [ 33.027062] memcg:ffff88800bb55201 [ 33.027482] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.028185] page_type: 0xffffffff() [ 33.028622] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.029515] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bb55201 [ 33.030396] page dumped because: kasan: bad access detected [ 33.031035] [ 33.031245] Memory state around the buggy address: [ 33.031807] ffff88800dd56800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.032670] ffff88800dd56880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.033502] >ffff88800dd56900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.034337] ^ [ 33.035161] ffff88800dd56980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.036098] ffff88800dd56a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.037027] ================================================================== [ 33.038123] Disabling lock debugging due to kernel taint [ 34.940371] BUG: Bad rss-counter state mm:0000000004ee0ba6 type:MM_FILEPAGES val:33 [ 34.941255] BUG: Bad rss-counter state mm:0000000004ee0ba6 type:MM_ANONPAGES val:22 [ 35.492954] BUG: Bad rss-counter state mm:00000000c37be983 type:MM_FILEPAGES val:33 [ 35.494123] BUG: Bad rss-counter state mm:00000000c37be983 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15987' (ECDSA) to the list of known hosts. 2023/06/20 05:39:59 fuzzer started 2023/06/20 05:39:59 dialing manager at localhost:44161 2023/06/20 05:39:59 checking machine... 2023/06/20 05:39:59 checking revisions... [ 36.114079] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:39:59 testing simple program... [ 36.158173] cgroup: Unknown subsys name 'net' [ 36.203474] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:39:57 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000036000 RSI=0000000000036000 RDI=ffffffff865bfbc0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113078b 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 00007f89c33b9900 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=00007f89c396e650 CR3=000000000db1e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f53ec76f730 CR3=000000000e3ea000 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=f4133e07168e6a8e2f4af1e01786df3e XMM02=ec2efd57dc4c00df000000000011fad0 XMM03=09b007af5323bdd9000000000011fba0 XMM04=07e0337296605ba200000000000ae988 XMM05=6534057640f511170000000000134f58 XMM06=19e9129bd510f2350000000000133df0 XMM07=fb795ef6d657705600000000001242e0 XMM08=2c67c8bc2e329bc3000000000011fb40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000