syzkaller login: [ 31.383342] BUG: Bad rss-counter state mm:000000007c5b421b type:MM_FILEPAGES val:33 [ 31.384549] BUG: Bad rss-counter state mm:000000007c5b421b type:MM_ANONPAGES val:22 [ 31.509926] ================================================================== [ 31.510845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.511813] Read of size 8 at addr ffff88800d993d08 by task sshd/220 [ 31.512580] [ 31.512799] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.513659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.514763] Call Trace: [ 31.515085] [ 31.515370] dump_stack_lvl+0x91/0xf0 [ 31.515884] print_report+0xcc/0x620 [ 31.516369] ? __virt_addr_valid+0x102/0x340 [ 31.516923] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.517538] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.518154] kasan_report+0xbe/0xf0 [ 31.518629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.519256] vma_interval_tree_remove+0xc75/0xec0 [ 31.519870] vma_prepare+0xc54/0x11a0 [ 31.520349] __split_vma+0x5af/0x950 [ 31.520825] ? __pfx___split_vma+0x10/0x10 [ 31.521357] ? find_held_lock+0x2c/0x110 [ 31.521881] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.522467] ? lock_is_held_type+0x9f/0x120 [ 31.523022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.523658] ? mtree_range_walk+0x632/0x900 [ 31.524219] ? mas_walk+0x5c7/0x7c0 [ 31.524696] do_vmi_munmap+0x1f1/0x2b0 [ 31.525194] mmap_region+0x1f9/0x2660 [ 31.525685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.526252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.526971] ? __pfx_lock_acquire+0x10/0x10 [ 31.527531] ? __pfx_mmap_region+0x10/0x10 [ 31.528075] ? security_mmap_addr+0x7d/0xa0 [ 31.528607] ? get_unmapped_area+0x1f5/0x3f0 [ 31.529161] do_mmap+0x854/0xf00 [ 31.529597] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.530090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.530654] ksys_mmap_pgoff+0x3af/0x500 [ 31.531165] do_syscall_64+0x3f/0x90 [ 31.531665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.532322] RIP: 0033:0x7f532a01bd82 [ 31.532784] 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 [ 31.534912] RSP: 002b:00007ffdd437e3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.535849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f532a01bd82 [ 31.536720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5329455000 [ 31.537573] RBP: 00007f5329455000 R08: 0000000000000009 R09: 0000000000001000 [ 31.538426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7479efec0 [ 31.539283] R13: 00007ffdd437e3d0 R14: 00007ffdd437e400 R15: 00007ffdd437e760 [ 31.540147] [ 31.540439] [ 31.540656] Allocated by task 213: [ 31.541091] kasan_save_stack+0x22/0x50 [ 31.541601] kasan_set_track+0x25/0x30 [ 31.542096] __kasan_slab_alloc+0x59/0x70 [ 31.542617] kmem_cache_alloc+0x16b/0x370 [ 31.543133] vm_area_dup+0x20/0x160 [ 31.543601] __split_vma+0x170/0x950 [ 31.544065] split_vma+0xc6/0x110 [ 31.544510] mprotect_fixup+0x8d2/0xb30 [ 31.545015] do_mprotect_pkey+0x87e/0xd40 [ 31.545539] __x64_sys_mprotect+0x78/0xc0 [ 31.546063] do_syscall_64+0x3f/0x90 [ 31.546540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547179] [ 31.547393] Freed by task 213: [ 31.547796] kasan_save_stack+0x22/0x50 [ 31.548299] kasan_set_track+0x25/0x30 [ 31.548797] kasan_save_free_info+0x2b/0x50 [ 31.549333] __kasan_slab_free+0x10a/0x190 [ 31.549876] kmem_cache_free+0x10d/0x4d0 [ 31.550385] rcu_core+0x8c8/0x2860 [ 31.550833] __do_softirq+0x1b7/0x7d4 [ 31.551310] [ 31.551547] Last potentially related work creation: [ 31.552133] kasan_save_stack+0x22/0x50 [ 31.552631] __kasan_record_aux_stack+0x8e/0xa0 [ 31.553213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.553857] remove_vma+0x139/0x170 [ 31.554308] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.554863] do_vmi_munmap+0x1f1/0x2b0 [ 31.555354] __vm_munmap+0x138/0x3a0 [ 31.555829] __x64_sys_munmap+0x59/0x80 [ 31.556334] do_syscall_64+0x3f/0x90 [ 31.556807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.557450] [ 31.557663] Second to last potentially related work creation: [ 31.558343] kasan_save_stack+0x22/0x50 [ 31.558847] __kasan_record_aux_stack+0x8e/0xa0 [ 31.559444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.560112] remove_vma+0x139/0x170 [ 31.560582] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.561163] do_vmi_munmap+0x1f1/0x2b0 [ 31.561656] mmap_region+0x1f9/0x2660 [ 31.562138] do_mmap+0x854/0xf00 [ 31.562569] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.563057] ksys_mmap_pgoff+0x3af/0x500 [ 31.563588] do_syscall_64+0x3f/0x90 [ 31.564067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.564719] [ 31.564941] The buggy address belongs to the object at ffff88800d993cb0 [ 31.564941] which belongs to the cache vm_area_struct of size 168 [ 31.566427] The buggy address is located 88 bytes inside of [ 31.566427] freed 168-byte region [ffff88800d993cb0, ffff88800d993d58) [ 31.567870] [ 31.568091] The buggy address belongs to the physical page: [ 31.568754] page:000000007df4dd57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd993 [ 31.569850] memcg:ffff888013fe4301 [ 31.570290] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.570995] page_type: 0xffffffff() [ 31.571456] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.572405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fe4301 [ 31.573322] page dumped because: kasan: bad access detected [ 31.573992] [ 31.574209] Memory state around the buggy address: [ 31.574793] ffff88800d993c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.575663] ffff88800d993c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.576533] >ffff88800d993d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.577394] ^ [ 31.577832] ffff88800d993d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.578709] ffff88800d993e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.579580] ================================================================== [ 31.580661] Disabling lock debugging due to kernel taint [ 34.357563] BUG: Bad rss-counter state mm:00000000dbc0aecd type:MM_FILEPAGES val:33 [ 34.358795] BUG: Bad rss-counter state mm:00000000dbc0aecd type:MM_ANONPAGES val:22 [ 34.974043] BUG: Bad rss-counter state mm:000000006c3f1f52 type:MM_FILEPAGES val:33 [ 34.975227] BUG: Bad rss-counter state mm:000000006c3f1f52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50584' (ECDSA) to the list of known hosts. 2023/06/21 06:34:44 fuzzer started 2023/06/21 06:34:45 dialing manager at localhost:36067 2023/06/21 06:34:45 checking machine... 2023/06/21 06:34:45 checking revisions... [ 35.665322] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:34:45 testing simple program... [ 35.713384] cgroup: Unknown subsys name 'net' [ 35.762348] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:34:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff9f545fa8 CR3=0000000005482000 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=00007fcca6c7b5100000563b43e0b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86138eb4 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09dc8 R15=ffff88806cf09a78 RIP=ffffffff81130bb0 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 00007f76acadd700 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=00007fe16a5cc8d0 CR3=0000000015ccc000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034343a3433 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000