syzkaller login: [ 32.982136] BUG: Bad rss-counter state mm:00000000da420a74 type:MM_FILEPAGES val:33 [ 32.983069] BUG: Bad rss-counter state mm:00000000da420a74 type:MM_ANONPAGES val:22 [ 33.097579] ================================================================== [ 33.098233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.098896] Read of size 8 at addr ffff88800fc8f3f8 by task sshd/219 [ 33.099401] [ 33.099548] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.100134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.100821] Call Trace: [ 33.101047] [ 33.101262] dump_stack_lvl+0x91/0xf0 [ 33.101616] print_report+0xcc/0x620 [ 33.102061] ? __virt_addr_valid+0x102/0x340 [ 33.102459] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.102900] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.103328] kasan_report+0xbe/0xf0 [ 33.103654] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.104074] vma_interval_tree_remove+0xc75/0xec0 [ 33.104516] vma_prepare+0xc54/0x11a0 [ 33.104846] __split_vma+0x5af/0x950 [ 33.105185] ? __pfx___split_vma+0x10/0x10 [ 33.105539] ? find_held_lock+0x2c/0x110 [ 33.105895] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.106300] ? lock_is_held_type+0x9f/0x120 [ 33.106674] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.107109] ? mtree_range_walk+0x632/0x900 [ 33.107483] ? mas_walk+0x5c7/0x7c0 [ 33.107794] do_vmi_munmap+0x1f1/0x2b0 [ 33.108124] mmap_region+0x1f9/0x2660 [ 33.108458] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.108793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.109325] ? __pfx_lock_acquire+0x10/0x10 [ 33.109689] ? __pfx_mmap_region+0x10/0x10 [ 33.110060] ? security_mmap_addr+0x7d/0xa0 [ 33.110420] ? get_unmapped_area+0x1f5/0x3f0 [ 33.110773] do_mmap+0x854/0xf00 [ 33.111060] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.111389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.111766] ksys_mmap_pgoff+0x3af/0x500 [ 33.112131] do_syscall_64+0x3f/0x90 [ 33.112491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.112944] RIP: 0033:0x7f609b0a5d82 [ 33.113272] 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 [ 33.114776] RSP: 002b:00007ffd791c6668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.115420] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f609b0a5d82 [ 33.116008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f609a4df000 [ 33.116663] RBP: 00007f609a4df000 R08: 0000000000000009 R09: 0000000000001000 [ 33.117253] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9253c5d90 [ 33.117856] R13: 00007ffd791c6680 R14: 00007ffd791c66b0 R15: 00007ffd791c6a10 [ 33.118466] [ 33.118669] [ 33.118832] Allocated by task 212: [ 33.119131] kasan_save_stack+0x22/0x50 [ 33.119485] kasan_set_track+0x25/0x30 [ 33.119828] __kasan_slab_alloc+0x59/0x70 [ 33.120214] kmem_cache_alloc+0x16b/0x370 [ 33.120588] vm_area_dup+0x20/0x160 [ 33.120898] __split_vma+0x170/0x950 [ 33.121223] split_vma+0xc6/0x110 [ 33.121521] mprotect_fixup+0x8d2/0xb30 [ 33.121861] do_mprotect_pkey+0x87e/0xd40 [ 33.122224] __x64_sys_mprotect+0x78/0xc0 [ 33.122596] do_syscall_64+0x3f/0x90 [ 33.122928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.123376] [ 33.123511] Freed by task 19: [ 33.123778] kasan_save_stack+0x22/0x50 [ 33.124128] kasan_set_track+0x25/0x30 [ 33.124495] kasan_save_free_info+0x2b/0x50 [ 33.124870] __kasan_slab_free+0x10a/0x190 [ 33.125248] kmem_cache_free+0x10d/0x4d0 [ 33.125592] rcu_core+0x8c8/0x2860 [ 33.125910] __do_softirq+0x1b7/0x7d4 [ 33.126261] [ 33.126412] Last potentially related work creation: [ 33.126822] kasan_save_stack+0x22/0x50 [ 33.127196] __kasan_record_aux_stack+0x8e/0xa0 [ 33.127581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.128047] remove_vma+0x139/0x170 [ 33.128363] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.128768] do_vmi_munmap+0x1f1/0x2b0 [ 33.129106] __vm_munmap+0x138/0x3a0 [ 33.129418] __x64_sys_munmap+0x59/0x80 [ 33.129759] do_syscall_64+0x3f/0x90 [ 33.130090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.130539] [ 33.130696] The buggy address belongs to the object at ffff88800fc8f3a0 [ 33.130696] which belongs to the cache vm_area_struct of size 168 [ 33.131728] The buggy address is located 88 bytes inside of [ 33.131728] freed 168-byte region [ffff88800fc8f3a0, ffff88800fc8f448) [ 33.132711] [ 33.132864] The buggy address belongs to the physical page: [ 33.133321] page:00000000f304a859 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc8f [ 33.134076] memcg:ffff8880141d0901 [ 33.134386] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.134832] page_type: 0xffffffff() [ 33.135146] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.135785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880141d0901 [ 33.136416] page dumped because: kasan: bad access detected [ 33.136903] [ 33.137056] Memory state around the buggy address: [ 33.137480] ffff88800fc8f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.138073] ffff88800fc8f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.138668] >ffff88800fc8f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.139267] ^ [ 33.139873] ffff88800fc8f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.140491] ffff88800fc8f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.141081] ================================================================== [ 33.142231] Disabling lock debugging due to kernel taint [ 35.048080] BUG: Bad rss-counter state mm:000000001e23b240 type:MM_FILEPAGES val:33 [ 35.048801] BUG: Bad rss-counter state mm:000000001e23b240 type:MM_ANONPAGES val:22 [ 35.390091] BUG: Bad rss-counter state mm:00000000f06c6fe8 type:MM_FILEPAGES val:33 [ 35.390820] BUG: Bad rss-counter state mm:00000000f06c6fe8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60905' (ECDSA) to the list of known hosts. 2023/06/20 09:36:18 fuzzer started 2023/06/20 09:36:18 dialing manager at localhost:44161 2023/06/20 09:36:18 checking machine... 2023/06/20 09:36:18 checking revisions... [ 35.975895] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:36:18 testing simple program... [ 36.010485] cgroup: Unknown subsys name 'net' [ 36.056390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:16 Registers: info registers vcpu 0 RAX=2cc2a276dd151d00 RBX=0000562fdf362e90 RCX=0000000000000000 RDX=ffff888016b17cf8 RSI=0000000000000000 RDI=0000562fdf362e90 RBP=0000000000000000 RSP=ffff888016b17a50 R8 =ffff888016b17c30 R9 =0000000000000000 R10=00000000ffffffff R11=0000000000000000 R12=ffff8880142151c0 R13=dffffc0000000000 R14=ffff888016b17cc0 R15=0000000000000000 RIP=ffffffff81402447 RFL=00000282 [--S----] 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 00007fa59eb9d700 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=00007ffe9b40f8c8 CR3=0000000014322000 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=2038313a36333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a36333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888015807618 RCX=0000000000000001 RDX=ffff888015807588 RSI=ffff888015807550 RDI=ffff888015807590 RBP=dffffc0000000000 RSP=ffff888015807530 R8 =0000000000000001 R9 =ffff8880158075c0 R10=0000000000038001 R11=0000000000006097 R12=ffffed1002b00eb2 R13=ffffed1002b00eb1 R14=ffff8880158075c8 R15=ffff888015807580 RIP=ffffffff81132f8e RFL=00000212 [----A--] 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 00007fd311467900 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=00007fd311a1e618 CR3=000000000c7a4000 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