syzkaller login: [ 24.037407] BUG: Bad rss-counter state mm:0000000099efa401 type:MM_FILEPAGES val:33 [ 24.038620] BUG: Bad rss-counter state mm:0000000099efa401 type:MM_ANONPAGES val:22 [ 24.080032] ================================================================== [ 24.080948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.081889] Read of size 8 at addr ffff88800ddb9140 by task sshd/220 [ 24.082677] [ 24.082896] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.083757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.084740] Call Trace: [ 24.085060] [ 24.085352] dump_stack_lvl+0x91/0xf0 [ 24.085859] print_report+0xcc/0x620 [ 24.086351] ? __virt_addr_valid+0x102/0x340 [ 24.086909] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.087528] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.088150] kasan_report+0xbe/0xf0 [ 24.088630] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.089254] vma_interval_tree_remove+0xc75/0xec0 [ 24.089851] vma_prepare+0xc54/0x11a0 [ 24.090349] __split_vma+0x5af/0x950 [ 24.090820] ? __pfx___split_vma+0x10/0x10 [ 24.091343] ? find_held_lock+0x2c/0x110 [ 24.091862] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.092422] ? lock_is_held_type+0x9f/0x120 [ 24.092954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.093561] ? mtree_range_walk+0x632/0x900 [ 24.094121] ? mas_walk+0x5c7/0x7c0 [ 24.094593] do_vmi_munmap+0x1f1/0x2b0 [ 24.095079] mmap_region+0x1f9/0x2660 [ 24.095561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.096068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.096778] ? __pfx_lock_acquire+0x10/0x10 [ 24.097309] ? __pfx_mmap_region+0x10/0x10 [ 24.097838] ? security_mmap_addr+0x7d/0xa0 [ 24.098427] ? get_unmapped_area+0x1f5/0x3f0 [ 24.098984] do_mmap+0x854/0xf00 [ 24.099425] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.099923] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.100479] ksys_mmap_pgoff+0x3af/0x500 [ 24.100980] do_syscall_64+0x3f/0x90 [ 24.101468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.102118] RIP: 0033:0x7f9af27f6d82 [ 24.102578] 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 [ 24.104689] RSP: 002b:00007ffd85055fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.105591] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9af27f6d82 [ 24.106439] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9af1c30000 [ 24.107278] RBP: 00007f9af1c30000 R08: 0000000000000009 R09: 0000000000001000 [ 24.108120] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7c6257d90 [ 24.108960] R13: 00007ffd85056000 R14: 00007ffd85056030 R15: 00007ffd85056390 [ 24.109813] [ 24.110128] [ 24.110345] Allocated by task 213: [ 24.110772] kasan_save_stack+0x22/0x50 [ 24.111273] kasan_set_track+0x25/0x30 [ 24.111773] __kasan_slab_alloc+0x59/0x70 [ 24.112309] kmem_cache_alloc+0x16b/0x370 [ 24.112822] vm_area_dup+0x20/0x160 [ 24.113275] __split_vma+0x170/0x950 [ 24.113738] split_vma+0xc6/0x110 [ 24.114183] mprotect_fixup+0x8d2/0xb30 [ 24.114682] do_mprotect_pkey+0x87e/0xd40 [ 24.115208] __x64_sys_mprotect+0x78/0xc0 [ 24.115726] do_syscall_64+0x3f/0x90 [ 24.116199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.116847] [ 24.117065] Freed by task 213: [ 24.117468] kasan_save_stack+0x22/0x50 [ 24.117973] kasan_set_track+0x25/0x30 [ 24.118468] kasan_save_free_info+0x2b/0x50 [ 24.118998] __kasan_slab_free+0x10a/0x190 [ 24.119534] kmem_cache_free+0x10d/0x4d0 [ 24.120047] rcu_core+0x8c8/0x2860 [ 24.120488] __do_softirq+0x1b7/0x7d4 [ 24.120964] [ 24.121178] Last potentially related work creation: [ 24.121767] kasan_save_stack+0x22/0x50 [ 24.122289] __kasan_record_aux_stack+0x8e/0xa0 [ 24.122862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.123503] remove_vma+0x139/0x170 [ 24.123955] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.124509] do_vmi_munmap+0x1f1/0x2b0 [ 24.124995] __vm_munmap+0x138/0x3a0 [ 24.125466] __x64_sys_munmap+0x59/0x80 [ 24.125969] do_syscall_64+0x3f/0x90 [ 24.126446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.127081] [ 24.127297] Second to last potentially related work creation: [ 24.128100] kasan_save_stack+0x22/0x50 [ 24.128605] __kasan_record_aux_stack+0x8e/0xa0 [ 24.129176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.129812] remove_vma+0x139/0x170 [ 24.130268] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.130826] do_vmi_munmap+0x1f1/0x2b0 [ 24.131310] mmap_region+0x1f9/0x2660 [ 24.131786] do_mmap+0x854/0xf00 [ 24.132214] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.132697] ksys_mmap_pgoff+0x3af/0x500 [ 24.133193] do_syscall_64+0x3f/0x90 [ 24.133669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.134323] [ 24.134538] The buggy address belongs to the object at ffff88800ddb90e8 [ 24.134538] which belongs to the cache vm_area_struct of size 168 [ 24.136008] The buggy address is located 88 bytes inside of [ 24.136008] freed 168-byte region [ffff88800ddb90e8, ffff88800ddb9190) [ 24.137410] [ 24.137624] The buggy address belongs to the physical page: [ 24.138285] page:000000000dee2356 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddb9 [ 24.139370] memcg:ffff888014459b01 [ 24.139792] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.140433] page_type: 0xffffffff() [ 24.140891] raw: 0100000000000200 ffff88800879fc80 ffffea00005b40c0 dead000000000002 [ 24.141802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014459b01 [ 24.142724] page dumped because: kasan: bad access detected [ 24.143381] [ 24.143596] Memory state around the buggy address: [ 24.144172] ffff88800ddb9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.145031] ffff88800ddb9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.145884] >ffff88800ddb9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.146746] ^ [ 24.147393] ffff88800ddb9180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.148245] ffff88800ddb9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.149096] ================================================================== [ 24.150379] Disabling lock debugging due to kernel taint [ 26.419361] BUG: Bad rss-counter state mm:00000000c580c8cd type:MM_FILEPAGES val:33 [ 26.421108] BUG: Bad rss-counter state mm:00000000c580c8cd type:MM_ANONPAGES val:22 [ 26.944414] BUG: Bad rss-counter state mm:000000000fb7f386 type:MM_FILEPAGES val:33 [ 26.945500] BUG: Bad rss-counter state mm:000000000fb7f386 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61223' (ECDSA) to the list of known hosts. 2023/06/20 02:18:43 fuzzer started 2023/06/20 02:18:43 dialing manager at localhost:44161 2023/06/20 02:18:43 checking machine... 2023/06/20 02:18:43 checking revisions... [ 27.738939] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:18:43 testing simple program... [ 27.789743] cgroup: Unknown subsys name 'net' [ 27.845161] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:18:42 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09b01 RSI=ffff88806ce09b30 RDI=ffff88806ce09b30 RBP=ffff88806ce09af0 RSP=ffff88806ce099d0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b30 R15=ffff88806ce09a98 RIP=ffffffff8112fbf0 RFL=00000202 [-------] 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 00007f6c5e06c900 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=00007f6c5d48cff0 CR3=000000000c838000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=69bb2639bb3b34fa00000000000ae988 XMM05=f63f0a3ace91ca430000000000135f58 XMM06=4fda316b135da52b0000000000134c88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d167f RBX=0000000000000001 RCX=ffffffff860d167c RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff860d167e RBP=ffff888008e579d0 RSP=ffff888008e57908 R8 =0000000000000001 R9 =ffff888008e579b8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e57e60 R15=ffff888008e57978 RIP=ffffffff811311e5 RFL=00000297 [--S-APC] 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=00007f8062889618 CR3=0000000006986000 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=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