syzkaller login: [ 36.052278] BUG: Bad rss-counter state mm:00000000cdfe19ca type:MM_FILEPAGES val:33 [ 36.053506] BUG: Bad rss-counter state mm:00000000cdfe19ca type:MM_ANONPAGES val:22 [ 36.091876] ================================================================== [ 36.092963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.093937] Read of size 8 at addr ffff888009531c20 by task sshd/219 [ 36.094744] [ 36.094967] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.095870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.096912] Call Trace: [ 36.097241] [ 36.097544] dump_stack_lvl+0x91/0xf0 [ 36.098046] print_report+0xcc/0x620 [ 36.098564] ? __virt_addr_valid+0x102/0x340 [ 36.099129] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.099785] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.100427] kasan_report+0xbe/0xf0 [ 36.100932] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.101617] vma_interval_tree_remove+0xc75/0xec0 [ 36.102238] vma_prepare+0xc54/0x11a0 [ 36.102732] __split_vma+0x5af/0x950 [ 36.103210] ? __pfx___split_vma+0x10/0x10 [ 36.103780] ? find_held_lock+0x2c/0x110 [ 36.104319] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.104915] ? lock_is_held_type+0x9f/0x120 [ 36.105468] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.106123] ? mtree_range_walk+0x632/0x900 [ 36.106701] ? mas_walk+0x5c7/0x7c0 [ 36.107200] do_vmi_munmap+0x1f1/0x2b0 [ 36.107718] mmap_region+0x1f9/0x2660 [ 36.108214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.108752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.109493] ? __pfx_lock_acquire+0x10/0x10 [ 36.110043] ? __pfx_mmap_region+0x10/0x10 [ 36.110623] ? security_mmap_addr+0x7d/0xa0 [ 36.111166] ? get_unmapped_area+0x1f5/0x3f0 [ 36.111758] do_mmap+0x854/0xf00 [ 36.112202] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.112721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.113285] ksys_mmap_pgoff+0x3af/0x500 [ 36.113818] do_syscall_64+0x3f/0x90 [ 36.114297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.114971] RIP: 0033:0x7f7b41ab3d82 [ 36.115436] 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 [ 36.117625] RSP: 002b:00007ffeda6c9b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.118552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b41ab3d82 [ 36.119397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b40eed000 [ 36.120286] RBP: 00007f7b40eed000 R08: 0000000000000009 R09: 0000000000001000 [ 36.121159] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0fcd4aec0 [ 36.122032] R13: 00007ffeda6c9ba0 R14: 00007ffeda6c9bd0 R15: 00007ffeda6c9f30 [ 36.122918] [ 36.123215] [ 36.123435] Allocated by task 212: [ 36.123902] kasan_save_stack+0x22/0x50 [ 36.124423] kasan_set_track+0x25/0x30 [ 36.124938] __kasan_slab_alloc+0x59/0x70 [ 36.125484] kmem_cache_alloc+0x16b/0x370 [ 36.126016] vm_area_dup+0x20/0x160 [ 36.126500] __split_vma+0x170/0x950 [ 36.126983] split_vma+0xc6/0x110 [ 36.127426] mprotect_fixup+0x8d2/0xb30 [ 36.128155] do_mprotect_pkey+0x87e/0xd40 [ 36.128809] __x64_sys_mprotect+0x78/0xc0 [ 36.129486] do_syscall_64+0x3f/0x90 [ 36.130086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.130889] [ 36.131198] Freed by task 212: [ 36.131711] kasan_save_stack+0x22/0x50 [ 36.132376] kasan_set_track+0x25/0x30 [ 36.132991] kasan_save_free_info+0x2b/0x50 [ 36.133664] __kasan_slab_free+0x10a/0x190 [ 36.134326] kmem_cache_free+0x10d/0x4d0 [ 36.134943] rcu_core+0x8c8/0x2860 [ 36.135506] __do_softirq+0x1b7/0x7d4 [ 36.136087] [ 36.136352] Last potentially related work creation: [ 36.137081] kasan_save_stack+0x22/0x50 [ 36.137696] __kasan_record_aux_stack+0x8e/0xa0 [ 36.138408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.139212] remove_vma+0x139/0x170 [ 36.139785] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.140482] do_vmi_munmap+0x1f1/0x2b0 [ 36.141084] __vm_munmap+0x138/0x3a0 [ 36.141662] __x64_sys_munmap+0x59/0x80 [ 36.142286] do_syscall_64+0x3f/0x90 [ 36.142885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.143715] [ 36.143965] The buggy address belongs to the object at ffff888009531bc8 [ 36.143965] which belongs to the cache vm_area_struct of size 168 [ 36.145436] The buggy address is located 88 bytes inside of [ 36.145436] freed 168-byte region [ffff888009531bc8, ffff888009531c70) [ 36.146843] [ 36.147062] The buggy address belongs to the physical page: [ 36.147727] page:000000001ac5b244 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9531 [ 36.148812] memcg:ffff88800c684201 [ 36.149240] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.149938] page_type: 0xffffffff() [ 36.150389] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.151314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c684201 [ 36.152243] page dumped because: kasan: bad access detected [ 36.152916] [ 36.153148] Memory state around the buggy address: [ 36.153736] ffff888009531b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.154595] ffff888009531b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.155460] >ffff888009531c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.156322] ^ [ 36.156850] ffff888009531c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.157710] ffff888009531d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.158563] ================================================================== [ 36.159672] Disabling lock debugging due to kernel taint [ 38.072923] BUG: Bad rss-counter state mm:000000003a7eabdc type:MM_FILEPAGES val:33 [ 38.074158] BUG: Bad rss-counter state mm:000000003a7eabdc type:MM_ANONPAGES val:22 [ 38.540342] BUG: Bad rss-counter state mm:00000000cbbca242 type:MM_FILEPAGES val:33 [ 38.541526] BUG: Bad rss-counter state mm:00000000cbbca242 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55951' (ECDSA) to the list of known hosts. 2023/06/20 00:30:53 fuzzer started 2023/06/20 00:30:54 dialing manager at localhost:44161 2023/06/20 00:30:54 checking machine... 2023/06/20 00:30:54 checking revisions... [ 39.261057] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:30:54 testing simple program... [ 39.312641] cgroup: Unknown subsys name 'net' [ 39.355986] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff9a958738 CR3=000000000f80e000 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=2033353a30333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a30333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88800f5afc80 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a85c R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888018c21b40 R15=ffff88800cb81450 RIP=ffffffff8113038e 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 00007fae48169900 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=00007fae48720618 CR3=000000000bbc4000 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