syzkaller login: [ 31.222830] BUG: Bad rss-counter state mm:00000000a9fd0927 type:MM_FILEPAGES val:33 [ 31.223563] BUG: Bad rss-counter state mm:00000000a9fd0927 type:MM_ANONPAGES val:22 [ 31.253583] ================================================================== [ 31.254405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.255133] Read of size 8 at addr ffff88800f154d08 by task sshd/219 [ 31.255768] [ 31.255941] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.256653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.257591] Call Trace: [ 31.257949] [ 31.258225] dump_stack_lvl+0x91/0xf0 [ 31.258657] print_report+0xcc/0x620 [ 31.259005] ? __virt_addr_valid+0x102/0x340 [ 31.259487] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259994] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260512] kasan_report+0xbe/0xf0 [ 31.260956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261447] vma_interval_tree_remove+0xc75/0xec0 [ 31.261934] vma_prepare+0xc54/0x11a0 [ 31.262366] __split_vma+0x5af/0x950 [ 31.262717] ? __pfx___split_vma+0x10/0x10 [ 31.263124] ? find_held_lock+0x2c/0x110 [ 31.263520] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.263990] ? lock_is_held_type+0x9f/0x120 [ 31.264362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.264821] ? mtree_range_walk+0x632/0x900 [ 31.265351] ? mas_walk+0x5c7/0x7c0 [ 31.265672] do_vmi_munmap+0x1f1/0x2b0 [ 31.266014] mmap_region+0x1f9/0x2660 [ 31.266325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.266653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.267118] ? __pfx_lock_acquire+0x10/0x10 [ 31.267459] ? __pfx_mmap_region+0x10/0x10 [ 31.267797] ? security_mmap_addr+0x7d/0xa0 [ 31.268152] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268520] do_mmap+0x854/0xf00 [ 31.268855] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269187] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.269576] ksys_mmap_pgoff+0x3af/0x500 [ 31.269915] do_syscall_64+0x3f/0x90 [ 31.270227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.270647] RIP: 0033:0x7ff35810ed82 [ 31.270946] 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 [ 31.272345] RSP: 002b:00007ffc0fe655d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.272988] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff35810ed82 [ 31.273578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff357548000 [ 31.274192] RBP: 00007ff357548000 R08: 0000000000000009 R09: 0000000000001000 [ 31.274773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac0f443ec0 [ 31.275350] R13: 00007ffc0fe655f0 R14: 00007ffc0fe65620 R15: 00007ffc0fe65980 [ 31.275950] [ 31.276163] [ 31.276317] Allocated by task 212: [ 31.276654] kasan_save_stack+0x22/0x50 [ 31.277015] kasan_set_track+0x25/0x30 [ 31.277370] __kasan_slab_alloc+0x59/0x70 [ 31.277740] kmem_cache_alloc+0x16b/0x370 [ 31.278100] vm_area_dup+0x20/0x160 [ 31.278425] __split_vma+0x170/0x950 [ 31.278767] split_vma+0xc6/0x110 [ 31.279089] mprotect_fixup+0x8d2/0xb30 [ 31.279447] do_mprotect_pkey+0x87e/0xd40 [ 31.279831] __x64_sys_mprotect+0x78/0xc0 [ 31.280229] do_syscall_64+0x3f/0x90 [ 31.280563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281047] [ 31.281205] Freed by task 212: [ 31.281507] kasan_save_stack+0x22/0x50 [ 31.281907] kasan_set_track+0x25/0x30 [ 31.282264] kasan_save_free_info+0x2b/0x50 [ 31.282634] __kasan_slab_free+0x10a/0x190 [ 31.283045] kmem_cache_free+0x10d/0x4d0 [ 31.283404] rcu_core+0x8c8/0x2860 [ 31.283743] __do_softirq+0x1b7/0x7d4 [ 31.284098] [ 31.284256] Last potentially related work creation: [ 31.284681] kasan_save_stack+0x22/0x50 [ 31.285028] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.285928] remove_vma+0x139/0x170 [ 31.286252] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286630] do_vmi_munmap+0x1f1/0x2b0 [ 31.286972] __vm_munmap+0x138/0x3a0 [ 31.287306] __x64_sys_munmap+0x59/0x80 [ 31.287650] do_syscall_64+0x3f/0x90 [ 31.287977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288433] [ 31.288580] The buggy address belongs to the object at ffff88800f154cb0 [ 31.288580] which belongs to the cache vm_area_struct of size 168 [ 31.289656] The buggy address is located 88 bytes inside of [ 31.289656] freed 168-byte region [ffff88800f154cb0, ffff88800f154d58) [ 31.290627] [ 31.290777] The buggy address belongs to the physical page: [ 31.291227] page:0000000092af3ec8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf154 [ 31.291971] memcg:ffff88800f6ea701 [ 31.292264] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.292749] page_type: 0xffffffff() [ 31.293064] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.293695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6ea701 [ 31.294310] page dumped because: kasan: bad access detected [ 31.294776] [ 31.294926] Memory state around the buggy address: [ 31.295309] ffff88800f154c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.295884] ffff88800f154c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.296472] >ffff88800f154d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.297094] ^ [ 31.297406] ffff88800f154d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297980] ffff88800f154e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.298575] ================================================================== [ 31.299397] Disabling lock debugging due to kernel taint [ 33.254387] BUG: Bad rss-counter state mm:00000000f4903912 type:MM_FILEPAGES val:33 [ 33.255092] BUG: Bad rss-counter state mm:00000000f4903912 type:MM_ANONPAGES val:22 [ 33.621098] BUG: Bad rss-counter state mm:00000000a5e23d68 type:MM_FILEPAGES val:33 [ 33.621794] BUG: Bad rss-counter state mm:00000000a5e23d68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28410' (ECDSA) to the list of known hosts. 2023/06/21 08:34:27 fuzzer started 2023/06/21 08:34:27 dialing manager at localhost:36067 2023/06/21 08:34:27 checking machine... 2023/06/21 08:34:27 checking revisions... [ 34.205809] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:34:27 testing simple program... [ 34.248883] cgroup: Unknown subsys name 'net' [ 34.296234] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:34:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09a98 RCX=ffffffff8608a556 RDX=1ffff1100d9c1353 RSI=ffff88806ce09b38 RDI=ffff88806ce09a98 RBP=ffff88806ce09b38 RSP=ffff88806ce099a0 R8 =ffffffff8608a55a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff8113041c 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 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=00007ffed6d17708 CR3=000000001a07c000 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=2037323a34333a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff82243988 RSP=ffff888015b9fcb0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff854145c0 R13=0000000000000001 R14=000000000003fd30 R15=0000000000000002 RIP=ffffffff815342e3 RFL=00000047 [---Z-PC] 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 00007f80efd0b900 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=00007f80f02c30b0 CR3=000000001a13c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000