syzkaller login: [ 30.629281] BUG: Bad rss-counter state mm:000000002129a996 type:MM_FILEPAGES val:33 [ 30.630474] BUG: Bad rss-counter state mm:000000002129a996 type:MM_ANONPAGES val:22 [ 30.775457] ================================================================== [ 30.776377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.777297] Read of size 8 at addr ffff8880165f1798 by task sshd/221 [ 30.778056] [ 30.778294] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.779202] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.780170] Call Trace: [ 30.780485] [ 30.780779] dump_stack_lvl+0x91/0xf0 [ 30.781265] print_report+0xcc/0x620 [ 30.781744] ? __virt_addr_valid+0x102/0x340 [ 30.782315] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782925] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783541] kasan_report+0xbe/0xf0 [ 30.784014] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784629] vma_interval_tree_remove+0xc75/0xec0 [ 30.785229] vma_prepare+0xc54/0x11a0 [ 30.785707] __split_vma+0x5af/0x950 [ 30.786209] ? __pfx___split_vma+0x10/0x10 [ 30.786736] ? find_held_lock+0x2c/0x110 [ 30.787264] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787817] ? lock_is_held_type+0x9f/0x120 [ 30.788355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788957] ? mtree_range_walk+0x632/0x900 [ 30.789505] ? mas_walk+0x5c7/0x7c0 [ 30.789973] do_vmi_munmap+0x1f1/0x2b0 [ 30.790477] mmap_region+0x1f9/0x2660 [ 30.790958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791461] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.792160] ? __pfx_lock_acquire+0x10/0x10 [ 30.792689] ? __pfx_mmap_region+0x10/0x10 [ 30.793213] ? security_mmap_addr+0x7d/0xa0 [ 30.793740] ? get_unmapped_area+0x1f5/0x3f0 [ 30.794316] do_mmap+0x854/0xf00 [ 30.794755] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.795262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.795825] ksys_mmap_pgoff+0x3af/0x500 [ 30.796336] do_syscall_64+0x3f/0x90 [ 30.796813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797451] RIP: 0033:0x7fdf52badd82 [ 30.797913] 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 [ 30.800018] RSP: 002b:00007fff9a9ac6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.800907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf52badd82 [ 30.801751] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf51fe7000 [ 30.802599] RBP: 00007fdf51fe7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.803440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557749f49ec0 [ 30.804284] R13: 00007fff9a9ac6c0 R14: 00007fff9a9ac6f0 R15: 00007fff9a9aca50 [ 30.805139] [ 30.805427] [ 30.805647] Allocated by task 214: [ 30.806075] kasan_save_stack+0x22/0x50 [ 30.806601] kasan_set_track+0x25/0x30 [ 30.807095] __kasan_slab_alloc+0x59/0x70 [ 30.807617] kmem_cache_alloc+0x16b/0x370 [ 30.808137] vm_area_dup+0x20/0x160 [ 30.808590] __split_vma+0x170/0x950 [ 30.809054] split_vma+0xc6/0x110 [ 30.809501] mprotect_fixup+0x8d2/0xb30 [ 30.810001] do_mprotect_pkey+0x87e/0xd40 [ 30.810528] __x64_sys_mprotect+0x78/0xc0 [ 30.811055] do_syscall_64+0x3f/0x90 [ 30.811541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812182] [ 30.812401] Freed by task 214: [ 30.812789] kasan_save_stack+0x22/0x50 [ 30.813289] kasan_set_track+0x25/0x30 [ 30.813776] kasan_save_free_info+0x2b/0x50 [ 30.814311] __kasan_slab_free+0x10a/0x190 [ 30.814843] kmem_cache_free+0x10d/0x4d0 [ 30.815352] rcu_core+0x8c8/0x2860 [ 30.815792] __do_softirq+0x1b7/0x7d4 [ 30.816271] [ 30.816486] Last potentially related work creation: [ 30.817069] kasan_save_stack+0x22/0x50 [ 30.817572] __kasan_record_aux_stack+0x8e/0xa0 [ 30.818164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.818807] remove_vma+0x139/0x170 [ 30.819256] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.819814] do_vmi_munmap+0x1f1/0x2b0 [ 30.820328] __vm_munmap+0x138/0x3a0 [ 30.820791] __x64_sys_munmap+0x59/0x80 [ 30.821298] do_syscall_64+0x3f/0x90 [ 30.821770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822419] [ 30.822632] The buggy address belongs to the object at ffff8880165f1740 [ 30.822632] which belongs to the cache vm_area_struct of size 168 [ 30.824098] The buggy address is located 88 bytes inside of [ 30.824098] freed 168-byte region [ffff8880165f1740, ffff8880165f17e8) [ 30.825484] [ 30.825702] The buggy address belongs to the physical page: [ 30.826362] page:00000000d8ebfaaa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165f1 [ 30.827494] memcg:ffff88800e31ff01 [ 30.827917] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.828611] page_type: 0xffffffff() [ 30.829059] raw: 0100000000000200 ffff8880087a0c80 ffffea000037bcc0 dead000000000005 [ 30.829974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e31ff01 [ 30.830894] page dumped because: kasan: bad access detected [ 30.831551] [ 30.831766] Memory state around the buggy address: [ 30.832344] ffff8880165f1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.833199] ffff8880165f1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.834058] >ffff8880165f1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.834914] ^ [ 30.835402] ffff8880165f1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.836253] ffff8880165f1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.837091] ================================================================== [ 30.838065] Disabling lock debugging due to kernel taint [ 32.431256] BUG: Bad rss-counter state mm:00000000a0c65664 type:MM_FILEPAGES val:33 [ 32.432570] BUG: Bad rss-counter state mm:00000000a0c65664 type:MM_ANONPAGES val:22 [ 32.921028] BUG: Bad rss-counter state mm:00000000e57470f5 type:MM_FILEPAGES val:33 [ 32.922368] BUG: Bad rss-counter state mm:00000000e57470f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26913' (ECDSA) to the list of known hosts. 2023/06/21 05:33:45 fuzzer started 2023/06/21 05:33:46 dialing manager at localhost:36067 2023/06/21 05:33:46 checking machine... 2023/06/21 05:33:46 checking revisions... [ 33.644220] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:33:46 testing simple program... [ 33.693744] cgroup: Unknown subsys name 'net' [ 33.757663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:33:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=0000000000000006 RBP=ffff88801431fd28 RSP=ffff88801431fc60 R8 =0000000000000006 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=00000000c000003e R13=ffff88801431fd60 R14=00000000c000003e R15=ffffc9000064e078 RIP=ffffffff815a29e5 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 00007f67aff56900 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=00007fb6203d5650 CR3=000000000c412000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dbce575c491cea9c00000000000ae988 XMM05=b8aa108ab0b648f10000000000132440 XMM06=c291bd5c70af25b90000000000131230 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe1e93b328 CR3=000000000c6c6000 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=2035343a33333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a33333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000