syzkaller login: [ 28.727070] BUG: Bad rss-counter state mm:00000000d20de865 type:MM_FILEPAGES val:33 [ 28.728554] BUG: Bad rss-counter state mm:00000000d20de865 type:MM_ANONPAGES val:22 [ 28.869301] ================================================================== [ 28.870259] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.871248] Read of size 8 at addr ffff888018f255c8 by task sshd/221 [ 28.872056] [ 28.872273] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.873302] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.874333] Call Trace: [ 28.874676] [ 28.874968] dump_stack_lvl+0x91/0xf0 [ 28.875476] print_report+0xcc/0x620 [ 28.875973] ? __virt_addr_valid+0x102/0x340 [ 28.876536] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877181] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877902] kasan_report+0xbe/0xf0 [ 28.878373] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.879009] vma_interval_tree_remove+0xc75/0xec0 [ 28.879618] vma_prepare+0xc54/0x11a0 [ 28.880296] __split_vma+0x5af/0x950 [ 28.880883] ? __pfx___split_vma+0x10/0x10 [ 28.881407] ? find_held_lock+0x2c/0x110 [ 28.881921] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.882465] ? lock_is_held_type+0x9f/0x120 [ 28.883056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.883689] ? mtree_range_walk+0x632/0x900 [ 28.884253] ? mas_walk+0x5c7/0x7c0 [ 28.884746] do_vmi_munmap+0x1f1/0x2b0 [ 28.885263] mmap_region+0x1f9/0x2660 [ 28.885764] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.886268] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.887010] ? __pfx_lock_acquire+0x10/0x10 [ 28.887568] ? __pfx_mmap_region+0x10/0x10 [ 28.888127] ? security_mmap_addr+0x7d/0xa0 [ 28.888678] ? get_unmapped_area+0x1f5/0x3f0 [ 28.889245] do_mmap+0x854/0xf00 [ 28.889708] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.890208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.890784] ksys_mmap_pgoff+0x3af/0x500 [ 28.891298] do_syscall_64+0x3f/0x90 [ 28.891813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.892469] RIP: 0033:0x7fad97210d82 [ 28.892952] 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 [ 28.895155] RSP: 002b:00007ffcd357a608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.896115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad97210d82 [ 28.897009] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad9664a000 [ 28.897947] RBP: 00007fad9664a000 R08: 0000000000000009 R09: 0000000000001000 [ 28.898850] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623cf01cb20 [ 28.899764] R13: 00007ffcd357a620 R14: 00007ffcd357a650 R15: 00007ffcd357a9b0 [ 28.900688] [ 28.900984] [ 28.901267] Allocated by task 214: [ 28.901746] kasan_save_stack+0x22/0x50 [ 28.902285] kasan_set_track+0x25/0x30 [ 28.902801] __kasan_slab_alloc+0x59/0x70 [ 28.903355] kmem_cache_alloc+0x16b/0x370 [ 28.903895] vm_area_dup+0x20/0x160 [ 28.904386] __split_vma+0x170/0x950 [ 28.904906] split_vma+0xc6/0x110 [ 28.905410] mprotect_fixup+0x8d2/0xb30 [ 28.905956] do_mprotect_pkey+0x87e/0xd40 [ 28.906509] __x64_sys_mprotect+0x78/0xc0 [ 28.907094] do_syscall_64+0x3f/0x90 [ 28.907606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.908283] [ 28.908501] Freed by task 214: [ 28.908944] kasan_save_stack+0x22/0x50 [ 28.909517] kasan_set_track+0x25/0x30 [ 28.910081] kasan_save_free_info+0x2b/0x50 [ 28.910657] __kasan_slab_free+0x10a/0x190 [ 28.911223] kmem_cache_free+0x10d/0x4d0 [ 28.911765] rcu_core+0x8c8/0x2860 [ 28.912245] __do_softirq+0x1b7/0x7d4 [ 28.912771] [ 28.912983] Last potentially related work creation: [ 28.913811] kasan_save_stack+0x22/0x50 [ 28.914333] __kasan_record_aux_stack+0x8e/0xa0 [ 28.914893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.915544] remove_vma+0x139/0x170 [ 28.915992] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.916559] do_vmi_munmap+0x1f1/0x2b0 [ 28.917050] __vm_munmap+0x138/0x3a0 [ 28.917542] __x64_sys_munmap+0x59/0x80 [ 28.918051] do_syscall_64+0x3f/0x90 [ 28.918533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.919200] [ 28.919423] The buggy address belongs to the object at ffff888018f25570 [ 28.919423] which belongs to the cache vm_area_struct of size 168 [ 28.920901] The buggy address is located 88 bytes inside of [ 28.920901] freed 168-byte region [ffff888018f25570, ffff888018f25618) [ 28.922385] [ 28.922603] The buggy address belongs to the physical page: [ 28.923278] page:000000000d88413a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f25 [ 28.924391] memcg:ffff888009b4a501 [ 28.924826] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.925525] page_type: 0xffffffff() [ 28.925973] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.926914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b4a501 [ 28.927841] page dumped because: kasan: bad access detected [ 28.928522] [ 28.928740] Memory state around the buggy address: [ 28.929371] ffff888018f25480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.930261] ffff888018f25500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.931153] >ffff888018f25580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.932012] ^ [ 28.932695] ffff888018f25600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.933602] ffff888018f25680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.934476] ================================================================== [ 28.935554] Disabling lock debugging due to kernel taint [ 30.935438] BUG: Bad rss-counter state mm:000000004a241c89 type:MM_FILEPAGES val:33 [ 30.936592] BUG: Bad rss-counter state mm:000000004a241c89 type:MM_ANONPAGES val:22 [ 31.324092] BUG: Bad rss-counter state mm:00000000938906aa type:MM_FILEPAGES val:33 [ 31.325345] BUG: Bad rss-counter state mm:00000000938906aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43938' (ECDSA) to the list of known hosts. 2023/06/21 06:08:26 fuzzer started 2023/06/21 06:08:26 dialing manager at localhost:36067 2023/06/21 06:08:26 checking machine... 2023/06/21 06:08:26 checking revisions... [ 32.058670] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:08:26 testing simple program... [ 32.100736] cgroup: Unknown subsys name 'net' [ 32.170107] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:08:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801001e080 RCX=ffffffff815343f6 RDX=1ffff1100d9c747a RSI=0000000000000008 RDI=ffff88806ce3a3d0 RBP=0000000000000200 RSP=ffff88801cdbfd30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea00003c3780 R14=ffff88806ce3a2c0 R15=ffff888019e2d1f0 RIP=ffffffff81370ac4 RFL=00000012 [----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 00007f74a60fc900 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=00007ffe5dac4000 CR3=0000000018c9c000 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=00000000000000000000000000000000 XMM01=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b6d22 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09fe8 R15=ffff88806cf09a98 RIP=ffffffff81131162 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 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=00007f6a280f9560 CR3=000000000e682000 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=2035323a38303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a38303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000