syzkaller login: [ 31.038847] BUG: Bad rss-counter state mm:00000000283b94de type:MM_FILEPAGES val:33 [ 31.039869] BUG: Bad rss-counter state mm:00000000283b94de type:MM_ANONPAGES val:22 [ 31.209154] ================================================================== [ 31.210084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.211047] Read of size 8 at addr ffff8880169c2b38 by task sshd/219 [ 31.211819] [ 31.212042] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.213049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.214065] Call Trace: [ 31.214394] [ 31.214685] dump_stack_lvl+0x91/0xf0 [ 31.215199] print_report+0xcc/0x620 [ 31.215698] ? __virt_addr_valid+0x102/0x340 [ 31.216272] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216909] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217555] kasan_report+0xbe/0xf0 [ 31.218047] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.218673] vma_interval_tree_remove+0xc75/0xec0 [ 31.219286] vma_prepare+0xc54/0x11a0 [ 31.219770] __split_vma+0x5af/0x950 [ 31.220246] ? __pfx___split_vma+0x10/0x10 [ 31.220786] ? find_held_lock+0x2c/0x110 [ 31.221321] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.221895] ? lock_is_held_type+0x9f/0x120 [ 31.222439] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.223052] ? mtree_range_walk+0x632/0x900 [ 31.223602] ? mas_walk+0x5c7/0x7c0 [ 31.224078] do_vmi_munmap+0x1f1/0x2b0 [ 31.224574] mmap_region+0x1f9/0x2660 [ 31.225062] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.225576] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.226291] ? __pfx_lock_acquire+0x10/0x10 [ 31.226826] ? __pfx_mmap_region+0x10/0x10 [ 31.227374] ? security_mmap_addr+0x7d/0xa0 [ 31.227931] ? get_unmapped_area+0x1f5/0x3f0 [ 31.228489] do_mmap+0x854/0xf00 [ 31.228936] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.229470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.230046] ksys_mmap_pgoff+0x3af/0x500 [ 31.230566] do_syscall_64+0x3f/0x90 [ 31.231051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231704] RIP: 0033:0x7fca67a37d82 [ 31.232167] 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 [ 31.234360] RSP: 002b:00007fff3f724cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.235277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca67a37d82 [ 31.236127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca66e71000 [ 31.236973] RBP: 00007fca66e71000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237838] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac61ac8ec0 [ 31.238694] R13: 00007fff3f724d10 R14: 00007fff3f724d40 R15: 00007fff3f7250a0 [ 31.239566] [ 31.239859] [ 31.240076] Allocated by task 212: [ 31.240515] kasan_save_stack+0x22/0x50 [ 31.241041] kasan_set_track+0x25/0x30 [ 31.241551] __kasan_slab_alloc+0x59/0x70 [ 31.242088] kmem_cache_alloc+0x16b/0x370 [ 31.242623] vm_area_dup+0x20/0x160 [ 31.243084] __split_vma+0x170/0x950 [ 31.243571] split_vma+0xc6/0x110 [ 31.244031] mprotect_fixup+0x8d2/0xb30 [ 31.244547] do_mprotect_pkey+0x87e/0xd40 [ 31.245078] __x64_sys_mprotect+0x78/0xc0 [ 31.245608] do_syscall_64+0x3f/0x90 [ 31.246093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246760] [ 31.246976] Freed by task 13: [ 31.247367] kasan_save_stack+0x22/0x50 [ 31.247888] kasan_set_track+0x25/0x30 [ 31.248407] kasan_save_free_info+0x2b/0x50 [ 31.248945] __kasan_slab_free+0x10a/0x190 [ 31.249522] kmem_cache_free+0x10d/0x4d0 [ 31.250047] rcu_core+0x8c8/0x2860 [ 31.250503] __do_softirq+0x1b7/0x7d4 [ 31.251001] [ 31.251224] Last potentially related work creation: [ 31.251836] kasan_save_stack+0x22/0x50 [ 31.252353] __kasan_record_aux_stack+0x8e/0xa0 [ 31.252932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.253599] remove_vma+0x139/0x170 [ 31.254067] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254637] do_vmi_munmap+0x1f1/0x2b0 [ 31.255121] __vm_munmap+0x138/0x3a0 [ 31.255589] __x64_sys_munmap+0x59/0x80 [ 31.256090] do_syscall_64+0x3f/0x90 [ 31.256579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257235] [ 31.257452] The buggy address belongs to the object at ffff8880169c2ae0 [ 31.257452] which belongs to the cache vm_area_struct of size 168 [ 31.258939] The buggy address is located 88 bytes inside of [ 31.258939] freed 168-byte region [ffff8880169c2ae0, ffff8880169c2b88) [ 31.260341] [ 31.260557] The buggy address belongs to the physical page: [ 31.261232] page:000000008bdc5e8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169c2 [ 31.262337] memcg:ffff888015d93301 [ 31.262767] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.263423] page_type: 0xffffffff() [ 31.263882] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.264803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d93301 [ 31.265723] page dumped because: kasan: bad access detected [ 31.266382] [ 31.266601] Memory state around the buggy address: [ 31.267178] ffff8880169c2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.268036] ffff8880169c2a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.268887] >ffff8880169c2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.269744] ^ [ 31.270353] ffff8880169c2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.271210] ffff8880169c2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.272058] ================================================================== [ 31.273355] Disabling lock debugging due to kernel taint [ 33.669082] BUG: Bad rss-counter state mm:000000002a308efb type:MM_FILEPAGES val:33 [ 33.670054] BUG: Bad rss-counter state mm:000000002a308efb type:MM_ANONPAGES val:22 [ 34.152670] BUG: Bad rss-counter state mm:0000000094342577 type:MM_FILEPAGES val:33 [ 34.153844] BUG: Bad rss-counter state mm:0000000094342577 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42064' (ECDSA) to the list of known hosts. 2023/06/21 01:46:25 fuzzer started 2023/06/21 01:46:25 dialing manager at localhost:36067 2023/06/21 01:46:25 checking machine... 2023/06/21 01:46:25 checking revisions... [ 34.769215] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:46:25 testing simple program... [ 34.817860] cgroup: Unknown subsys name 'net' [ 34.869463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:46:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11003436ee6 RCX=ffffffff85d3e490 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801a1b7720 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f3d 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 00007f7f4150a900 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=00007f7f41abf650 CR3=000000000ec3e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10011c1a3b RBX=ffffed10011c1a3c RCX=ffffffff8121b11b RDX=ffffed10011c1a3c RSI=0000000000000004 RDI=ffff888008e0d1d8 RBP=ffffed10011c1a3b RSP=ffff888008e37eb0 R8 =0000000000000001 R9 =ffffed10011c1a3b R10=ffff888008e0d1db R11=0000000000000128 R12=ffffffff854e8ec0 R13=ffff888008e0d1c0 R14=ffff888008e0d1c0 R15=0000000000000001 RIP=ffffffff8180f189 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=00007f539f9233a0 CR3=000000000ca4a000 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=78ca09e815ef09ae70403b94336f9586 XMM02=eff9b2d0a8fce9cb000000000011d3e8 XMM03=2c67c8bc2e329bc3000000000011d510 XMM04=d4926da5a7b2ebb900000000000ae988 XMM05=b000eb26ce6a6e530000000000132b68 XMM06=4fda316b135da52b0000000000131958 XMM07=fb795ef6d65770560000000000121bf8 XMM08=2c67c8bc2e329bc3000000000011d510 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000