syzkaller login: [ 30.981051] BUG: Bad rss-counter state mm:0000000099682d54 type:MM_FILEPAGES val:33 [ 30.982320] BUG: Bad rss-counter state mm:0000000099682d54 type:MM_ANONPAGES val:22 [ 31.146060] ================================================================== [ 31.147133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.148169] Read of size 8 at addr ffff88801bc2aa50 by task sshd/223 [ 31.149048] [ 31.149264] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.150146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.151162] Call Trace: [ 31.151509] [ 31.151792] dump_stack_lvl+0x91/0xf0 [ 31.152284] print_report+0xcc/0x620 [ 31.152762] ? __virt_addr_valid+0x102/0x340 [ 31.153321] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.153939] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.154559] kasan_report+0xbe/0xf0 [ 31.155037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.155702] vma_interval_tree_remove+0xc75/0xec0 [ 31.156306] vma_prepare+0xc54/0x11a0 [ 31.156789] __split_vma+0x5af/0x950 [ 31.157260] ? __pfx___split_vma+0x10/0x10 [ 31.157783] ? find_held_lock+0x2c/0x110 [ 31.158305] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.158870] ? lock_is_held_type+0x9f/0x120 [ 31.159449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.160066] ? mtree_range_walk+0x632/0x900 [ 31.160616] ? mas_walk+0x5c7/0x7c0 [ 31.161099] do_vmi_munmap+0x1f1/0x2b0 [ 31.161593] mmap_region+0x1f9/0x2660 [ 31.162085] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.162590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.163324] ? __pfx_lock_acquire+0x10/0x10 [ 31.163861] ? __pfx_mmap_region+0x10/0x10 [ 31.164390] ? security_mmap_addr+0x7d/0xa0 [ 31.164929] ? get_unmapped_area+0x1f5/0x3f0 [ 31.165478] do_mmap+0x854/0xf00 [ 31.165918] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.166412] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.166974] ksys_mmap_pgoff+0x3af/0x500 [ 31.167511] do_syscall_64+0x3f/0x90 [ 31.167987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168634] RIP: 0033:0x7fac61433d82 [ 31.169093] 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 [ 31.171189] RSP: 002b:00007ffd781aaac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.172120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac61433d82 [ 31.172967] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac6086d000 [ 31.173806] RBP: 00007fac6086d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.174647] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a95d78fec0 [ 31.175526] R13: 00007ffd781aaae0 R14: 00007ffd781aab10 R15: 00007ffd781aae70 [ 31.176378] [ 31.176670] [ 31.176885] Allocated by task 216: [ 31.177314] kasan_save_stack+0x22/0x50 [ 31.177821] kasan_set_track+0x25/0x30 [ 31.178318] __kasan_slab_alloc+0x59/0x70 [ 31.178843] kmem_cache_alloc+0x16b/0x370 [ 31.179401] vm_area_dup+0x20/0x160 [ 31.179865] __split_vma+0x170/0x950 [ 31.180330] split_vma+0xc6/0x110 [ 31.180774] mprotect_fixup+0x8d2/0xb30 [ 31.181277] do_mprotect_pkey+0x87e/0xd40 [ 31.181805] __x64_sys_mprotect+0x78/0xc0 [ 31.182326] do_syscall_64+0x3f/0x90 [ 31.182802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183494] [ 31.183712] Freed by task 216: [ 31.184099] kasan_save_stack+0x22/0x50 [ 31.184598] kasan_set_track+0x25/0x30 [ 31.185087] kasan_save_free_info+0x2b/0x50 [ 31.185614] __kasan_slab_free+0x10a/0x190 [ 31.186140] kmem_cache_free+0x10d/0x4d0 [ 31.186648] rcu_core+0x8c8/0x2860 [ 31.187090] __do_softirq+0x1b7/0x7d4 [ 31.187601] [ 31.187818] Last potentially related work creation: [ 31.188398] kasan_save_stack+0x22/0x50 [ 31.188898] __kasan_record_aux_stack+0x8e/0xa0 [ 31.189472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.190113] remove_vma+0x139/0x170 [ 31.190566] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.191129] do_vmi_munmap+0x1f1/0x2b0 [ 31.191640] __vm_munmap+0x138/0x3a0 [ 31.192106] __x64_sys_munmap+0x59/0x80 [ 31.192598] do_syscall_64+0x3f/0x90 [ 31.193072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193706] [ 31.193923] The buggy address belongs to the object at ffff88801bc2a9f8 [ 31.193923] which belongs to the cache vm_area_struct of size 168 [ 31.195418] The buggy address is located 88 bytes inside of [ 31.195418] freed 168-byte region [ffff88801bc2a9f8, ffff88801bc2aaa0) [ 31.196808] [ 31.197022] The buggy address belongs to the physical page: [ 31.197671] page:000000009711bb35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc2a [ 31.198748] memcg:ffff88801a2fa201 [ 31.199176] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.199848] page_type: 0xffffffff() [ 31.200304] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.201223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2fa201 [ 31.202131] page dumped because: kasan: bad access detected [ 31.202790] [ 31.203005] Memory state around the buggy address: [ 31.203616] ffff88801bc2a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.204470] ffff88801bc2a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.205333] >ffff88801bc2aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.206182] ^ [ 31.206880] ffff88801bc2aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.207756] ffff88801bc2ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.208609] ================================================================== [ 31.209626] Disabling lock debugging due to kernel taint [ 33.811594] BUG: Bad rss-counter state mm:00000000a703a405 type:MM_FILEPAGES val:33 [ 33.812759] BUG: Bad rss-counter state mm:00000000a703a405 type:MM_ANONPAGES val:22 [ 34.294162] BUG: Bad rss-counter state mm:0000000063530688 type:MM_FILEPAGES val:33 [ 34.295372] BUG: Bad rss-counter state mm:0000000063530688 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23936' (ECDSA) to the list of known hosts. 2023/06/20 14:45:10 fuzzer started 2023/06/20 14:45:10 dialing manager at localhost:36067 2023/06/20 14:45:10 checking machine... 2023/06/20 14:45:10 checking revisions... [ 34.936407] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:45:10 testing simple program... [ 34.990550] cgroup: Unknown subsys name 'net' [ 35.028361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffccde89698 CR3=0000000005482000 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=00007fc64c53e510000055754a967790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f17fb18 RCX=0000000000000000 RDX=1ffff11001e2ff55 RSI=0000000000000000 RDI=ffff88800f17faf0 RBP=ffff888018d19b40 RSP=ffff88800f17fa30 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88800f17fa80 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800f17faa8 R14=ffff888018d19b40 R15=ffff88800f17fa80 RIP=ffffffff81132ac4 RFL=00000202 [-------] 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 00007fb50ac41900 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=00007fb50b1f90b0 CR3=000000000cabe000 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