syzkaller login: [ 33.072638] BUG: Bad rss-counter state mm:00000000fe37318c type:MM_FILEPAGES val:33 [ 33.074086] BUG: Bad rss-counter state mm:00000000fe37318c type:MM_ANONPAGES val:22 [ 33.217965] ================================================================== [ 33.219067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.220176] Read of size 8 at addr ffff888019220798 by task sshd/219 [ 33.221195] [ 33.221414] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.222293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.223287] Call Trace: [ 33.223609] [ 33.223895] dump_stack_lvl+0x91/0xf0 [ 33.224384] print_report+0xcc/0x620 [ 33.224880] ? __virt_addr_valid+0x102/0x340 [ 33.225440] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.226071] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.226688] kasan_report+0xbe/0xf0 [ 33.227169] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.227796] vma_interval_tree_remove+0xc75/0xec0 [ 33.228402] vma_prepare+0xc54/0x11a0 [ 33.228885] __split_vma+0x5af/0x950 [ 33.229359] ? __pfx___split_vma+0x10/0x10 [ 33.229916] ? find_held_lock+0x2c/0x110 [ 33.230440] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.231004] ? lock_is_held_type+0x9f/0x120 [ 33.231546] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.232164] ? mtree_range_walk+0x632/0x900 [ 33.232719] ? mas_walk+0x5c7/0x7c0 [ 33.233193] do_vmi_munmap+0x1f1/0x2b0 [ 33.233700] mmap_region+0x1f9/0x2660 [ 33.234187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.234696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.235418] ? __pfx_lock_acquire+0x10/0x10 [ 33.235949] ? __pfx_mmap_region+0x10/0x10 [ 33.236483] ? security_mmap_addr+0x7d/0xa0 [ 33.237014] ? get_unmapped_area+0x1f5/0x3f0 [ 33.237564] do_mmap+0x854/0xf00 [ 33.238025] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.238520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.239090] ksys_mmap_pgoff+0x3af/0x500 [ 33.239609] do_syscall_64+0x3f/0x90 [ 33.240084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.240732] RIP: 0033:0x7ff394ebed82 [ 33.241193] 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 [ 33.243339] RSP: 002b:00007ffec431d418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.244256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff394ebed82 [ 33.245114] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3942f8000 [ 33.245968] RBP: 00007ff3942f8000 R08: 0000000000000009 R09: 0000000000001000 [ 33.246819] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dab0792980 [ 33.247667] R13: 00007ffec431d430 R14: 00007ffec431d460 R15: 00007ffec431d7c0 [ 33.248523] [ 33.248814] [ 33.249037] Allocated by task 212: [ 33.249468] kasan_save_stack+0x22/0x50 [ 33.249989] kasan_set_track+0x25/0x30 [ 33.250483] __kasan_slab_alloc+0x59/0x70 [ 33.251005] kmem_cache_alloc+0x16b/0x370 [ 33.251521] vm_area_dup+0x20/0x160 [ 33.251984] __split_vma+0x170/0x950 [ 33.252454] split_vma+0xc6/0x110 [ 33.252897] mprotect_fixup+0x8d2/0xb30 [ 33.253399] do_mprotect_pkey+0x87e/0xd40 [ 33.253925] __x64_sys_mprotect+0x78/0xc0 [ 33.254447] do_syscall_64+0x3f/0x90 [ 33.254918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.255558] [ 33.255773] Freed by task 212: [ 33.256167] kasan_save_stack+0x22/0x50 [ 33.256668] kasan_set_track+0x25/0x30 [ 33.257159] kasan_save_free_info+0x2b/0x50 [ 33.257709] __kasan_slab_free+0x10a/0x190 [ 33.258244] kmem_cache_free+0x10d/0x4d0 [ 33.258756] rcu_core+0x8c8/0x2860 [ 33.259203] __do_softirq+0x1b7/0x7d4 [ 33.259677] [ 33.259892] Last potentially related work creation: [ 33.260482] kasan_save_stack+0x22/0x50 [ 33.260986] __kasan_record_aux_stack+0x8e/0xa0 [ 33.261589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.262298] remove_vma+0x139/0x170 [ 33.262752] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.263330] do_vmi_munmap+0x1f1/0x2b0 [ 33.263823] __vm_munmap+0x138/0x3a0 [ 33.264294] __x64_sys_munmap+0x59/0x80 [ 33.264797] do_syscall_64+0x3f/0x90 [ 33.265277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.265947] [ 33.266168] The buggy address belongs to the object at ffff888019220740 [ 33.266168] which belongs to the cache vm_area_struct of size 168 [ 33.267678] The buggy address is located 88 bytes inside of [ 33.267678] freed 168-byte region [ffff888019220740, ffff8880192207e8) [ 33.269120] [ 33.269345] The buggy address belongs to the physical page: [ 33.270031] page:0000000052ab8fe9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19220 [ 33.271155] memcg:ffff88800f0ef201 [ 33.271586] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.272243] page_type: 0xffffffff() [ 33.272692] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.273605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0ef201 [ 33.274526] page dumped because: kasan: bad access detected [ 33.275184] [ 33.275398] Memory state around the buggy address: [ 33.275983] ffff888019220680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.276836] ffff888019220700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.277689] >ffff888019220780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.278539] ^ [ 33.279032] ffff888019220800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.279894] ffff888019220880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.280756] ================================================================== [ 33.281701] Disabling lock debugging due to kernel taint [ 36.138130] BUG: Bad rss-counter state mm:00000000cc0ebfbe type:MM_FILEPAGES val:33 [ 36.139298] BUG: Bad rss-counter state mm:00000000cc0ebfbe type:MM_ANONPAGES val:22 [ 36.642548] BUG: Bad rss-counter state mm:00000000d7fd2cee type:MM_FILEPAGES val:33 [ 36.643545] BUG: Bad rss-counter state mm:00000000d7fd2cee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22707' (ECDSA) to the list of known hosts. 2023/06/19 12:19:04 fuzzer started 2023/06/19 12:19:05 dialing manager at localhost:44161 2023/06/19 12:19:05 checking machine... 2023/06/19 12:19:05 checking revisions... [ 37.382416] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:19:05 testing simple program... [ 37.430913] cgroup: Unknown subsys name 'net' [ 37.471286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:19:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffef2734ae8 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=00007f142ede551000005557caf2d790 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=ffffffff8450b05e RCX=ffffffff8609fb01 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff8450b05e RBP=ffffffff8450b05e RSP=ffff88806cf09a48 R8 =ffffffff8609fb08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=0000000000000001 R13=0000000000000000 R14=ffff888015980000 R15=ffff88800942f900 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007fdc91b30700 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=00007ffa8551d540 CR3=000000000e2ce000 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=2034303a39313a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a39313a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000