syzkaller login: [ 30.732755] BUG: Bad rss-counter state mm:0000000099fb6221 type:MM_FILEPAGES val:33 [ 30.733924] BUG: Bad rss-counter state mm:0000000099fb6221 type:MM_ANONPAGES val:22 [ 30.775433] ================================================================== [ 30.776339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.777293] Read of size 8 at addr ffff888016158880 by task sshd/220 [ 30.778065] [ 30.778283] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.779143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.780122] Call Trace: [ 30.780440] <TASK> [ 30.780734] dump_stack_lvl+0x91/0xf0 [ 30.781224] print_report+0xcc/0x620 [ 30.781713] ? __virt_addr_valid+0x102/0x340 [ 30.782263] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783495] kasan_report+0xbe/0xf0 [ 30.783970] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784587] vma_interval_tree_remove+0xc75/0xec0 [ 30.785194] vma_prepare+0xc54/0x11a0 [ 30.785673] __split_vma+0x5af/0x950 [ 30.786144] ? __pfx___split_vma+0x10/0x10 [ 30.786668] ? find_held_lock+0x2c/0x110 [ 30.787201] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787769] ? lock_is_held_type+0x9f/0x120 [ 30.788309] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788941] ? mtree_range_walk+0x632/0x900 [ 30.789494] ? mas_walk+0x5c7/0x7c0 [ 30.789971] do_vmi_munmap+0x1f1/0x2b0 [ 30.790465] mmap_region+0x1f9/0x2660 [ 30.790945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791460] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.792175] ? __pfx_lock_acquire+0x10/0x10 [ 30.792714] ? __pfx_mmap_region+0x10/0x10 [ 30.793249] ? security_mmap_addr+0x7d/0xa0 [ 30.793780] ? get_unmapped_area+0x1f5/0x3f0 [ 30.794337] do_mmap+0x854/0xf00 [ 30.794782] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.795285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.795848] ksys_mmap_pgoff+0x3af/0x500 [ 30.796355] do_syscall_64+0x3f/0x90 [ 30.796844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797488] RIP: 0033:0x7f4948cb7d82 [ 30.797949] 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 [ 30.800069] RSP: 002b:00007ffc7a27e4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.800987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4948cb7d82 [ 30.801843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49480f1000 [ 30.802696] RBP: 00007f49480f1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.803542] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c871cb0ec0 [ 30.804392] R13: 00007ffc7a27e4c0 R14: 00007ffc7a27e4f0 R15: 00007ffc7a27e850 [ 30.805262] </TASK> [ 30.805551] [ 30.805774] Allocated by task 213: [ 30.806200] kasan_save_stack+0x22/0x50 [ 30.806710] kasan_set_track+0x25/0x30 [ 30.807206] __kasan_slab_alloc+0x59/0x70 [ 30.807736] kmem_cache_alloc+0x16b/0x370 [ 30.808363] vm_area_dup+0x20/0x160 [ 30.808810] __split_vma+0x170/0x950 [ 30.809264] split_vma+0xc6/0x110 [ 30.809692] mprotect_fixup+0x8d2/0xb30 [ 30.810186] do_mprotect_pkey+0x87e/0xd40 [ 30.810691] __x64_sys_mprotect+0x78/0xc0 [ 30.811205] do_syscall_64+0x3f/0x90 [ 30.811665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812286] [ 30.812496] Freed by task 213: [ 30.812894] kasan_save_stack+0x22/0x50 [ 30.813383] kasan_set_track+0x25/0x30 [ 30.813865] kasan_save_free_info+0x2b/0x50 [ 30.814383] __kasan_slab_free+0x10a/0x190 [ 30.814903] kmem_cache_free+0x10d/0x4d0 [ 30.815398] rcu_core+0x8c8/0x2860 [ 30.815832] __do_softirq+0x1b7/0x7d4 [ 30.816294] [ 30.816557] Last potentially related work creation: [ 30.817134] kasan_save_stack+0x22/0x50 [ 30.817624] __kasan_record_aux_stack+0x8e/0xa0 [ 30.818181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.818806] remove_vma+0x139/0x170 [ 30.819244] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.819787] do_vmi_munmap+0x1f1/0x2b0 [ 30.820257] __vm_munmap+0x138/0x3a0 [ 30.820730] __x64_sys_munmap+0x59/0x80 [ 30.821213] do_syscall_64+0x3f/0x90 [ 30.821675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822298] [ 30.822510] The buggy address belongs to the object at ffff888016158828 [ 30.822510] which belongs to the cache vm_area_struct of size 168 [ 30.823928] The buggy address is located 88 bytes inside of [ 30.823928] freed 168-byte region [ffff888016158828, ffff8880161588d0) [ 30.825309] [ 30.825519] The buggy address belongs to the physical page: [ 30.826166] page:0000000086c045b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16158 [ 30.827230] memcg:ffff88800ef6a701 [ 30.827650] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.828281] page_type: 0xffffffff() [ 30.828735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.829631] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef6a701 [ 30.830509] page dumped because: kasan: bad access detected [ 30.831160] [ 30.831374] Memory state around the buggy address: [ 30.831939] ffff888016158780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.832777] ffff888016158800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.833616] >ffff888016158880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.834445] ^ [ 30.834852] ffff888016158900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.835686] ffff888016158980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.836510] ================================================================== [ 30.837442] Disabling lock debugging due to kernel taint [ 33.164029] BUG: Bad rss-counter state mm:000000006c3188f6 type:MM_FILEPAGES val:33 [ 33.165071] BUG: Bad rss-counter state mm:000000006c3188f6 type:MM_ANONPAGES val:22 [ 33.560709] BUG: Bad rss-counter state mm:00000000bf587007 type:MM_FILEPAGES val:33 [ 33.561484] BUG: Bad rss-counter state mm:00000000bf587007 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42453' (ECDSA) to the list of known hosts. 2023/06/19 14:40:40 fuzzer started 2023/06/19 14:40:41 dialing manager at localhost:44161 2023/06/19 14:40:41 checking machine... 2023/06/19 14:40:41 checking revisions... [ 34.272323] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:40:41 testing simple program... [ 34.315078] cgroup: Unknown subsys name 'net' [ 34.368510] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:40:40 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff8880183bf7f8 RCX=ffff8880183bf7d0 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff8880183bf804 RBP=0000000000000000 RSP=ffff8880183bf710 R8 =0000000000000001 R9 =ffff8880183bf770 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880183bf7f8 R13=0000000000000000 R14=ffff88800da10000 R15=ffff888016363390 RIP=ffffffff813ad4b6 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 00007f95328bd700 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=00007f10ce20c070 CR3=000000000e6ea000 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=2030343a30343a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a30343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f168001 RBX=ffff88800f1674b8 RCX=0000000000000001 RDX=ffff88800f1674c0 RSI=ffff88800f1674a8 RDI=ffff88800f167420 RBP=ffff88800f160000 RSP=ffff88800f167350 R8 =0000000000000001 R9 =ffff88800f167450 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f167470 R13=ffff88800f167458 R14=ffff88800f1674a8 R15=ffff88800f167410 RIP=ffffffff81131cda 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 00007ff8aceff900 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=00007ff8ad4b6618 CR3=000000001ca94000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000