syzkaller login: [ 31.430936] BUG: Bad rss-counter state mm:00000000b6ac7811 type:MM_FILEPAGES val:33 [ 31.431711] BUG: Bad rss-counter state mm:00000000b6ac7811 type:MM_ANONPAGES val:22 [ 31.460670] ================================================================== [ 31.461451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.462078] Read of size 8 at addr ffff88800f0b3a50 by task sshd/222 [ 31.462625] [ 31.462776] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.463365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.464036] Call Trace: [ 31.464261] [ 31.464447] dump_stack_lvl+0x91/0xf0 [ 31.464777] print_report+0xcc/0x620 [ 31.465097] ? __virt_addr_valid+0x102/0x340 [ 31.465454] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.465843] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.466227] kasan_report+0xbe/0xf0 [ 31.466601] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.467018] vma_interval_tree_remove+0xc75/0xec0 [ 31.467421] vma_prepare+0xc54/0x11a0 [ 31.467740] __split_vma+0x5af/0x950 [ 31.468067] ? __pfx___split_vma+0x10/0x10 [ 31.468424] ? find_held_lock+0x2c/0x110 [ 31.468782] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.469157] ? lock_is_held_type+0x9f/0x120 [ 31.469516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.469921] ? mtree_range_walk+0x632/0x900 [ 31.470283] ? mas_walk+0x5c7/0x7c0 [ 31.470631] do_vmi_munmap+0x1f1/0x2b0 [ 31.470951] mmap_region+0x1f9/0x2660 [ 31.471270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.471615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.472113] ? __pfx_lock_acquire+0x10/0x10 [ 31.472477] ? __pfx_mmap_region+0x10/0x10 [ 31.472838] ? security_mmap_addr+0x7d/0xa0 [ 31.473201] ? get_unmapped_area+0x1f5/0x3f0 [ 31.473818] do_mmap+0x854/0xf00 [ 31.474131] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.474463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.474876] ksys_mmap_pgoff+0x3af/0x500 [ 31.475206] do_syscall_64+0x3f/0x90 [ 31.475525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.475970] RIP: 0033:0x7f8b1351ed82 [ 31.476318] 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 [ 31.477746] RSP: 002b:00007ffc968efc78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.478353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b1351ed82 [ 31.478977] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b12958000 [ 31.479529] RBP: 00007f8b12958000 R08: 0000000000000009 R09: 0000000000001000 [ 31.480105] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606a24f6b20 [ 31.480665] R13: 00007ffc968efc90 R14: 00007ffc968efcc0 R15: 00007ffc968f0020 [ 31.481235] [ 31.481424] [ 31.481568] Allocated by task 215: [ 31.481865] kasan_save_stack+0x22/0x50 [ 31.482233] kasan_set_track+0x25/0x30 [ 31.482607] __kasan_slab_alloc+0x59/0x70 [ 31.482971] kmem_cache_alloc+0x16b/0x370 [ 31.483326] vm_area_dup+0x20/0x160 [ 31.483625] __split_vma+0x170/0x950 [ 31.483981] split_vma+0xc6/0x110 [ 31.484288] mprotect_fixup+0x8d2/0xb30 [ 31.484620] do_mprotect_pkey+0x87e/0xd40 [ 31.484979] __x64_sys_mprotect+0x78/0xc0 [ 31.485336] do_syscall_64+0x3f/0x90 [ 31.485658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.486127] [ 31.486302] Freed by task 215: [ 31.486681] kasan_save_stack+0x22/0x50 [ 31.487021] kasan_set_track+0x25/0x30 [ 31.487359] kasan_save_free_info+0x2b/0x50 [ 31.487722] __kasan_slab_free+0x10a/0x190 [ 31.488097] kmem_cache_free+0x10d/0x4d0 [ 31.488492] rcu_core+0x8c8/0x2860 [ 31.488866] __do_softirq+0x1b7/0x7d4 [ 31.489207] [ 31.489357] Last potentially related work creation: [ 31.489747] kasan_save_stack+0x22/0x50 [ 31.490088] __kasan_record_aux_stack+0x8e/0xa0 [ 31.490477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.490959] remove_vma+0x139/0x170 [ 31.491270] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.491687] do_vmi_munmap+0x1f1/0x2b0 [ 31.492063] __vm_munmap+0x138/0x3a0 [ 31.492370] __x64_sys_munmap+0x59/0x80 [ 31.492696] do_syscall_64+0x3f/0x90 [ 31.493025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.493465] [ 31.493613] The buggy address belongs to the object at ffff88800f0b39f8 [ 31.493613] which belongs to the cache vm_area_struct of size 168 [ 31.494721] The buggy address is located 88 bytes inside of [ 31.494721] freed 168-byte region [ffff88800f0b39f8, ffff88800f0b3aa0) [ 31.495697] [ 31.495844] The buggy address belongs to the physical page: [ 31.496285] page:000000009150b751 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0b3 [ 31.497022] memcg:ffff888019bb3901 [ 31.497357] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.497857] page_type: 0xffffffff() [ 31.498154] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.498807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bb3901 [ 31.499411] page dumped because: kasan: bad access detected [ 31.499869] [ 31.500019] Memory state around the buggy address: [ 31.500442] ffff88800f0b3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.501010] ffff88800f0b3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.501580] >ffff88800f0b3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.502185] ^ [ 31.502703] ffff88800f0b3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.503282] ffff88800f0b3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.503857] ================================================================== [ 31.504622] Disabling lock debugging due to kernel taint [ 33.442704] BUG: Bad rss-counter state mm:00000000d3eafce4 type:MM_FILEPAGES val:33 [ 33.443412] BUG: Bad rss-counter state mm:00000000d3eafce4 type:MM_ANONPAGES val:22 [ 33.898980] BUG: Bad rss-counter state mm:000000000e7b2b45 type:MM_FILEPAGES val:33 [ 33.899679] BUG: Bad rss-counter state mm:000000000e7b2b45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23141' (ECDSA) to the list of known hosts. 2023/06/21 09:01:31 fuzzer started 2023/06/21 09:01:31 dialing manager at localhost:36067 2023/06/21 09:01:31 checking machine... 2023/06/21 09:01:31 checking revisions... [ 34.450109] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:01:32 testing simple program... [ 34.483729] cgroup: Unknown subsys name 'net' [ 34.519337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:01:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613961e RDX=1ffff110011b3f33 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d9f9a8 RSP=ffff888008d9f8e0 R8 =ffffffff86139622 R9 =ffff888008d9f990 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888008d9f9b0 R13=ffff888008d9f998 R14=0000000000000005 R15=ffff888008d9f950 RIP=ffffffff81130b54 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 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=00007fcd717e2618 CR3=000000001c916000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=0000000000000001 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880161ffbd8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000005 R14=0000000000000180 R15=0000000000000000 RIP=ffffffff8180f09a RFL=00000086 [--S--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 00007fcd7122b900 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=00007ffc0e4ad000 CR3=000000001c916000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000