syzkaller login: [ 31.100611] BUG: Bad rss-counter state mm:00000000f582713b type:MM_FILEPAGES val:33 [ 31.101193] BUG: Bad rss-counter state mm:00000000f582713b type:MM_ANONPAGES val:22 [ 31.205387] ================================================================== [ 31.206443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.207554] Read of size 8 at addr ffff888015dd1a50 by task sshd/220 [ 31.208595] [ 31.208855] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.209560] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.210100] Call Trace: [ 31.210279] [ 31.210438] dump_stack_lvl+0x91/0xf0 [ 31.210715] print_report+0xcc/0x620 [ 31.210985] ? __virt_addr_valid+0x102/0x340 [ 31.211293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211635] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211977] kasan_report+0xbe/0xf0 [ 31.212243] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212602] vma_interval_tree_remove+0xc75/0xec0 [ 31.212935] vma_prepare+0xc54/0x11a0 [ 31.213202] __split_vma+0x5af/0x950 [ 31.213464] ? __pfx___split_vma+0x10/0x10 [ 31.213758] ? find_held_lock+0x2c/0x110 [ 31.214048] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.214366] ? lock_is_held_type+0x9f/0x120 [ 31.214683] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.215038] ? mtree_range_walk+0x632/0x900 [ 31.215362] ? mas_walk+0x5c7/0x7c0 [ 31.215637] do_vmi_munmap+0x1f1/0x2b0 [ 31.215929] mmap_region+0x1f9/0x2660 [ 31.216205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.216513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.216912] ? __pfx_lock_acquire+0x10/0x10 [ 31.217208] ? __pfx_mmap_region+0x10/0x10 [ 31.217510] ? security_mmap_addr+0x7d/0xa0 [ 31.217806] ? get_unmapped_area+0x1f5/0x3f0 [ 31.218114] do_mmap+0x854/0xf00 [ 31.218365] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.218640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218951] ksys_mmap_pgoff+0x3af/0x500 [ 31.219234] do_syscall_64+0x3f/0x90 [ 31.219506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219871] RIP: 0033:0x7fcc4033ad82 [ 31.220128] 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 [ 31.221332] RSP: 002b:00007fff9d8630d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.221834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc4033ad82 [ 31.222318] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc3f774000 [ 31.222798] RBP: 00007fcc3f774000 R08: 0000000000000009 R09: 0000000000001000 [ 31.223310] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602accfdf70 [ 31.223812] R13: 00007fff9d8630f0 R14: 00007fff9d863120 R15: 00007fff9d863480 [ 31.224320] [ 31.224493] [ 31.224621] Allocated by task 213: [ 31.224878] kasan_save_stack+0x22/0x50 [ 31.225171] kasan_set_track+0x25/0x30 [ 31.225457] __kasan_slab_alloc+0x59/0x70 [ 31.225764] kmem_cache_alloc+0x16b/0x370 [ 31.226068] vm_area_dup+0x20/0x160 [ 31.226326] __split_vma+0x170/0x950 [ 31.226605] split_vma+0xc6/0x110 [ 31.226859] mprotect_fixup+0x8d2/0xb30 [ 31.227150] do_mprotect_pkey+0x87e/0xd40 [ 31.227455] __x64_sys_mprotect+0x78/0xc0 [ 31.227761] do_syscall_64+0x3f/0x90 [ 31.228040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228430] [ 31.228552] Freed by task 213: [ 31.228783] kasan_save_stack+0x22/0x50 [ 31.229077] kasan_set_track+0x25/0x30 [ 31.229366] kasan_save_free_info+0x2b/0x50 [ 31.229686] __kasan_slab_free+0x10a/0x190 [ 31.230001] kmem_cache_free+0x10d/0x4d0 [ 31.230287] rcu_core+0x8c8/0x2860 [ 31.230543] __do_softirq+0x1b7/0x7d4 [ 31.230823] [ 31.230946] Last potentially related work creation: [ 31.231288] kasan_save_stack+0x22/0x50 [ 31.231581] __kasan_record_aux_stack+0x8e/0xa0 [ 31.231918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.232305] remove_vma+0x139/0x170 [ 31.232566] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.232889] do_vmi_munmap+0x1f1/0x2b0 [ 31.233168] __vm_munmap+0x138/0x3a0 [ 31.233442] __x64_sys_munmap+0x59/0x80 [ 31.233735] do_syscall_64+0x3f/0x90 [ 31.234015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234386] [ 31.234508] The buggy address belongs to the object at ffff888015dd19f8 [ 31.234508] which belongs to the cache vm_area_struct of size 168 [ 31.235365] The buggy address is located 88 bytes inside of [ 31.235365] freed 168-byte region [ffff888015dd19f8, ffff888015dd1aa0) [ 31.236190] [ 31.236324] The buggy address belongs to the physical page: [ 31.236712] page:00000000f1dede76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15dd1 [ 31.237347] memcg:ffff888006a47801 [ 31.237595] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.237979] page_type: 0xffffffff() [ 31.238237] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.238773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006a47801 [ 31.239297] page dumped because: kasan: bad access detected [ 31.239689] [ 31.239813] Memory state around the buggy address: [ 31.240155] ffff888015dd1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.240663] ffff888015dd1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.241170] >ffff888015dd1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.241669] ^ [ 31.242077] ffff888015dd1a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.242581] ffff888015dd1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.243083] ================================================================== [ 31.243610] Disabling lock debugging due to kernel taint [ 33.057855] BUG: Bad rss-counter state mm:0000000046d3ca9f type:MM_FILEPAGES val:33 [ 33.059005] BUG: Bad rss-counter state mm:0000000046d3ca9f type:MM_ANONPAGES val:22 [ 33.549001] BUG: Bad rss-counter state mm:00000000e9de5953 type:MM_FILEPAGES val:33 [ 33.550163] BUG: Bad rss-counter state mm:00000000e9de5953 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40519' (ECDSA) to the list of known hosts. 2023/06/20 01:21:54 fuzzer started 2023/06/20 01:21:54 dialing manager at localhost:44161 2023/06/20 01:21:54 checking machine... 2023/06/20 01:21:54 checking revisions... [ 34.216511] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:21:55 testing simple program... [ 34.258705] cgroup: Unknown subsys name 'net' [ 34.306703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:21:54 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=dffffc0000000000 RSI=000000000000132f RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=0000000000000000 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130754 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 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=00007fff6d966bc8 CR3=0000000016784000 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=2034353a31323a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a31323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801a277c01 RSI=ffff88801a277c80 RDI=ffff88801a277c80 RBP=ffff88801a2775a0 RSP=ffff88801a2774d8 R8 =0000000000000001 R9 =ffff88801a277588 R10=0000000000038001 R11=000000000008a85c R12=ffff88801a2775a8 R13=ffff88801a277590 R14=ffff88801a277c80 R15=ffff88801a277548 RIP=ffffffff81131236 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 00007f120a821900 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=00007f120add8618 CR3=0000000019e42000 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=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