syzkaller login: [ 97.601004] BUG: Bad rss-counter state mm:00000000e4fb5692 type:MM_FILEPAGES val:33 [ 97.602479] BUG: Bad rss-counter state mm:00000000e4fb5692 type:MM_ANONPAGES val:22 [ 97.755512] ================================================================== [ 97.756601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 97.757717] Read of size 8 at addr ffff888016878310 by task sshd/228 [ 97.758714] [ 97.758938] CPU: 0 PID: 228 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 97.759969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 97.760969] Call Trace: [ 97.761292] [ 97.761583] dump_stack_lvl+0x91/0xf0 [ 97.762076] print_report+0xcc/0x620 [ 97.762571] ? __virt_addr_valid+0x102/0x340 [ 97.763137] ? vma_interval_tree_remove+0xc75/0xec0 [ 97.763761] ? vma_interval_tree_remove+0xc75/0xec0 [ 97.764385] kasan_report+0xbe/0xf0 [ 97.764868] ? vma_interval_tree_remove+0xc75/0xec0 [ 97.765493] vma_interval_tree_remove+0xc75/0xec0 [ 97.766096] vma_prepare+0xc54/0x11a0 [ 97.766592] __split_vma+0x5af/0x950 [ 97.767067] ? __pfx___split_vma+0x10/0x10 [ 97.767601] ? find_held_lock+0x2c/0x110 [ 97.768123] do_vmi_align_munmap+0x2ba/0x11f0 [ 97.768685] ? lock_is_held_type+0x9f/0x120 [ 97.769223] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 97.769835] ? mtree_range_walk+0x632/0x900 [ 97.770399] ? mas_walk+0x5c7/0x7c0 [ 97.770880] do_vmi_munmap+0x1f1/0x2b0 [ 97.771369] mmap_region+0x1f9/0x2660 [ 97.771849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 97.772357] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 97.773065] ? __pfx_lock_acquire+0x10/0x10 [ 97.773592] ? __pfx_mmap_region+0x10/0x10 [ 97.774122] ? security_mmap_addr+0x7d/0xa0 [ 97.774674] ? get_unmapped_area+0x1f5/0x3f0 [ 97.775229] do_mmap+0x854/0xf00 [ 97.775666] vm_mmap_pgoff+0x1a6/0x3a0 [ 97.776172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 97.776735] ksys_mmap_pgoff+0x3af/0x500 [ 97.777244] do_syscall_64+0x3f/0x90 [ 97.777719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 97.778370] RIP: 0033:0x7fa493fcad82 [ 97.778828] 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 [ 97.780924] RSP: 002b:00007ffdf3a41ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 97.781834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa493fcad82 [ 97.782684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa493404000 [ 97.783517] RBP: 00007fa493404000 R08: 0000000000000009 R09: 0000000000001000 [ 97.784364] R10: 0000000000000812 R11: 0000000000000206 R12: 000055576f084ec0 [ 97.785209] R13: 00007ffdf3a41af0 R14: 00007ffdf3a41b20 R15: 00007ffdf3a41e80 [ 97.786058] [ 97.786367] [ 97.786584] Allocated by task 220: [ 97.787015] kasan_save_stack+0x22/0x50 [ 97.787518] kasan_set_track+0x25/0x30 [ 97.788014] __kasan_slab_alloc+0x59/0x70 [ 97.788539] kmem_cache_alloc+0x16b/0x370 [ 97.789056] vm_area_dup+0x20/0x160 [ 97.789511] __split_vma+0x170/0x950 [ 97.789988] split_vma+0xc6/0x110 [ 97.790440] mprotect_fixup+0x8d2/0xb30 [ 97.790938] do_mprotect_pkey+0x87e/0xd40 [ 97.791458] __x64_sys_mprotect+0x78/0xc0 [ 97.791975] do_syscall_64+0x3f/0x90 [ 97.792448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 97.793095] [ 97.793308] Freed by task 220: [ 97.793702] kasan_save_stack+0x22/0x50 [ 97.794201] kasan_set_track+0x25/0x30 [ 97.794722] kasan_save_free_info+0x2b/0x50 [ 97.795255] __kasan_slab_free+0x10a/0x190 [ 97.795795] kmem_cache_free+0x10d/0x4d0 [ 97.796305] rcu_core+0x8c8/0x2860 [ 97.796760] __do_softirq+0x1b7/0x7d4 [ 97.797241] [ 97.797455] Last potentially related work creation: [ 97.798037] kasan_save_stack+0x22/0x50 [ 97.798540] __kasan_record_aux_stack+0x8e/0xa0 [ 97.799115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 97.799760] remove_vma+0x139/0x170 [ 97.800210] do_vmi_align_munmap+0xd4a/0x11f0 [ 97.800763] do_vmi_munmap+0x1f1/0x2b0 [ 97.801258] __vm_munmap+0x138/0x3a0 [ 97.801727] __x64_sys_munmap+0x59/0x80 [ 97.802238] do_syscall_64+0x3f/0x90 [ 97.802727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 97.803379] [ 97.803597] The buggy address belongs to the object at ffff8880168782b8 [ 97.803597] which belongs to the cache vm_area_struct of size 168 [ 97.805049] The buggy address is located 88 bytes inside of [ 97.805049] freed 168-byte region [ffff8880168782b8, ffff888016878360) [ 97.806484] [ 97.806702] The buggy address belongs to the physical page: [ 97.807364] page:000000005cfd58a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16878 [ 97.808452] memcg:ffff888019f7f801 [ 97.808884] flags: 0x100000000000200(slab|node=0|zone=1) [ 97.809526] page_type: 0xffffffff() [ 97.809984] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 97.810915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f7f801 [ 97.811826] page dumped because: kasan: bad access detected [ 97.812484] [ 97.812703] Memory state around the buggy address: [ 97.813279] ffff888016878200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 97.814132] ffff888016878280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 97.814991] >ffff888016878300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 97.815837] ^ [ 97.816300] ffff888016878380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 97.817154] ffff888016878400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 97.818017] ================================================================== [ 97.819007] Disabling lock debugging due to kernel taint [ 99.674087] BUG: Bad rss-counter state mm:000000000e491c8b type:MM_FILEPAGES val:33 [ 99.675314] BUG: Bad rss-counter state mm:000000000e491c8b type:MM_ANONPAGES val:22 [ 100.212239] BUG: Bad rss-counter state mm:00000000e2fd225e type:MM_FILEPAGES val:33 [ 100.213420] BUG: Bad rss-counter state mm:00000000e2fd225e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31663' (ECDSA) to the list of known hosts. 2023/06/19 23:51:53 fuzzer started 2023/06/19 23:51:53 dialing manager at localhost:44161 2023/06/19 23:51:53 checking machine... 2023/06/19 23:51:53 checking revisions... [ 100.876301] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:51:54 testing simple program... [ 100.909387] cgroup: Unknown subsys name 'net' [ 100.940382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:51:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055bb884d0ec0 RCX=00007ffc96ec2628 RDX=00007ffc96ec2630 RSI=0000000000000000 RDI=000055bb884d0ec0 RBP=00007ffc96ec2610 RSP=00007ffc96ec2050 R8 =000055bb884b04a0 R9 =00000000ffffffff R10=000055bb884acb20 R11=0000000000000000 R12=0000000000000000 R13=00007ffc96ec2630 R14=000055bb884d3f50 R15=00007ffc96ec26e0 RIP=00007f707618e144 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7075cb2900 00000000 00000000 GS =0000 0000000000000000 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=000055bb884c8f98 CR3=000000000ef8e000 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=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=0000000000000050 RBX=ffff88800f2e0000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffffffff85a237a0 RSP=ffff88800f4873a0 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000128 R12=0000000000010177 R13=ffffed1001e5c001 R14=dffffc0000000000 R15=ffff88800f2e0060 RIP=ffffffff821920cf RFL=00000093 [--S-A-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 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=00007ffd160e3748 CR3=000000000d69a000 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=2033353a31353a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3733 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3733325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a31353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000