syzkaller login: [ 34.542071] BUG: Bad rss-counter state mm:00000000377616eb type:MM_FILEPAGES val:33 [ 34.544119] BUG: Bad rss-counter state mm:00000000377616eb type:MM_ANONPAGES val:22 [ 34.712079] ================================================================== [ 34.713063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.714105] Read of size 8 at addr ffff88800e6c8a50 by task sshd/219 [ 34.715065] [ 34.715308] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.716259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.717346] Call Trace: [ 34.717694] [ 34.718013] dump_stack_lvl+0x91/0xf0 [ 34.718556] print_report+0xcc/0x620 [ 34.719119] ? __virt_addr_valid+0x102/0x340 [ 34.719723] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.720409] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.721091] kasan_report+0xbe/0xf0 [ 34.721618] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.722302] vma_interval_tree_remove+0xc75/0xec0 [ 34.722977] vma_prepare+0xc54/0x11a0 [ 34.723506] __split_vma+0x5af/0x950 [ 34.724021] ? __pfx___split_vma+0x10/0x10 [ 34.724609] ? find_held_lock+0x2c/0x110 [ 34.725187] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.725820] ? lock_is_held_type+0x9f/0x120 [ 34.726413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.727103] ? mtree_range_walk+0x632/0x900 [ 34.727721] ? mas_walk+0x5c7/0x7c0 [ 34.728240] do_vmi_munmap+0x1f1/0x2b0 [ 34.728789] mmap_region+0x1f9/0x2660 [ 34.729319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.729892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.730693] ? __pfx_lock_acquire+0x10/0x10 [ 34.731284] ? __pfx_mmap_region+0x10/0x10 [ 34.731880] ? security_mmap_addr+0x7d/0xa0 [ 34.732470] ? get_unmapped_area+0x1f5/0x3f0 [ 34.733099] do_mmap+0x854/0xf00 [ 34.733566] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.734087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.734693] ksys_mmap_pgoff+0x3af/0x500 [ 34.735241] do_syscall_64+0x3f/0x90 [ 34.735745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.736422] RIP: 0033:0x7fdbeb557d82 [ 34.736901] 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 [ 34.739153] RSP: 002b:00007ffe412f4dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.740115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbeb557d82 [ 34.741011] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbea991000 [ 34.741902] RBP: 00007fdbea991000 R08: 0000000000000009 R09: 0000000000001000 [ 34.742846] R10: 0000000000000812 R11: 0000000000000206 R12: 000055831b7aed90 [ 34.743742] R13: 00007ffe412f4de0 R14: 00007ffe412f4e10 R15: 00007ffe412f5170 [ 34.744658] [ 34.744963] [ 34.745191] Allocated by task 212: [ 34.745641] kasan_save_stack+0x22/0x50 [ 34.746175] kasan_set_track+0x25/0x30 [ 34.746715] __kasan_slab_alloc+0x59/0x70 [ 34.747280] kmem_cache_alloc+0x16b/0x370 [ 34.747816] vm_area_dup+0x20/0x160 [ 34.748301] __split_vma+0x170/0x950 [ 34.748796] split_vma+0xc6/0x110 [ 34.749273] mprotect_fixup+0x8d2/0xb30 [ 34.749807] do_mprotect_pkey+0x87e/0xd40 [ 34.750357] __x64_sys_mprotect+0x78/0xc0 [ 34.750932] do_syscall_64+0x3f/0x90 [ 34.751439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.752113] [ 34.752340] Freed by task 212: [ 34.752763] kasan_save_stack+0x22/0x50 [ 34.753294] kasan_set_track+0x25/0x30 [ 34.753817] kasan_save_free_info+0x2b/0x50 [ 34.754378] __kasan_slab_free+0x10a/0x190 [ 34.754948] kmem_cache_free+0x10d/0x4d0 [ 34.755482] rcu_core+0x8c8/0x2860 [ 34.755944] __do_softirq+0x1b7/0x7d4 [ 34.756454] [ 34.756680] Last potentially related work creation: [ 34.757316] kasan_save_stack+0x22/0x50 [ 34.757856] __kasan_record_aux_stack+0x8e/0xa0 [ 34.758465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.759182] remove_vma+0x139/0x170 [ 34.759671] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.760273] do_vmi_munmap+0x1f1/0x2b0 [ 34.760791] __vm_munmap+0x138/0x3a0 [ 34.761282] __x64_sys_munmap+0x59/0x80 [ 34.761797] do_syscall_64+0x3f/0x90 [ 34.762302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.763003] [ 34.763235] Second to last potentially related work creation: [ 34.763967] kasan_save_stack+0x22/0x50 [ 34.764503] __kasan_record_aux_stack+0x8e/0xa0 [ 34.765119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.765794] remove_vma+0x139/0x170 [ 34.766274] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.766876] do_vmi_munmap+0x1f1/0x2b0 [ 34.767388] mmap_region+0x1f9/0x2660 [ 34.767895] do_mmap+0x854/0xf00 [ 34.768345] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.768878] ksys_mmap_pgoff+0x3af/0x500 [ 34.769424] do_syscall_64+0x3f/0x90 [ 34.769932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.770628] [ 34.770873] The buggy address belongs to the object at ffff88800e6c89f8 [ 34.770873] which belongs to the cache vm_area_struct of size 168 [ 34.772473] The buggy address is located 88 bytes inside of [ 34.772473] freed 168-byte region [ffff88800e6c89f8, ffff88800e6c8aa0) [ 34.773982] [ 34.774227] The buggy address belongs to the physical page: [ 34.774959] page:00000000aacb22a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6c8 [ 34.776128] memcg:ffff88800dee2501 [ 34.776586] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.777338] page_type: 0xffffffff() [ 34.777821] raw: 0100000000000200 ffff88800879fc80 ffffea00003213c0 dead000000000005 [ 34.778826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee2501 [ 34.779796] page dumped because: kasan: bad access detected [ 34.780513] [ 34.780739] Memory state around the buggy address: [ 34.781362] ffff88800e6c8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.782283] ffff88800e6c8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.783218] >ffff88800e6c8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.784138] ^ [ 34.784890] ffff88800e6c8a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 34.785805] ffff88800e6c8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.786727] ================================================================== [ 34.787778] Disabling lock debugging due to kernel taint [ 36.711825] BUG: Bad rss-counter state mm:00000000b5efde46 type:MM_FILEPAGES val:33 [ 36.713032] BUG: Bad rss-counter state mm:00000000b5efde46 type:MM_ANONPAGES val:22 [ 37.193510] BUG: Bad rss-counter state mm:00000000b8c166da type:MM_FILEPAGES val:33 [ 37.194514] BUG: Bad rss-counter state mm:00000000b8c166da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5519' (ECDSA) to the list of known hosts. 2023/06/19 20:46:56 fuzzer started 2023/06/19 20:46:56 dialing manager at localhost:44161 2023/06/19 20:46:56 checking machine... 2023/06/19 20:46:56 checking revisions... [ 37.922877] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:46:57 testing simple program... [ 37.972984] cgroup: Unknown subsys name 'net' [ 38.012073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:46:53 Registers: info registers vcpu 0 RAX=0000000000000019 RBX=ffff88800d04e600 RCX=0000000000000000 RDX=1ffff11001a09ccd RSI=0000000000000019 RDI=0000000000000000 RBP=ffff88800d0ba370 RSP=ffff888016ab7640 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800c53a400 R13=0000000000000019 R14=0000000000000000 R15=ffff88800c53a540 RIP=ffffffff814c0384 RFL=00000002 [-------] 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 00007fdc803d5700 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=00007ff88a1f4150 CR3=000000000e2d0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36323636332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81ef60ea RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100206df30 RSI=ffffffff81ef60ea RDI=ffff88801036f9f0 RBP=ffff88801036f9c0 RSP=ffff88801036f920 R8 =0000000000000001 R9 =ffff88801036f968 R10=0000000000038001 R11=00000000000397e7 R12=ffff88801036f9f0 R13=0000000000000000 R14=ffff8880174d9b40 R15=ffff888010341000 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007fbeacb14900 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=00007ffd7f46d000 CR3=0000000010320000 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