syzkaller login: [ 28.996831] BUG: Bad rss-counter state mm:00000000a44233f4 type:MM_FILEPAGES val:33 [ 28.997991] BUG: Bad rss-counter state mm:00000000a44233f4 type:MM_ANONPAGES val:22 [ 29.216925] ================================================================== [ 29.218339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.219592] Read of size 8 at addr ffff88800eed4a50 by task sshd/220 [ 29.220649] [ 29.220945] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.222137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.223475] Call Trace: [ 29.223909] [ 29.224305] dump_stack_lvl+0x91/0xf0 [ 29.224989] print_report+0xcc/0x620 [ 29.225614] ? __virt_addr_valid+0x102/0x340 [ 29.226445] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.227284] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.228115] kasan_report+0xbe/0xf0 [ 29.228767] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.229600] vma_interval_tree_remove+0xc75/0xec0 [ 29.230405] vma_prepare+0xc54/0x11a0 [ 29.231011] __split_vma+0x5af/0x950 [ 29.231610] ? __pfx___split_vma+0x10/0x10 [ 29.232306] ? find_held_lock+0x2c/0x110 [ 29.233000] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.233785] ? lock_is_held_type+0x9f/0x120 [ 29.234589] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.235411] ? mtree_range_walk+0x632/0x900 [ 29.236174] ? mas_walk+0x5c7/0x7c0 [ 29.236812] do_vmi_munmap+0x1f1/0x2b0 [ 29.237485] mmap_region+0x1f9/0x2660 [ 29.238134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.238867] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.239820] ? __pfx_lock_acquire+0x10/0x10 [ 29.240498] ? __pfx_mmap_region+0x10/0x10 [ 29.241169] ? security_mmap_addr+0x7d/0xa0 [ 29.241829] ? get_unmapped_area+0x1f5/0x3f0 [ 29.242555] do_mmap+0x854/0xf00 [ 29.243106] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.243742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.244442] ksys_mmap_pgoff+0x3af/0x500 [ 29.245073] do_syscall_64+0x3f/0x90 [ 29.245676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.246522] RIP: 0033:0x7f49a79c1d82 [ 29.247100] 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 [ 29.249762] RSP: 002b:00007ffe9548a968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.250903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49a79c1d82 [ 29.251943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49a6dfb000 [ 29.252997] RBP: 00007f49a6dfb000 R08: 0000000000000009 R09: 0000000000001000 [ 29.254043] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc84b0eb20 [ 29.255129] R13: 00007ffe9548a980 R14: 00007ffe9548a9b0 R15: 00007ffe9548ad10 [ 29.256217] [ 29.256575] [ 29.256855] Allocated by task 213: [ 29.257418] kasan_save_stack+0x22/0x50 [ 29.258064] kasan_set_track+0x25/0x30 [ 29.258766] __kasan_slab_alloc+0x59/0x70 [ 29.259415] kmem_cache_alloc+0x16b/0x370 [ 29.260039] vm_area_dup+0x20/0x160 [ 29.260595] __split_vma+0x170/0x950 [ 29.261173] split_vma+0xc6/0x110 [ 29.261708] mprotect_fixup+0x8d2/0xb30 [ 29.262353] do_mprotect_pkey+0x87e/0xd40 [ 29.263004] __x64_sys_mprotect+0x78/0xc0 [ 29.263636] do_syscall_64+0x3f/0x90 [ 29.264237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.265039] [ 29.265316] Freed by task 213: [ 29.265827] kasan_save_stack+0x22/0x50 [ 29.266504] kasan_set_track+0x25/0x30 [ 29.267109] kasan_save_free_info+0x2b/0x50 [ 29.267766] __kasan_slab_free+0x10a/0x190 [ 29.268443] kmem_cache_free+0x10d/0x4d0 [ 29.269081] rcu_core+0x8c8/0x2860 [ 29.269635] __do_softirq+0x1b7/0x7d4 [ 29.270235] [ 29.270553] Last potentially related work creation: [ 29.271288] kasan_save_stack+0x22/0x50 [ 29.271917] __kasan_record_aux_stack+0x8e/0xa0 [ 29.272630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.273427] remove_vma+0x139/0x170 [ 29.273974] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.274715] do_vmi_munmap+0x1f1/0x2b0 [ 29.275320] __vm_munmap+0x138/0x3a0 [ 29.275903] __x64_sys_munmap+0x59/0x80 [ 29.276519] do_syscall_64+0x3f/0x90 [ 29.277101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.277893] [ 29.278149] The buggy address belongs to the object at ffff88800eed49f8 [ 29.278149] which belongs to the cache vm_area_struct of size 168 [ 29.279955] The buggy address is located 88 bytes inside of [ 29.279955] freed 168-byte region [ffff88800eed49f8, ffff88800eed4aa0) [ 29.281639] [ 29.281895] The buggy address belongs to the physical page: [ 29.282721] page:0000000049d33f20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeed4 [ 29.284001] memcg:ffff88800dd96b01 [ 29.284504] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.285270] page_type: 0xffffffff() [ 29.285813] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.286994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd96b01 [ 29.288137] page dumped because: kasan: bad access detected [ 29.288952] [ 29.289219] Memory state around the buggy address: [ 29.289957] ffff88800eed4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.291019] ffff88800eed4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.292062] >ffff88800eed4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.293131] ^ [ 29.294001] ffff88800eed4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.295099] ffff88800eed4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.296143] ================================================================== [ 29.297609] Disabling lock debugging due to kernel taint [ 31.392499] BUG: Bad rss-counter state mm:00000000c8fbbe1a type:MM_FILEPAGES val:33 [ 31.393212] BUG: Bad rss-counter state mm:00000000c8fbbe1a type:MM_ANONPAGES val:22 [ 31.760663] BUG: Bad rss-counter state mm:00000000673118bf type:MM_FILEPAGES val:33 [ 31.761373] BUG: Bad rss-counter state mm:00000000673118bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10735' (ECDSA) to the list of known hosts. 2023/06/21 09:31:17 fuzzer started 2023/06/21 09:31:17 dialing manager at localhost:36067 2023/06/21 09:31:17 checking machine... 2023/06/21 09:31:17 checking revisions... [ 32.325231] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:31:17 testing simple program... [ 32.370650] cgroup: Unknown subsys name 'net' [ 32.402952] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:31:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=0000000000000008 RSI=ffff88806ce09fb8 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce099e8 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09fb8 R15=ffff88806ce09a78 RIP=ffffffff81130400 RFL=00000287 [--S--PC] 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 00007f0ca61d9900 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=00007ffd0e688000 CR3=0000000014702000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fbd41358000 CR3=000000000978a000 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=2037313a31333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000