syzkaller login: [ 28.837787] BUG: Bad rss-counter state mm:00000000c3be9746 type:MM_FILEPAGES val:33 [ 28.838962] BUG: Bad rss-counter state mm:00000000c3be9746 type:MM_ANONPAGES val:22 [ 28.875855] ================================================================== [ 28.876801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.877838] Read of size 8 at addr ffff88800ef9ded8 by task sshd/221 [ 28.878675] [ 28.878894] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.879754] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.880760] Call Trace: [ 28.881081] <TASK> [ 28.881369] dump_stack_lvl+0x91/0xf0 [ 28.881863] print_report+0xcc/0x620 [ 28.882344] ? __virt_addr_valid+0x102/0x340 [ 28.882898] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.883526] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.884163] kasan_report+0xbe/0xf0 [ 28.884734] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885377] vma_interval_tree_remove+0xc75/0xec0 [ 28.886003] vma_prepare+0xc54/0x11a0 [ 28.886507] __split_vma+0x5af/0x950 [ 28.886979] ? __pfx___split_vma+0x10/0x10 [ 28.887511] ? find_held_lock+0x2c/0x110 [ 28.888033] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.888601] ? lock_is_held_type+0x9f/0x120 [ 28.889139] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.889739] ? mtree_range_walk+0x632/0x900 [ 28.890296] ? mas_walk+0x5c7/0x7c0 [ 28.890771] do_vmi_munmap+0x1f1/0x2b0 [ 28.891260] mmap_region+0x1f9/0x2660 [ 28.891743] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.892257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.892981] ? __pfx_lock_acquire+0x10/0x10 [ 28.893512] ? __pfx_mmap_region+0x10/0x10 [ 28.894040] ? security_mmap_addr+0x7d/0xa0 [ 28.894565] ? get_unmapped_area+0x1f5/0x3f0 [ 28.895109] do_mmap+0x854/0xf00 [ 28.895550] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.896036] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.896611] ksys_mmap_pgoff+0x3af/0x500 [ 28.897113] do_syscall_64+0x3f/0x90 [ 28.897590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.898228] RIP: 0033:0x7fb57a678d82 [ 28.898683] 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 [ 28.900794] RSP: 002b:00007ffc33467828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.901687] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb57a678d82 [ 28.902523] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb579ab2000 [ 28.903364] RBP: 00007fb579ab2000 R08: 0000000000000009 R09: 0000000000001000 [ 28.904197] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab3c182d90 [ 28.905061] R13: 00007ffc33467840 R14: 00007ffc33467870 R15: 00007ffc33467bd0 [ 28.905904] </TASK> [ 28.906194] [ 28.906410] Allocated by task 213: [ 28.906835] kasan_save_stack+0x22/0x50 [ 28.907338] kasan_set_track+0x25/0x30 [ 28.907826] __kasan_slab_alloc+0x59/0x70 [ 28.908351] kmem_cache_alloc+0x16b/0x370 [ 28.908873] vm_area_dup+0x20/0x160 [ 28.909327] __split_vma+0x170/0x950 [ 28.909794] split_vma+0xc6/0x110 [ 28.910241] mprotect_fixup+0x8d2/0xb30 [ 28.910756] do_mprotect_pkey+0x87e/0xd40 [ 28.911277] __x64_sys_mprotect+0x78/0xc0 [ 28.911800] do_syscall_64+0x3f/0x90 [ 28.912279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.912939] [ 28.913159] Freed by task 213: [ 28.913562] kasan_save_stack+0x22/0x50 [ 28.914072] kasan_set_track+0x25/0x30 [ 28.914577] kasan_save_free_info+0x2b/0x50 [ 28.915098] __kasan_slab_free+0x10a/0x190 [ 28.915635] kmem_cache_free+0x10d/0x4d0 [ 28.916147] rcu_core+0x8c8/0x2860 [ 28.916616] __do_softirq+0x1b7/0x7d4 [ 28.917103] [ 28.917314] Last potentially related work creation: [ 28.917922] kasan_save_stack+0x22/0x50 [ 28.918428] __kasan_record_aux_stack+0x8e/0xa0 [ 28.919007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.919652] remove_vma+0x139/0x170 [ 28.920113] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.920695] do_vmi_munmap+0x1f1/0x2b0 [ 28.921177] __vm_munmap+0x138/0x3a0 [ 28.921650] __x64_sys_munmap+0x59/0x80 [ 28.922159] do_syscall_64+0x3f/0x90 [ 28.922653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.923347] [ 28.923563] The buggy address belongs to the object at ffff88800ef9de80 [ 28.923563] which belongs to the cache vm_area_struct of size 168 [ 28.925037] The buggy address is located 88 bytes inside of [ 28.925037] freed 168-byte region [ffff88800ef9de80, ffff88800ef9df28) [ 28.926440] [ 28.926658] The buggy address belongs to the physical page: [ 28.927316] page:00000000a1156330 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef9d [ 28.928402] memcg:ffff88800db83501 [ 28.928847] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.929512] page_type: 0xffffffff() [ 28.929961] raw: 0100000000000200 ffff8880087a0c80 ffffea000037d800 dead000000000006 [ 28.930873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db83501 [ 28.931786] page dumped because: kasan: bad access detected [ 28.932459] [ 28.932677] Memory state around the buggy address: [ 28.933267] ffff88800ef9dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.934119] ffff88800ef9de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.934973] >ffff88800ef9de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.935833] ^ [ 28.936564] ffff88800ef9df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.937423] ffff88800ef9df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.938275] ================================================================== [ 28.939316] Disabling lock debugging due to kernel taint [ 30.548929] BUG: Bad rss-counter state mm:00000000073dbf5a type:MM_FILEPAGES val:33 [ 30.550023] BUG: Bad rss-counter state mm:00000000073dbf5a type:MM_ANONPAGES val:22 [ 30.935100] BUG: Bad rss-counter state mm:0000000078058c58 type:MM_FILEPAGES val:33 [ 30.936251] BUG: Bad rss-counter state mm:0000000078058c58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50638' (ECDSA) to the list of known hosts. 2023/06/21 04:18:06 fuzzer started 2023/06/21 04:18:06 dialing manager at localhost:36067 2023/06/21 04:18:06 checking machine... 2023/06/21 04:18:06 checking revisions... [ 31.643699] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:18:06 testing simple program... [ 31.683854] cgroup: Unknown subsys name 'net' [ 31.725822] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:18:06 Registers: info registers vcpu 0 RAX=ffff888014283680 RBX=ffff88800d5f73a8 RCX=ffffffff81132ffe RDX=ffff88800d5f72c0 RSI=0000000000000000 RDI=ffff88800d5f7380 RBP=ffff888014283680 RSP=ffff88800d5f72c0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800d5f7310 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800d5f7338 R14=ffff88800d5f7358 R15=ffff88800d5f7310 RIP=ffffffff81133010 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 00007ff23c68d900 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=00007ff23bab8e90 CR3=000000000c670000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7a7249902745d37400000000000ae988 XMM05=e8f5a20ca7c23f3d0000000000132688 XMM06=e4cb8bb95a7664b600000000001317d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83723b20 RBX=1ffff11001357f16 RCX=0000000000000000 RDX=1ffff110011b99d1 RSI=ffffffff83741f39 RDI=ffff888008dcce88 RBP=ffff88800c796100 RSP=ffff888009abf890 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000006 R13=ffff88800e5fc518 R14=ffff88800e5fc500 R15=ffff888008dcce80 RIP=ffffffff83741f5c 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 00007f5ea1cda900 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=00007f5ea2291618 CR3=000000001697a000 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=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