syzkaller login: [ 29.177378] BUG: Bad rss-counter state mm:000000004180558b type:MM_FILEPAGES val:33 [ 29.179289] BUG: Bad rss-counter state mm:000000004180558b type:MM_ANONPAGES val:22 [ 29.369010] ================================================================== [ 29.370096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.371246] Read of size 8 at addr ffff88800e4f4968 by task sshd/221 [ 29.372172] [ 29.372395] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.373251] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.374264] Call Trace: [ 29.374587] [ 29.374876] dump_stack_lvl+0x91/0xf0 [ 29.375383] print_report+0xcc/0x620 [ 29.375883] ? __virt_addr_valid+0x102/0x340 [ 29.376433] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.377056] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.377675] kasan_report+0xbe/0xf0 [ 29.378149] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.378792] vma_interval_tree_remove+0xc75/0xec0 [ 29.379435] vma_prepare+0xc54/0x11a0 [ 29.379937] __split_vma+0x5af/0x950 [ 29.380428] ? __pfx___split_vma+0x10/0x10 [ 29.380984] ? find_held_lock+0x2c/0x110 [ 29.381530] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.382119] ? lock_is_held_type+0x9f/0x120 [ 29.382685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.383339] ? mtree_range_walk+0x632/0x900 [ 29.383919] ? mas_walk+0x5c7/0x7c0 [ 29.384408] do_vmi_munmap+0x1f1/0x2b0 [ 29.384922] mmap_region+0x1f9/0x2660 [ 29.385424] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.385951] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.386694] ? __pfx_lock_acquire+0x10/0x10 [ 29.387253] ? __pfx_mmap_region+0x10/0x10 [ 29.387808] ? security_mmap_addr+0x7d/0xa0 [ 29.388362] ? get_unmapped_area+0x1f5/0x3f0 [ 29.388933] do_mmap+0x854/0xf00 [ 29.389387] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.389901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.390490] ksys_mmap_pgoff+0x3af/0x500 [ 29.391060] do_syscall_64+0x3f/0x90 [ 29.391562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.392229] RIP: 0033:0x7f513f3dcd82 [ 29.392713] 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 [ 29.394954] RSP: 002b:00007fffb9592a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.395898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f513f3dcd82 [ 29.396783] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f513e816000 [ 29.397666] RBP: 00007f513e816000 R08: 0000000000000009 R09: 0000000000001000 [ 29.398560] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea90fb3ec0 [ 29.399454] R13: 00007fffb9592a60 R14: 00007fffb9592a90 R15: 00007fffb9592df0 [ 29.400345] [ 29.400660] [ 29.400884] Allocated by task 211: [ 29.401337] kasan_save_stack+0x22/0x50 [ 29.401870] kasan_set_track+0x25/0x30 [ 29.402382] __kasan_slab_alloc+0x59/0x70 [ 29.402941] kmem_cache_alloc+0x16b/0x370 [ 29.403475] vm_area_dup+0x20/0x160 [ 29.403949] __split_vma+0x170/0x950 [ 29.404433] split_vma+0xc6/0x110 [ 29.404899] mprotect_fixup+0x8d2/0xb30 [ 29.405422] do_mprotect_pkey+0x87e/0xd40 [ 29.405968] __x64_sys_mprotect+0x78/0xc0 [ 29.406508] do_syscall_64+0x3f/0x90 [ 29.407010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.407678] [ 29.407900] Freed by task 13: [ 29.408297] kasan_save_stack+0x22/0x50 [ 29.408822] kasan_set_track+0x25/0x30 [ 29.409332] kasan_save_free_info+0x2b/0x50 [ 29.409886] __kasan_slab_free+0x10a/0x190 [ 29.410439] kmem_cache_free+0x10d/0x4d0 [ 29.410982] rcu_core+0x8c8/0x2860 [ 29.411441] __do_softirq+0x1b7/0x7d4 [ 29.411939] [ 29.412162] Last potentially related work creation: [ 29.412777] kasan_save_stack+0x22/0x50 [ 29.413299] __kasan_record_aux_stack+0x8e/0xa0 [ 29.413896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.414577] remove_vma+0x139/0x170 [ 29.415060] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.415638] do_vmi_munmap+0x1f1/0x2b0 [ 29.416141] __vm_munmap+0x138/0x3a0 [ 29.416627] __x64_sys_munmap+0x59/0x80 [ 29.417154] do_syscall_64+0x3f/0x90 [ 29.417649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.418319] [ 29.418539] Second to last potentially related work creation: [ 29.419266] kasan_save_stack+0x22/0x50 [ 29.419785] __kasan_record_aux_stack+0x8e/0xa0 [ 29.420383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.421056] remove_vma+0x139/0x170 [ 29.421524] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.422103] do_vmi_munmap+0x1f1/0x2b0 [ 29.422609] mmap_region+0x1f9/0x2660 [ 29.423117] do_mmap+0x854/0xf00 [ 29.423565] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.424077] ksys_mmap_pgoff+0x7d/0x500 [ 29.424592] do_syscall_64+0x3f/0x90 [ 29.425085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.425757] [ 29.425982] The buggy address belongs to the object at ffff88800e4f4910 [ 29.425982] which belongs to the cache vm_area_struct of size 168 [ 29.427521] The buggy address is located 88 bytes inside of [ 29.427521] freed 168-byte region [ffff88800e4f4910, ffff88800e4f49b8) [ 29.428998] [ 29.429225] The buggy address belongs to the physical page: [ 29.429914] page:00000000b62ff072 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4f4 [ 29.431062] memcg:ffff88800dbf3b01 [ 29.431508] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.432238] page_type: 0xffffffff() [ 29.432710] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.433673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbf3b01 [ 29.434623] page dumped because: kasan: bad access detected [ 29.435315] [ 29.435536] Memory state around the buggy address: [ 29.436139] ffff88800e4f4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.437029] ffff88800e4f4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.437918] >ffff88800e4f4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.438809] ^ [ 29.439637] ffff88800e4f4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.440547] ffff88800e4f4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.441439] ================================================================== [ 29.442611] Disabling lock debugging due to kernel taint [ 31.424529] BUG: Bad rss-counter state mm:0000000050cd44dc type:MM_FILEPAGES val:33 [ 31.425269] BUG: Bad rss-counter state mm:0000000050cd44dc type:MM_ANONPAGES val:22 [ 31.876787] BUG: Bad rss-counter state mm:000000009742df8d type:MM_FILEPAGES val:33 [ 31.877582] BUG: Bad rss-counter state mm:000000009742df8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12380' (ECDSA) to the list of known hosts. 2023/06/20 07:19:02 fuzzer started 2023/06/20 07:19:02 dialing manager at localhost:44161 2023/06/20 07:19:02 checking machine... 2023/06/20 07:19:02 checking revisions... [ 32.607207] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:19:02 testing simple program... [ 32.650672] cgroup: Unknown subsys name 'net' [ 32.720724] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:19:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880102674d0 RCX=0000000000000001 RDX=1ffff1100204ce9a RSI=ffffffff836382d7 RDI=ffff8880102674dc RBP=000000000000000b RSP=ffff8880102673e8 R8 =0000000000000001 R9 =ffff888010267448 R10=0000000000038001 R11=000000000009a9d0 R12=ffff8880102674d0 R13=0000000000000000 R14=ffff888016c33680 R15=000000000000001e RIP=ffffffff813ad4cf 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 00007f305bd57900 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=00007f4c3e731650 CR3=000000000c652000 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=d6b5e8d514871b996145c3888c46489a XMM02=eff9b2d0a8fce9cb000000000011fd38 XMM03=2c67c8bc2e329bc3000000000011fe60 XMM04=018afe8698709abc00000000000ae988 XMM05=91fd9e1bcb9a885b0000000000136608 XMM06=806171799158d96700000000001353f8 XMM07=fb795ef6d65770560000000000123da0 XMM08=2c67c8bc2e329bc3000000000011fe60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016cd51c0 RSI=ffffffff8186c18e RDI=ffff888016cd5b40 RBP=ffff88800e0a0500 RSP=ffff88800daf7de0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000003 R13=ffff88800e0a0550 R14=ffff8880199d1200 R15=ffff88800e0a0680 RIP=ffffffff8186c18e RFL=00000293 [--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 00007f4c3e17c900 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=00007f4c3e733618 CR3=0000000016488000 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