syzkaller login: [ 30.066823] BUG: Bad rss-counter state mm:000000008c7359f1 type:MM_FILEPAGES val:33 [ 30.068321] BUG: Bad rss-counter state mm:000000008c7359f1 type:MM_ANONPAGES val:22 [ 30.221077] ================================================================== [ 30.222144] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.223273] Read of size 8 at addr ffff888018d08798 by task sshd/220 [ 30.224121] [ 30.224346] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.225206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.226210] Call Trace: [ 30.226539] [ 30.226820] dump_stack_lvl+0x91/0xf0 [ 30.227311] print_report+0xcc/0x620 [ 30.227792] ? __virt_addr_valid+0x102/0x340 [ 30.228343] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.228956] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.229574] kasan_report+0xbe/0xf0 [ 30.230042] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.230665] vma_interval_tree_remove+0xc75/0xec0 [ 30.231264] vma_prepare+0xc54/0x11a0 [ 30.231745] __split_vma+0x5af/0x950 [ 30.232213] ? __pfx___split_vma+0x10/0x10 [ 30.232742] ? find_held_lock+0x2c/0x110 [ 30.233262] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.233829] ? lock_is_held_type+0x9f/0x120 [ 30.234363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.234985] ? mtree_range_walk+0x632/0x900 [ 30.235529] ? mas_walk+0x5c7/0x7c0 [ 30.236005] do_vmi_munmap+0x1f1/0x2b0 [ 30.236496] mmap_region+0x1f9/0x2660 [ 30.236976] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.237478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.238178] ? __pfx_lock_acquire+0x10/0x10 [ 30.238712] ? __pfx_mmap_region+0x10/0x10 [ 30.239242] ? security_mmap_addr+0x7d/0xa0 [ 30.239773] ? get_unmapped_area+0x1f5/0x3f0 [ 30.240317] do_mmap+0x854/0xf00 [ 30.240754] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.241249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.241808] ksys_mmap_pgoff+0x3af/0x500 [ 30.242306] do_syscall_64+0x3f/0x90 [ 30.242794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.243435] RIP: 0033:0x7f798b1c2d82 [ 30.243893] 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 [ 30.246018] RSP: 002b:00007fff528ecdc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.246944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f798b1c2d82 [ 30.247785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f798a5fc000 [ 30.248632] RBP: 00007f798a5fc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.249465] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcb8fd5f70 [ 30.250301] R13: 00007fff528ecde0 R14: 00007fff528ece10 R15: 00007fff528ed170 [ 30.251149] [ 30.251445] [ 30.251661] Allocated by task 213: [ 30.252084] kasan_save_stack+0x22/0x50 [ 30.252581] kasan_set_track+0x25/0x30 [ 30.253070] __kasan_slab_alloc+0x59/0x70 [ 30.253586] kmem_cache_alloc+0x16b/0x370 [ 30.254095] vm_area_dup+0x20/0x160 [ 30.254550] __split_vma+0x170/0x950 [ 30.255010] split_vma+0xc6/0x110 [ 30.255444] mprotect_fixup+0x8d2/0xb30 [ 30.255950] do_mprotect_pkey+0x87e/0xd40 [ 30.256470] __x64_sys_mprotect+0x78/0xc0 [ 30.256982] do_syscall_64+0x3f/0x90 [ 30.257458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.258102] [ 30.258317] Freed by task 213: [ 30.258727] kasan_save_stack+0x22/0x50 [ 30.259223] kasan_set_track+0x25/0x30 [ 30.259718] kasan_save_free_info+0x2b/0x50 [ 30.260239] __kasan_slab_free+0x10a/0x190 [ 30.260764] kmem_cache_free+0x10d/0x4d0 [ 30.261262] rcu_core+0x8c8/0x2860 [ 30.261706] __do_softirq+0x1b7/0x7d4 [ 30.262185] [ 30.262401] Last potentially related work creation: [ 30.262988] kasan_save_stack+0x22/0x50 [ 30.263506] __kasan_record_aux_stack+0x8e/0xa0 [ 30.264104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.264767] remove_vma+0x139/0x170 [ 30.265223] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.265780] do_vmi_munmap+0x1f1/0x2b0 [ 30.266277] __vm_munmap+0x138/0x3a0 [ 30.266751] __x64_sys_munmap+0x59/0x80 [ 30.267250] do_syscall_64+0x3f/0x90 [ 30.267725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.268383] [ 30.268596] The buggy address belongs to the object at ffff888018d08740 [ 30.268596] which belongs to the cache vm_area_struct of size 168 [ 30.270064] The buggy address is located 88 bytes inside of [ 30.270064] freed 168-byte region [ffff888018d08740, ffff888018d087e8) [ 30.271509] [ 30.271724] The buggy address belongs to the physical page: [ 30.272380] page:000000007b3ccf9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d08 [ 30.273473] memcg:ffff888018d09001 [ 30.273894] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.274544] page_type: 0xffffffff() [ 30.275002] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.275931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d09001 [ 30.276857] page dumped because: kasan: bad access detected [ 30.277532] [ 30.277753] Memory state around the buggy address: [ 30.278343] ffff888018d08680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.279215] ffff888018d08700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.280074] >ffff888018d08780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.280959] ^ [ 30.281467] ffff888018d08800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.282339] ffff888018d08880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.283217] ================================================================== [ 30.284190] Disabling lock debugging due to kernel taint [ 32.312562] BUG: Bad rss-counter state mm:000000004bb7de41 type:MM_FILEPAGES val:33 [ 32.313714] BUG: Bad rss-counter state mm:000000004bb7de41 type:MM_ANONPAGES val:22 [ 32.721439] BUG: Bad rss-counter state mm:00000000a7051377 type:MM_FILEPAGES val:33 [ 32.722385] BUG: Bad rss-counter state mm:00000000a7051377 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54324' (ECDSA) to the list of known hosts. 2023/06/20 17:34:53 fuzzer started 2023/06/20 17:34:54 dialing manager at localhost:36067 2023/06/20 17:34:54 checking machine... 2023/06/20 17:34:54 checking revisions... [ 33.437494] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:34:54 testing simple program... [ 33.494267] cgroup: Unknown subsys name 'net' [ 33.536523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:34:53 Registers: info registers vcpu 0 RAX=ffff88800c78f800 RBX=ffff88800e0689e8 RCX=1ffff110032f7686 RDX=dffffc0000000000 RSI=ffff88800c7a0b80 RDI=ffff88800e068a20 RBP=ffff88800e0689f8 RSP=ffff88801cd67a38 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800c7a0900 R13=0000000000000000 R14=ffff88800ff1b048 R15=ffff88800ff1b000 RIP=ffffffff81847695 RFL=00000083 [--S---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 00007f49ea0e4900 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=00007fff988ff000 CR3=00000000095b8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e0d240 RCX=ffffffff812525c1 RDX=0000000000000000 RSI=000000000001203c RDI=ffff888008e0d1c0 RBP=0000000000000001 RSP=ffff888008e37c80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=000000000001203c R13=ffff888008e0d1c0 R14=ffff888008e0d290 R15=0000000000000001 RIP=ffffffff812ab7c4 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 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=00007f020a6fc970 CR3=000000000c670000 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=720a7a52fb9780ad51485b3919fff80b XMM02=2c67c8bc2e329bc3000000000011a260 XMM03=fb795ef6d65770560000000000121b08 XMM04=555830d020016e4d00000000000ae988 XMM05=19e9129bd510f2350000000000131968 XMM06=0b18da37398b714200000000001307d0 XMM07=e042d86d42eb936e0000000000121d88 XMM08=ffad189489d2d1d3000000000011a2c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000