syzkaller login: [ 35.549565] BUG: Bad rss-counter state mm:00000000dab0642c type:MM_FILEPAGES val:33 [ 35.550304] BUG: Bad rss-counter state mm:00000000dab0642c type:MM_ANONPAGES val:22 [ 35.581156] ================================================================== [ 35.581916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.582667] Read of size 8 at addr ffff888019077798 by task sshd/220 [ 35.583284] [ 35.583461] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.584118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.584793] Call Trace: [ 35.585038] [ 35.585574] dump_stack_lvl+0x91/0xf0 [ 35.586027] print_report+0xcc/0x620 [ 35.586357] ? __virt_addr_valid+0x102/0x340 [ 35.586728] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.587144] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.587567] kasan_report+0xbe/0xf0 [ 35.587887] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.588350] vma_interval_tree_remove+0xc75/0xec0 [ 35.588791] vma_prepare+0xc54/0x11a0 [ 35.589133] __split_vma+0x5af/0x950 [ 35.589480] ? __pfx___split_vma+0x10/0x10 [ 35.589834] ? find_held_lock+0x2c/0x110 [ 35.590198] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.590632] ? lock_is_held_type+0x9f/0x120 [ 35.591020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.591427] ? mtree_range_walk+0x632/0x900 [ 35.591806] ? mas_walk+0x5c7/0x7c0 [ 35.592134] do_vmi_munmap+0x1f1/0x2b0 [ 35.592544] mmap_region+0x1f9/0x2660 [ 35.592874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.593235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.593762] ? __pfx_lock_acquire+0x10/0x10 [ 35.594125] ? __pfx_mmap_region+0x10/0x10 [ 35.594489] ? security_mmap_addr+0x7d/0xa0 [ 35.594868] ? get_unmapped_area+0x1f5/0x3f0 [ 35.595240] do_mmap+0x854/0xf00 [ 35.595544] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.595880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.596281] ksys_mmap_pgoff+0x3af/0x500 [ 35.596628] do_syscall_64+0x3f/0x90 [ 35.596959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.597433] RIP: 0033:0x7f986d152d82 [ 35.597805] 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 [ 35.599301] RSP: 002b:00007fffc674d6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.600047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f986d152d82 [ 35.600664] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f986c58c000 [ 35.601237] RBP: 00007f986c58c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.601847] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573e665aec0 [ 35.602441] R13: 00007fffc674d6c0 R14: 00007fffc674d6f0 R15: 00007fffc674da50 [ 35.603045] [ 35.603250] [ 35.603399] Allocated by task 213: [ 35.603707] kasan_save_stack+0x22/0x50 [ 35.604054] kasan_set_track+0x25/0x30 [ 35.604423] __kasan_slab_alloc+0x59/0x70 [ 35.604789] kmem_cache_alloc+0x16b/0x370 [ 35.605153] vm_area_dup+0x20/0x160 [ 35.605474] __split_vma+0x170/0x950 [ 35.605806] split_vma+0xc6/0x110 [ 35.606113] mprotect_fixup+0x8d2/0xb30 [ 35.606463] do_mprotect_pkey+0x87e/0xd40 [ 35.606825] __x64_sys_mprotect+0x78/0xc0 [ 35.607175] do_syscall_64+0x3f/0x90 [ 35.607502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.607944] [ 35.608092] Freed by task 213: [ 35.608409] kasan_save_stack+0x22/0x50 [ 35.608768] kasan_set_track+0x25/0x30 [ 35.609115] kasan_save_free_info+0x2b/0x50 [ 35.609507] __kasan_slab_free+0x10a/0x190 [ 35.609869] kmem_cache_free+0x10d/0x4d0 [ 35.610213] rcu_core+0x8c8/0x2860 [ 35.610547] __do_softirq+0x1b7/0x7d4 [ 35.610873] [ 35.611019] Last potentially related work creation: [ 35.611452] kasan_save_stack+0x22/0x50 [ 35.611793] __kasan_record_aux_stack+0x8e/0xa0 [ 35.612179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.612715] remove_vma+0x139/0x170 [ 35.613030] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.613437] do_vmi_munmap+0x1f1/0x2b0 [ 35.613755] __vm_munmap+0x138/0x3a0 [ 35.614060] __x64_sys_munmap+0x59/0x80 [ 35.614384] do_syscall_64+0x3f/0x90 [ 35.614747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.615167] [ 35.615314] Second to last potentially related work creation: [ 35.615795] kasan_save_stack+0x22/0x50 [ 35.616166] __kasan_record_aux_stack+0x8e/0xa0 [ 35.616662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.617086] remove_vma+0x139/0x170 [ 35.617383] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.617793] do_vmi_munmap+0x1f1/0x2b0 [ 35.618121] mmap_region+0x1f9/0x2660 [ 35.618447] do_mmap+0x854/0xf00 [ 35.618721] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.619051] ksys_mmap_pgoff+0x3af/0x500 [ 35.619385] do_syscall_64+0x3f/0x90 [ 35.619714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.620263] [ 35.620459] The buggy address belongs to the object at ffff888019077740 [ 35.620459] which belongs to the cache vm_area_struct of size 168 [ 35.621476] The buggy address is located 88 bytes inside of [ 35.621476] freed 168-byte region [ffff888019077740, ffff8880190777e8) [ 35.622604] [ 35.622778] The buggy address belongs to the physical page: [ 35.623228] page:000000009887e116 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19077 [ 35.624015] memcg:ffff888017fe1501 [ 35.624354] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.624799] page_type: 0xffffffff() [ 35.625128] raw: 0100000000000200 ffff8880087a0c80 ffffea0000641fc0 dead000000000008 [ 35.625766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017fe1501 [ 35.626381] page dumped because: kasan: bad access detected [ 35.626834] [ 35.627004] Memory state around the buggy address: [ 35.627417] ffff888019077680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.627982] ffff888019077700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.628625] >ffff888019077780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.629220] ^ [ 35.629598] ffff888019077800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.630183] ffff888019077880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.630795] ================================================================== [ 35.631571] Disabling lock debugging due to kernel taint [ 37.067677] BUG: Bad rss-counter state mm:000000001b8ec81d type:MM_FILEPAGES val:33 [ 37.068450] BUG: Bad rss-counter state mm:000000001b8ec81d type:MM_ANONPAGES val:22 [ 37.513862] BUG: Bad rss-counter state mm:000000002296bb47 type:MM_FILEPAGES val:33 [ 37.514632] BUG: Bad rss-counter state mm:000000002296bb47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6656' (ECDSA) to the list of known hosts. 2023/06/21 09:27:35 fuzzer started 2023/06/21 09:27:35 dialing manager at localhost:36067 2023/06/21 09:27:35 checking machine... 2023/06/21 09:27:35 checking revisions... [ 38.041919] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:27:35 testing simple program... [ 38.089676] cgroup: Unknown subsys name 'net' [ 38.122334] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:27:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86607973 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff86607973 RSP=ffff88806ce09a60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e5c3410 RIP=ffffffff811fc7be RFL=00000296 [--S-AP-] 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 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=00007ffe9413f698 CR3=00000000096ba000 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=2034333a37323a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a37323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007fc80125c000 RCX=ffffffff81007b82 RDX=ffff888019bbd1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff8880102378b0 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fc80125c000 R11=00000000000b6a61 R12=ffff8880102379f8 R13=0000000000000000 R14=ffff888019bbd1c0 R15=ffff88800f0e6d00 RIP=ffffffff814c086b RFL=00000207 [-----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 00007fc800d75900 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=00007fc80132c618 CR3=000000000f0ce000 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