[ 30.818774] BUG: Bad rss-counter state mm:0000000043699837 type:MM_FILEPAGES val:33 [ 30.820001] BUG: Bad rss-counter state mm:0000000043699837 type:MM_ANONPAGES val:22 [ 30.857413] ================================================================== [ 30.858302] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.859235] Read of size 8 at addr ffff88801bc1a4e0 by task sshd/218 [ 30.859992] [ 30.860215] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.861077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862044] Call Trace: [ 30.862360] [ 30.862641] dump_stack_lvl+0x91/0xf0 [ 30.863125] print_report+0xcc/0x620 [ 30.863605] ? __virt_addr_valid+0x102/0x340 [ 30.864179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864788] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865401] kasan_report+0xbe/0xf0 [ 30.865871] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866489] vma_interval_tree_remove+0xc75/0xec0 [ 30.867082] vma_prepare+0xc54/0x11a0 [ 30.867561] __split_vma+0x5af/0x950 [ 30.868028] ? __pfx___split_vma+0x10/0x10 [ 30.868563] ? find_held_lock+0x2c/0x110 [ 30.869082] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.869640] ? lock_is_held_type+0x9f/0x120 [ 30.870176] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.870780] ? mtree_range_walk+0x632/0x900 [ 30.871326] ? mas_walk+0x5c7/0x7c0 [ 30.871802] do_vmi_munmap+0x1f1/0x2b0 [ 30.872306] mmap_region+0x1f9/0x2660 [ 30.872785] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.873294] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.874006] ? __pfx_lock_acquire+0x10/0x10 [ 30.874544] ? __pfx_mmap_region+0x10/0x10 [ 30.875075] ? security_mmap_addr+0x7d/0xa0 [ 30.875609] ? get_unmapped_area+0x1f5/0x3f0 [ 30.876169] do_mmap+0x854/0xf00 [ 30.876604] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.877094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.877658] ksys_mmap_pgoff+0x3af/0x500 [ 30.878158] do_syscall_64+0x3f/0x90 [ 30.878636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879279] RIP: 0033:0x7f3cc4e73d82 [ 30.879734] 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 [ 30.881865] RSP: 002b:00007ffd73a380a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.882771] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cc4e73d82 [ 30.883620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cc42ad000 [ 30.884469] RBP: 00007f3cc42ad000 R08: 0000000000000009 R09: 0000000000001000 [ 30.885424] R10: 0000000000000812 R11: 0000000000000206 R12: 000055571d8beec0 [ 30.886268] R13: 00007ffd73a380c0 R14: 00007ffd73a380f0 R15: 00007ffd73a38450 [ 30.887131] [ 30.887422] [ 30.887635] Allocated by task 208: [ 30.888065] kasan_save_stack+0x22/0x50 [ 30.888586] kasan_set_track+0x25/0x30 [ 30.889078] __kasan_slab_alloc+0x59/0x70 [ 30.889599] kmem_cache_alloc+0x16b/0x370 [ 30.890106] vm_area_dup+0x20/0x160 [ 30.890558] __split_vma+0x170/0x950 [ 30.891022] split_vma+0xc6/0x110 [ 30.891461] mprotect_fixup+0x8d2/0xb30 [ 30.891959] do_mprotect_pkey+0x87e/0xd40 [ 30.892495] __x64_sys_mprotect+0x78/0xc0 [ 30.893011] do_syscall_64+0x3f/0x90 [ 30.893485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894126] [ 30.894340] Freed by task 208: [ 30.894725] kasan_save_stack+0x22/0x50 [ 30.895220] kasan_set_track+0x25/0x30 [ 30.895713] kasan_save_free_info+0x2b/0x50 [ 30.896254] __kasan_slab_free+0x10a/0x190 [ 30.896781] kmem_cache_free+0x10d/0x4d0 [ 30.897284] rcu_core+0x8c8/0x2860 [ 30.897725] __do_softirq+0x1b7/0x7d4 [ 30.898198] [ 30.898411] Last potentially related work creation: [ 30.898993] kasan_save_stack+0x22/0x50 [ 30.899497] __kasan_record_aux_stack+0x8e/0xa0 [ 30.900066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.900725] remove_vma+0x139/0x170 [ 30.901173] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.901722] do_vmi_munmap+0x1f1/0x2b0 [ 30.902203] __vm_munmap+0x138/0x3a0 [ 30.902664] __x64_sys_munmap+0x59/0x80 [ 30.903154] do_syscall_64+0x3f/0x90 [ 30.903624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904271] [ 30.904485] The buggy address belongs to the object at ffff88801bc1a488 [ 30.904485] which belongs to the cache vm_area_struct of size 168 [ 30.905943] The buggy address is located 88 bytes inside of [ 30.905943] freed 168-byte region [ffff88801bc1a488, ffff88801bc1a530) [ 30.907334] [ 30.907547] The buggy address belongs to the physical page: [ 30.908213] page:00000000e33f29c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc1a [ 30.909294] memcg:ffff88801a3f7c01 [ 30.909718] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.910362] page_type: 0xffffffff() [ 30.910805] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.911719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3f7c01 [ 30.912627] page dumped because: kasan: bad access detected [ 30.913271] [ 30.913483] Memory state around the buggy address: [ 30.914051] ffff88801bc1a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.914895] ffff88801bc1a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.915733] >ffff88801bc1a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.916586] ^ [ 30.917333] ffff88801bc1a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.918172] ffff88801bc1a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.919008] ================================================================== [ 30.920024] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.262579] BUG: Bad rss-counter state mm:000000000c22b120 type:MM_FILEPAGES val:33 [ 33.263962] BUG: Bad rss-counter state mm:000000000c22b120 type:MM_ANONPAGES val:22 [ 33.843444] BUG: Bad rss-counter state mm:00000000672fde52 type:MM_FILEPAGES val:33 [ 33.844607] BUG: Bad rss-counter state mm:00000000672fde52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33579' (ECDSA) to the list of known hosts. 2023/06/19 21:09:34 fuzzer started 2023/06/19 21:09:34 dialing manager at localhost:44161 2023/06/19 21:09:34 checking machine... 2023/06/19 21:09:34 checking revisions... [ 34.485853] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:09:34 testing simple program... [ 34.541131] cgroup: Unknown subsys name 'net' [ 34.632328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:09:27 Registers: info registers vcpu 0 RAX=fffffbfff0ac57a8 RBX=ffffffff8562bd40 RCX=ffffffff812e00d6 RDX=0000000000000001 RSI=0000000000000004 RDI=ffffffff8562bd40 RBP=fffffbfff0ac57a8 RSP=ffff88806ce09538 R8 =0000000000000001 R9 =fffffbfff0ac57a8 R10=ffffffff8562bd43 R11=0000000000000000 R12=ffffffff8562bd48 R13=ffffffff8562bd50 R14=ffff88806ce09928 R15=dffffc0000000000 RIP=ffffffff8180ef1a RFL=00000082 [--S----] 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=00007f2a0fd5b000 CR3=000000000d788000 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=1f9eaa4ab814acb6ce4b8a92e0b9e5f4 XMM02=ec2efd57dc4c00df000000000011eb58 XMM03=72813f51c2a1f3e3000000000011ec28 XMM04=5992cb697ff2da2600000000000ae988 XMM05=fd5764756f0baca70000000000135e58 XMM06=bdf2e299e47b49d500000000001348d8 XMM07=fb795ef6d65770560000000000124170 XMM08=2c67c8bc2e329bc3000000000011ebc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e93f560 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf0a001 RSI=ffff88806cf09ff8 RDI=ffff88806cf09ff8 RBP=ffff88806cf09b00 RSP=ffff88806cf09a38 R8 =ffffffff8609fa48 R9 =ffff88806cf09ae8 R10=0000000000038001 R11=000000000000790e R12=ffff88806cf09b08 R13=ffff88806cf09af0 R14=ffff88806cf09ff8 R15=ffff88806cf09aa8 RIP=ffffffff81130df7 RFL=00000202 [-------] 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 00007f59b136d900 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=00007f59b1924618 CR3=000000000ea88000 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