[ 24.271010] BUG: Bad rss-counter state mm:000000001cf818ab type:MM_FILEPAGES val:33 [ 24.272263] BUG: Bad rss-counter state mm:000000001cf818ab type:MM_ANONPAGES val:22 [ 24.308519] ================================================================== [ 24.309549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.310604] Read of size 8 at addr ffff88801bcd84e0 by task sshd/220 [ 24.311539] [ 24.311758] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.312852] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.313938] Call Trace: [ 24.314312] [ 24.314701] dump_stack_lvl+0x91/0xf0 [ 24.315207] print_report+0xcc/0x620 [ 24.315691] ? __virt_addr_valid+0x102/0x340 [ 24.316258] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.316876] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.317642] kasan_report+0xbe/0xf0 [ 24.318173] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.318798] vma_interval_tree_remove+0xc75/0xec0 [ 24.319528] vma_prepare+0xc54/0x11a0 [ 24.320164] __split_vma+0x5af/0x950 [ 24.320649] ? __pfx___split_vma+0x10/0x10 [ 24.321224] ? find_held_lock+0x2c/0x110 [ 24.321807] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.322386] ? lock_is_held_type+0x9f/0x120 [ 24.323039] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.323806] ? mtree_range_walk+0x632/0x900 [ 24.324486] ? mas_walk+0x5c7/0x7c0 [ 24.324972] do_vmi_munmap+0x1f1/0x2b0 [ 24.325477] mmap_region+0x1f9/0x2660 [ 24.325967] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.326481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.327204] ? __pfx_lock_acquire+0x10/0x10 [ 24.327739] ? __pfx_mmap_region+0x10/0x10 [ 24.328286] ? security_mmap_addr+0x7d/0xa0 [ 24.328829] ? get_unmapped_area+0x1f5/0x3f0 [ 24.329396] do_mmap+0x854/0xf00 [ 24.329838] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.330335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.330899] ksys_mmap_pgoff+0x3af/0x500 [ 24.331415] do_syscall_64+0x3f/0x90 [ 24.331899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.332584] RIP: 0033:0x7f8b37103d82 [ 24.333044] 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 [ 24.335169] RSP: 002b:00007ffed13d9038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.336086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b37103d82 [ 24.337148] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b3653d000 [ 24.337999] RBP: 00007f8b3653d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.338848] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556241178ec0 [ 24.339706] R13: 00007ffed13d9050 R14: 00007ffed13d9080 R15: 00007ffed13d93e0 [ 24.340595] [ 24.340887] [ 24.341109] Allocated by task 210: [ 24.341541] kasan_save_stack+0x22/0x50 [ 24.342048] kasan_set_track+0x25/0x30 [ 24.342547] __kasan_slab_alloc+0x59/0x70 [ 24.343082] kmem_cache_alloc+0x16b/0x370 [ 24.343607] vm_area_dup+0x20/0x160 [ 24.344070] __split_vma+0x170/0x950 [ 24.344539] split_vma+0xc6/0x110 [ 24.344981] mprotect_fixup+0x8d2/0xb30 [ 24.345489] do_mprotect_pkey+0x87e/0xd40 [ 24.346010] __x64_sys_mprotect+0x78/0xc0 [ 24.346529] do_syscall_64+0x3f/0x90 [ 24.347011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.347655] [ 24.347869] Freed by task 210: [ 24.348267] kasan_save_stack+0x22/0x50 [ 24.348774] kasan_set_track+0x25/0x30 [ 24.349282] kasan_save_free_info+0x2b/0x50 [ 24.349827] __kasan_slab_free+0x10a/0x190 [ 24.350361] kmem_cache_free+0x10d/0x4d0 [ 24.350874] rcu_core+0x8c8/0x2860 [ 24.351316] __do_softirq+0x1b7/0x7d4 [ 24.351797] [ 24.352034] Last potentially related work creation: [ 24.352622] kasan_save_stack+0x22/0x50 [ 24.353130] __kasan_record_aux_stack+0x8e/0xa0 [ 24.353703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.354352] remove_vma+0x139/0x170 [ 24.354799] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.355365] do_vmi_munmap+0x1f1/0x2b0 [ 24.355853] __vm_munmap+0x138/0x3a0 [ 24.356329] __x64_sys_munmap+0x59/0x80 [ 24.356828] do_syscall_64+0x3f/0x90 [ 24.357311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.357956] [ 24.358174] The buggy address belongs to the object at ffff88801bcd8488 [ 24.358174] which belongs to the cache vm_area_struct of size 168 [ 24.359640] The buggy address is located 88 bytes inside of [ 24.359640] freed 168-byte region [ffff88801bcd8488, ffff88801bcd8530) [ 24.361065] [ 24.361281] The buggy address belongs to the physical page: [ 24.362005] page:0000000094ea114e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bcd8 [ 24.363114] memcg:ffff88801bcd6101 [ 24.363547] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.364195] page_type: 0xffffffff() [ 24.364651] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.365581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bcd6101 [ 24.366501] page dumped because: kasan: bad access detected [ 24.367156] [ 24.367366] Memory state around the buggy address: [ 24.367964] ffff88801bcd8380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.368809] ffff88801bcd8400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.369658] >ffff88801bcd8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.370504] ^ [ 24.371255] ffff88801bcd8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.372126] ffff88801bcd8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.372966] ================================================================== [ 24.373910] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.868073] BUG: Bad rss-counter state mm:000000000d8b000f type:MM_FILEPAGES val:33 [ 26.869265] BUG: Bad rss-counter state mm:000000000d8b000f type:MM_ANONPAGES val:22 [ 27.425487] BUG: Bad rss-counter state mm:000000006b0546fe type:MM_FILEPAGES val:33 [ 27.426624] BUG: Bad rss-counter state mm:000000006b0546fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12169' (ECDSA) to the list of known hosts. 2023/06/20 20:47:49 fuzzer started 2023/06/20 20:47:49 dialing manager at localhost:36067 2023/06/20 20:47:49 checking machine... 2023/06/20 20:47:49 checking revisions... [ 28.142342] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:47:49 testing simple program... [ 28.194744] cgroup: Unknown subsys name 'net' [ 28.233670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:47:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fff3a0f7d68 CR3=0000000016ff6000 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=2038343a37343a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37343a3032203032 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffffffff8161a62a RDI=0000000000000001 RBP=ffffffff848cee00 RSP=ffff888008e07e18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff888008c04400 R12=0000000000000001 R13=0000000000000000 R14=000000000001d8ac R15=0000000000000000 RIP=ffffffff8135b935 RFL=00000093 [--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 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=00007f7c55babc58 CR3=000000000cbc6000 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=eee5556dde543980a242f4a3bcbd045f XMM02=ec2efd57dc4c00df000000000011a698 XMM03=78d1176b08c39a85000000000011a768 XMM04=6bb82667c0077c1000000000000ae988 XMM05=19e9129bd510f2350000000000130f68 XMM06=0119813b91fa06530000000000130140 XMM07=e042d86d42eb936e0000000000120ec8 XMM08=78d1176b08c39a85000000000011a768 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000