[ 32.183638] BUG: Bad rss-counter state mm:000000003b91dff2 type:MM_FILEPAGES val:33 [ 32.184401] BUG: Bad rss-counter state mm:000000003b91dff2 type:MM_ANONPAGES val:22 [ 32.321706] ================================================================== [ 32.322438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.323110] Read of size 8 at addr ffff88800c7b3a50 by task sshd/220 [ 32.323674] [ 32.323830] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.324445] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.325136] Call Trace: [ 32.325380] [ 32.325686] dump_stack_lvl+0x91/0xf0 [ 32.326069] print_report+0xcc/0x620 [ 32.326421] ? __virt_addr_valid+0x102/0x340 [ 32.326829] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.327275] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.327753] kasan_report+0xbe/0xf0 [ 32.328106] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.328546] vma_interval_tree_remove+0xc75/0xec0 [ 32.328981] vma_prepare+0xc54/0x11a0 [ 32.329327] __split_vma+0x5af/0x950 [ 32.329661] ? __pfx___split_vma+0x10/0x10 [ 32.330070] ? find_held_lock+0x2c/0x110 [ 32.330446] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.330879] ? lock_is_held_type+0x9f/0x120 [ 32.331280] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.331719] ? mtree_range_walk+0x632/0x900 [ 32.332126] ? mas_walk+0x5c7/0x7c0 [ 32.332467] do_vmi_munmap+0x1f1/0x2b0 [ 32.332825] mmap_region+0x1f9/0x2660 [ 32.333166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.333538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.334086] ? __pfx_lock_acquire+0x10/0x10 [ 32.334477] ? __pfx_mmap_region+0x10/0x10 [ 32.334859] ? security_mmap_addr+0x7d/0xa0 [ 32.335249] ? get_unmapped_area+0x1f5/0x3f0 [ 32.335644] do_mmap+0x854/0xf00 [ 32.335943] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.336307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.336728] ksys_mmap_pgoff+0x3af/0x500 [ 32.337104] do_syscall_64+0x3f/0x90 [ 32.337459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.337957] RIP: 0033:0x7f785684dd82 [ 32.338311] 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 [ 32.339857] RSP: 002b:00007ffe5a278be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.340522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f785684dd82 [ 32.341161] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7855c87000 [ 32.341784] RBP: 00007f7855c87000 R08: 0000000000000009 R09: 0000000000001000 [ 32.342434] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d53faaf980 [ 32.343065] R13: 00007ffe5a278c00 R14: 00007ffe5a278c30 R15: 00007ffe5a278f90 [ 32.343684] [ 32.343895] [ 32.344050] Allocated by task 213: [ 32.344365] kasan_save_stack+0x22/0x50 [ 32.344746] kasan_set_track+0x25/0x30 [ 32.345112] __kasan_slab_alloc+0x59/0x70 [ 32.345489] kmem_cache_alloc+0x16b/0x370 [ 32.345865] vm_area_dup+0x20/0x160 [ 32.346216] __split_vma+0x170/0x950 [ 32.346563] split_vma+0xc6/0x110 [ 32.346886] mprotect_fixup+0x8d2/0xb30 [ 32.347245] do_mprotect_pkey+0x87e/0xd40 [ 32.347616] __x64_sys_mprotect+0x78/0xc0 [ 32.347992] do_syscall_64+0x3f/0x90 [ 32.348345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.348835] [ 32.348994] Freed by task 19: [ 32.349301] kasan_save_stack+0x22/0x50 [ 32.349662] kasan_set_track+0x25/0x30 [ 32.350045] kasan_save_free_info+0x2b/0x50 [ 32.350439] __kasan_slab_free+0x10a/0x190 [ 32.350817] kmem_cache_free+0x10d/0x4d0 [ 32.351181] rcu_core+0x8c8/0x2860 [ 32.351499] __do_softirq+0x1b7/0x7d4 [ 32.351849] [ 32.352003] Last potentially related work creation: [ 32.352440] kasan_save_stack+0x22/0x50 [ 32.352811] __kasan_record_aux_stack+0x8e/0xa0 [ 32.353233] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.353710] remove_vma+0x139/0x170 [ 32.354055] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.354495] do_vmi_munmap+0x1f1/0x2b0 [ 32.354873] __vm_munmap+0x138/0x3a0 [ 32.355216] __x64_sys_munmap+0x59/0x80 [ 32.355568] do_syscall_64+0x3f/0x90 [ 32.355909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.356376] [ 32.356537] Second to last potentially related work creation: [ 32.357037] kasan_save_stack+0x22/0x50 [ 32.357407] __kasan_record_aux_stack+0x8e/0xa0 [ 32.357837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.358318] remove_vma+0x139/0x170 [ 32.358644] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.359047] do_vmi_munmap+0x1f1/0x2b0 [ 32.359413] mmap_region+0x1f9/0x2660 [ 32.359756] do_mmap+0x854/0xf00 [ 32.360071] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.360443] ksys_mmap_pgoff+0x3af/0x500 [ 32.360846] do_syscall_64+0x3f/0x90 [ 32.361219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.361709] [ 32.361875] The buggy address belongs to the object at ffff88800c7b39f8 [ 32.361875] which belongs to the cache vm_area_struct of size 168 [ 32.362999] The buggy address is located 88 bytes inside of [ 32.362999] freed 168-byte region [ffff88800c7b39f8, ffff88800c7b3aa0) [ 32.364032] [ 32.364190] The buggy address belongs to the physical page: [ 32.364681] page:000000006a5c3e21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b3 [ 32.365503] memcg:ffff88800e2b8f01 [ 32.365824] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.366324] page_type: 0xffffffff() [ 32.366657] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 32.367314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2b8f01 [ 32.367989] page dumped because: kasan: bad access detected [ 32.368483] [ 32.368640] Memory state around the buggy address: [ 32.369067] ffff88800c7b3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.369693] ffff88800c7b3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.370357] >ffff88800c7b3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.370999] ^ [ 32.371516] ffff88800c7b3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.372150] ffff88800c7b3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.372824] ================================================================== [ 32.373666] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.928915] BUG: Bad rss-counter state mm:00000000da08b90c type:MM_FILEPAGES val:33 [ 33.929658] BUG: Bad rss-counter state mm:00000000da08b90c type:MM_ANONPAGES val:22 [ 34.310566] BUG: Bad rss-counter state mm:000000003e3abd1b type:MM_FILEPAGES val:33 [ 34.311340] BUG: Bad rss-counter state mm:000000003e3abd1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33006' (ECDSA) to the list of known hosts. 2023/06/21 09:08:31 fuzzer started 2023/06/21 09:08:31 dialing manager at localhost:36067 2023/06/21 09:08:31 checking machine... 2023/06/21 09:08:31 checking revisions... [ 34.900815] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:08:31 testing simple program... [ 34.941205] cgroup: Unknown subsys name 'net' [ 34.975820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:31 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=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=00007f9acec9e008 CR3=0000000016758000 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=2031333a38303a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a38303a3930203132 XMM08=732f646d65747379732f62696c2f223d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00007ffe8a2d98b8 RCX=00007f54df7263c3 RDX=00000000000001f4 RSI=0000000000000001 RDI=ffff88800fa17fc8 RBP=00007ffe8a2dbbe0 RSP=fffffe0000049ff8 R8 =00007ffe8a2d98ac R9 =000000000000000c R10=0000000000000000 R11=0000000000000246 R12=0000000000000008 R13=0000000000000050 R14=00007ffe8a2d98ac R15=00000000000000f4 RIP=ffffffff84600154 RFL=00000046 [---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 00007f54df23f900 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=00007ffe8a2da000 CR3=000000000e29a000 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=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