[ 42.079801] BUG: Bad rss-counter state mm:00000000fe100c2b type:MM_FILEPAGES val:33 [ 42.081201] BUG: Bad rss-counter state mm:00000000fe100c2b type:MM_ANONPAGES val:22 [ 42.231606] ================================================================== [ 42.232628] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.233647] Read of size 8 at addr ffff88800e444140 by task sshd/218 [ 42.234556] [ 42.234852] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.235795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.236896] Call Trace: [ 42.237247] [ 42.237573] dump_stack_lvl+0x91/0xf0 [ 42.238111] print_report+0xcc/0x620 [ 42.238649] ? __virt_addr_valid+0x102/0x340 [ 42.239256] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.239922] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.240584] kasan_report+0xbe/0xf0 [ 42.241094] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.241792] vma_interval_tree_remove+0xc75/0xec0 [ 42.242460] vma_prepare+0xc54/0x11a0 [ 42.242993] __split_vma+0x5af/0x950 [ 42.243512] ? __pfx___split_vma+0x10/0x10 [ 42.244099] ? find_held_lock+0x2c/0x110 [ 42.244683] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.245307] ? lock_is_held_type+0x9f/0x120 [ 42.245922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.246596] ? mtree_range_walk+0x632/0x900 [ 42.247209] ? mas_walk+0x5c7/0x7c0 [ 42.247730] do_vmi_munmap+0x1f1/0x2b0 [ 42.248279] mmap_region+0x1f9/0x2660 [ 42.248811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.249366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.250159] ? __pfx_lock_acquire+0x10/0x10 [ 42.250756] ? __pfx_mmap_region+0x10/0x10 [ 42.251335] ? security_mmap_addr+0x7d/0xa0 [ 42.251920] ? get_unmapped_area+0x1f5/0x3f0 [ 42.252530] do_mmap+0x854/0xf00 [ 42.253014] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.253582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.254207] ksys_mmap_pgoff+0x3af/0x500 [ 42.254765] do_syscall_64+0x3f/0x90 [ 42.255293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.256009] RIP: 0033:0x7f256b153d82 [ 42.256514] 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 [ 42.258855] RSP: 002b:00007fffc25440c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.259859] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f256b153d82 [ 42.260804] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f256a58d000 [ 42.261746] RBP: 00007f256a58d000 R08: 0000000000000009 R09: 0000000000001000 [ 42.262688] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e31bd1ec0 [ 42.263628] R13: 00007fffc25440e0 R14: 00007fffc2544110 R15: 00007fffc2544470 [ 42.264573] [ 42.264888] [ 42.265123] Allocated by task 211: [ 42.265613] kasan_save_stack+0x22/0x50 [ 42.266163] kasan_set_track+0x25/0x30 [ 42.266709] __kasan_slab_alloc+0x59/0x70 [ 42.267297] kmem_cache_alloc+0x16b/0x370 [ 42.267869] vm_area_dup+0x20/0x160 [ 42.268371] __split_vma+0x170/0x950 [ 42.268882] split_vma+0xc6/0x110 [ 42.269368] mprotect_fixup+0x8d2/0xb30 [ 42.269930] do_mprotect_pkey+0x87e/0xd40 [ 42.270508] __x64_sys_mprotect+0x78/0xc0 [ 42.271081] do_syscall_64+0x3f/0x90 [ 42.271604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.272319] [ 42.272556] Freed by task 202: [ 42.272985] kasan_save_stack+0x22/0x50 [ 42.273546] kasan_set_track+0x25/0x30 [ 42.274114] kasan_save_free_info+0x2b/0x50 [ 42.274706] __kasan_slab_free+0x10a/0x190 [ 42.275300] kmem_cache_free+0x10d/0x4d0 [ 42.275863] rcu_core+0x8c8/0x2860 [ 42.276356] __do_softirq+0x1b7/0x7d4 [ 42.276884] [ 42.277119] Last potentially related work creation: [ 42.277773] kasan_save_stack+0x22/0x50 [ 42.278333] __kasan_record_aux_stack+0x8e/0xa0 [ 42.278961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.279677] remove_vma+0x139/0x170 [ 42.280177] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.280790] do_vmi_munmap+0x1f1/0x2b0 [ 42.281323] __vm_munmap+0x138/0x3a0 [ 42.281847] __x64_sys_munmap+0x59/0x80 [ 42.282400] do_syscall_64+0x3f/0x90 [ 42.282922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.283630] [ 42.283870] The buggy address belongs to the object at ffff88800e4440e8 [ 42.283870] which belongs to the cache vm_area_struct of size 168 [ 42.285495] The buggy address is located 88 bytes inside of [ 42.285495] freed 168-byte region [ffff88800e4440e8, ffff88800e444190) [ 42.287057] [ 42.287293] The buggy address belongs to the physical page: [ 42.288024] page:00000000612736a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe444 [ 42.289222] memcg:ffff88800deec401 [ 42.289700] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.290477] page_type: 0xffffffff() [ 42.290976] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 42.291993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deec401 [ 42.292990] page dumped because: kasan: bad access detected [ 42.293729] [ 42.293969] Memory state around the buggy address: [ 42.294601] ffff88800e444000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.295538] ffff88800e444080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 42.296472] >ffff88800e444100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.297405] ^ [ 42.298125] ffff88800e444180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 42.299084] ffff88800e444200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 42.300021] ================================================================== [ 42.301379] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.298710] BUG: Bad rss-counter state mm:00000000e7542b35 type:MM_FILEPAGES val:33 [ 44.299927] BUG: Bad rss-counter state mm:00000000e7542b35 type:MM_ANONPAGES val:22 [ 44.737711] BUG: Bad rss-counter state mm:0000000049f987b5 type:MM_FILEPAGES val:33 [ 44.739295] BUG: Bad rss-counter state mm:0000000049f987b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51940' (ECDSA) to the list of known hosts. 2023/06/19 22:45:48 fuzzer started 2023/06/19 22:45:49 dialing manager at localhost:44161 2023/06/19 22:45:49 checking machine... 2023/06/19 22:45:49 checking revisions... [ 45.507524] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:45:49 testing simple program... [ 45.548454] cgroup: Unknown subsys name 'net' [ 45.675034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:45:31 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff1100340feef RSP=ffff88801a07f770 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000283 R13=ffffea0000666b40 R14=ffffffff81c63f2c R15=0000000000000000 RIP=ffffffff812e004a 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 00007ff987fff700 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=00007f75a998f360 CR3=0000000017848000 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=2038343a35343a3232203931206e754a XMM01=6964206465766965636552203a5d3732 XMM02=6f63736964203a31313a363139303620 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a35343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=ffff888008c48000 RSI=ffffffff818d5e10 RDI=ffffffff818d5e15 RBP=dffffc0000000000 RSP=ffff8880087ff7a8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=00000000000b6996 R12=0000000000000034 R13=ffff8880198cdc78 R14=ffffffff87f31880 R15=00000000faaaaec8 RIP=ffffffff8153434d 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 00007fe64f2fe900 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=000055ac63007038 CR3=000000000cc8e000 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=ff0000ffff0000000000000000000000 XMM02=69767265732e6c6c696b66722d646d65 XMM03=00656369767265732e6c6c696b66722d XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=000055ac63024a500000000000000000 XMM06=00000000000003710000000000000000 XMM07=00000000000000000000000000000000 XMM08=7368746150796c6e4f64616552646e69 XMM09=00000000000000000000000000000000 XMM10=00000000002020202020200000002000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000