[ 24.998135] BUG: Bad rss-counter state mm:00000000d2b09d23 type:MM_FILEPAGES val:33 [ 25.000117] BUG: Bad rss-counter state mm:00000000d2b09d23 type:MM_ANONPAGES val:22 [ 25.173829] ================================================================== [ 25.174728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.175694] Read of size 8 at addr ffff88800f176880 by task sshd/219 [ 25.176447] [ 25.176662] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.177621] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.178585] Call Trace: [ 25.178913] [ 25.179198] dump_stack_lvl+0x91/0xf0 [ 25.179683] print_report+0xcc/0x620 [ 25.180166] ? __virt_addr_valid+0x102/0x340 [ 25.180710] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.181324] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.181928] kasan_report+0xbe/0xf0 [ 25.182404] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.183027] vma_interval_tree_remove+0xc75/0xec0 [ 25.183622] vma_prepare+0xc54/0x11a0 [ 25.184094] __split_vma+0x5af/0x950 [ 25.184560] ? __pfx___split_vma+0x10/0x10 [ 25.185086] ? find_held_lock+0x2c/0x110 [ 25.185606] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.186167] ? lock_is_held_type+0x9f/0x120 [ 25.186703] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.187325] ? mtree_range_walk+0x632/0x900 [ 25.187872] ? mas_walk+0x5c7/0x7c0 [ 25.188344] do_vmi_munmap+0x1f1/0x2b0 [ 25.188833] mmap_region+0x1f9/0x2660 [ 25.189304] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.189811] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.190518] ? __pfx_lock_acquire+0x10/0x10 [ 25.191052] ? __pfx_mmap_region+0x10/0x10 [ 25.191581] ? security_mmap_addr+0x7d/0xa0 [ 25.192106] ? get_unmapped_area+0x1f5/0x3f0 [ 25.192646] do_mmap+0x854/0xf00 [ 25.193081] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.193571] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.194126] ksys_mmap_pgoff+0x3af/0x500 [ 25.194630] do_syscall_64+0x3f/0x90 [ 25.195118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.195766] RIP: 0033:0x7f2662160d82 [ 25.196215] 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 [ 25.198315] RSP: 002b:00007fff559209b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.199213] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2662160d82 [ 25.200053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f266159a000 [ 25.200885] RBP: 00007f266159a000 R08: 0000000000000009 R09: 0000000000001000 [ 25.201726] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b23011ec0 [ 25.202567] R13: 00007fff559209d0 R14: 00007fff55920a00 R15: 00007fff55920d60 [ 25.203422] [ 25.203716] [ 25.203930] Allocated by task 212: [ 25.204360] kasan_save_stack+0x22/0x50 [ 25.204861] kasan_set_track+0x25/0x30 [ 25.205350] __kasan_slab_alloc+0x59/0x70 [ 25.205876] kmem_cache_alloc+0x16b/0x370 [ 25.206389] vm_area_dup+0x20/0x160 [ 25.206837] __split_vma+0x170/0x950 [ 25.207313] split_vma+0xc6/0x110 [ 25.207748] mprotect_fixup+0x8d2/0xb30 [ 25.208247] do_mprotect_pkey+0x87e/0xd40 [ 25.208772] __x64_sys_mprotect+0x78/0xc0 [ 25.209292] do_syscall_64+0x3f/0x90 [ 25.209757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.210398] [ 25.210611] Freed by task 212: [ 25.211006] kasan_save_stack+0x22/0x50 [ 25.211516] kasan_set_track+0x25/0x30 [ 25.212002] kasan_save_free_info+0x2b/0x50 [ 25.212537] __kasan_slab_free+0x10a/0x190 [ 25.213064] kmem_cache_free+0x10d/0x4d0 [ 25.213570] rcu_core+0x8c8/0x2860 [ 25.214007] __do_softirq+0x1b7/0x7d4 [ 25.214480] [ 25.214694] Last potentially related work creation: [ 25.215282] kasan_save_stack+0x22/0x50 [ 25.215784] __kasan_record_aux_stack+0x8e/0xa0 [ 25.216365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.217035] remove_vma+0x139/0x170 [ 25.217494] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.218066] do_vmi_munmap+0x1f1/0x2b0 [ 25.218564] __vm_munmap+0x138/0x3a0 [ 25.219084] __x64_sys_munmap+0x59/0x80 [ 25.219595] do_syscall_64+0x3f/0x90 [ 25.220081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.220744] [ 25.220968] Second to last potentially related work creation: [ 25.221671] kasan_save_stack+0x22/0x50 [ 25.222185] __kasan_record_aux_stack+0x8e/0xa0 [ 25.222771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.223438] remove_vma+0x139/0x170 [ 25.223905] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.224477] do_vmi_munmap+0x1f1/0x2b0 [ 25.224977] mmap_region+0x1f9/0x2660 [ 25.225469] do_mmap+0x854/0xf00 [ 25.225909] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.226409] ksys_mmap_pgoff+0x3af/0x500 [ 25.226928] do_syscall_64+0x3f/0x90 [ 25.227418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.228073] [ 25.228295] The buggy address belongs to the object at ffff88800f176828 [ 25.228295] which belongs to the cache vm_area_struct of size 168 [ 25.229803] The buggy address is located 88 bytes inside of [ 25.229803] freed 168-byte region [ffff88800f176828, ffff88800f1768d0) [ 25.231264] [ 25.231484] The buggy address belongs to the physical page: [ 25.232165] page:00000000fd945905 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf176 [ 25.233282] memcg:ffff88800da0f601 [ 25.233728] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.234445] page_type: 0xffffffff() [ 25.234921] raw: 0100000000000200 ffff88800879fc80 ffffea00003db9c0 dead000000000005 [ 25.235870] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da0f601 [ 25.236800] page dumped because: kasan: bad access detected [ 25.237486] [ 25.237709] Memory state around the buggy address: [ 25.238312] ffff88800f176780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 25.239211] ffff88800f176800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.240089] >ffff88800f176880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.240978] ^ [ 25.241403] ffff88800f176900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.242285] ffff88800f176980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 25.243178] ================================================================== [ 25.244264] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.441914] BUG: Bad rss-counter state mm:0000000092d36aed type:MM_FILEPAGES val:33 [ 27.442656] BUG: Bad rss-counter state mm:0000000092d36aed type:MM_ANONPAGES val:22 [ 27.875385] BUG: Bad rss-counter state mm:00000000aa63f3cb type:MM_FILEPAGES val:33 [ 27.876220] BUG: Bad rss-counter state mm:00000000aa63f3cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10964' (ECDSA) to the list of known hosts. 2023/06/19 22:03:27 fuzzer started 2023/06/19 22:03:27 dialing manager at localhost:44161 2023/06/19 22:03:27 checking machine... 2023/06/19 22:03:27 checking revisions... [ 28.518469] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:03:27 testing simple program... [ 28.561629] cgroup: Unknown subsys name 'net' [ 28.610722] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:26 Registers: info registers vcpu 0 RAX=ffffffff8185ae43 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015c673f8 RSI=ffffffff8185ae43 RDI=ffff888015c673b0 RBP=ffff888015c67408 RSP=ffff888015c67340 R8 =0000000000000001 R9 =ffff888015c673f0 R10=0000000000038001 R11=00000000000223ea R12=ffff888015c67478 R13=ffff888015c673f8 R14=ffff8880102c9b40 R15=ffff888015c673b0 RIP=ffffffff81130641 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 00007f672fb0c900 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=00007f672ef65130 CR3=000000000d8d8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=21c02e232ee33bdc00000000000ae988 XMM05=530fd3e72a333acd00000000001356d8 XMM06=dfcdbad4f1609c3700000000001341c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800c6e83c0 RCX=0000000000000000 RDX=ffff8880166851c0 RSI=ffffffff83676d6a RDI=ffff88800c6e83c0 RBP=ffffffff838631e0 RSP=ffff88801980fac8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800c6e8418 R13=ffff88800c6e83c0 R14=0000000000000090 R15=0000000000000001 RIP=ffffffff838631e0 RFL=00000293 [--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 00007fd41bea4900 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=00007ffcebc3f000 CR3=000000000c640000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000