[ 23.774607] BUG: Bad rss-counter state mm:00000000a10bfa22 type:MM_FILEPAGES val:33 [ 23.775428] BUG: Bad rss-counter state mm:00000000a10bfa22 type:MM_ANONPAGES val:22 [ 23.932133] ================================================================== [ 23.933048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.934000] Read of size 8 at addr ffff88800efa1140 by task sshd/218 [ 23.934799] [ 23.935023] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.936020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.937001] Call Trace: [ 23.937330] [ 23.937616] dump_stack_lvl+0x91/0xf0 [ 23.938108] print_report+0xcc/0x620 [ 23.938605] ? __virt_addr_valid+0x102/0x340 [ 23.939188] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.939839] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.940501] kasan_report+0xbe/0xf0 [ 23.940993] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.941606] vma_interval_tree_remove+0xc75/0xec0 [ 23.942201] vma_prepare+0xc54/0x11a0 [ 23.942730] __split_vma+0x5af/0x950 [ 23.943211] ? __pfx___split_vma+0x10/0x10 [ 23.943760] ? find_held_lock+0x2c/0x110 [ 23.944287] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.944863] ? lock_is_held_type+0x9f/0x120 [ 23.945400] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.946004] ? mtree_range_walk+0x632/0x900 [ 23.946570] ? mas_walk+0x5c7/0x7c0 [ 23.947044] do_vmi_munmap+0x1f1/0x2b0 [ 23.947540] mmap_region+0x1f9/0x2660 [ 23.948033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.948555] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.949275] ? __pfx_lock_acquire+0x10/0x10 [ 23.949817] ? __pfx_mmap_region+0x10/0x10 [ 23.950355] ? security_mmap_addr+0x7d/0xa0 [ 23.950899] ? get_unmapped_area+0x1f5/0x3f0 [ 23.951449] do_mmap+0x854/0xf00 [ 23.951905] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.952418] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.952996] ksys_mmap_pgoff+0x3af/0x500 [ 23.953533] do_syscall_64+0x3f/0x90 [ 23.954028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.954696] RIP: 0033:0x7fb7cbc32d82 [ 23.955160] 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 [ 23.957369] RSP: 002b:00007ffd561c23b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.958298] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7cbc32d82 [ 23.959168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7cb06c000 [ 23.960051] RBP: 00007fb7cb06c000 R08: 0000000000000009 R09: 0000000000001000 [ 23.960930] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594fa272f70 [ 23.961801] R13: 00007ffd561c23d0 R14: 00007ffd561c2400 R15: 00007ffd561c2760 [ 23.962725] [ 23.963028] [ 23.963251] Allocated by task 211: [ 23.963702] kasan_save_stack+0x22/0x50 [ 23.964221] kasan_set_track+0x25/0x30 [ 23.964734] __kasan_slab_alloc+0x59/0x70 [ 23.965281] kmem_cache_alloc+0x16b/0x370 [ 23.965817] vm_area_dup+0x20/0x160 [ 23.966292] __split_vma+0x170/0x950 [ 23.966782] split_vma+0xc6/0x110 [ 23.967231] mprotect_fixup+0x8d2/0xb30 [ 23.967775] do_mprotect_pkey+0x87e/0xd40 [ 23.968321] __x64_sys_mprotect+0x78/0xc0 [ 23.968864] do_syscall_64+0x3f/0x90 [ 23.969353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.970024] [ 23.970246] Freed by task 211: [ 23.970649] kasan_save_stack+0x22/0x50 [ 23.971167] kasan_set_track+0x25/0x30 [ 23.971690] kasan_save_free_info+0x2b/0x50 [ 23.972239] __kasan_slab_free+0x10a/0x190 [ 23.972798] kmem_cache_free+0x10d/0x4d0 [ 23.973327] rcu_core+0x8c8/0x2860 [ 23.973779] __do_softirq+0x1b7/0x7d4 [ 23.974267] [ 23.974490] Last potentially related work creation: [ 23.975101] kasan_save_stack+0x22/0x50 [ 23.975626] __kasan_record_aux_stack+0x8e/0xa0 [ 23.976249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.976915] remove_vma+0x139/0x170 [ 23.977380] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.977960] do_vmi_munmap+0x1f1/0x2b0 [ 23.978460] __vm_munmap+0x138/0x3a0 [ 23.978940] __x64_sys_munmap+0x59/0x80 [ 23.979458] do_syscall_64+0x3f/0x90 [ 23.979960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.980635] [ 23.980859] Second to last potentially related work creation: [ 23.981579] kasan_save_stack+0x22/0x50 [ 23.982101] __kasan_record_aux_stack+0x8e/0xa0 [ 23.982703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.983369] remove_vma+0x139/0x170 [ 23.983842] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.984418] do_vmi_munmap+0x1f1/0x2b0 [ 23.984924] mmap_region+0x1f9/0x2660 [ 23.985416] do_mmap+0x854/0xf00 [ 23.985866] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.986370] ksys_mmap_pgoff+0x7d/0x500 [ 23.986878] do_syscall_64+0x3f/0x90 [ 23.987369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.988063] [ 23.988285] The buggy address belongs to the object at ffff88800efa10e8 [ 23.988285] which belongs to the cache vm_area_struct of size 168 [ 23.989827] The buggy address is located 88 bytes inside of [ 23.989827] freed 168-byte region [ffff88800efa10e8, ffff88800efa1190) [ 23.991292] [ 23.991516] The buggy address belongs to the physical page: [ 23.992213] page:0000000085e52bb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefa1 [ 23.993337] memcg:ffff88800e86a201 [ 23.993783] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.994513] page_type: 0xffffffff() [ 23.994976] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.995920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e86a201 [ 23.996882] page dumped because: kasan: bad access detected [ 23.997577] [ 23.997802] Memory state around the buggy address: [ 23.998408] ffff88800efa1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.999302] ffff88800efa1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.000207] >ffff88800efa1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.001086] ^ [ 24.001757] ffff88800efa1180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.002660] ffff88800efa1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.003513] ================================================================== [ 24.004571] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.831284] BUG: Bad rss-counter state mm:00000000be62f768 type:MM_FILEPAGES val:33 [ 25.832375] BUG: Bad rss-counter state mm:00000000be62f768 type:MM_ANONPAGES val:22 [ 26.241422] BUG: Bad rss-counter state mm:000000004ad7d5c0 type:MM_FILEPAGES val:33 [ 26.242659] BUG: Bad rss-counter state mm:000000004ad7d5c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32473' (ECDSA) to the list of known hosts. 2023/06/21 03:34:36 fuzzer started 2023/06/21 03:34:36 dialing manager at localhost:36067 2023/06/21 03:34:36 checking machine... 2023/06/21 03:34:36 checking revisions... [ 26.862621] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:34:36 testing simple program... [ 26.922107] cgroup: Unknown subsys name 'net' [ 26.976484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:34:36 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=00007f7afed41000 CR3=000000000d832000 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=f3e66e8c0030128de741f931970eb886 XMM02=ec2efd57dc4c00df0000000000120198 XMM03=258b6dd214a07a030000000000120268 XMM04=974932e2ecd69c3700000000000ae988 XMM05=751b9502027dc0b90000000000133708 XMM06=3fa76950ce7db3bf00000000001328e0 XMM07=e042d86d42eb936e0000000000122b50 XMM08=258b6dd214a07a030000000000120268 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffd4000037651 RSI=ffffffff81765099 RDI=ffffea00001bb288 RBP=ffffea00001bb280 RSP=ffff8880176d7918 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00001bb280 R13=ffff88801677d0e8 R14=ffff88800e28c9b0 R15=dffffc0000000000 RIP=ffffffff817650b2 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 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=00007f6a50192514 CR3=000000000ec8a000 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=00000000000100000000000100000000 XMM02=00007f6a5052b00000007f6a5052c8c0 XMM03=00007f6a50d6a51000007f6a50124000 XMM04=00007f6a50d6a51000007f6a50124000 XMM05=00007f6a5052b00000007f6a5052c8c0 XMM06=00007f6a5052c2f000007f6a50691950 XMM07=00007f6a5052bcf000007f6a5052b760 XMM08=00007f6a5052b00000007f6a50691950 XMM09=00000000000000000000ff0000000000 XMM10=00000000000000000000200000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000