[ 26.497107] BUG: Bad rss-counter state mm:00000000678cbca5 type:MM_FILEPAGES val:33 [ 26.498545] BUG: Bad rss-counter state mm:00000000678cbca5 type:MM_ANONPAGES val:22 [ 26.624428] ================================================================== [ 26.625751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.627092] Read of size 8 at addr ffff88800fe6dd08 by task sshd/218 [ 26.628373] [ 26.628696] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.629573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.630464] Call Trace: [ 26.630744] [ 26.630994] dump_stack_lvl+0x91/0xf0 [ 26.631435] print_report+0xcc/0x620 [ 26.631871] ? __virt_addr_valid+0x102/0x340 [ 26.632366] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.632924] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.633476] kasan_report+0xbe/0xf0 [ 26.633896] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.634450] vma_interval_tree_remove+0xc75/0xec0 [ 26.634981] vma_prepare+0xc54/0x11a0 [ 26.635412] __split_vma+0x5af/0x950 [ 26.635832] ? __pfx___split_vma+0x10/0x10 [ 26.636300] ? find_held_lock+0x2c/0x110 [ 26.636761] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.637261] ? lock_is_held_type+0x9f/0x120 [ 26.637740] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.638280] ? mtree_range_walk+0x632/0x900 [ 26.638773] ? mas_walk+0x5c7/0x7c0 [ 26.639191] do_vmi_munmap+0x1f1/0x2b0 [ 26.639627] mmap_region+0x1f9/0x2660 [ 26.640075] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.640534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.641180] ? __pfx_lock_acquire+0x10/0x10 [ 26.641657] ? __pfx_mmap_region+0x10/0x10 [ 26.642132] ? security_mmap_addr+0x7d/0xa0 [ 26.642604] ? get_unmapped_area+0x1f5/0x3f0 [ 26.643081] do_mmap+0x854/0xf00 [ 26.643474] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.643910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.644404] ksys_mmap_pgoff+0x3af/0x500 [ 26.644849] do_syscall_64+0x3f/0x90 [ 26.645269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.645852] RIP: 0033:0x7f88ef9ccd82 [ 26.646260] 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 [ 26.648172] RSP: 002b:00007ffc27076b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.648989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88ef9ccd82 [ 26.649760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88eee06000 [ 26.650527] RBP: 00007f88eee06000 R08: 0000000000000009 R09: 0000000000001000 [ 26.651288] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565374847b20 [ 26.652064] R13: 00007ffc27076b90 R14: 00007ffc27076bc0 R15: 00007ffc27076f20 [ 26.652832] [ 26.653088] [ 26.653276] Allocated by task 211: [ 26.653668] kasan_save_stack+0x22/0x50 [ 26.654111] kasan_set_track+0x25/0x30 [ 26.654555] __kasan_slab_alloc+0x59/0x70 [ 26.655022] kmem_cache_alloc+0x16b/0x370 [ 26.655489] vm_area_dup+0x20/0x160 [ 26.655906] __split_vma+0x170/0x950 [ 26.656321] split_vma+0xc6/0x110 [ 26.656712] mprotect_fixup+0x8d2/0xb30 [ 26.657150] do_mprotect_pkey+0x87e/0xd40 [ 26.657609] __x64_sys_mprotect+0x78/0xc0 [ 26.658061] do_syscall_64+0x3f/0x90 [ 26.658476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.659041] [ 26.659230] Freed by task 211: [ 26.659579] kasan_save_stack+0x22/0x50 [ 26.660049] kasan_set_track+0x25/0x30 [ 26.660489] kasan_save_free_info+0x2b/0x50 [ 26.660956] __kasan_slab_free+0x10a/0x190 [ 26.661428] kmem_cache_free+0x10d/0x4d0 [ 26.661872] rcu_core+0x8c8/0x2860 [ 26.662267] __do_softirq+0x1b7/0x7d4 [ 26.662688] [ 26.662873] Last potentially related work creation: [ 26.663401] kasan_save_stack+0x22/0x50 [ 26.663857] __kasan_record_aux_stack+0x8e/0xa0 [ 26.664363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.664927] remove_vma+0x139/0x170 [ 26.665322] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.665820] do_vmi_munmap+0x1f1/0x2b0 [ 26.666255] __vm_munmap+0x138/0x3a0 [ 26.666669] __x64_sys_munmap+0x59/0x80 [ 26.667111] do_syscall_64+0x3f/0x90 [ 26.667527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.668106] [ 26.668294] Second to last potentially related work creation: [ 26.668900] kasan_save_stack+0x22/0x50 [ 26.669351] __kasan_record_aux_stack+0x8e/0xa0 [ 26.669860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.670433] remove_vma+0x139/0x170 [ 26.670839] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.671331] do_vmi_munmap+0x1f1/0x2b0 [ 26.671761] mmap_region+0x1f9/0x2660 [ 26.672109] do_mmap+0x854/0xf00 [ 26.672410] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.672754] ksys_mmap_pgoff+0x3af/0x500 [ 26.673111] do_syscall_64+0x3f/0x90 [ 26.673437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.673880] [ 26.674032] The buggy address belongs to the object at ffff88800fe6dcb0 [ 26.674032] which belongs to the cache vm_area_struct of size 168 [ 26.675051] The buggy address is located 88 bytes inside of [ 26.675051] freed 168-byte region [ffff88800fe6dcb0, ffff88800fe6dd58) [ 26.676040] [ 26.676198] The buggy address belongs to the physical page: [ 26.676648] page:000000001832d6f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe6d [ 26.677389] memcg:ffff88800e18cd01 [ 26.677685] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.678165] page_type: 0xffffffff() [ 26.678478] raw: 0100000000000200 ffff88800879fc80 ffffea0000327440 0000000000000009 [ 26.679116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e18cd01 [ 26.679741] page dumped because: kasan: bad access detected [ 26.680202] [ 26.680351] Memory state around the buggy address: [ 26.680754] ffff88800fe6dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 26.681355] ffff88800fe6dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.681941] >ffff88800fe6dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.682530] ^ [ 26.682833] ffff88800fe6dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.683421] ffff88800fe6de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 26.684015] ================================================================== [ 26.684836] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.819130] BUG: Bad rss-counter state mm:00000000cec1af35 type:MM_FILEPAGES val:33 [ 28.820386] BUG: Bad rss-counter state mm:00000000cec1af35 type:MM_ANONPAGES val:22 [ 29.225495] BUG: Bad rss-counter state mm:00000000be9e3390 type:MM_FILEPAGES val:33 [ 29.226711] BUG: Bad rss-counter state mm:00000000be9e3390 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59490' (ECDSA) to the list of known hosts. 2023/06/20 05:31:10 fuzzer started 2023/06/20 05:31:10 dialing manager at localhost:44161 2023/06/20 05:31:10 checking machine... 2023/06/20 05:31:10 checking revisions... [ 29.953726] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:31:10 testing simple program... [ 29.994955] cgroup: Unknown subsys name 'net' [ 30.035989] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:31:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ea7ebe0 RCX=ffff88800844f780 RDX=ffffea000039fa00 RSI=0000000000000008 RDI=ffffffff8452fffc RBP=0000000000000000 RSP=ffff888019c97808 R8 =ffff88800e7e84c0 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000d000c R12=dffffc0000000000 R13=ffff888019c97848 R14=ffff88800844f780 R15=ffff88800e7e8980 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007fb100342900 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=00007fb1008f7650 CR3=0000000015abe000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000008 RSI=0000000000000067 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff888013a6f858 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000008 R13=0000000000000008 R14=0000000000000067 R15=ffff888013a6f910 RIP=ffffffff814c07eb 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 00007f76efeb3900 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=00007f76ef2afa00 CR3=000000000c426000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0055084983732d1a00000000000ae988 XMM05=963f212a82071bee00000000001357c0 XMM06=bdf2e299e47b49d50000000000134240 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000