[ 42.938023] BUG: Bad rss-counter state mm:0000000030d885a5 type:MM_FILEPAGES val:33 [ 42.939565] BUG: Bad rss-counter state mm:0000000030d885a5 type:MM_ANONPAGES val:22 [ 43.003504] ================================================================== [ 43.004611] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.005757] Read of size 8 at addr ffff88800e76ca50 by task sshd/218 [ 43.006849] [ 43.007095] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.007989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.009001] Call Trace: [ 43.009334] [ 43.009628] dump_stack_lvl+0x91/0xf0 [ 43.010156] print_report+0xcc/0x620 [ 43.010662] ? __virt_addr_valid+0x102/0x340 [ 43.011249] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.011890] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.012546] kasan_report+0xbe/0xf0 [ 43.013039] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.013680] vma_interval_tree_remove+0xc75/0xec0 [ 43.014321] vma_prepare+0xc54/0x11a0 [ 43.014820] __split_vma+0x5af/0x950 [ 43.015314] ? __pfx___split_vma+0x10/0x10 [ 43.015871] ? find_held_lock+0x2c/0x110 [ 43.016417] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.017011] ? lock_is_held_type+0x9f/0x120 [ 43.017571] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.018230] ? mtree_range_walk+0x632/0x900 [ 43.018823] ? mas_walk+0x5c7/0x7c0 [ 43.019322] do_vmi_munmap+0x1f1/0x2b0 [ 43.019833] mmap_region+0x1f9/0x2660 [ 43.020337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.020876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.021618] ? __pfx_lock_acquire+0x10/0x10 [ 43.022190] ? __pfx_mmap_region+0x10/0x10 [ 43.022745] ? security_mmap_addr+0x7d/0xa0 [ 43.023306] ? get_unmapped_area+0x1f5/0x3f0 [ 43.023885] do_mmap+0x854/0xf00 [ 43.024338] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.024859] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.025445] ksys_mmap_pgoff+0x3af/0x500 [ 43.025991] do_syscall_64+0x3f/0x90 [ 43.026482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.027160] RIP: 0033:0x7fae92c02d82 [ 43.027642] 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 [ 43.029892] RSP: 002b:00007ffded1a5e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.030868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae92c02d82 [ 43.031776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae9203c000 [ 43.032674] RBP: 00007fae9203c000 R08: 0000000000000009 R09: 0000000000001000 [ 43.033571] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565345e4cf70 [ 43.034455] R13: 00007ffded1a5e40 R14: 00007ffded1a5e70 R15: 00007ffded1a61d0 [ 43.035349] [ 43.035650] [ 43.035884] Allocated by task 211: [ 43.036338] kasan_save_stack+0x22/0x50 [ 43.036873] kasan_set_track+0x25/0x30 [ 43.037399] __kasan_slab_alloc+0x59/0x70 [ 43.037963] kmem_cache_alloc+0x16b/0x370 [ 43.038502] vm_area_dup+0x20/0x160 [ 43.038972] __split_vma+0x170/0x950 [ 43.039467] split_vma+0xc6/0x110 [ 43.039927] mprotect_fixup+0x8d2/0xb30 [ 43.040457] do_mprotect_pkey+0x87e/0xd40 [ 43.041005] __x64_sys_mprotect+0x78/0xc0 [ 43.041531] do_syscall_64+0x3f/0x90 [ 43.042026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.042676] [ 43.042890] Freed by task 211: [ 43.043280] kasan_save_stack+0x22/0x50 [ 43.043783] kasan_set_track+0x25/0x30 [ 43.044273] kasan_save_free_info+0x2b/0x50 [ 43.044796] __kasan_slab_free+0x10a/0x190 [ 43.045335] kmem_cache_free+0x10d/0x4d0 [ 43.045839] rcu_core+0x8c8/0x2860 [ 43.046295] __do_softirq+0x1b7/0x7d4 [ 43.046779] [ 43.046994] Last potentially related work creation: [ 43.047649] kasan_save_stack+0x22/0x50 [ 43.048145] __kasan_record_aux_stack+0x8e/0xa0 [ 43.048719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.049365] remove_vma+0x139/0x170 [ 43.049815] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.050392] do_vmi_munmap+0x1f1/0x2b0 [ 43.050877] __vm_munmap+0x138/0x3a0 [ 43.051350] __x64_sys_munmap+0x59/0x80 [ 43.051845] do_syscall_64+0x3f/0x90 [ 43.052315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.052951] [ 43.053165] Second to last potentially related work creation: [ 43.053841] kasan_save_stack+0x22/0x50 [ 43.054353] __kasan_record_aux_stack+0x8e/0xa0 [ 43.054925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.055563] remove_vma+0x139/0x170 [ 43.056012] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.056573] do_vmi_munmap+0x1f1/0x2b0 [ 43.057052] __vm_munmap+0x138/0x3a0 [ 43.057520] __x64_sys_munmap+0x59/0x80 [ 43.058033] do_syscall_64+0x3f/0x90 [ 43.058507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.059157] [ 43.059377] The buggy address belongs to the object at ffff88800e76c9f8 [ 43.059377] which belongs to the cache vm_area_struct of size 168 [ 43.060921] The buggy address is located 88 bytes inside of [ 43.060921] freed 168-byte region [ffff88800e76c9f8, ffff88800e76caa0) [ 43.062415] [ 43.062644] The buggy address belongs to the physical page: [ 43.063348] page:000000006f8ffa7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe76c [ 43.064475] memcg:ffff8880097de301 [ 43.064920] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.065601] page_type: 0xffffffff() [ 43.066083] raw: 0100000000000200 ffff88800879fc80 ffffea00002fa840 dead000000000002 [ 43.067054] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097de301 [ 43.068019] page dumped because: kasan: bad access detected [ 43.068709] [ 43.068938] Memory state around the buggy address: [ 43.069542] ffff88800e76c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.070457] ffff88800e76c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 43.071353] >ffff88800e76ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.072229] ^ [ 43.072942] ffff88800e76ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 43.073827] ffff88800e76cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.074706] ================================================================== [ 43.075753] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 45.109366] BUG: Bad rss-counter state mm:00000000558c2b8e type:MM_FILEPAGES val:33 [ 45.109983] BUG: Bad rss-counter state mm:00000000558c2b8e type:MM_ANONPAGES val:22 [ 45.545268] BUG: Bad rss-counter state mm:0000000074bb8f36 type:MM_FILEPAGES val:33 [ 45.546319] BUG: Bad rss-counter state mm:0000000074bb8f36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25405' (ECDSA) to the list of known hosts. 2023/06/19 18:04:04 fuzzer started 2023/06/19 18:04:04 dialing manager at localhost:44161 2023/06/19 18:04:04 checking machine... 2023/06/19 18:04:04 checking revisions... [ 46.279491] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:04:04 testing simple program... [ 46.329167] cgroup: Unknown subsys name 'net' [ 46.388225] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:03:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b38 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff88806ce09b44 RBP=000000000000000d RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888014330000 R15=ffff88800eb14e60 RIP=ffffffff813ad49e RFL=00000213 [----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 00007f58885b5900 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=00007f58879bbaf0 CR3=000000000ea82000 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=723aaa30c6375c7300000000000ae988 XMM05=3148b0e58e3127cb0000000000137290 XMM06=bdf2e299e47b49d50000000000135d10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f89bf3a3600 RCX=0000000000000000 RDX=ffff8880100c3680 RSI=ffffffff813a0ad6 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff888019e47948 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff8880100c3680 R15=ffff8880094ca900 RIP=ffffffff814c081b 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 00007f89beec0900 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=00007ffdc4b4a000 CR3=000000000e800000 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