[ 30.857285] BUG: Bad rss-counter state mm:000000000a3e7d7f type:MM_FILEPAGES val:33 [ 30.858884] BUG: Bad rss-counter state mm:000000000a3e7d7f type:MM_ANONPAGES val:22 [ 30.937518] ================================================================== [ 30.938436] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.939368] Read of size 8 at addr ffff888016de5798 by task sshd/219 [ 30.940143] [ 30.940360] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.941358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.942342] Call Trace: [ 30.942661] [ 30.942951] dump_stack_lvl+0x91/0xf0 [ 30.943464] print_report+0xcc/0x620 [ 30.943955] ? __virt_addr_valid+0x102/0x340 [ 30.944518] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945175] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945803] kasan_report+0xbe/0xf0 [ 30.946287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.946907] vma_interval_tree_remove+0xc75/0xec0 [ 30.947526] vma_prepare+0xc54/0x11a0 [ 30.948008] __split_vma+0x5af/0x950 [ 30.948496] ? __pfx___split_vma+0x10/0x10 [ 30.949045] ? find_held_lock+0x2c/0x110 [ 30.949571] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.950133] ? lock_is_held_type+0x9f/0x120 [ 30.950668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.951276] ? mtree_range_walk+0x632/0x900 [ 30.951830] ? mas_walk+0x5c7/0x7c0 [ 30.952308] do_vmi_munmap+0x1f1/0x2b0 [ 30.952809] mmap_region+0x1f9/0x2660 [ 30.953311] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.953831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.954551] ? __pfx_lock_acquire+0x10/0x10 [ 30.955083] ? __pfx_mmap_region+0x10/0x10 [ 30.955622] ? security_mmap_addr+0x7d/0xa0 [ 30.956156] ? get_unmapped_area+0x1f5/0x3f0 [ 30.956701] do_mmap+0x854/0xf00 [ 30.957157] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.957652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.958218] ksys_mmap_pgoff+0x3af/0x500 [ 30.958737] do_syscall_64+0x3f/0x90 [ 30.959216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.959861] RIP: 0033:0x7fd3e8b06d82 [ 30.960329] 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 [ 30.962462] RSP: 002b:00007ffd979ef5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.963367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3e8b06d82 [ 30.964215] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3e7f40000 [ 30.965088] RBP: 00007fd3e7f40000 R08: 0000000000000009 R09: 0000000000001000 [ 30.965934] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643db90bec0 [ 30.966792] R13: 00007ffd979ef5e0 R14: 00007ffd979ef610 R15: 00007ffd979ef970 [ 30.967661] [ 30.967954] [ 30.968173] Allocated by task 212: [ 30.968606] kasan_save_stack+0x22/0x50 [ 30.969124] kasan_set_track+0x25/0x30 [ 30.969623] __kasan_slab_alloc+0x59/0x70 [ 30.970149] kmem_cache_alloc+0x16b/0x370 [ 30.970666] vm_area_dup+0x20/0x160 [ 30.971123] __split_vma+0x170/0x950 [ 30.971598] split_vma+0xc6/0x110 [ 30.972042] mprotect_fixup+0x8d2/0xb30 [ 30.972555] do_mprotect_pkey+0x87e/0xd40 [ 30.973094] __x64_sys_mprotect+0x78/0xc0 [ 30.973625] do_syscall_64+0x3f/0x90 [ 30.974103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.974748] [ 30.974962] Freed by task 0: [ 30.975342] kasan_save_stack+0x22/0x50 [ 30.975851] kasan_set_track+0x25/0x30 [ 30.976348] kasan_save_free_info+0x2b/0x50 [ 30.976899] __kasan_slab_free+0x10a/0x190 [ 30.977438] kmem_cache_free+0x10d/0x4d0 [ 30.977950] rcu_core+0x8c8/0x2860 [ 30.978397] __do_softirq+0x1b7/0x7d4 [ 30.978873] [ 30.979090] Last potentially related work creation: [ 30.979681] kasan_save_stack+0x22/0x50 [ 30.980187] __kasan_record_aux_stack+0x8e/0xa0 [ 30.980767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.981429] remove_vma+0x139/0x170 [ 30.981879] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.982442] do_vmi_munmap+0x1f1/0x2b0 [ 30.982929] __vm_munmap+0x138/0x3a0 [ 30.983402] __x64_sys_munmap+0x59/0x80 [ 30.983902] do_syscall_64+0x3f/0x90 [ 30.984392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985052] [ 30.985269] The buggy address belongs to the object at ffff888016de5740 [ 30.985269] which belongs to the cache vm_area_struct of size 168 [ 30.986741] The buggy address is located 88 bytes inside of [ 30.986741] freed 168-byte region [ffff888016de5740, ffff888016de57e8) [ 30.988174] [ 30.988398] The buggy address belongs to the physical page: [ 30.989068] page:000000008fc1a171 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16de5 [ 30.990202] memcg:ffff88800df7f001 [ 30.990650] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.991378] page_type: 0xffffffff() [ 30.991846] raw: 0100000000000200 ffff8880087a0c80 ffffea00003922c0 dead000000000003 [ 30.992790] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df7f001 [ 30.993733] page dumped because: kasan: bad access detected [ 30.994396] [ 30.994620] Memory state around the buggy address: [ 30.995216] ffff888016de5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.996110] ffff888016de5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.997017] >ffff888016de5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.997909] ^ [ 30.998424] ffff888016de5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.999323] ffff888016de5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.000208] ================================================================== [ 31.001349] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.725238] BUG: Bad rss-counter state mm:00000000cc3e6398 type:MM_FILEPAGES val:33 [ 32.726427] BUG: Bad rss-counter state mm:00000000cc3e6398 type:MM_ANONPAGES val:22 [ 33.194309] BUG: Bad rss-counter state mm:0000000068767649 type:MM_FILEPAGES val:33 [ 33.195494] BUG: Bad rss-counter state mm:0000000068767649 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24800' (ECDSA) to the list of known hosts. 2023/06/20 21:12:24 fuzzer started 2023/06/20 21:12:24 dialing manager at localhost:36067 2023/06/20 21:12:24 checking machine... 2023/06/20 21:12:24 checking revisions... [ 33.914120] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:12:24 testing simple program... [ 33.962531] cgroup: Unknown subsys name 'net' [ 34.021029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:12:24 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=00007f9345350b80 CR3=000000000f370000 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=8730b94b2b1e34808f4070ad217e4e2f XMM02=ec2efd57dc4c00df000000000011a8c0 XMM03=50c39edd4955ddf6000000000011a990 XMM04=26c081bc71a7bad300000000000ae988 XMM05=1e05a81caa8c8fd00000000000131bb8 XMM06=806171799158d9670000000000130d58 XMM07=e042d86d42eb936e0000000000121550 XMM08=50c39edd4955ddf6000000000011a990 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00006bf808 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffd40000d7f09 RSI=ffffffff8170f63d RDI=ffffea00006bf848 RBP=ffff88800eb07d90 RSP=ffff88800eb07c00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006bf840 R13=ffff88800e371bc8 R14=ffff88800eb07db8 R15=0000000000000000 RIP=ffffffff8170f662 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb9d3d98900 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=00007fb9d49093ec CR3=000000000f710000 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