[ 24.083229] BUG: Bad rss-counter state mm:00000000d0697c15 type:MM_FILEPAGES val:33 [ 24.084369] BUG: Bad rss-counter state mm:00000000d0697c15 type:MM_ANONPAGES val:22 [ 24.252671] ================================================================== [ 24.253608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.254554] Read of size 8 at addr ffff88800dd57c20 by task sshd/220 [ 24.255314] [ 24.255526] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.256470] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.257426] Call Trace: [ 24.257781] [ 24.258065] dump_stack_lvl+0x91/0xf0 [ 24.258553] print_report+0xcc/0x620 [ 24.259033] ? __virt_addr_valid+0x102/0x340 [ 24.259586] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.260191] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.260800] kasan_report+0xbe/0xf0 [ 24.261272] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.261909] vma_interval_tree_remove+0xc75/0xec0 [ 24.262514] vma_prepare+0xc54/0x11a0 [ 24.262995] __split_vma+0x5af/0x950 [ 24.263459] ? __pfx___split_vma+0x10/0x10 [ 24.263979] ? find_held_lock+0x2c/0x110 [ 24.264490] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.265042] ? lock_is_held_type+0x9f/0x120 [ 24.265592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.266203] ? mtree_range_walk+0x632/0x900 [ 24.266754] ? mas_walk+0x5c7/0x7c0 [ 24.267230] do_vmi_munmap+0x1f1/0x2b0 [ 24.267714] mmap_region+0x1f9/0x2660 [ 24.268187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.268689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.269399] ? __pfx_lock_acquire+0x10/0x10 [ 24.269961] ? __pfx_mmap_region+0x10/0x10 [ 24.270480] ? security_mmap_addr+0x7d/0xa0 [ 24.271024] ? get_unmapped_area+0x1f5/0x3f0 [ 24.271571] do_mmap+0x854/0xf00 [ 24.272012] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.272503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.273064] ksys_mmap_pgoff+0x3af/0x500 [ 24.273575] do_syscall_64+0x3f/0x90 [ 24.274064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.274705] RIP: 0033:0x7f88e2d04d82 [ 24.275159] 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 [ 24.277256] RSP: 002b:00007ffdea3d56a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.278179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88e2d04d82 [ 24.279012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88e213e000 [ 24.279847] RBP: 00007f88e213e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.280684] R10: 0000000000000812 R11: 0000000000000206 R12: 000055accdc04ec0 [ 24.281522] R13: 00007ffdea3d56c0 R14: 00007ffdea3d56f0 R15: 00007ffdea3d5a50 [ 24.282404] [ 24.282691] [ 24.282905] Allocated by task 213: [ 24.283334] kasan_save_stack+0x22/0x50 [ 24.283835] kasan_set_track+0x25/0x30 [ 24.284318] __kasan_slab_alloc+0x59/0x70 [ 24.284837] kmem_cache_alloc+0x16b/0x370 [ 24.285341] vm_area_dup+0x20/0x160 [ 24.285813] __split_vma+0x170/0x950 [ 24.286270] split_vma+0xc6/0x110 [ 24.286704] mprotect_fixup+0x8d2/0xb30 [ 24.287200] do_mprotect_pkey+0x87e/0xd40 [ 24.287711] __x64_sys_mprotect+0x78/0xc0 [ 24.288221] do_syscall_64+0x3f/0x90 [ 24.288686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.289314] [ 24.289528] Freed by task 204: [ 24.289945] kasan_save_stack+0x22/0x50 [ 24.290440] kasan_set_track+0x25/0x30 [ 24.290930] kasan_save_free_info+0x2b/0x50 [ 24.291454] __kasan_slab_free+0x10a/0x190 [ 24.291989] kmem_cache_free+0x10d/0x4d0 [ 24.292487] rcu_core+0x8c8/0x2860 [ 24.292924] __do_softirq+0x1b7/0x7d4 [ 24.293401] [ 24.293646] Last potentially related work creation: [ 24.294220] kasan_save_stack+0x22/0x50 [ 24.294717] __kasan_record_aux_stack+0x8e/0xa0 [ 24.295284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.295922] remove_vma+0x139/0x170 [ 24.296370] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.296919] do_vmi_munmap+0x1f1/0x2b0 [ 24.297396] __vm_munmap+0x138/0x3a0 [ 24.297883] __x64_sys_munmap+0x59/0x80 [ 24.298374] do_syscall_64+0x3f/0x90 [ 24.298845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.299482] [ 24.299697] The buggy address belongs to the object at ffff88800dd57bc8 [ 24.299697] which belongs to the cache vm_area_struct of size 168 [ 24.301148] The buggy address is located 88 bytes inside of [ 24.301148] freed 168-byte region [ffff88800dd57bc8, ffff88800dd57c70) [ 24.302575] [ 24.302788] The buggy address belongs to the physical page: [ 24.303441] page:00000000a7dc160f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd57 [ 24.304500] memcg:ffff88800e97ca01 [ 24.304917] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.305638] page_type: 0xffffffff() [ 24.306086] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c0c00 dead000000000003 [ 24.306989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e97ca01 [ 24.307878] page dumped because: kasan: bad access detected [ 24.308523] [ 24.308734] Memory state around the buggy address: [ 24.309303] ffff88800dd57b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.310180] ffff88800dd57b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.311027] >ffff88800dd57c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.311859] ^ [ 24.312384] ffff88800dd57c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.313239] ffff88800dd57d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.314112] ================================================================== [ 24.315057] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.019840] BUG: Bad rss-counter state mm:00000000672717ef type:MM_FILEPAGES val:33 [ 26.020604] BUG: Bad rss-counter state mm:00000000672717ef type:MM_ANONPAGES val:22 [ 26.448263] BUG: Bad rss-counter state mm:000000003aab69f0 type:MM_FILEPAGES val:33 [ 26.449550] BUG: Bad rss-counter state mm:000000003aab69f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10644' (ECDSA) to the list of known hosts. 2023/06/20 23:45:20 fuzzer started 2023/06/20 23:45:20 dialing manager at localhost:36067 2023/06/20 23:45:20 checking machine... 2023/06/20 23:45:20 checking revisions... [ 26.943714] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:45:20 testing simple program... [ 26.985401] cgroup: Unknown subsys name 'net' [ 27.033528] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:45:20 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=0000000000000001 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=00007ffeb5ba0638 CR3=0000000005482000 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=00007fc3e6acf51000005626ea429790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180ce88 RDX=00000000000080ce RSI=00000000000080ce RDI=ffffffff86509d28 RBP=ffff88800dedf8a0 RSP=ffff88800dedf7d8 R8 =0000000000000000 R9 =ffff88800dedf888 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800dedf8a8 R13=ffff88800dedf890 R14=ffff88800dedf889 R15=ffff88800dedf848 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f4ba24b6900 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=00007f4ba2a6e0b0 CR3=000000000fc7e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000