[ 31.519704] BUG: Bad rss-counter state mm:000000000f75be50 type:MM_FILEPAGES val:33 [ 31.520857] BUG: Bad rss-counter state mm:000000000f75be50 type:MM_ANONPAGES val:22 [ 31.675090] ================================================================== [ 31.675972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.676884] Read of size 8 at addr ffff88800e5ff880 by task sshd/218 [ 31.677623] [ 31.677835] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.678777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.679720] Call Trace: [ 31.680029] [ 31.680320] dump_stack_lvl+0x91/0xf0 [ 31.680799] print_report+0xcc/0x620 [ 31.681272] ? __virt_addr_valid+0x102/0x340 [ 31.681810] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682429] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.683032] kasan_report+0xbe/0xf0 [ 31.683497] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.684102] vma_interval_tree_remove+0xc75/0xec0 [ 31.684686] vma_prepare+0xc54/0x11a0 [ 31.685150] __split_vma+0x5af/0x950 [ 31.685613] ? __pfx___split_vma+0x10/0x10 [ 31.686136] ? find_held_lock+0x2c/0x110 [ 31.686680] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.687263] ? lock_is_held_type+0x9f/0x120 [ 31.687800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.688393] ? mtree_range_walk+0x632/0x900 [ 31.688929] ? mas_walk+0x5c7/0x7c0 [ 31.689398] do_vmi_munmap+0x1f1/0x2b0 [ 31.689879] mmap_region+0x1f9/0x2660 [ 31.690349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.690869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.691564] ? __pfx_lock_acquire+0x10/0x10 [ 31.692080] ? __pfx_mmap_region+0x10/0x10 [ 31.692594] ? security_mmap_addr+0x7d/0xa0 [ 31.693113] ? get_unmapped_area+0x1f5/0x3f0 [ 31.693682] do_mmap+0x854/0xf00 [ 31.694113] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.694638] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.695182] ksys_mmap_pgoff+0x3af/0x500 [ 31.695675] do_syscall_64+0x3f/0x90 [ 31.696151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.696813] RIP: 0033:0x7fd846a7bd82 [ 31.697282] 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 [ 31.699374] RSP: 002b:00007ffc17638c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.700252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd846a7bd82 [ 31.701083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd845eb5000 [ 31.701942] RBP: 00007fd845eb5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.702824] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eeaf4d1f70 [ 31.703649] R13: 00007ffc17638cb0 R14: 00007ffc17638ce0 R15: 00007ffc17639040 [ 31.704484] [ 31.704768] [ 31.704977] Allocated by task 211: [ 31.705395] kasan_save_stack+0x22/0x50 [ 31.705890] kasan_set_track+0x25/0x30 [ 31.706372] __kasan_slab_alloc+0x59/0x70 [ 31.706891] kmem_cache_alloc+0x16b/0x370 [ 31.707396] vm_area_dup+0x20/0x160 [ 31.707838] __split_vma+0x170/0x950 [ 31.708302] split_vma+0xc6/0x110 [ 31.708733] mprotect_fixup+0x8d2/0xb30 [ 31.709224] do_mprotect_pkey+0x87e/0xd40 [ 31.709735] __x64_sys_mprotect+0x78/0xc0 [ 31.710246] do_syscall_64+0x3f/0x90 [ 31.710734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.711372] [ 31.711587] Freed by task 211: [ 31.711974] kasan_save_stack+0x22/0x50 [ 31.712474] kasan_set_track+0x25/0x30 [ 31.712967] kasan_save_free_info+0x2b/0x50 [ 31.713493] __kasan_slab_free+0x10a/0x190 [ 31.714012] kmem_cache_free+0x10d/0x4d0 [ 31.714518] rcu_core+0x8c8/0x2860 [ 31.714948] __do_softirq+0x1b7/0x7d4 [ 31.715428] [ 31.715638] Last potentially related work creation: [ 31.716209] kasan_save_stack+0x22/0x50 [ 31.716706] __kasan_record_aux_stack+0x8e/0xa0 [ 31.717264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.717891] remove_vma+0x139/0x170 [ 31.718336] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.718904] do_vmi_munmap+0x1f1/0x2b0 [ 31.719377] __vm_munmap+0x138/0x3a0 [ 31.719837] __x64_sys_munmap+0x59/0x80 [ 31.720355] do_syscall_64+0x3f/0x90 [ 31.720824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.721491] [ 31.721708] Second to last potentially related work creation: [ 31.722397] kasan_save_stack+0x22/0x50 [ 31.722898] __kasan_record_aux_stack+0x8e/0xa0 [ 31.723460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.724096] remove_vma+0x139/0x170 [ 31.724575] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.725133] do_vmi_munmap+0x1f1/0x2b0 [ 31.725634] mmap_region+0x1f9/0x2660 [ 31.726112] do_mmap+0x854/0xf00 [ 31.726546] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.727032] ksys_mmap_pgoff+0x3af/0x500 [ 31.727527] do_syscall_64+0x3f/0x90 [ 31.727998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.728634] [ 31.728848] The buggy address belongs to the object at ffff88800e5ff828 [ 31.728848] which belongs to the cache vm_area_struct of size 168 [ 31.730355] The buggy address is located 88 bytes inside of [ 31.730355] freed 168-byte region [ffff88800e5ff828, ffff88800e5ff8d0) [ 31.731772] [ 31.731989] The buggy address belongs to the physical page: [ 31.732641] page:00000000e7cae1aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ff [ 31.733888] memcg:ffff88800e91a501 [ 31.734345] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.735067] page_type: 0xffffffff() [ 31.735541] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.736462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e91a501 [ 31.737387] page dumped because: kasan: bad access detected [ 31.738044] [ 31.738267] Memory state around the buggy address: [ 31.738862] ffff88800e5ff780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.739725] ffff88800e5ff800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.740619] >ffff88800e5ff880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.741500] ^ [ 31.741919] ffff88800e5ff900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.742799] ffff88800e5ff980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.743781] ================================================================== [ 31.744807] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.144472] BUG: Bad rss-counter state mm:000000005a0f2807 type:MM_FILEPAGES val:33 [ 34.145649] BUG: Bad rss-counter state mm:000000005a0f2807 type:MM_ANONPAGES val:22 [ 34.615186] BUG: Bad rss-counter state mm:0000000078538712 type:MM_FILEPAGES val:33 [ 34.616545] BUG: Bad rss-counter state mm:0000000078538712 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35050' (ECDSA) to the list of known hosts. 2023/06/20 14:01:40 fuzzer started 2023/06/20 14:01:41 dialing manager at localhost:36067 2023/06/20 14:01:41 checking machine... 2023/06/20 14:01:41 checking revisions... [ 35.336278] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:01:41 testing simple program... [ 35.388128] cgroup: Unknown subsys name 'net' [ 35.425955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:01:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed100d9c13a4 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09d10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d9031 RFL=00000282 [--S----] 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 00007f109abaa700 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=00007f4cbee4f780 CR3=000000000dd16000 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=2030343a31303a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a31303a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007fd652ad4110 RBX=0000000000000430 RCX=000055d3bb396770 RDX=000055d3bb396770 RSI=0000000000100000 RDI=000055d3bb396770 RBP=0000000000000440 RSP=fffffe0000049fd0 R8 =0000000000000002 R9 =00007fd652ad3be0 R10=000000000000006e R11=0000000000000000 R12=00007fd652ad3b80 R13=0000000000000930 R14=0000000000000930 R15=000055d3bb396770 RIP=ffffffff84601260 RFL=00000002 [-------] 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 00007fd652521900 00000000 00000000 GS =0000 0000000000000000 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=000055d3bb396798 CR3=000000000eec4000 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=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