[ 31.942817] BUG: Bad rss-counter state mm:0000000097f4e18b type:MM_FILEPAGES val:33 [ 31.943908] BUG: Bad rss-counter state mm:0000000097f4e18b type:MM_ANONPAGES val:22 [ 32.125783] ================================================================== [ 32.126730] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.127710] Read of size 8 at addr ffff88800ea386b0 by task sshd/219 [ 32.128583] [ 32.128844] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.129762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.130809] Call Trace: [ 32.131146] [ 32.131448] dump_stack_lvl+0x91/0xf0 [ 32.131952] print_report+0xcc/0x620 [ 32.132458] ? __virt_addr_valid+0x102/0x340 [ 32.133057] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.133710] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.134348] kasan_report+0xbe/0xf0 [ 32.134838] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.135472] vma_interval_tree_remove+0xc75/0xec0 [ 32.136080] vma_prepare+0xc54/0x11a0 [ 32.136567] __split_vma+0x5af/0x950 [ 32.137075] ? __pfx___split_vma+0x10/0x10 [ 32.137627] ? find_held_lock+0x2c/0x110 [ 32.138161] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.138727] ? lock_is_held_type+0x9f/0x120 [ 32.139257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.139858] ? mtree_range_walk+0x632/0x900 [ 32.140406] ? mas_walk+0x5c7/0x7c0 [ 32.140923] do_vmi_munmap+0x1f1/0x2b0 [ 32.141437] mmap_region+0x1f9/0x2660 [ 32.141924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.142432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.143145] ? __pfx_lock_acquire+0x10/0x10 [ 32.143679] ? __pfx_mmap_region+0x10/0x10 [ 32.144211] ? security_mmap_addr+0x7d/0xa0 [ 32.144799] ? get_unmapped_area+0x1f5/0x3f0 [ 32.145377] do_mmap+0x854/0xf00 [ 32.145813] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.146304] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.146868] ksys_mmap_pgoff+0x3af/0x500 [ 32.147372] do_syscall_64+0x3f/0x90 [ 32.147847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.148500] RIP: 0033:0x7f217eb91d82 [ 32.148997] 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 [ 32.151110] RSP: 002b:00007ffe8f8683c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.152011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f217eb91d82 [ 32.152885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f217dfcb000 [ 32.153743] RBP: 00007f217dfcb000 R08: 0000000000000009 R09: 0000000000001000 [ 32.154739] R10: 0000000000000812 R11: 0000000000000206 R12: 000056123321cec0 [ 32.155765] R13: 00007ffe8f8683e0 R14: 00007ffe8f868410 R15: 00007ffe8f868770 [ 32.156851] [ 32.157209] [ 32.157483] Allocated by task 211: [ 32.158003] kasan_save_stack+0x22/0x50 [ 32.158616] kasan_set_track+0x25/0x30 [ 32.159244] __kasan_slab_alloc+0x59/0x70 [ 32.159884] kmem_cache_alloc+0x16b/0x370 [ 32.160515] vm_area_dup+0x20/0x160 [ 32.161065] __split_vma+0x170/0x950 [ 32.161649] split_vma+0xc6/0x110 [ 32.162180] mprotect_fixup+0x8d2/0xb30 [ 32.162832] do_mprotect_pkey+0x87e/0xd40 [ 32.163466] __x64_sys_mprotect+0x78/0xc0 [ 32.164101] do_syscall_64+0x3f/0x90 [ 32.164683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.165489] [ 32.165747] Freed by task 211: [ 32.166221] kasan_save_stack+0x22/0x50 [ 32.166874] kasan_set_track+0x25/0x30 [ 32.167473] kasan_save_free_info+0x2b/0x50 [ 32.168127] __kasan_slab_free+0x10a/0x190 [ 32.168771] kmem_cache_free+0x10d/0x4d0 [ 32.169402] rcu_core+0x8c8/0x2860 [ 32.169944] __do_softirq+0x1b7/0x7d4 [ 32.170516] [ 32.170820] Last potentially related work creation: [ 32.171527] kasan_save_stack+0x22/0x50 [ 32.172133] __kasan_record_aux_stack+0x8e/0xa0 [ 32.172822] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.173625] remove_vma+0x139/0x170 [ 32.174166] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.174880] do_vmi_munmap+0x1f1/0x2b0 [ 32.175457] __vm_munmap+0x138/0x3a0 [ 32.176014] __x64_sys_munmap+0x59/0x80 [ 32.176614] do_syscall_64+0x3f/0x90 [ 32.177166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.177946] [ 32.178203] Second to last potentially related work creation: [ 32.179067] kasan_save_stack+0x22/0x50 [ 32.179671] __kasan_record_aux_stack+0x8e/0xa0 [ 32.180358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.181126] remove_vma+0x139/0x170 [ 32.181684] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.182348] do_vmi_munmap+0x1f1/0x2b0 [ 32.182975] mmap_region+0x1f9/0x2660 [ 32.183546] do_mmap+0x854/0xf00 [ 32.184067] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.184648] ksys_mmap_pgoff+0x3af/0x500 [ 32.185245] do_syscall_64+0x3f/0x90 [ 32.185840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.186612] [ 32.186908] The buggy address belongs to the object at ffff88800ea38658 [ 32.186908] which belongs to the cache vm_area_struct of size 168 [ 32.188648] The buggy address is located 88 bytes inside of [ 32.188648] freed 168-byte region [ffff88800ea38658, ffff88800ea38700) [ 32.190330] [ 32.190583] The buggy address belongs to the physical page: [ 32.191400] page:0000000035eda158 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea38 [ 32.192689] memcg:ffff88800d0ee901 [ 32.193186] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.194021] page_type: 0xffffffff() [ 32.194556] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 32.195683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0ee901 [ 32.196755] page dumped because: kasan: bad access detected [ 32.197559] [ 32.197829] Memory state around the buggy address: [ 32.198514] ffff88800ea38580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.199566] ffff88800ea38600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.200575] >ffff88800ea38680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.201582] ^ [ 32.202262] ffff88800ea38700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.203310] ffff88800ea38780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.204314] ================================================================== [ 32.205505] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.695096] BUG: Bad rss-counter state mm:0000000098d47d27 type:MM_FILEPAGES val:33 [ 34.696161] BUG: Bad rss-counter state mm:0000000098d47d27 type:MM_ANONPAGES val:22 [ 35.176141] BUG: Bad rss-counter state mm:0000000097883e36 type:MM_FILEPAGES val:33 [ 35.177199] BUG: Bad rss-counter state mm:0000000097883e36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13098' (ECDSA) to the list of known hosts. 2023/06/20 16:22:36 fuzzer started 2023/06/20 16:22:37 dialing manager at localhost:36067 2023/06/20 16:22:37 checking machine... 2023/06/20 16:22:37 checking revisions... [ 35.925023] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:22:37 testing simple program... [ 35.980081] cgroup: Unknown subsys name 'net' [ 36.031576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:36 Registers: info registers vcpu 0 RAX=ffffffff861414bf RBX=0000000000000001 RCX=ffffffff861414ba RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff861414be R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000223eb R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ab5 RFL=00000297 [--S-APC] 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 00007fcdf715a900 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=00007fcdf65b4d00 CR3=000000000c9ce000 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=e99e50464a5fcc1a00000000000ae988 XMM05=def8808c31408a640000000000134368 XMM06=806171799158d9670000000000132de8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880190d65e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=ffff888016cf2b00 RSP=ffff888008e37cf0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff8880087b8500 R13=ffffea0000643580 R14=ffffffff813782f8 R15=ffff888016cf2b00 RIP=ffffffff812d8e60 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 0000000000000000 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=00007ffe9a6aefec CR3=0000000019840000 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=9c484fcb9dba01d2b0deeb2d0586d7d3 XMM03=047e8416875bec314012a0d7fd02030c XMM04=4825a430f41234911a68d43d12a6a8c7 XMM05=000000000000000000000000000000ff XMM06=04258416871234311a12a03d1202030c XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000