[ 68.850911] BUG: Bad rss-counter state mm:0000000031b248c0 type:MM_FILEPAGES val:33 [ 68.850942] BUG: Bad rss-counter state mm:0000000031b248c0 type:MM_ANONPAGES val:22 [ 69.073055] ================================================================== [ 69.074134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.075274] Read of size 8 at addr ffff88801a34bd08 by task sshd/221 [ 69.076295] [ 69.076557] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 69.077614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.078841] Call Trace: [ 69.079230] [ 69.079576] dump_stack_lvl+0x91/0xf0 [ 69.080154] print_report+0xcc/0x620 [ 69.080733] ? __virt_addr_valid+0x102/0x340 [ 69.081399] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.082149] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.082906] kasan_report+0xbe/0xf0 [ 69.083479] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.084240] vma_interval_tree_remove+0xc75/0xec0 [ 69.084968] vma_prepare+0xc54/0x11a0 [ 69.085555] __split_vma+0x5af/0x950 [ 69.086128] ? __pfx___split_vma+0x10/0x10 [ 69.086783] ? find_held_lock+0x2c/0x110 [ 69.087406] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.088087] ? lock_is_held_type+0x9f/0x120 [ 69.088734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.089463] ? mtree_range_walk+0x632/0x900 [ 69.090127] ? mas_walk+0x5c7/0x7c0 [ 69.090711] do_vmi_munmap+0x1f1/0x2b0 [ 69.091293] mmap_region+0x1f9/0x2660 [ 69.091880] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.092493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.093366] ? __pfx_lock_acquire+0x10/0x10 [ 69.094014] ? __pfx_mmap_region+0x10/0x10 [ 69.094677] ? security_mmap_addr+0x7d/0xa0 [ 69.095326] ? get_unmapped_area+0x1f5/0x3f0 [ 69.096006] do_mmap+0x854/0xf00 [ 69.096535] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.097139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.097823] ksys_mmap_pgoff+0x3af/0x500 [ 69.098435] do_syscall_64+0x3f/0x90 [ 69.098930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.099566] RIP: 0033:0x7f3502be6d82 [ 69.100005] 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 [ 69.102104] RSP: 002b:00007ffedbe4f428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.103020] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3502be6d82 [ 69.103861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3502020000 [ 69.104692] RBP: 00007f3502020000 R08: 0000000000000009 R09: 0000000000001000 [ 69.105524] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee91b97d90 [ 69.106349] R13: 00007ffedbe4f440 R14: 00007ffedbe4f470 R15: 00007ffedbe4f7d0 [ 69.107218] [ 69.107508] [ 69.107721] Allocated by task 207: [ 69.108139] kasan_save_stack+0x22/0x50 [ 69.108633] kasan_set_track+0x25/0x30 [ 69.109124] __kasan_slab_alloc+0x59/0x70 [ 69.109643] kmem_cache_alloc+0x16b/0x370 [ 69.110161] vm_area_dup+0x20/0x160 [ 69.110607] __split_vma+0x170/0x950 [ 69.111062] split_vma+0xc6/0x110 [ 69.111492] mprotect_fixup+0x8d2/0xb30 [ 69.111990] do_mprotect_pkey+0x87e/0xd40 [ 69.112502] __x64_sys_mprotect+0x78/0xc0 [ 69.113020] do_syscall_64+0x3f/0x90 [ 69.113482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.114112] [ 69.114318] Freed by task 13: [ 69.114711] kasan_save_stack+0x22/0x50 [ 69.115209] kasan_set_track+0x25/0x30 [ 69.115697] kasan_save_free_info+0x2b/0x50 [ 69.116214] __kasan_slab_free+0x10a/0x190 [ 69.116740] kmem_cache_free+0x10d/0x4d0 [ 69.117251] rcu_core+0x8c8/0x2860 [ 69.117691] __do_softirq+0x1b7/0x7d4 [ 69.118150] [ 69.118362] Last potentially related work creation: [ 69.118940] kasan_save_stack+0x22/0x50 [ 69.119432] __kasan_record_aux_stack+0x8e/0xa0 [ 69.119995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.120619] remove_vma+0x139/0x170 [ 69.121067] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.121609] do_vmi_munmap+0x1f1/0x2b0 [ 69.122092] __vm_munmap+0x138/0x3a0 [ 69.122563] __x64_sys_munmap+0x59/0x80 [ 69.123073] do_syscall_64+0x3f/0x90 [ 69.123539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.124170] [ 69.124381] The buggy address belongs to the object at ffff88801a34bcb0 [ 69.124381] which belongs to the cache vm_area_struct of size 168 [ 69.125825] The buggy address is located 88 bytes inside of [ 69.125825] freed 168-byte region [ffff88801a34bcb0, ffff88801a34bd58) [ 69.127213] [ 69.127426] The buggy address belongs to the physical page: [ 69.128067] page:00000000ea9a5e01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a34b [ 69.129148] memcg:ffff88801a2dc901 [ 69.129560] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.130204] page_type: 0xffffffff() [ 69.130648] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.131551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2dc901 [ 69.132455] page dumped because: kasan: bad access detected [ 69.133098] [ 69.133307] Memory state around the buggy address: [ 69.133884] ffff88801a34bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 69.134745] ffff88801a34bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.135597] >ffff88801a34bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.136441] ^ [ 69.136874] ffff88801a34bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 69.137707] ffff88801a34be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 69.138548] ================================================================== [ 69.139544] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 70.953567] BUG: Bad rss-counter state mm:00000000f449d5cd type:MM_FILEPAGES val:33 [ 70.954457] BUG: Bad rss-counter state mm:00000000f449d5cd type:MM_ANONPAGES val:22 [ 71.376941] BUG: Bad rss-counter state mm:000000007884a104 type:MM_FILEPAGES val:33 [ 71.377729] BUG: Bad rss-counter state mm:000000007884a104 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36358' (ECDSA) to the list of known hosts. 2023/06/19 18:42:38 fuzzer started 2023/06/19 18:42:38 dialing manager at localhost:44161 2023/06/19 18:42:38 checking machine... 2023/06/19 18:42:38 checking revisions... [ 72.075791] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:42:38 testing simple program... [ 72.116382] cgroup: Unknown subsys name 'net' [ 72.156152] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800dd37dc0 RCX=0000000000000000 RDX=ffff88800fd20000 RSI=ffffffff83677776 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88800ec87918 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ff00545000000000 R12=ffff888016fc9ec0 R13=0000000000000000 R14=ffff88800ec87a88 R15=00000000000000e8 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 00007f510ed1e900 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=00007ffdfdfd0000 CR3=000000001834e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861ca70c RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff861ca710 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000395e0 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 00007faf0e515900 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=00007f2b859f14d8 CR3=000000000d594000 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=ff0000ffff0000000000000000000000 XMM02=732f70756f7267632f73662f7379732f XMM03=646d65747379732f6563696c732e6d65 XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=00005642fa2a537000005642fa2e2b70 XMM06=00000000000000210000000000000000 XMM07=00000000000000000000000000000000 XMM08=7368746150796c6e4f64616552646e69 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000