[ 30.927131] BUG: Bad rss-counter state mm:000000008f868876 type:MM_FILEPAGES val:33 [ 30.928705] BUG: Bad rss-counter state mm:000000008f868876 type:MM_ANONPAGES val:22 [ 31.101807] ================================================================== [ 31.102798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.103802] Read of size 8 at addr ffff88800f6535c8 by task sshd/219 [ 31.104719] [ 31.104949] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.105860] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.107026] Call Trace: [ 31.107428] [ 31.107763] dump_stack_lvl+0x91/0xf0 [ 31.108347] print_report+0xcc/0x620 [ 31.108922] ? __virt_addr_valid+0x102/0x340 [ 31.109574] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111061] kasan_report+0xbe/0xf0 [ 31.111645] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112406] vma_interval_tree_remove+0xc75/0xec0 [ 31.113137] vma_prepare+0xc54/0x11a0 [ 31.113721] __split_vma+0x5af/0x950 [ 31.114293] ? __pfx___split_vma+0x10/0x10 [ 31.114937] ? find_held_lock+0x2c/0x110 [ 31.115595] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.116197] ? lock_is_held_type+0x9f/0x120 [ 31.116774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.117416] ? mtree_range_walk+0x632/0x900 [ 31.118002] ? mas_walk+0x5c7/0x7c0 [ 31.118505] do_vmi_munmap+0x1f1/0x2b0 [ 31.119026] mmap_region+0x1f9/0x2660 [ 31.119553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.120098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.120854] ? __pfx_lock_acquire+0x10/0x10 [ 31.121418] ? __pfx_mmap_region+0x10/0x10 [ 31.121982] ? security_mmap_addr+0x7d/0xa0 [ 31.122545] ? get_unmapped_area+0x1f5/0x3f0 [ 31.123131] do_mmap+0x854/0xf00 [ 31.123603] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.124133] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.124737] ksys_mmap_pgoff+0x3af/0x500 [ 31.125307] do_syscall_64+0x3f/0x90 [ 31.125828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126520] RIP: 0033:0x7f8c0ce09d82 [ 31.127012] 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 [ 31.129412] RSP: 002b:00007fff68a604a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.130428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c0ce09d82 [ 31.131402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c0c243000 [ 31.132375] RBP: 00007f8c0c243000 R08: 0000000000000009 R09: 0000000000001000 [ 31.133345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fb88b4ec0 [ 31.134317] R13: 00007fff68a604c0 R14: 00007fff68a604f0 R15: 00007fff68a60850 [ 31.135311] [ 31.135644] [ 31.135887] Allocated by task 211: [ 31.136378] kasan_save_stack+0x22/0x50 [ 31.136954] kasan_set_track+0x25/0x30 [ 31.137520] __kasan_slab_alloc+0x59/0x70 [ 31.138122] kmem_cache_alloc+0x16b/0x370 [ 31.138712] vm_area_dup+0x20/0x160 [ 31.139254] __split_vma+0x170/0x950 [ 31.139785] split_vma+0xc6/0x110 [ 31.140282] mprotect_fixup+0x8d2/0xb30 [ 31.140853] do_mprotect_pkey+0x87e/0xd40 [ 31.141432] __x64_sys_mprotect+0x78/0xc0 [ 31.142013] do_syscall_64+0x3f/0x90 [ 31.142542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.143283] [ 31.143523] Freed by task 211: [ 31.143963] kasan_save_stack+0x22/0x50 [ 31.144530] kasan_set_track+0x25/0x30 [ 31.145083] kasan_save_free_info+0x2b/0x50 [ 31.145679] __kasan_slab_free+0x10a/0x190 [ 31.146277] kmem_cache_free+0x10d/0x4d0 [ 31.146855] rcu_core+0x8c8/0x2860 [ 31.147373] __do_softirq+0x1b7/0x7d4 [ 31.147907] [ 31.148148] Last potentially related work creation: [ 31.148805] kasan_save_stack+0x22/0x50 [ 31.149369] __kasan_record_aux_stack+0x8e/0xa0 [ 31.150010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.150734] remove_vma+0x139/0x170 [ 31.151248] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.151876] do_vmi_munmap+0x1f1/0x2b0 [ 31.152420] __vm_munmap+0x138/0x3a0 [ 31.152943] __x64_sys_munmap+0x59/0x80 [ 31.153490] do_syscall_64+0x3f/0x90 [ 31.154032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154753] [ 31.154989] Second to last potentially related work creation: [ 31.155774] kasan_save_stack+0x22/0x50 [ 31.156338] __kasan_record_aux_stack+0x8e/0xa0 [ 31.156984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.157699] remove_vma+0x139/0x170 [ 31.158212] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.158841] do_vmi_munmap+0x1f1/0x2b0 [ 31.159398] mmap_region+0x1f9/0x2660 [ 31.159928] do_mmap+0x854/0xf00 [ 31.160488] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.161067] ksys_mmap_pgoff+0x7d/0x500 [ 31.161596] do_syscall_64+0x3f/0x90 [ 31.162097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162783] [ 31.163018] The buggy address belongs to the object at ffff88800f653570 [ 31.163018] which belongs to the cache vm_area_struct of size 168 [ 31.164584] The buggy address is located 88 bytes inside of [ 31.164584] freed 168-byte region [ffff88800f653570, ffff88800f653618) [ 31.166089] [ 31.166315] The buggy address belongs to the physical page: [ 31.167019] page:00000000bc77a648 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf653 [ 31.168210] memcg:ffff88800de60201 [ 31.168664] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.169351] page_type: 0xffffffff() [ 31.169825] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a68c0 000000000000000a [ 31.170795] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de60201 [ 31.171768] page dumped because: kasan: bad access detected [ 31.172464] [ 31.172691] Memory state around the buggy address: [ 31.173328] ffff88800f653480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.174254] ffff88800f653500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.175171] >ffff88800f653580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.176088] ^ [ 31.176790] ffff88800f653600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.177696] ffff88800f653680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.178606] ================================================================== [ 31.179861] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.179099] BUG: Bad rss-counter state mm:00000000b2718730 type:MM_FILEPAGES val:33 [ 33.180272] BUG: Bad rss-counter state mm:00000000b2718730 type:MM_ANONPAGES val:22 [ 33.666110] BUG: Bad rss-counter state mm:0000000097cb2a9b type:MM_FILEPAGES val:33 [ 33.667144] BUG: Bad rss-counter state mm:0000000097cb2a9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58118' (ECDSA) to the list of known hosts. 2023/06/20 11:45:40 fuzzer started 2023/06/20 11:45:40 dialing manager at localhost:36067 2023/06/20 11:45:40 checking machine... 2023/06/20 11:45:40 checking revisions... [ 34.385729] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:45:40 testing simple program... [ 34.430695] cgroup: Unknown subsys name 'net' [ 34.469622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:45:40 Registers: info registers vcpu 0 RAX=1ffffffff0c09ebc RBX=ffffffff8604f5e4 RCX=ffffffff8451105d RDX=0000000000000000 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffffffff8604f5d8 RSP=ffff88806ce099e0 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f5f4 R13=ffffffff8604f5d8 R14=ffffffff8604f5d8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 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=00007f3e6e5d9510 CR3=000000000c5a0000 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=2030343a35343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a35343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a31fab0 RCX=ffff88800844f780 RDX=ffffea000068c7c0 RSI=ffff88801a31f850 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888016db7be8 R8 =ffff88801a31f720 R9 =0000000000000000 R10=ffffea000068c7c0 R11=00000000800d000a R12=dffffc0000000000 R13=ffff888016db7c28 R14=ffff88800844f780 R15=ffff88801a31f850 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f7d4a5ca900 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=00007ffffa70a000 CR3=000000001c98e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000