[ 29.968823] BUG: Bad rss-counter state mm:00000000fe332beb type:MM_FILEPAGES val:33 [ 29.970223] BUG: Bad rss-counter state mm:00000000fe332beb type:MM_ANONPAGES val:22 [ 30.139541] ================================================================== [ 30.140457] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.141416] Read of size 8 at addr ffff88800c7b25c8 by task sshd/219 [ 30.142270] [ 30.142505] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.143376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.144446] Call Trace: [ 30.144765] [ 30.145051] dump_stack_lvl+0x91/0xf0 [ 30.145545] print_report+0xcc/0x620 [ 30.146031] ? __virt_addr_valid+0x102/0x340 [ 30.146591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.147208] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.147833] kasan_report+0xbe/0xf0 [ 30.148313] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.148933] vma_interval_tree_remove+0xc75/0xec0 [ 30.149534] vma_prepare+0xc54/0x11a0 [ 30.150011] __split_vma+0x5af/0x950 [ 30.150490] ? __pfx___split_vma+0x10/0x10 [ 30.151028] ? find_held_lock+0x2c/0x110 [ 30.151660] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.152352] ? lock_is_held_type+0x9f/0x120 [ 30.153008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.153747] ? mtree_range_walk+0x632/0x900 [ 30.154406] ? mas_walk+0x5c7/0x7c0 [ 30.154975] do_vmi_munmap+0x1f1/0x2b0 [ 30.155597] mmap_region+0x1f9/0x2660 [ 30.156178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.156804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.157673] ? __pfx_lock_acquire+0x10/0x10 [ 30.158315] ? __pfx_mmap_region+0x10/0x10 [ 30.158957] ? security_mmap_addr+0x7d/0xa0 [ 30.159616] ? get_unmapped_area+0x1f5/0x3f0 [ 30.160284] do_mmap+0x854/0xf00 [ 30.160818] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.161428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.162113] ksys_mmap_pgoff+0x3af/0x500 [ 30.162730] do_syscall_64+0x3f/0x90 [ 30.163306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.164106] RIP: 0033:0x7f667d59dd82 [ 30.164666] 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 [ 30.167289] RSP: 002b:00007ffeb3392608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.168416] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f667d59dd82 [ 30.169457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f667c9d7000 [ 30.170504] RBP: 00007f667c9d7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.171541] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ecc0d0980 [ 30.172561] R13: 00007ffeb3392620 R14: 00007ffeb3392650 R15: 00007ffeb33929b0 [ 30.173622] [ 30.173972] [ 30.174230] Allocated by task 212: [ 30.174748] kasan_save_stack+0x22/0x50 [ 30.175363] kasan_set_track+0x25/0x30 [ 30.175986] __kasan_slab_alloc+0x59/0x70 [ 30.176621] kmem_cache_alloc+0x16b/0x370 [ 30.177263] vm_area_dup+0x20/0x160 [ 30.177824] __split_vma+0x170/0x950 [ 30.178394] split_vma+0xc6/0x110 [ 30.178923] mprotect_fixup+0x8d2/0xb30 [ 30.179535] do_mprotect_pkey+0x87e/0xd40 [ 30.180163] __x64_sys_mprotect+0x78/0xc0 [ 30.180800] do_syscall_64+0x3f/0x90 [ 30.181381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.182161] [ 30.182424] Freed by task 209: [ 30.182911] kasan_save_stack+0x22/0x50 [ 30.183547] kasan_set_track+0x25/0x30 [ 30.184144] kasan_save_free_info+0x2b/0x50 [ 30.184789] __kasan_slab_free+0x10a/0x190 [ 30.185433] kmem_cache_free+0x10d/0x4d0 [ 30.186050] rcu_core+0x8c8/0x2860 [ 30.186593] __do_softirq+0x1b7/0x7d4 [ 30.187173] [ 30.187452] Last potentially related work creation: [ 30.188163] kasan_save_stack+0x22/0x50 [ 30.188771] __kasan_record_aux_stack+0x8e/0xa0 [ 30.189468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.190248] remove_vma+0x139/0x170 [ 30.190800] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.191479] do_vmi_munmap+0x1f1/0x2b0 [ 30.192069] __vm_munmap+0x138/0x3a0 [ 30.192631] __x64_sys_munmap+0x59/0x80 [ 30.193229] do_syscall_64+0x3f/0x90 [ 30.193810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.194592] [ 30.194856] The buggy address belongs to the object at ffff88800c7b2570 [ 30.194856] which belongs to the cache vm_area_struct of size 168 [ 30.196654] The buggy address is located 88 bytes inside of [ 30.196654] freed 168-byte region [ffff88800c7b2570, ffff88800c7b2618) [ 30.198330] [ 30.198591] The buggy address belongs to the physical page: [ 30.199390] page:000000005859ebfa refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c7b2910 pfn:0xc7b2 [ 30.200877] memcg:ffff888015861b01 [ 30.201390] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.202232] page_type: 0xffffffff() [ 30.202778] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.203908] raw: ffff88800c7b2910 000000008011000e 00000001ffffffff ffff888015861b01 [ 30.205007] page dumped because: kasan: bad access detected [ 30.205798] [ 30.206057] Memory state around the buggy address: [ 30.206759] ffff88800c7b2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.207798] ffff88800c7b2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.208823] >ffff88800c7b2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.209848] ^ [ 30.210657] ffff88800c7b2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.211709] ffff88800c7b2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.212745] ================================================================== [ 30.214010] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.251555] BUG: Bad rss-counter state mm:00000000eceac6b4 type:MM_FILEPAGES val:33 [ 32.252590] BUG: Bad rss-counter state mm:00000000eceac6b4 type:MM_ANONPAGES val:22 [ 32.752557] BUG: Bad rss-counter state mm:0000000073734eb8 type:MM_FILEPAGES val:33 [ 32.753744] BUG: Bad rss-counter state mm:0000000073734eb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29450' (ECDSA) to the list of known hosts. 2023/06/19 23:41:47 fuzzer started 2023/06/19 23:41:48 dialing manager at localhost:44161 2023/06/19 23:41:48 checking machine... 2023/06/19 23:41:48 checking revisions... [ 33.458014] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:41:48 testing simple program... [ 33.503083] cgroup: Unknown subsys name 'net' [ 33.568404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:41:41 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff81847451 RDX=dffffc0000000000 RSI=0000000000008474 RDI=ffff8880102575a0 RBP=ffff8880102575f8 RSP=ffff888010257530 R8 =ffffffff8613daa0 R9 =ffff8880102575e0 R10=0000000000038001 R11=0000000000021e78 R12=ffff888010257600 R13=ffff8880102575e8 R14=ffff8880102575e1 R15=ffff8880102575a0 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007f9ca78dd900 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=00007ffeb65df000 CR3=000000000cad6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f9ca7e950b0 CR3=000000000dc56000 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=2037343a31343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000