[ 24.258249] BUG: Bad rss-counter state mm:00000000fe6cd63b type:MM_FILEPAGES val:33 [ 24.259626] BUG: Bad rss-counter state mm:00000000fe6cd63b type:MM_ANONPAGES val:22 [ 24.317486] ================================================================== [ 24.318479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.319430] Read of size 8 at addr ffff88800c66b4e0 by task sshd/220 [ 24.320308] [ 24.320534] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.321396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.322392] Call Trace: [ 24.322709] [ 24.322994] dump_stack_lvl+0x91/0xf0 [ 24.323485] print_report+0xcc/0x620 [ 24.323967] ? __virt_addr_valid+0x102/0x340 [ 24.324547] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.325169] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.325783] kasan_report+0xbe/0xf0 [ 24.326262] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.326890] vma_interval_tree_remove+0xc75/0xec0 [ 24.327488] vma_prepare+0xc54/0x11a0 [ 24.327971] __split_vma+0x5af/0x950 [ 24.328454] ? __pfx___split_vma+0x10/0x10 [ 24.328987] ? find_held_lock+0x2c/0x110 [ 24.329514] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.330080] ? lock_is_held_type+0x9f/0x120 [ 24.330622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.331237] ? mtree_range_walk+0x632/0x900 [ 24.331795] ? mas_walk+0x5c7/0x7c0 [ 24.332277] do_vmi_munmap+0x1f1/0x2b0 [ 24.332786] mmap_region+0x1f9/0x2660 [ 24.333273] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.333787] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.334504] ? __pfx_lock_acquire+0x10/0x10 [ 24.335043] ? __pfx_mmap_region+0x10/0x10 [ 24.335581] ? security_mmap_addr+0x7d/0xa0 [ 24.336120] ? get_unmapped_area+0x1f5/0x3f0 [ 24.336692] do_mmap+0x854/0xf00 [ 24.337179] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.337780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.338354] ksys_mmap_pgoff+0x3af/0x500 [ 24.338866] do_syscall_64+0x3f/0x90 [ 24.339347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.340009] RIP: 0033:0x7f3389916d82 [ 24.340479] 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 [ 24.342612] RSP: 002b:00007ffcc90854e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.343522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3389916d82 [ 24.344393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3388d50000 [ 24.345250] RBP: 00007f3388d50000 R08: 0000000000000009 R09: 0000000000001000 [ 24.346220] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622082ccec0 [ 24.347209] R13: 00007ffcc9085500 R14: 00007ffcc9085530 R15: 00007ffcc9085890 [ 24.348211] [ 24.348562] [ 24.348814] Allocated by task 212: [ 24.349314] kasan_save_stack+0x22/0x50 [ 24.349935] kasan_set_track+0x25/0x30 [ 24.350526] __kasan_slab_alloc+0x59/0x70 [ 24.351135] kmem_cache_alloc+0x16b/0x370 [ 24.351774] vm_area_dup+0x20/0x160 [ 24.352325] __split_vma+0x170/0x950 [ 24.352875] split_vma+0xc6/0x110 [ 24.353395] mprotect_fixup+0x8d2/0xb30 [ 24.353994] do_mprotect_pkey+0x87e/0xd40 [ 24.354611] __x64_sys_mprotect+0x78/0xc0 [ 24.355220] do_syscall_64+0x3f/0x90 [ 24.355783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.356547] [ 24.356805] Freed by task 212: [ 24.357275] kasan_save_stack+0x22/0x50 [ 24.357872] kasan_set_track+0x25/0x30 [ 24.358457] kasan_save_free_info+0x2b/0x50 [ 24.359116] __kasan_slab_free+0x10a/0x190 [ 24.359774] kmem_cache_free+0x10d/0x4d0 [ 24.360441] rcu_core+0x8c8/0x2860 [ 24.360978] __do_softirq+0x1b7/0x7d4 [ 24.361568] [ 24.361831] Last potentially related work creation: [ 24.362544] kasan_save_stack+0x22/0x50 [ 24.363149] __kasan_record_aux_stack+0x8e/0xa0 [ 24.363850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.364660] remove_vma+0x139/0x170 [ 24.365218] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.365907] do_vmi_munmap+0x1f1/0x2b0 [ 24.366503] __vm_munmap+0x138/0x3a0 [ 24.367066] __x64_sys_munmap+0x59/0x80 [ 24.367678] do_syscall_64+0x3f/0x90 [ 24.368254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.369058] [ 24.369315] The buggy address belongs to the object at ffff88800c66b488 [ 24.369315] which belongs to the cache vm_area_struct of size 168 [ 24.371120] The buggy address is located 88 bytes inside of [ 24.371120] freed 168-byte region [ffff88800c66b488, ffff88800c66b530) [ 24.372846] [ 24.373108] The buggy address belongs to the physical page: [ 24.373914] page:000000001decac8e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc66b [ 24.375228] memcg:ffff88800ee24301 [ 24.375737] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.376598] page_type: 0xffffffff() [ 24.377145] raw: 0100000000000200 ffff8880087a0c80 ffffea000051e840 dead000000000007 [ 24.378266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee24301 [ 24.379371] page dumped because: kasan: bad access detected [ 24.380165] [ 24.380432] Memory state around the buggy address: [ 24.381147] ffff88800c66b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.382190] ffff88800c66b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.383245] >ffff88800c66b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.384279] ^ [ 24.385214] ffff88800c66b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.386253] ffff88800c66b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.387290] ================================================================== [ 24.388545] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.417429] BUG: Bad rss-counter state mm:00000000fa755d18 type:MM_FILEPAGES val:33 [ 26.418529] BUG: Bad rss-counter state mm:00000000fa755d18 type:MM_ANONPAGES val:22 [ 26.951285] BUG: Bad rss-counter state mm:0000000015a47129 type:MM_FILEPAGES val:33 [ 26.952463] BUG: Bad rss-counter state mm:0000000015a47129 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25552' (ECDSA) to the list of known hosts. 2023/06/20 16:39:06 fuzzer started 2023/06/20 16:39:06 dialing manager at localhost:36067 2023/06/20 16:39:06 checking machine... 2023/06/20 16:39:06 checking revisions... [ 27.611016] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:39:06 testing simple program... [ 27.654335] cgroup: Unknown subsys name 'net' [ 27.710657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:39:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=1ffffffff0aca581 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015f2f420 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f357b3bcfef R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000000 RIP=ffffffff814c84cb 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 00007f3572579700 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=00007fe4c2597cd0 CR3=0000000016fe0000 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=2035303a39333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39333a3631203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00003f7340 RBX=ffff88800fdcd500 RCX=ffffea00003f7201 RDX=ffff88808fdcd500 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff888018eefa38 R8 =ffff88800fdcd500 R9 =0000000000000000 R10=ffffffff85d3d357 R11=000000000010000f R12=dffffc0000000000 R13=ffff888018eefa78 R14=0000000000000000 R15=ffff888008eb2000 RIP=ffffffff81810393 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 00007f99c9f48900 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=00007ffeecea0000 CR3=0000000016686000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000