[ 36.035615] BUG: Bad rss-counter state mm:00000000d8299db0 type:MM_FILEPAGES val:33 [ 36.037108] BUG: Bad rss-counter state mm:00000000d8299db0 type:MM_ANONPAGES val:22 [ 36.198391] ================================================================== [ 36.200864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.203555] Read of size 8 at addr ffff88800ddf4df0 by task sshd/221 [ 36.205572] [ 36.206077] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.208330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.210569] Call Trace: [ 36.211263] [ 36.211912] dump_stack_lvl+0x91/0xf0 [ 36.213006] print_report+0xcc/0x620 [ 36.213993] ? __virt_addr_valid+0x102/0x340 [ 36.215186] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.216546] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.217881] kasan_report+0xbe/0xf0 [ 36.218827] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.220235] vma_interval_tree_remove+0xc75/0xec0 [ 36.221532] vma_prepare+0xc54/0x11a0 [ 36.222554] __split_vma+0x5af/0x950 [ 36.223590] ? __pfx___split_vma+0x10/0x10 [ 36.224819] ? find_held_lock+0x2c/0x110 [ 36.225924] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.227139] ? lock_is_held_type+0x9f/0x120 [ 36.229209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.230513] ? mtree_range_walk+0x632/0x900 [ 36.231634] ? mas_walk+0x5c7/0x7c0 [ 36.232642] do_vmi_munmap+0x1f1/0x2b0 [ 36.233608] mmap_region+0x1f9/0x2660 [ 36.234523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.235520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.236961] ? __pfx_lock_acquire+0x10/0x10 [ 36.238005] ? __pfx_mmap_region+0x10/0x10 [ 36.239036] ? security_mmap_addr+0x7d/0xa0 [ 36.240069] ? get_unmapped_area+0x1f5/0x3f0 [ 36.241177] do_mmap+0x854/0xf00 [ 36.242008] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.242955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.244035] ksys_mmap_pgoff+0x3af/0x500 [ 36.245063] do_syscall_64+0x3f/0x90 [ 36.245982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.247254] RIP: 0033:0x7f3ab5f2ad82 [ 36.248152] 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 [ 36.252656] RSP: 002b:00007ffe7f88b3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.254634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ab5f2ad82 [ 36.256480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ab5364000 [ 36.258314] RBP: 00007f3ab5364000 R08: 0000000000000009 R09: 0000000000001000 [ 36.260127] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574d2b4cec0 [ 36.261916] R13: 00007ffe7f88b3d0 R14: 00007ffe7f88b400 R15: 00007ffe7f88b760 [ 36.263798] [ 36.264433] [ 36.264864] Allocated by task 210: [ 36.265764] kasan_save_stack+0x22/0x50 [ 36.266798] kasan_set_track+0x25/0x30 [ 36.267790] __kasan_slab_alloc+0x59/0x70 [ 36.268843] kmem_cache_alloc+0x16b/0x370 [ 36.269844] vm_area_dup+0x20/0x160 [ 36.270714] __split_vma+0x170/0x950 [ 36.271623] split_vma+0xc6/0x110 [ 36.272496] mprotect_fixup+0x8d2/0xb30 [ 36.273467] do_mprotect_pkey+0x87e/0xd40 [ 36.274475] __x64_sys_mprotect+0x78/0xc0 [ 36.275496] do_syscall_64+0x3f/0x90 [ 36.276433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.277721] [ 36.278106] Freed by task 202: [ 36.278827] kasan_save_stack+0x22/0x50 [ 36.279787] kasan_set_track+0x25/0x30 [ 36.280690] kasan_save_free_info+0x2b/0x50 [ 36.281770] __kasan_slab_free+0x10a/0x190 [ 36.282880] kmem_cache_free+0x10d/0x4d0 [ 36.283901] rcu_core+0x8c8/0x2860 [ 36.284805] __do_softirq+0x1b7/0x7d4 [ 36.285708] [ 36.286139] Last potentially related work creation: [ 36.287466] kasan_save_stack+0x22/0x50 [ 36.288490] __kasan_record_aux_stack+0x8e/0xa0 [ 36.289694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.291054] remove_vma+0x139/0x170 [ 36.291911] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.293011] do_vmi_munmap+0x1f1/0x2b0 [ 36.293956] __vm_munmap+0x138/0x3a0 [ 36.294837] __x64_sys_munmap+0x59/0x80 [ 36.295841] do_syscall_64+0x3f/0x90 [ 36.296783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.298067] [ 36.298460] Second to last potentially related work creation: [ 36.299872] kasan_save_stack+0x22/0x50 [ 36.300882] __kasan_record_aux_stack+0x8e/0xa0 [ 36.302052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.303320] remove_vma+0x139/0x170 [ 36.304264] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.305368] do_vmi_munmap+0x1f1/0x2b0 [ 36.306328] mmap_region+0x1f9/0x2660 [ 36.307238] do_mmap+0x854/0xf00 [ 36.308113] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.309076] ksys_mmap_pgoff+0x3af/0x500 [ 36.310043] do_syscall_64+0x3f/0x90 [ 36.310905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.312141] [ 36.312571] The buggy address belongs to the object at ffff88800ddf4d98 [ 36.312571] which belongs to the cache vm_area_struct of size 168 [ 36.315621] The buggy address is located 88 bytes inside of [ 36.315621] freed 168-byte region [ffff88800ddf4d98, ffff88800ddf4e40) [ 36.318629] [ 36.319053] The buggy address belongs to the physical page: [ 36.320476] page:00000000070aa516 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddf4 [ 36.322699] memcg:ffff88800dcda201 [ 36.323291] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.323757] page_type: 0xffffffff() [ 36.324090] raw: 0100000000000200 ffff88800879fc80 ffffea0000319140 dead000000000002 [ 36.324755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcda201 [ 36.325389] page dumped because: kasan: bad access detected [ 36.325847] [ 36.326004] Memory state around the buggy address: [ 36.326412] ffff88800ddf4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.327006] ffff88800ddf4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.327603] >ffff88800ddf4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.328205] ^ [ 36.328766] ffff88800ddf4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.329361] ffff88800ddf4e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.329949] ================================================================== [ 36.330786] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.938713] BUG: Bad rss-counter state mm:00000000d61dc75e type:MM_FILEPAGES val:33 [ 38.939430] BUG: Bad rss-counter state mm:00000000d61dc75e type:MM_ANONPAGES val:22 [ 39.456544] BUG: Bad rss-counter state mm:0000000091c1d7c9 type:MM_FILEPAGES val:33 [ 39.457568] BUG: Bad rss-counter state mm:0000000091c1d7c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30063' (ECDSA) to the list of known hosts. 2023/06/20 08:16:54 fuzzer started 2023/06/20 08:16:55 dialing manager at localhost:44161 2023/06/20 08:16:55 checking machine... 2023/06/20 08:16:55 checking revisions... [ 40.329828] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:16:55 testing simple program... [ 40.385076] cgroup: Unknown subsys name 'net' [ 40.450651] cgroup: Unknown subsys name 'rlimit' executing program executing program [ 46.615933] BUG: Bad rss-counter state mm:0000000000234caf type:MM_FILEPAGES val:175 [ 46.616650] BUG: Bad rss-counter state mm:0000000000234caf type:MM_ANONPAGES val:50 executing program VM DIAGNOSIS: 08:16:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fb68b230699 RCX=ffffffff813a0a8d RDX=ffff8880168351c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88800ede77a8 R8 =0000000000000006 R9 =00007fb68b230699 R10=ffffffffffffffff R11=00000000000b6996 R12=ffff88800ede78e8 R13=0000000000000000 R14=ffff8880168351c0 R15=ffff888015863e00 RIP=ffffffff814c01fc 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 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=00007fb68b13d328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=000000000019d765 RBX=ffff88806cf35000 RCX=ffffffff8153457f RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450c1c4 RSP=ffff88806cf09948 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b923 RFL=00000046 [---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=00007f54a14d0010 CR3=000000000c70e000 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=6ef8418135006e8c0d4e984ddda1e997 XMM02=2c67c8bc2e329bc3000000000011d470 XMM03=fb795ef6d65770560000000000123720 XMM04=75f4c78274d7569300000000000ae988 XMM05=19e9129bd510f2350000000000134678 XMM06=4fda316b135da52b0000000000134500 XMM07=e042d86d42eb936e00000000001239a0 XMM08=9a391b4091bbe3e8000000000011d4d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000