[ 30.843279] BUG: Bad rss-counter state mm:00000000f1a22ee0 type:MM_FILEPAGES val:33 [ 30.845155] BUG: Bad rss-counter state mm:00000000f1a22ee0 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.989352] ================================================================== [ 30.990307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.991263] Read of size 8 at addr ffff88800c9ce140 by task sshd/220 [ 30.992036] [ 30.992260] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.993357] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.994404] Call Trace: [ 30.994727] [ 30.995030] dump_stack_lvl+0x91/0xf0 [ 30.995531] print_report+0xcc/0x620 [ 30.996023] ? __virt_addr_valid+0x102/0x340 [ 30.996573] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997194] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997811] kasan_report+0xbe/0xf0 [ 30.998300] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998921] vma_interval_tree_remove+0xc75/0xec0 [ 30.999523] vma_prepare+0xc54/0x11a0 [ 31.000001] __split_vma+0x5af/0x950 [ 31.000476] ? __pfx___split_vma+0x10/0x10 [ 31.001005] ? find_held_lock+0x2c/0x110 [ 31.001527] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.002100] ? lock_is_held_type+0x9f/0x120 [ 31.002639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.003238] ? mtree_range_walk+0x632/0x900 [ 31.003784] ? mas_walk+0x5c7/0x7c0 [ 31.004254] do_vmi_munmap+0x1f1/0x2b0 [ 31.004743] mmap_region+0x1f9/0x2660 [ 31.005229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.005748] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.006478] ? __pfx_lock_acquire+0x10/0x10 [ 31.007006] ? __pfx_mmap_region+0x10/0x10 [ 31.007538] ? security_mmap_addr+0x7d/0xa0 [ 31.008077] ? get_unmapped_area+0x1f5/0x3f0 [ 31.008625] do_mmap+0x854/0xf00 [ 31.009059] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.009553] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.010124] ksys_mmap_pgoff+0x3af/0x500 [ 31.010630] do_syscall_64+0x3f/0x90 [ 31.011105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.011749] RIP: 0033:0x7f7dc233cd82 [ 31.012204] 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 [ 31.014318] RSP: 002b:00007ffd79642818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.015210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dc233cd82 [ 31.016055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dc1776000 [ 31.016888] RBP: 00007f7dc1776000 R08: 0000000000000009 R09: 0000000000001000 [ 31.017724] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601eed8ed90 [ 31.018594] R13: 00007ffd79642830 R14: 00007ffd79642860 R15: 00007ffd79642bc0 [ 31.019456] [ 31.019743] [ 31.019956] Allocated by task 213: [ 31.020385] kasan_save_stack+0x22/0x50 [ 31.020891] kasan_set_track+0x25/0x30 [ 31.021389] __kasan_slab_alloc+0x59/0x70 [ 31.021916] kmem_cache_alloc+0x16b/0x370 [ 31.022439] vm_area_dup+0x20/0x160 [ 31.022890] __split_vma+0x170/0x950 [ 31.023349] split_vma+0xc6/0x110 [ 31.023789] mprotect_fixup+0x8d2/0xb30 [ 31.024293] do_mprotect_pkey+0x87e/0xd40 [ 31.024810] __x64_sys_mprotect+0x78/0xc0 [ 31.025330] do_syscall_64+0x3f/0x90 [ 31.025805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.026463] [ 31.026680] Freed by task 213: [ 31.027078] kasan_save_stack+0x22/0x50 [ 31.027589] kasan_set_track+0x25/0x30 [ 31.028080] kasan_save_free_info+0x2b/0x50 [ 31.028613] __kasan_slab_free+0x10a/0x190 [ 31.029144] kmem_cache_free+0x10d/0x4d0 [ 31.029650] rcu_core+0x8c8/0x2860 [ 31.030101] __do_softirq+0x1b7/0x7d4 [ 31.030582] [ 31.030796] Last potentially related work creation: [ 31.031381] kasan_save_stack+0x22/0x50 [ 31.031877] __kasan_record_aux_stack+0x8e/0xa0 [ 31.032449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.033098] remove_vma+0x139/0x170 [ 31.033619] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.034208] do_vmi_munmap+0x1f1/0x2b0 [ 31.034694] __vm_munmap+0x138/0x3a0 [ 31.035160] __x64_sys_munmap+0x59/0x80 [ 31.035654] do_syscall_64+0x3f/0x90 [ 31.036131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036766] [ 31.036979] The buggy address belongs to the object at ffff88800c9ce0e8 [ 31.036979] which belongs to the cache vm_area_struct of size 168 [ 31.038455] The buggy address is located 88 bytes inside of [ 31.038455] freed 168-byte region [ffff88800c9ce0e8, ffff88800c9ce190) [ 31.039851] [ 31.040072] The buggy address belongs to the physical page: [ 31.040729] page:00000000325dc7b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9ce [ 31.041813] memcg:ffff888015a4e201 [ 31.042245] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.042892] page_type: 0xffffffff() [ 31.043346] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.044270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a4e201 [ 31.045173] page dumped because: kasan: bad access detected [ 31.045831] [ 31.046059] Memory state around the buggy address: [ 31.046643] ffff88800c9ce000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.047489] ffff88800c9ce080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.048339] >ffff88800c9ce100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.049184] ^ [ 31.049837] ffff88800c9ce180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.050699] ffff88800c9ce200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.051556] ================================================================== [ 31.052495] Disabling lock debugging due to kernel taint [ 32.932274] BUG: Bad rss-counter state mm:000000005b2862d6 type:MM_FILEPAGES val:33 [ 32.933264] BUG: Bad rss-counter state mm:000000005b2862d6 type:MM_ANONPAGES val:22 [ 33.418509] BUG: Bad rss-counter state mm:000000002e6a4fe0 type:MM_FILEPAGES val:33 [ 33.419752] BUG: Bad rss-counter state mm:000000002e6a4fe0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63724' (ECDSA) to the list of known hosts. 2023/06/20 17:40:19 fuzzer started 2023/06/20 17:40:19 dialing manager at localhost:36067 2023/06/20 17:40:19 checking machine... 2023/06/20 17:40:19 checking revisions... [ 34.136460] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:40:19 testing simple program... [ 34.189305] cgroup: Unknown subsys name 'net' [ 34.252462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:40:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000002f7 RCX=00007f0aad1c7320 RDX=00007f0aad1c6d4c RSI=00007ffd79d59568 RDI=00007f0aaba6ec30 RBP=000055a42178d290 RSP=00007ffd79d595b8 R8 =0000000000000038 R9 =00000000000aec30 R10=0000000000000002 R11=00007f0aabaf3688 R12=00000000000aec30 R13=00007ffd79d595e8 R14=0000000000133648 R15=00007f0aaba6ec30 RIP=00007f0aad151743 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0aac5d5900 00000000 00000000 GS =0000 0000000000000000 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=00007f0aaba14f70 CR3=000000000a03e000 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=000000000011b540b3285ca56c489dff XMM01=e433ec549c5750bcf047af21ef52b1c3 XMM02=000000000011b818ec2efd57dc4c00df XMM03=00000000001221d8b10dfbc7e39083ad XMM04=3c89b5f45439d92c00000000000ae988 XMM05=30a4fbdc16531d8e0000000000132bb8 XMM06=4fda316b135da52b0000000000131c70 XMM07=e042d86d42eb936e00000000001224b0 XMM08=b10dfbc7e39083ad000000000011b878 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810711 RSP=ffff88800f8bf8e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=0000000000000001 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 00007fa4c5e91900 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=00007fa4c6448618 CR3=0000000009d70000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000