[ 24.068943] BUG: Bad rss-counter state mm:00000000a5d3605d type:MM_FILEPAGES val:33 [ 24.069978] BUG: Bad rss-counter state mm:00000000a5d3605d type:MM_ANONPAGES val:22 [ 24.232639] ================================================================== [ 24.233572] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.234525] Read of size 8 at addr ffff88800dc6b5c8 by task sshd/219 [ 24.235322] [ 24.235567] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.236561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.237555] Call Trace: [ 24.237879] [ 24.238167] dump_stack_lvl+0x91/0xf0 [ 24.238664] print_report+0xcc/0x620 [ 24.239153] ? __virt_addr_valid+0x102/0x340 [ 24.239743] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.240375] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.241013] kasan_report+0xbe/0xf0 [ 24.241490] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.242121] vma_interval_tree_remove+0xc75/0xec0 [ 24.242733] vma_prepare+0xc54/0x11a0 [ 24.243224] __split_vma+0x5af/0x950 [ 24.243731] ? __pfx___split_vma+0x10/0x10 [ 24.244260] ? find_held_lock+0x2c/0x110 [ 24.244779] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.245353] ? lock_is_held_type+0x9f/0x120 [ 24.245904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.246523] ? mtree_range_walk+0x632/0x900 [ 24.247072] ? mas_walk+0x5c7/0x7c0 [ 24.247569] do_vmi_munmap+0x1f1/0x2b0 [ 24.248065] mmap_region+0x1f9/0x2660 [ 24.248549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.249061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.249778] ? __pfx_lock_acquire+0x10/0x10 [ 24.250314] ? __pfx_mmap_region+0x10/0x10 [ 24.250843] ? security_mmap_addr+0x7d/0xa0 [ 24.251378] ? get_unmapped_area+0x1f5/0x3f0 [ 24.251946] do_mmap+0x854/0xf00 [ 24.252387] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.252888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.253455] ksys_mmap_pgoff+0x3af/0x500 [ 24.253964] do_syscall_64+0x3f/0x90 [ 24.254441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.255088] RIP: 0033:0x7fa104a87d82 [ 24.255549] 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 [ 24.257701] RSP: 002b:00007fffb02191a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.258622] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa104a87d82 [ 24.259489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa103ec1000 [ 24.260334] RBP: 00007fa103ec1000 R08: 0000000000000009 R09: 0000000000001000 [ 24.261182] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ea34c6ec0 [ 24.262027] R13: 00007fffb02191c0 R14: 00007fffb02191f0 R15: 00007fffb0219550 [ 24.262900] [ 24.263199] [ 24.263429] Allocated by task 212: [ 24.263858] kasan_save_stack+0x22/0x50 [ 24.264367] kasan_set_track+0x25/0x30 [ 24.264859] __kasan_slab_alloc+0x59/0x70 [ 24.265396] kmem_cache_alloc+0x16b/0x370 [ 24.265925] vm_area_dup+0x20/0x160 [ 24.266383] __split_vma+0x170/0x950 [ 24.266848] split_vma+0xc6/0x110 [ 24.267297] mprotect_fixup+0x8d2/0xb30 [ 24.267815] do_mprotect_pkey+0x87e/0xd40 [ 24.268334] __x64_sys_mprotect+0x78/0xc0 [ 24.268857] do_syscall_64+0x3f/0x90 [ 24.269338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.269978] [ 24.270192] Freed by task 212: [ 24.270583] kasan_save_stack+0x22/0x50 [ 24.271084] kasan_set_track+0x25/0x30 [ 24.271597] kasan_save_free_info+0x2b/0x50 [ 24.272140] __kasan_slab_free+0x10a/0x190 [ 24.272675] kmem_cache_free+0x10d/0x4d0 [ 24.273203] rcu_core+0x8c8/0x2860 [ 24.273655] __do_softirq+0x1b7/0x7d4 [ 24.274139] [ 24.274364] Last potentially related work creation: [ 24.274956] kasan_save_stack+0x22/0x50 [ 24.275470] __kasan_record_aux_stack+0x8e/0xa0 [ 24.276048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.276693] remove_vma+0x139/0x170 [ 24.277151] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.277727] do_vmi_munmap+0x1f1/0x2b0 [ 24.278229] __vm_munmap+0x138/0x3a0 [ 24.278702] __x64_sys_munmap+0x59/0x80 [ 24.279215] do_syscall_64+0x3f/0x90 [ 24.279717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.280361] [ 24.280582] The buggy address belongs to the object at ffff88800dc6b570 [ 24.280582] which belongs to the cache vm_area_struct of size 168 [ 24.282092] The buggy address is located 88 bytes inside of [ 24.282092] freed 168-byte region [ffff88800dc6b570, ffff88800dc6b618) [ 24.283520] [ 24.283736] The buggy address belongs to the physical page: [ 24.284415] page:00000000c223cc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc6b [ 24.285527] memcg:ffff88800ec79501 [ 24.285967] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.286631] page_type: 0xffffffff() [ 24.287099] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.288046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec79501 [ 24.288968] page dumped because: kasan: bad access detected [ 24.289633] [ 24.289854] Memory state around the buggy address: [ 24.290454] ffff88800dc6b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.291330] ffff88800dc6b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.292221] >ffff88800dc6b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.293097] ^ [ 24.293783] ffff88800dc6b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.294655] ffff88800dc6b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.295539] ================================================================== [ 24.296651] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.025436] BUG: Bad rss-counter state mm:00000000a17fa65d type:MM_FILEPAGES val:33 [ 26.026171] BUG: Bad rss-counter state mm:00000000a17fa65d type:MM_ANONPAGES val:22 [ 26.436901] BUG: Bad rss-counter state mm:00000000af3fd049 type:MM_FILEPAGES val:33 [ 26.438269] BUG: Bad rss-counter state mm:00000000af3fd049 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37501' (ECDSA) to the list of known hosts. 2023/06/20 14:41:20 fuzzer started 2023/06/20 14:41:20 dialing manager at localhost:36067 2023/06/20 14:41:20 checking machine... 2023/06/20 14:41:20 checking revisions... [ 27.179139] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:41:20 testing simple program... [ 27.232984] cgroup: Unknown subsys name 'net' [ 27.267523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:41:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002002b68 RSI=0000000000000185 RDI=ffff888010015b40 RBP=ffffffff849ef3a0 RSP=ffff888016defa50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000185 R13=ffff8880100151c0 R14=ffff8880100151c0 R15=ffff888016defd90 RIP=ffffffff8122e843 RFL=00000212 [----A--] 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 00007fb6b6e1f900 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=00007fb6b73d6618 CR3=00000000099b0000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fee4b6709d0 CR3=00000000093a6000 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=4f0e3e2209402ea35e4a92dec014ddec XMM02=000000000011a010eff9b2d0a8fce9cb XMM03=000000000011a0e02c67c8bc2e329bc3 XMM04=c904dfb8ca7ba9b300000000000ae988 XMM05=dfcdbad4f1609c370000000000130a10 XMM06=45a5a0b8f205c373000000000012fbe8 XMM07=e042d86d42eb936e0000000000121188 XMM08=1bc1e8bce7bef74a000000000011a0e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000