[ 23.696150] BUG: Bad rss-counter state mm:00000000c087dafc type:MM_FILEPAGES val:33 [ 23.696719] BUG: Bad rss-counter state mm:00000000c087dafc type:MM_ANONPAGES val:22 [ 23.828419] ================================================================== [ 23.829559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.830732] Read of size 8 at addr ffff88801bc233f8 by task sshd/220 [ 23.831731] [ 23.831851] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.832330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.832871] Call Trace: [ 23.833049] [ 23.833208] dump_stack_lvl+0x91/0xf0 [ 23.833499] print_report+0xcc/0x620 [ 23.833782] ? __virt_addr_valid+0x102/0x340 [ 23.834084] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.834423] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.834770] kasan_report+0xbe/0xf0 [ 23.835032] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.835369] vma_interval_tree_remove+0xc75/0xec0 [ 23.835701] vma_prepare+0xc54/0x11a0 [ 23.835967] __split_vma+0x5af/0x950 [ 23.836224] ? __pfx___split_vma+0x10/0x10 [ 23.836517] ? find_held_lock+0x2c/0x110 [ 23.836812] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.837124] ? lock_is_held_type+0x9f/0x120 [ 23.837421] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.837761] ? mtree_range_walk+0x632/0x900 [ 23.838068] ? mas_walk+0x5c7/0x7c0 [ 23.838330] do_vmi_munmap+0x1f1/0x2b0 [ 23.838607] mmap_region+0x1f9/0x2660 [ 23.838871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.839150] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.839545] ? __pfx_lock_acquire+0x10/0x10 [ 23.839839] ? __pfx_mmap_region+0x10/0x10 [ 23.840128] ? security_mmap_addr+0x7d/0xa0 [ 23.840425] ? get_unmapped_area+0x1f5/0x3f0 [ 23.840738] do_mmap+0x854/0xf00 [ 23.840996] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.841286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.841615] ksys_mmap_pgoff+0x3af/0x500 [ 23.841922] do_syscall_64+0x3f/0x90 [ 23.842195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.842579] RIP: 0033:0x7f9a215e9d82 [ 23.842849] 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 [ 23.844104] RSP: 002b:00007ffef5db98d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.844640] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a215e9d82 [ 23.845143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a20a23000 [ 23.845642] RBP: 00007f9a20a23000 R08: 0000000000000009 R09: 0000000000001000 [ 23.846156] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d802af980 [ 23.846647] R13: 00007ffef5db98f0 R14: 00007ffef5db9920 R15: 00007ffef5db9c80 [ 23.847150] [ 23.847320] [ 23.847445] Allocated by task 207: [ 23.847691] kasan_save_stack+0x22/0x50 [ 23.847986] kasan_set_track+0x25/0x30 [ 23.848279] __kasan_slab_alloc+0x59/0x70 [ 23.848587] kmem_cache_alloc+0x16b/0x370 [ 23.848884] vm_area_dup+0x20/0x160 [ 23.849150] __split_vma+0x170/0x950 [ 23.849434] split_vma+0xc6/0x110 [ 23.849702] mprotect_fixup+0x8d2/0xb30 [ 23.849993] do_mprotect_pkey+0x87e/0xd40 [ 23.850296] __x64_sys_mprotect+0x78/0xc0 [ 23.850608] do_syscall_64+0x3f/0x90 [ 23.850886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.851264] [ 23.851386] Freed by task 19: [ 23.851607] kasan_save_stack+0x22/0x50 [ 23.851907] kasan_set_track+0x25/0x30 [ 23.852191] kasan_save_free_info+0x2b/0x50 [ 23.852505] __kasan_slab_free+0x10a/0x190 [ 23.852813] kmem_cache_free+0x10d/0x4d0 [ 23.853117] rcu_core+0x8c8/0x2860 [ 23.853378] __do_softirq+0x1b7/0x7d4 [ 23.853662] [ 23.853790] Last potentially related work creation: [ 23.854138] kasan_save_stack+0x22/0x50 [ 23.854437] __kasan_record_aux_stack+0x8e/0xa0 [ 23.854767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.855134] remove_vma+0x139/0x170 [ 23.855394] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.855713] do_vmi_munmap+0x1f1/0x2b0 [ 23.856001] __vm_munmap+0x138/0x3a0 [ 23.856269] __x64_sys_munmap+0x59/0x80 [ 23.856557] do_syscall_64+0x3f/0x90 [ 23.856836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.857217] [ 23.857340] The buggy address belongs to the object at ffff88801bc233a0 [ 23.857340] which belongs to the cache vm_area_struct of size 168 [ 23.858211] The buggy address is located 88 bytes inside of [ 23.858211] freed 168-byte region [ffff88801bc233a0, ffff88801bc23448) [ 23.859037] [ 23.859166] The buggy address belongs to the physical page: [ 23.859559] page:00000000b803808b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc23 [ 23.860197] memcg:ffff888019bcc301 [ 23.860449] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.860825] page_type: 0xffffffff() [ 23.861095] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.861630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bcc301 [ 23.862189] page dumped because: kasan: bad access detected [ 23.862579] [ 23.862702] Memory state around the buggy address: [ 23.863045] ffff88801bc23280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.863548] ffff88801bc23300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.864040] >ffff88801bc23380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.864547] ^ [ 23.865045] ffff88801bc23400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.865545] ffff88801bc23480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.866053] ================================================================== [ 23.866702] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.864321] BUG: Bad rss-counter state mm:00000000bec6612b type:MM_FILEPAGES val:33 [ 25.865339] BUG: Bad rss-counter state mm:00000000bec6612b type:MM_ANONPAGES val:22 [ 26.310864] BUG: Bad rss-counter state mm:000000008876e677 type:MM_FILEPAGES val:33 [ 26.311957] BUG: Bad rss-counter state mm:000000008876e677 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44263' (ECDSA) to the list of known hosts. 2023/06/20 13:09:56 fuzzer started 2023/06/20 13:09:56 dialing manager at localhost:36067 2023/06/20 13:09:56 checking machine... 2023/06/20 13:09:56 checking revisions... [ 26.958330] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:09:57 testing simple program... [ 27.006373] cgroup: Unknown subsys name 'net' [ 27.047855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:09:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019b68780 RCX=ffffffff836746a8 RDX=1ffff1100336d0fd RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800d7f7970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888019b687d8 R13=ffff88801bcd88c0 R14=ffff88800d7f7a88 R15=ffff888019b68780 RIP=ffffffff814c0438 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 00007fa498846900 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=00007f474a9dd650 CR3=000000000eed6000 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=256f5e3410093ab907495048b4b13f6b XMM02=eff9b2d0a8fce9cb0000000000119cd0 XMM03=2c67c8bc2e329bc30000000000119df8 XMM04=b15df6ecbf1c656800000000000ae988 XMM05=dd3089e73c955b1f00000000001318a8 XMM06=e84dfc836f1dfa2b00000000001302d8 XMM07=fb795ef6d6577056000000000011f3a0 XMM08=2c67c8bc2e329bc30000000000119df8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800e6d3680 RSI=ffffffff83c60923 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888016e5f6a0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800f9bc300 R13=0000000000000000 R14=0000000000000000 R15=ffff888014654000 RIP=ffffffff814c0880 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 00007f474a428900 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=00007f474a9df618 CR3=000000000eefe000 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=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