[ 30.354029] BUG: Bad rss-counter state mm:00000000d1cc4e55 type:MM_FILEPAGES val:33 [ 30.354857] BUG: Bad rss-counter state mm:00000000d1cc4e55 type:MM_ANONPAGES val:22 [ 30.478169] ================================================================== [ 30.478807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.479445] Read of size 8 at addr ffff888015b0ba50 by task sshd/218 [ 30.479975] [ 30.480128] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.480718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.481408] Call Trace: [ 30.481631] [ 30.481821] dump_stack_lvl+0x91/0xf0 [ 30.482157] print_report+0xcc/0x620 [ 30.482492] ? __virt_addr_valid+0x102/0x340 [ 30.483016] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.483442] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.483863] kasan_report+0xbe/0xf0 [ 30.484187] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.484606] vma_interval_tree_remove+0xc75/0xec0 [ 30.485030] vma_prepare+0xc54/0x11a0 [ 30.485372] __split_vma+0x5af/0x950 [ 30.485688] ? __pfx___split_vma+0x10/0x10 [ 30.486043] ? find_held_lock+0x2c/0x110 [ 30.486411] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.486794] ? lock_is_held_type+0x9f/0x120 [ 30.487165] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.487579] ? mtree_range_walk+0x632/0x900 [ 30.487940] ? mas_walk+0x5c7/0x7c0 [ 30.488270] do_vmi_munmap+0x1f1/0x2b0 [ 30.488606] mmap_region+0x1f9/0x2660 [ 30.488925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.489313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.489802] ? __pfx_lock_acquire+0x10/0x10 [ 30.490168] ? __pfx_mmap_region+0x10/0x10 [ 30.490534] ? security_mmap_addr+0x7d/0xa0 [ 30.490901] ? get_unmapped_area+0x1f5/0x3f0 [ 30.491282] do_mmap+0x854/0xf00 [ 30.491588] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.491921] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.492318] ksys_mmap_pgoff+0x3af/0x500 [ 30.492649] do_syscall_64+0x3f/0x90 [ 30.492973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.493445] RIP: 0033:0x7ff4aedabd82 [ 30.493759] 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 [ 30.495202] RSP: 002b:00007ffc189bf978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.495827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4aedabd82 [ 30.496414] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4ae1e5000 [ 30.496998] RBP: 00007ff4ae1e5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.497588] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572cfed7ec0 [ 30.498174] R13: 00007ffc189bf990 R14: 00007ffc189bf9c0 R15: 00007ffc189bfd20 [ 30.498783] [ 30.498980] [ 30.499125] Allocated by task 211: [ 30.499421] kasan_save_stack+0x22/0x50 [ 30.499768] kasan_set_track+0x25/0x30 [ 30.500116] __kasan_slab_alloc+0x59/0x70 [ 30.500480] kmem_cache_alloc+0x16b/0x370 [ 30.500831] vm_area_dup+0x20/0x160 [ 30.501147] __split_vma+0x170/0x950 [ 30.501489] split_vma+0xc6/0x110 [ 30.501794] mprotect_fixup+0x8d2/0xb30 [ 30.502139] do_mprotect_pkey+0x87e/0xd40 [ 30.502513] __x64_sys_mprotect+0x78/0xc0 [ 30.502873] do_syscall_64+0x3f/0x90 [ 30.503210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503648] [ 30.503799] Freed by task 13: [ 30.504058] kasan_save_stack+0x22/0x50 [ 30.504411] kasan_set_track+0x25/0x30 [ 30.504748] kasan_save_free_info+0x2b/0x50 [ 30.505117] __kasan_slab_free+0x10a/0x190 [ 30.505494] kmem_cache_free+0x10d/0x4d0 [ 30.505833] rcu_core+0x8c8/0x2860 [ 30.506128] __do_softirq+0x1b7/0x7d4 [ 30.506474] [ 30.506624] Last potentially related work creation: [ 30.507025] kasan_save_stack+0x22/0x50 [ 30.507378] __kasan_record_aux_stack+0x8e/0xa0 [ 30.507765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.508216] remove_vma+0x139/0x170 [ 30.508520] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.508898] do_vmi_munmap+0x1f1/0x2b0 [ 30.509261] __vm_munmap+0x138/0x3a0 [ 30.509580] __x64_sys_munmap+0x59/0x80 [ 30.509918] do_syscall_64+0x3f/0x90 [ 30.510225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.510664] [ 30.510806] The buggy address belongs to the object at ffff888015b0b9f8 [ 30.510806] which belongs to the cache vm_area_struct of size 168 [ 30.511808] The buggy address is located 88 bytes inside of [ 30.511808] freed 168-byte region [ffff888015b0b9f8, ffff888015b0baa0) [ 30.512780] [ 30.512932] The buggy address belongs to the physical page: [ 30.513392] page:00000000f825ac0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b0b [ 30.514147] memcg:ffff8880099d8a01 [ 30.514433] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.514875] page_type: 0xffffffff() [ 30.515193] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.515825] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099d8a01 [ 30.516444] page dumped because: kasan: bad access detected [ 30.516891] [ 30.517029] Memory state around the buggy address: [ 30.517429] ffff888015b0b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.518017] ffff888015b0b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.518623] >ffff888015b0ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.519218] ^ [ 30.519708] ffff888015b0ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.520312] ffff888015b0bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.520888] ================================================================== [ 30.522018] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.408132] BUG: Bad rss-counter state mm:000000008222c717 type:MM_FILEPAGES val:33 [ 32.408869] BUG: Bad rss-counter state mm:000000008222c717 type:MM_ANONPAGES val:22 [ 32.708561] BUG: Bad rss-counter state mm:00000000392131ff type:MM_FILEPAGES val:33 [ 32.709271] BUG: Bad rss-counter state mm:00000000392131ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49626' (ECDSA) to the list of known hosts. 2023/06/21 09:35:28 fuzzer started 2023/06/21 09:35:28 dialing manager at localhost:36067 2023/06/21 09:35:28 checking machine... 2023/06/21 09:35:28 checking revisions... [ 33.280618] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:35:28 testing simple program... [ 33.313595] cgroup: Unknown subsys name 'net' [ 33.355703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:35:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001b28f10 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000016fb RDI=ffff888010344000 RBP=ffff88801625e5c0 RSP=ffff88800d947848 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88801b80e948 R11=00000000000b6d53 R12=ffff88801b80e948 R13=ffff88800d0d2000 R14=0000000000000001 R15=ffff88800d0d4000 RIP=ffffffff8451fb74 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd3f704a900 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=00007fd3f6444970 CR3=000000000c8da000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3edd70cfe5a6c10a00000000000ae988 XMM05=c39ab7bb3c44115e0000000000133148 XMM06=751b9502027dc0b90000000000131c70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000013 RBX=00007ffcfcea53c0 RCX=00007ff0e9cb4f30 RDX=00007ff0e94e0418 RSI=00007ffcfcea52a0 RDI=0000000000000005 RBP=00007ffcfcea54f0 RSP=00007ffcfcea52a0 R8 =0000000000000000 R9 =00007ffcfcea53f0 R10=0000000000000024 R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000024 R15=0000000000000000 RIP=00007ff0e9cceaff RFL=00000217 [----APC] 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 00007ff0e9143900 00000000 00000000 GS =0000 0000000000000000 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=00007ff0e90f2008 CR3=000000000cb48000 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=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