syzkaller login: [ 33.863146] BUG: Bad rss-counter state mm:00000000434366af type:MM_FILEPAGES val:33 [ 33.864407] BUG: Bad rss-counter state mm:00000000434366af type:MM_ANONPAGES val:22 [ 33.899063] ================================================================== [ 33.899742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.900453] Read of size 8 at addr ffff88800d70fc20 by task sshd/220 [ 33.901031] [ 33.901193] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.901842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.902570] Call Trace: [ 33.902886] [ 33.903095] dump_stack_lvl+0x91/0xf0 [ 33.903455] print_report+0xcc/0x620 [ 33.903821] ? __virt_addr_valid+0x102/0x340 [ 33.904233] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.904693] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.905145] kasan_report+0xbe/0xf0 [ 33.905497] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.905956] vma_interval_tree_remove+0xc75/0xec0 [ 33.906401] vma_prepare+0xc54/0x11a0 [ 33.906760] __split_vma+0x5af/0x950 [ 33.907103] ? __pfx___split_vma+0x10/0x10 [ 33.907495] ? find_held_lock+0x2c/0x110 [ 33.907882] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.908316] ? lock_is_held_type+0x9f/0x120 [ 33.908718] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.909167] ? mtree_range_walk+0x632/0x900 [ 33.909580] ? mas_walk+0x5c7/0x7c0 [ 33.909930] do_vmi_munmap+0x1f1/0x2b0 [ 33.910290] mmap_region+0x1f9/0x2660 [ 33.910649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.911029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.911581] ? __pfx_lock_acquire+0x10/0x10 [ 33.911974] ? __pfx_mmap_region+0x10/0x10 [ 33.912336] ? security_mmap_addr+0x7d/0xa0 [ 33.912701] ? get_unmapped_area+0x1f5/0x3f0 [ 33.913071] do_mmap+0x854/0xf00 [ 33.913368] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.913703] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.914079] ksys_mmap_pgoff+0x3af/0x500 [ 33.914419] do_syscall_64+0x3f/0x90 [ 33.914739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.915178] RIP: 0033:0x7fa6a3d42d82 [ 33.915481] 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 [ 33.916916] RSP: 002b:00007ffe46277c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.917519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6a3d42d82 [ 33.918080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6a317c000 [ 33.918646] RBP: 00007fa6a317c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.919205] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b61b0df70 [ 33.919774] R13: 00007ffe46277c90 R14: 00007ffe46277cc0 R15: 00007ffe46278020 [ 33.920352] [ 33.920551] [ 33.920698] Allocated by task 213: [ 33.920984] kasan_save_stack+0x22/0x50 [ 33.921323] kasan_set_track+0x25/0x30 [ 33.921657] __kasan_slab_alloc+0x59/0x70 [ 33.922009] kmem_cache_alloc+0x16b/0x370 [ 33.922354] vm_area_dup+0x20/0x160 [ 33.922660] __split_vma+0x170/0x950 [ 33.922971] split_vma+0xc6/0x110 [ 33.923266] mprotect_fixup+0x8d2/0xb30 [ 33.923605] do_mprotect_pkey+0x87e/0xd40 [ 33.923967] __x64_sys_mprotect+0x78/0xc0 [ 33.924319] do_syscall_64+0x3f/0x90 [ 33.924638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.925065] [ 33.925210] Freed by task 213: [ 33.925472] kasan_save_stack+0x22/0x50 [ 33.925813] kasan_set_track+0x25/0x30 [ 33.926141] kasan_save_free_info+0x2b/0x50 [ 33.926495] __kasan_slab_free+0x10a/0x190 [ 33.926852] kmem_cache_free+0x10d/0x4d0 [ 33.927193] rcu_core+0x8c8/0x2860 [ 33.927488] __do_softirq+0x1b7/0x7d4 [ 33.927811] [ 33.927961] Last potentially related work creation: [ 33.928352] kasan_save_stack+0x22/0x50 [ 33.928694] __kasan_record_aux_stack+0x8e/0xa0 [ 33.929084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.929513] remove_vma+0x139/0x170 [ 33.929819] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.930190] do_vmi_munmap+0x1f1/0x2b0 [ 33.930517] __vm_munmap+0x138/0x3a0 [ 33.930829] __x64_sys_munmap+0x59/0x80 [ 33.931163] do_syscall_64+0x3f/0x90 [ 33.931479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.931911] [ 33.932062] The buggy address belongs to the object at ffff88800d70fbc8 [ 33.932062] which belongs to the cache vm_area_struct of size 168 [ 33.933038] The buggy address is located 88 bytes inside of [ 33.933038] freed 168-byte region [ffff88800d70fbc8, ffff88800d70fc70) [ 33.933970] [ 33.934118] The buggy address belongs to the physical page: [ 33.934562] page:00000000d20538f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd70f [ 33.935281] memcg:ffff888016754801 [ 33.935569] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.936023] page_type: 0xffffffff() [ 33.936324] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.936940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016754801 [ 33.937541] page dumped because: kasan: bad access detected [ 33.937983] [ 33.938129] Memory state around the buggy address: [ 33.938518] ffff88800d70fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.939090] ffff88800d70fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.939664] >ffff88800d70fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.940239] ^ [ 33.940594] ffff88800d70fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.941165] ffff88800d70fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.941731] ================================================================== [ 33.942375] Disabling lock debugging due to kernel taint [ 36.458159] BUG: Bad rss-counter state mm:000000000d0af79e type:MM_FILEPAGES val:33 [ 36.459775] BUG: Bad rss-counter state mm:000000000d0af79e type:MM_ANONPAGES val:22 [ 36.925583] BUG: Bad rss-counter state mm:00000000ca837878 type:MM_FILEPAGES val:33 [ 36.927265] BUG: Bad rss-counter state mm:00000000ca837878 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9386' (ECDSA) to the list of known hosts. 2023/06/19 16:20:26 fuzzer started 2023/06/19 16:20:27 dialing manager at localhost:44161 2023/06/19 16:20:27 checking machine... 2023/06/19 16:20:27 checking revisions... [ 37.663445] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:20:27 testing simple program... [ 37.707185] cgroup: Unknown subsys name 'net' [ 37.745121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:20:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002cae3e7 RSI=ffffffff83ab4224 RDI=ffff888016571f38 RBP=ffff888016571b40 RSP=ffff888019e7f4d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a1b00000a1b R12=ffff888016571b40 R13=000000000000007c R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff81374512 RFL=00000216 [----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 00007f73ad852900 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=00007f73ade09618 CR3=000000001806a000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fcc37332e70 CR3=000000000c7c4000 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=eaa8aeb63995b38b7a4c338a80fdadca XMM02=ec2efd57dc4c00df000000000011d0f8 XMM03=c58c0ae5c3e77313000000000011d1c8 XMM04=b7389bbc3194f74400000000000ae988 XMM05=19e9129bd510f23500000000001344f8 XMM06=8ea87e97a01b28ae0000000000133360 XMM07=e042d86d42eb936e0000000000124c90 XMM08=c58c0ae5c3e77313000000000011d1c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000