syzkaller login: [ 43.394499] BUG: Bad rss-counter state mm:0000000071d51046 type:MM_FILEPAGES val:33 [ 43.395877] BUG: Bad rss-counter state mm:0000000071d51046 type:MM_ANONPAGES val:22 [ 43.431512] ================================================================== [ 43.432635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.433696] Read of size 8 at addr ffff88800ed2b798 by task sshd/221 [ 43.434561] [ 43.434782] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.435731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.436732] Call Trace: [ 43.437064] [ 43.437346] dump_stack_lvl+0x91/0xf0 [ 43.437842] print_report+0xcc/0x620 [ 43.438328] ? __virt_addr_valid+0x102/0x340 [ 43.438882] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.439500] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.440138] kasan_report+0xbe/0xf0 [ 43.440619] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.441270] vma_interval_tree_remove+0xc75/0xec0 [ 43.441879] vma_prepare+0xc54/0x11a0 [ 43.442361] __split_vma+0x5af/0x950 [ 43.442843] ? __pfx___split_vma+0x10/0x10 [ 43.443372] ? find_held_lock+0x2c/0x110 [ 43.443898] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.444468] ? lock_is_held_type+0x9f/0x120 [ 43.445008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.445635] ? mtree_range_walk+0x632/0x900 [ 43.446197] ? mas_walk+0x5c7/0x7c0 [ 43.446671] do_vmi_munmap+0x1f1/0x2b0 [ 43.447167] mmap_region+0x1f9/0x2660 [ 43.447649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.448168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.448878] ? __pfx_lock_acquire+0x10/0x10 [ 43.449426] ? __pfx_mmap_region+0x10/0x10 [ 43.449960] ? security_mmap_addr+0x7d/0xa0 [ 43.450493] ? get_unmapped_area+0x1f5/0x3f0 [ 43.451047] do_mmap+0x854/0xf00 [ 43.451494] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.451995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.452561] ksys_mmap_pgoff+0x3af/0x500 [ 43.453092] do_syscall_64+0x3f/0x90 [ 43.453576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.454233] RIP: 0033:0x7f5623d0bd82 [ 43.454693] 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 [ 43.456822] RSP: 002b:00007ffc6560e618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.457737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5623d0bd82 [ 43.458578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5623145000 [ 43.459419] RBP: 00007f5623145000 R08: 0000000000000009 R09: 0000000000001000 [ 43.460417] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555be2f9aec0 [ 43.461288] R13: 00007ffc6560e630 R14: 00007ffc6560e660 R15: 00007ffc6560e9c0 [ 43.462145] [ 43.462455] [ 43.462673] Allocated by task 214: [ 43.463096] kasan_save_stack+0x22/0x50 [ 43.463601] kasan_set_track+0x25/0x30 [ 43.464093] __kasan_slab_alloc+0x59/0x70 [ 43.464633] kmem_cache_alloc+0x16b/0x370 [ 43.465162] vm_area_dup+0x20/0x160 [ 43.465625] __split_vma+0x170/0x950 [ 43.466100] split_vma+0xc6/0x110 [ 43.466543] mprotect_fixup+0x8d2/0xb30 [ 43.467049] do_mprotect_pkey+0x87e/0xd40 [ 43.467567] __x64_sys_mprotect+0x78/0xc0 [ 43.468087] do_syscall_64+0x3f/0x90 [ 43.468569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.469217] [ 43.469434] Freed by task 214: [ 43.469826] kasan_save_stack+0x22/0x50 [ 43.470325] kasan_set_track+0x25/0x30 [ 43.470822] kasan_save_free_info+0x2b/0x50 [ 43.471351] __kasan_slab_free+0x10a/0x190 [ 43.471887] kmem_cache_free+0x10d/0x4d0 [ 43.472396] rcu_core+0x8c8/0x2860 [ 43.472844] __do_softirq+0x1b7/0x7d4 [ 43.473341] [ 43.473561] Last potentially related work creation: [ 43.474153] kasan_save_stack+0x22/0x50 [ 43.474664] __kasan_record_aux_stack+0x8e/0xa0 [ 43.475241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.475884] remove_vma+0x139/0x170 [ 43.476337] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.476896] do_vmi_munmap+0x1f1/0x2b0 [ 43.477393] __vm_munmap+0x138/0x3a0 [ 43.477868] __x64_sys_munmap+0x59/0x80 [ 43.478365] do_syscall_64+0x3f/0x90 [ 43.478839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.479477] [ 43.479694] The buggy address belongs to the object at ffff88800ed2b740 [ 43.479694] which belongs to the cache vm_area_struct of size 168 [ 43.481171] The buggy address is located 88 bytes inside of [ 43.481171] freed 168-byte region [ffff88800ed2b740, ffff88800ed2b7e8) [ 43.482612] [ 43.482831] The buggy address belongs to the physical page: [ 43.483484] page:00000000cd2be2de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed2b [ 43.484563] memcg:ffff88801a3ca401 [ 43.484987] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.485651] page_type: 0xffffffff() [ 43.486108] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.487032] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3ca401 [ 43.487934] page dumped because: kasan: bad access detected [ 43.488590] [ 43.488808] Memory state around the buggy address: [ 43.489398] ffff88800ed2b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.490260] ffff88800ed2b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.491111] >ffff88800ed2b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 43.491974] ^ [ 43.492463] ffff88800ed2b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.493341] ffff88800ed2b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.494187] ================================================================== [ 43.495134] Disabling lock debugging due to kernel taint [ 45.562116] BUG: Bad rss-counter state mm:00000000460e3c19 type:MM_FILEPAGES val:33 [ 45.563915] BUG: Bad rss-counter state mm:00000000460e3c19 type:MM_ANONPAGES val:22 [ 46.103968] BUG: Bad rss-counter state mm:0000000042a05858 type:MM_FILEPAGES val:33 [ 46.105119] BUG: Bad rss-counter state mm:0000000042a05858 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56580' (ECDSA) to the list of known hosts. 2023/06/19 18:58:10 fuzzer started 2023/06/19 18:58:10 dialing manager at localhost:44161 2023/06/19 18:58:10 checking machine... 2023/06/19 18:58:10 checking revisions... [ 46.740038] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:58:10 testing simple program... [ 46.786230] cgroup: Unknown subsys name 'net' [ 46.822155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:57:57 Registers: info registers vcpu 0 RAX=ffff88801414d1c0 RBX=ffffffff87b67200 RCX=1ffff1100d9c6c39 RDX=dffffc0000000000 RSI=0000000000000000 RDI=ffffffff81828165 RBP=ffff88806ce361a0 RSP=ffff88806ce09d78 R8 =ffff88806ce361c8 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=00000000000361a0 R14=0000000000000001 R15=ffff888006aa6000 RIP=ffffffff81828217 RFL=00000046 [---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 00007f5d13f93900 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=000055c3dd894768 CR3=00000000098b2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=acea3a0f3bb3cc2e00000000000ae988 XMM05=12abeb8d7476c69d0000000000134f98 XMM06=e4cb8bb95a7664b60000000000134100 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a3b1aa0 RCX=0000000000000000 RDX=ffff888015b21b40 RSI=ffffffff818e9b21 RDI=ffff88801a3b1b48 RBP=0000000000000008 RSP=ffff888016127d58 R8 =0000000000000001 R9 =ffffed1003476369 R10=ffff88801a3b1b4f R11=0000000000000000 R12=0000000000000040 R13=0000000000000008 R14=ffff88801a3b1aa8 R15=ffff88801a3b1ba0 RIP=ffffffff818e9b21 RFL=00000293 [--S-A-C] 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 00007f5f13435900 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=00007f5f139ed0b0 CR3=000000000e4a2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000