syzkaller login: [ 42.310520] BUG: Bad rss-counter state mm:00000000f95fd6c8 type:MM_FILEPAGES val:33 [ 42.311866] BUG: Bad rss-counter state mm:00000000f95fd6c8 type:MM_ANONPAGES val:22 [ 42.472646] ================================================================== [ 42.473952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.475071] Read of size 8 at addr ffff88800e62ed08 by task sshd/220 [ 42.476092] [ 42.476361] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.477447] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.478646] Call Trace: [ 42.479042] [ 42.479387] dump_stack_lvl+0x91/0xf0 [ 42.479986] print_report+0xcc/0x620 [ 42.480582] ? __virt_addr_valid+0x102/0x340 [ 42.481265] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.482032] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.482795] kasan_report+0xbe/0xf0 [ 42.483371] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.484134] vma_interval_tree_remove+0xc75/0xec0 [ 42.484878] vma_prepare+0xc54/0x11a0 [ 42.485494] __split_vma+0x5af/0x950 [ 42.486067] ? __pfx___split_vma+0x10/0x10 [ 42.486728] ? find_held_lock+0x2c/0x110 [ 42.487359] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.488045] ? lock_is_held_type+0x9f/0x120 [ 42.488707] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.489462] ? mtree_range_walk+0x632/0x900 [ 42.490128] ? mas_walk+0x5c7/0x7c0 [ 42.490706] do_vmi_munmap+0x1f1/0x2b0 [ 42.491320] mmap_region+0x1f9/0x2660 [ 42.491915] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.492543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.493435] ? __pfx_lock_acquire+0x10/0x10 [ 42.494091] ? __pfx_mmap_region+0x10/0x10 [ 42.494743] ? security_mmap_addr+0x7d/0xa0 [ 42.495395] ? get_unmapped_area+0x1f5/0x3f0 [ 42.496079] do_mmap+0x854/0xf00 [ 42.496611] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.497218] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.497939] ksys_mmap_pgoff+0x3af/0x500 [ 42.498567] do_syscall_64+0x3f/0x90 [ 42.499156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.499956] RIP: 0033:0x7fd133e44d82 [ 42.500515] 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 [ 42.503153] RSP: 002b:00007ffc50dd1ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.504282] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd133e44d82 [ 42.505327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd13327e000 [ 42.506330] RBP: 00007fd13327e000 R08: 0000000000000009 R09: 0000000000001000 [ 42.507189] R10: 0000000000000812 R11: 0000000000000206 R12: 000056460ad0fec0 [ 42.508035] R13: 00007ffc50dd1d00 R14: 00007ffc50dd1d30 R15: 00007ffc50dd2090 [ 42.508902] [ 42.509198] [ 42.509419] Allocated by task 213: [ 42.509855] kasan_save_stack+0x22/0x50 [ 42.510364] kasan_set_track+0x25/0x30 [ 42.510858] __kasan_slab_alloc+0x59/0x70 [ 42.511388] kmem_cache_alloc+0x16b/0x370 [ 42.511913] vm_area_dup+0x20/0x160 [ 42.512367] __split_vma+0x170/0x950 [ 42.512834] split_vma+0xc6/0x110 [ 42.513282] mprotect_fixup+0x8d2/0xb30 [ 42.513805] do_mprotect_pkey+0x87e/0xd40 [ 42.514321] __x64_sys_mprotect+0x78/0xc0 [ 42.514843] do_syscall_64+0x3f/0x90 [ 42.515321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.515966] [ 42.516185] Freed by task 213: [ 42.516584] kasan_save_stack+0x22/0x50 [ 42.517082] kasan_set_track+0x25/0x30 [ 42.517595] kasan_save_free_info+0x2b/0x50 [ 42.518122] __kasan_slab_free+0x10a/0x190 [ 42.518664] kmem_cache_free+0x10d/0x4d0 [ 42.519177] rcu_core+0x8c8/0x2860 [ 42.519626] __do_softirq+0x1b7/0x7d4 [ 42.520099] [ 42.520310] Last potentially related work creation: [ 42.520902] kasan_save_stack+0x22/0x50 [ 42.521416] __kasan_record_aux_stack+0x8e/0xa0 [ 42.521995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.522643] remove_vma+0x139/0x170 [ 42.523092] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.523653] do_vmi_munmap+0x1f1/0x2b0 [ 42.524134] __vm_munmap+0x138/0x3a0 [ 42.524613] __x64_sys_munmap+0x59/0x80 [ 42.525114] do_syscall_64+0x3f/0x90 [ 42.525603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.526256] [ 42.526474] The buggy address belongs to the object at ffff88800e62ecb0 [ 42.526474] which belongs to the cache vm_area_struct of size 168 [ 42.527955] The buggy address is located 88 bytes inside of [ 42.527955] freed 168-byte region [ffff88800e62ecb0, ffff88800e62ed58) [ 42.529379] [ 42.529606] The buggy address belongs to the physical page: [ 42.530275] page:000000002d47037b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe62e [ 42.531365] memcg:ffff888015e79501 [ 42.531789] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.532435] page_type: 0xffffffff() [ 42.532880] raw: 0100000000000200 ffff88800879fc80 ffffea00003c5740 dead000000000004 [ 42.533816] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e79501 [ 42.534736] page dumped because: kasan: bad access detected [ 42.535370] [ 42.535573] Memory state around the buggy address: [ 42.536114] ffff88800e62ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.536916] ffff88800e62ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.537724] >ffff88800e62ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.538519] ^ [ 42.538933] ffff88800e62ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.539732] ffff88800e62ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.540531] ================================================================== [ 42.541482] Disabling lock debugging due to kernel taint [ 44.719363] BUG: Bad rss-counter state mm:0000000035f9a3f2 type:MM_FILEPAGES val:33 [ 44.720532] BUG: Bad rss-counter state mm:0000000035f9a3f2 type:MM_ANONPAGES val:22 [ 45.207110] BUG: Bad rss-counter state mm:00000000f8efb17b type:MM_FILEPAGES val:33 [ 45.208115] BUG: Bad rss-counter state mm:00000000f8efb17b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1284' (ECDSA) to the list of known hosts. 2023/06/20 10:38:17 fuzzer started 2023/06/20 10:38:17 dialing manager at localhost:44161 2023/06/20 10:38:17 checking machine... 2023/06/20 10:38:17 checking revisions... [ 45.933326] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:38:17 testing simple program... [ 45.988028] cgroup: Unknown subsys name 'net' [ 46.029199] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:38:05 Registers: info registers vcpu 0 RAX=ffff88800d5e0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d5dfc01 RSI=ffff88800d5dfcb0 RDI=ffff88800d5df8e8 RBP=ffff88800d5dfcb0 RSP=ffff88800d5df840 R8 =ffffffff86136d80 R9 =ffff88800d5df918 R10=0000000000038001 R11=0000000000020c48 R12=0000000000000008 R13=ffff88800d5d8000 R14=ffff88800d5dfcb8 R15=ffff88800d5df8d8 RIP=ffffffff811304ce 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f51caadc900 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=00007f51c9f71740 CR3=000000000e80e000 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=0530fb12de0b545a00000000000ae988 XMM05=24504f37f22bbabb0000000000134b48 XMM06=19e9129bd510f23500000000001339e0 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=0000000000000000 RCX=0000000000000000 RDX=ffff888017ddb680 RSI=ffffffff83ab4207 RDI=ffffffff87f9468c RBP=0000000000000000 RSP=ffff888015f7f508 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=00000df700000df7 R12=0000000000000000 R13=00000000000000bd R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff83ab420c 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 00007f7f65843900 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=00007ffe48be5000 CR3=000000000dbfa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000