syzkaller login: [ 36.381553] BUG: Bad rss-counter state mm:00000000d29a4bc9 type:MM_FILEPAGES val:33 [ 36.382889] BUG: Bad rss-counter state mm:00000000d29a4bc9 type:MM_ANONPAGES val:22 [ 36.494856] ================================================================== [ 36.495942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.496664] Read of size 8 at addr ffff888010297c20 by task sshd/221 [ 36.497254] [ 36.497424] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.498194] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.498947] Call Trace: [ 36.499192] [ 36.499412] dump_stack_lvl+0x91/0xf0 [ 36.499795] print_report+0xcc/0x620 [ 36.500176] ? __virt_addr_valid+0x102/0x340 [ 36.500601] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.501077] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.501554] kasan_report+0xbe/0xf0 [ 36.501916] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.502394] vma_interval_tree_remove+0xc75/0xec0 [ 36.502860] vma_prepare+0xc54/0x11a0 [ 36.503233] __split_vma+0x5af/0x950 [ 36.503597] ? __pfx___split_vma+0x10/0x10 [ 36.504012] ? find_held_lock+0x2c/0x110 [ 36.504413] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.504843] ? lock_is_held_type+0x9f/0x120 [ 36.505256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.505717] ? mtree_range_walk+0x632/0x900 [ 36.506136] ? mas_walk+0x5c7/0x7c0 [ 36.506503] do_vmi_munmap+0x1f1/0x2b0 [ 36.506880] mmap_region+0x1f9/0x2660 [ 36.507252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.507645] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.508214] ? __pfx_lock_acquire+0x10/0x10 [ 36.508628] ? __pfx_mmap_region+0x10/0x10 [ 36.509036] ? security_mmap_addr+0x7d/0xa0 [ 36.509442] ? get_unmapped_area+0x1f5/0x3f0 [ 36.509863] do_mmap+0x854/0xf00 [ 36.510203] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.510582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.511017] ksys_mmap_pgoff+0x3af/0x500 [ 36.511402] do_syscall_64+0x3f/0x90 [ 36.511774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.512272] RIP: 0033:0x7fd948f43d82 [ 36.512619] 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 [ 36.514266] RSP: 002b:00007ffdb4c85dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.514964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd948f43d82 [ 36.515614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd94837d000 [ 36.516271] RBP: 00007fd94837d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.516923] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8f6ac9b20 [ 36.517585] R13: 00007ffdb4c85de0 R14: 00007ffdb4c85e10 R15: 00007ffdb4c86170 [ 36.518253] [ 36.518479] [ 36.518643] Allocated by task 214: [ 36.518974] kasan_save_stack+0x22/0x50 [ 36.519363] kasan_set_track+0x25/0x30 [ 36.519759] __kasan_slab_alloc+0x59/0x70 [ 36.520167] kmem_cache_alloc+0x16b/0x370 [ 36.520565] vm_area_dup+0x20/0x160 [ 36.520913] __split_vma+0x170/0x950 [ 36.521270] split_vma+0xc6/0x110 [ 36.521609] mprotect_fixup+0x8d2/0xb30 [ 36.521995] do_mprotect_pkey+0x87e/0xd40 [ 36.522398] __x64_sys_mprotect+0x78/0xc0 [ 36.522795] do_syscall_64+0x3f/0x90 [ 36.523165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.523657] [ 36.523832] Freed by task 203: [ 36.524136] kasan_save_stack+0x22/0x50 [ 36.524527] kasan_set_track+0x25/0x30 [ 36.524907] kasan_save_free_info+0x2b/0x50 [ 36.525317] __kasan_slab_free+0x10a/0x190 [ 36.525726] kmem_cache_free+0x10d/0x4d0 [ 36.526118] rcu_core+0x8c8/0x2860 [ 36.526461] __do_softirq+0x1b7/0x7d4 [ 36.526834] [ 36.526999] Last potentially related work creation: [ 36.527449] kasan_save_stack+0x22/0x50 [ 36.527845] __kasan_record_aux_stack+0x8e/0xa0 [ 36.528285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.528780] remove_vma+0x139/0x170 [ 36.529127] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.529553] do_vmi_munmap+0x1f1/0x2b0 [ 36.529928] __vm_munmap+0x138/0x3a0 [ 36.530286] __x64_sys_munmap+0x59/0x80 [ 36.530666] do_syscall_64+0x3f/0x90 [ 36.531025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.531519] [ 36.531691] The buggy address belongs to the object at ffff888010297bc8 [ 36.531691] which belongs to the cache vm_area_struct of size 168 [ 36.532822] The buggy address is located 88 bytes inside of [ 36.532822] freed 168-byte region [ffff888010297bc8, ffff888010297c70) [ 36.533899] [ 36.534065] The buggy address belongs to the physical page: [ 36.534571] page:000000003a744a1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10297 [ 36.535413] memcg:ffff888015982f01 [ 36.535747] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.536243] page_type: 0xffffffff() [ 36.536588] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.537294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015982f01 [ 36.537994] page dumped because: kasan: bad access detected [ 36.538499] [ 36.538667] Memory state around the buggy address: [ 36.539161] ffff888010297b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.539832] ffff888010297b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.540488] >ffff888010297c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.541139] ^ [ 36.541544] ffff888010297c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.542200] ffff888010297d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.542859] ================================================================== [ 36.543553] Disabling lock debugging due to kernel taint [ 38.161060] BUG: Bad rss-counter state mm:00000000bab4d0ad type:MM_FILEPAGES val:33 [ 38.162069] BUG: Bad rss-counter state mm:00000000bab4d0ad type:MM_ANONPAGES val:22 [ 38.693155] BUG: Bad rss-counter state mm:00000000d2b8bba2 type:MM_FILEPAGES val:33 [ 38.694283] BUG: Bad rss-counter state mm:00000000d2b8bba2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5464' (ECDSA) to the list of known hosts. 2023/06/19 16:52:49 fuzzer started 2023/06/19 16:52:50 dialing manager at localhost:44161 2023/06/19 16:52:50 checking machine... 2023/06/19 16:52:50 checking revisions... [ 39.344545] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:52:50 testing simple program... [ 39.396986] cgroup: Unknown subsys name 'net' [ 39.465575] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:52:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d0c26 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880147479f8 RSP=ffff888014747930 R8 =ffffffff860d0c2a R9 =ffff8880147479e0 R10=0000000000038001 R11=000000000000fc0f R12=ffff888014747a00 R13=ffff8880147479e8 R14=0000000000000005 R15=ffff8880147479a0 RIP=ffffffff81130b1f RFL=00000297 [--S-APC] 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 00007f75de7b2900 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=00007fcbccd76650 CR3=000000000efce000 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=6e886c0feb3bd4bec64f7bcb273cd151 XMM02=ec2efd57dc4c00df000000000011e3a0 XMM03=8dc595e69a5109ec000000000011e470 XMM04=5bcb75fddc1769ec00000000000ae988 XMM05=6294704d12a043950000000000135dd8 XMM06=c291bd5c70af25b90000000000134bc8 XMM07=fb795ef6d657705600000000001251f0 XMM08=2c67c8bc2e329bc3000000000011e410 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffff888015d88c40 RCX=ffffffff818c6a25 RDX=ffff888015b351c0 RSI=0000000000000000 RDI=0000000000000003 RBP=000000000000c000 RSP=ffff88801c91fd08 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000008 R14=ffffffff84d2fa00 R15=ffff888008f92000 RIP=ffffffff814c07eb 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 00007fcbcc7c1900 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=00007fcbccd790b0 CR3=000000001aa30000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000