[ 30.236277] BUG: Bad rss-counter state mm:00000000138b7130 type:MM_FILEPAGES val:33 [ 30.237911] BUG: Bad rss-counter state mm:00000000138b7130 type:MM_ANONPAGES val:22 [ 30.410095] ================================================================== [ 30.410998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.411948] Read of size 8 at addr ffff88800f0e4ed8 by task sshd/219 [ 30.412758] [ 30.412984] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.413925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.414929] Call Trace: [ 30.415300] [ 30.415589] dump_stack_lvl+0x91/0xf0 [ 30.416086] print_report+0xcc/0x620 [ 30.416583] ? __virt_addr_valid+0x102/0x340 [ 30.417130] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.417746] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.418356] kasan_report+0xbe/0xf0 [ 30.418836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.419456] vma_interval_tree_remove+0xc75/0xec0 [ 30.420058] vma_prepare+0xc54/0x11a0 [ 30.420547] __split_vma+0x5af/0x950 [ 30.421016] ? __pfx___split_vma+0x10/0x10 [ 30.421538] ? find_held_lock+0x2c/0x110 [ 30.422061] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.422640] ? lock_is_held_type+0x9f/0x120 [ 30.423197] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.423820] ? mtree_range_walk+0x632/0x900 [ 30.424403] ? mas_walk+0x5c7/0x7c0 [ 30.424900] do_vmi_munmap+0x1f1/0x2b0 [ 30.425389] mmap_region+0x1f9/0x2660 [ 30.425869] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.426395] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.427135] ? __pfx_lock_acquire+0x10/0x10 [ 30.427684] ? __pfx_mmap_region+0x10/0x10 [ 30.428234] ? security_mmap_addr+0x7d/0xa0 [ 30.428798] ? get_unmapped_area+0x1f5/0x3f0 [ 30.429370] do_mmap+0x854/0xf00 [ 30.429823] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.430338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.430919] ksys_mmap_pgoff+0x3af/0x500 [ 30.431447] do_syscall_64+0x3f/0x90 [ 30.431944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.432626] RIP: 0033:0x7fcb8d7fad82 [ 30.433082] 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 [ 30.435239] RSP: 002b:00007fff6ebd7b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.436169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb8d7fad82 [ 30.437067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb8cc34000 [ 30.437947] RBP: 00007fcb8cc34000 R08: 0000000000000009 R09: 0000000000001000 [ 30.438818] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f397535ec0 [ 30.439692] R13: 00007fff6ebd7b80 R14: 00007fff6ebd7bb0 R15: 00007fff6ebd7f10 [ 30.440591] [ 30.440892] [ 30.441113] Allocated by task 212: [ 30.441555] kasan_save_stack+0x22/0x50 [ 30.442072] kasan_set_track+0x25/0x30 [ 30.442587] __kasan_slab_alloc+0x59/0x70 [ 30.443128] kmem_cache_alloc+0x16b/0x370 [ 30.443663] vm_area_dup+0x20/0x160 [ 30.444131] __split_vma+0x170/0x950 [ 30.444628] split_vma+0xc6/0x110 [ 30.445088] mprotect_fixup+0x8d2/0xb30 [ 30.445605] do_mprotect_pkey+0x87e/0xd40 [ 30.446139] __x64_sys_mprotect+0x78/0xc0 [ 30.446675] do_syscall_64+0x3f/0x90 [ 30.447165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.447829] [ 30.448051] Freed by task 212: [ 30.448477] kasan_save_stack+0x22/0x50 [ 30.449005] kasan_set_track+0x25/0x30 [ 30.449508] kasan_save_free_info+0x2b/0x50 [ 30.450055] __kasan_slab_free+0x10a/0x190 [ 30.450602] kmem_cache_free+0x10d/0x4d0 [ 30.451126] rcu_core+0x8c8/0x2860 [ 30.451592] __do_softirq+0x1b7/0x7d4 [ 30.452079] [ 30.452302] Last potentially related work creation: [ 30.452914] kasan_save_stack+0x22/0x50 [ 30.453446] __kasan_record_aux_stack+0x8e/0xa0 [ 30.454016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.454645] remove_vma+0x139/0x170 [ 30.455089] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.455644] do_vmi_munmap+0x1f1/0x2b0 [ 30.456142] __vm_munmap+0x138/0x3a0 [ 30.456611] __x64_sys_munmap+0x59/0x80 [ 30.457123] do_syscall_64+0x3f/0x90 [ 30.457614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.458267] [ 30.458492] The buggy address belongs to the object at ffff88800f0e4e80 [ 30.458492] which belongs to the cache vm_area_struct of size 168 [ 30.460001] The buggy address is located 88 bytes inside of [ 30.460001] freed 168-byte region [ffff88800f0e4e80, ffff88800f0e4f28) [ 30.461479] [ 30.461700] The buggy address belongs to the physical page: [ 30.462389] page:000000000d6267be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0e4 [ 30.463520] memcg:ffff888019cb8e01 [ 30.463955] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.464637] page_type: 0xffffffff() [ 30.465111] raw: 0100000000000200 ffff8880087a0c80 ffffea000035b180 0000000000000006 [ 30.466057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cb8e01 [ 30.467007] page dumped because: kasan: bad access detected [ 30.467694] [ 30.467915] Memory state around the buggy address: [ 30.468546] ffff88800f0e4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.469435] ffff88800f0e4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.470337] >ffff88800f0e4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.471220] ^ [ 30.471980] ffff88800f0e4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.472886] ffff88800f0e4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.473776] ================================================================== [ 30.474783] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.971221] BUG: Bad rss-counter state mm:000000007d0ecdca type:MM_FILEPAGES val:33 [ 32.972167] BUG: Bad rss-counter state mm:000000007d0ecdca type:MM_ANONPAGES val:22 [ 33.424814] BUG: Bad rss-counter state mm:00000000f2f2c6d7 type:MM_FILEPAGES val:33 [ 33.425754] BUG: Bad rss-counter state mm:00000000f2f2c6d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20501' (ECDSA) to the list of known hosts. 2023/06/21 07:31:44 fuzzer started 2023/06/21 07:31:44 dialing manager at localhost:36067 2023/06/21 07:31:44 checking machine... 2023/06/21 07:31:44 checking revisions... [ 34.164117] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:31:44 testing simple program... [ 34.209559] cgroup: Unknown subsys name 'net' [ 34.268687] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:43 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc03 RBX=ffffffff85dfe01c RCX=ffffffff8180c6a1 RDX=0000000000000000 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe01c RSP=ffff888016917920 R8 =ffffffff86138e62 R9 =ffff888016917a18 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe01c R13=ffffffff85dfe000 R14=ffffffff85dfe018 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa185872900 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=00007fa185e27650 CR3=0000000015fcc000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ca5a RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff1100d9e135e RSI=ffffffff8180ca5a RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff86139748 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800eca9080 RIP=ffffffff813ad470 RFL=00000286 [--S--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 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=000055a9c175c040 CR3=000000000da3a000 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=2033343a31333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000