syzkaller login: [ 36.859191] BUG: Bad rss-counter state mm:00000000b563850e type:MM_FILEPAGES val:33 [ 36.860798] BUG: Bad rss-counter state mm:00000000b563850e type:MM_ANONPAGES val:22 [ 37.045835] ================================================================== [ 37.046924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.048149] Read of size 8 at addr ffff8880165b7058 by task sshd/221 [ 37.049049] [ 37.049265] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.050141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.051167] Call Trace: [ 37.051492] [ 37.051786] dump_stack_lvl+0x91/0xf0 [ 37.052275] print_report+0xcc/0x620 [ 37.052772] ? __virt_addr_valid+0x102/0x340 [ 37.053331] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.053954] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.054575] kasan_report+0xbe/0xf0 [ 37.055048] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.055675] vma_interval_tree_remove+0xc75/0xec0 [ 37.056276] vma_prepare+0xc54/0x11a0 [ 37.056761] __split_vma+0x5af/0x950 [ 37.057242] ? __pfx___split_vma+0x10/0x10 [ 37.057772] ? find_held_lock+0x2c/0x110 [ 37.058294] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.058870] ? lock_is_held_type+0x9f/0x120 [ 37.059407] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.060001] ? mtree_range_walk+0x632/0x900 [ 37.060570] ? mas_walk+0x5c7/0x7c0 [ 37.061047] do_vmi_munmap+0x1f1/0x2b0 [ 37.061544] mmap_region+0x1f9/0x2660 [ 37.062029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.062553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.063280] ? __pfx_lock_acquire+0x10/0x10 [ 37.063820] ? __pfx_mmap_region+0x10/0x10 [ 37.064359] ? security_mmap_addr+0x7d/0xa0 [ 37.064892] ? get_unmapped_area+0x1f5/0x3f0 [ 37.065459] do_mmap+0x854/0xf00 [ 37.065903] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.066409] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.066970] ksys_mmap_pgoff+0x3af/0x500 [ 37.067470] do_syscall_64+0x3f/0x90 [ 37.067951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.068614] RIP: 0033:0x7f02ef30cd82 [ 37.069066] 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 [ 37.071162] RSP: 002b:00007ffcab32cac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.072062] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02ef30cd82 [ 37.072908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02ee746000 [ 37.073748] RBP: 00007f02ee746000 R08: 0000000000000009 R09: 0000000000001000 [ 37.074578] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580010e9ec0 [ 37.075428] R13: 00007ffcab32cae0 R14: 00007ffcab32cb10 R15: 00007ffcab32ce70 [ 37.076281] [ 37.076597] [ 37.076812] Allocated by task 214: [ 37.077240] kasan_save_stack+0x22/0x50 [ 37.077744] kasan_set_track+0x25/0x30 [ 37.078238] __kasan_slab_alloc+0x59/0x70 [ 37.078765] kmem_cache_alloc+0x16b/0x370 [ 37.079284] vm_area_dup+0x20/0x160 [ 37.079737] __split_vma+0x170/0x950 [ 37.080204] split_vma+0xc6/0x110 [ 37.080649] mprotect_fixup+0x8d2/0xb30 [ 37.081159] do_mprotect_pkey+0x87e/0xd40 [ 37.081679] __x64_sys_mprotect+0x78/0xc0 [ 37.082213] do_syscall_64+0x3f/0x90 [ 37.082684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.083329] [ 37.083544] Freed by task 214: [ 37.083942] kasan_save_stack+0x22/0x50 [ 37.084463] kasan_set_track+0x25/0x30 [ 37.084965] kasan_save_free_info+0x2b/0x50 [ 37.085497] __kasan_slab_free+0x10a/0x190 [ 37.086029] kmem_cache_free+0x10d/0x4d0 [ 37.086544] rcu_core+0x8c8/0x2860 [ 37.086990] __do_softirq+0x1b7/0x7d4 [ 37.087465] [ 37.087678] Last potentially related work creation: [ 37.088253] kasan_save_stack+0x22/0x50 [ 37.088759] __kasan_record_aux_stack+0x8e/0xa0 [ 37.089326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.090054] remove_vma+0x139/0x170 [ 37.090501] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.091061] do_vmi_munmap+0x1f1/0x2b0 [ 37.091558] __vm_munmap+0x138/0x3a0 [ 37.092026] __x64_sys_munmap+0x59/0x80 [ 37.092535] do_syscall_64+0x3f/0x90 [ 37.093019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.093663] [ 37.093880] The buggy address belongs to the object at ffff8880165b7000 [ 37.093880] which belongs to the cache vm_area_struct of size 168 [ 37.095375] The buggy address is located 88 bytes inside of [ 37.095375] freed 168-byte region [ffff8880165b7000, ffff8880165b70a8) [ 37.096794] [ 37.097013] The buggy address belongs to the physical page: [ 37.097677] page:00000000c6687ef5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165b7 [ 37.098764] memcg:ffff8880165b5101 [ 37.099184] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.099823] page_type: 0xffffffff() [ 37.100275] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.101191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165b5101 [ 37.102088] page dumped because: kasan: bad access detected [ 37.102741] [ 37.102961] Memory state around the buggy address: [ 37.103540] ffff8880165b6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 37.104408] ffff8880165b6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.105255] >ffff8880165b7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.106097] ^ [ 37.106827] ffff8880165b7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 37.107672] ffff8880165b7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.108527] ================================================================== [ 37.109473] Disabling lock debugging due to kernel taint [ 39.116363] BUG: Bad rss-counter state mm:000000005548adb9 type:MM_FILEPAGES val:33 [ 39.117341] BUG: Bad rss-counter state mm:000000005548adb9 type:MM_ANONPAGES val:22 [ 39.583522] BUG: Bad rss-counter state mm:00000000933bec6c type:MM_FILEPAGES val:33 [ 39.584771] BUG: Bad rss-counter state mm:00000000933bec6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14387' (ECDSA) to the list of known hosts. 2023/06/19 17:15:19 fuzzer started 2023/06/19 17:15:19 dialing manager at localhost:44161 2023/06/19 17:15:19 checking machine... 2023/06/19 17:15:19 checking revisions... [ 40.244897] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:15:20 testing simple program... [ 40.299200] cgroup: Unknown subsys name 'net' [ 40.362609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:15:13 Registers: info registers vcpu 0 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f0 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1e8 RSP=ffff888009a47220 R8 =ffffffff860d68c0 R9 =ffff888009a47318 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1e4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f35d6c7a900 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=00007f35d7231618 CR3=000000001a2f8000 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=00007fa5742b68d0 CR3=000000000d6fa000 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=b7fa372fbd5bbcb3ad4d6ca307ef5231 XMM02=2c67c8bc2e329bc3000000000011d110 XMM03=fb795ef6d65770560000000000124280 XMM04=75cb7af63282173300000000000ae988 XMM05=dfc720021a7421f10000000000134318 XMM06=c291bd5c70af25b90000000000133d10 XMM07=e042d86d42eb936e0000000000124500 XMM08=9a92b36e8d0c4a42000000000011d170 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000