[ 69.602937] BUG: Bad rss-counter state mm:000000006f40abff type:MM_FILEPAGES val:33 [ 69.604356] BUG: Bad rss-counter state mm:000000006f40abff type:MM_ANONPAGES val:22 [ 69.709725] ================================================================== [ 69.710432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.711145] Read of size 8 at addr ffff88801a0ced08 by task sshd/219 [ 69.711737] [ 69.711906] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.712836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.713610] Call Trace: [ 69.713857] [ 69.714080] dump_stack_lvl+0x91/0xf0 [ 69.714471] print_report+0xcc/0x620 [ 69.714850] ? __virt_addr_valid+0x102/0x340 [ 69.715266] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.715737] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.716217] kasan_report+0xbe/0xf0 [ 69.716597] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.717076] vma_interval_tree_remove+0xc75/0xec0 [ 69.717541] vma_prepare+0xc54/0x11a0 [ 69.717914] __split_vma+0x5af/0x950 [ 69.718279] ? __pfx___split_vma+0x10/0x10 [ 69.718684] ? find_held_lock+0x2c/0x110 [ 69.719083] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.719514] ? lock_is_held_type+0x9f/0x120 [ 69.719926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.720408] ? mtree_range_walk+0x632/0x900 [ 69.720822] ? mas_walk+0x5c7/0x7c0 [ 69.721102] do_vmi_munmap+0x1f1/0x2b0 [ 69.721397] mmap_region+0x1f9/0x2660 [ 69.721676] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.721990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.722430] ? __pfx_lock_acquire+0x10/0x10 [ 69.722761] ? __pfx_mmap_region+0x10/0x10 [ 69.723086] ? security_mmap_addr+0x7d/0xa0 [ 69.723412] ? get_unmapped_area+0x1f5/0x3f0 [ 69.723754] do_mmap+0x854/0xf00 [ 69.724022] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.724336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.724683] ksys_mmap_pgoff+0x3af/0x500 [ 69.724999] do_syscall_64+0x3f/0x90 [ 69.725302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.725701] RIP: 0033:0x7f8295e34d82 [ 69.725986] 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 [ 69.727302] RSP: 002b:00007ffc111c7278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.727855] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8295e34d82 [ 69.728392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f829526e000 [ 69.728920] RBP: 00007f829526e000 R08: 0000000000000009 R09: 0000000000001000 [ 69.729445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b57d8bdd90 [ 69.729970] R13: 00007ffc111c7290 R14: 00007ffc111c72c0 R15: 00007ffc111c7620 [ 69.730501] [ 69.730679] [ 69.730813] Allocated by task 212: [ 69.731082] kasan_save_stack+0x22/0x50 [ 69.731390] kasan_set_track+0x25/0x30 [ 69.731694] __kasan_slab_alloc+0x59/0x70 [ 69.732020] kmem_cache_alloc+0x16b/0x370 [ 69.732345] vm_area_dup+0x20/0x160 [ 69.732627] __split_vma+0x170/0x950 [ 69.732913] split_vma+0xc6/0x110 [ 69.733186] mprotect_fixup+0x8d2/0xb30 [ 69.733495] do_mprotect_pkey+0x87e/0xd40 [ 69.733818] __x64_sys_mprotect+0x78/0xc0 [ 69.734142] do_syscall_64+0x3f/0x90 [ 69.734433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.734829] [ 69.734967] Freed by task 13: [ 69.735210] kasan_save_stack+0x22/0x50 [ 69.735524] kasan_set_track+0x25/0x30 [ 69.735825] kasan_save_free_info+0x2b/0x50 [ 69.736155] __kasan_slab_free+0x10a/0x190 [ 69.736484] kmem_cache_free+0x10d/0x4d0 [ 69.736799] rcu_core+0x8c8/0x2860 [ 69.737074] __do_softirq+0x1b7/0x7d4 [ 69.737363] [ 69.737495] Last potentially related work creation: [ 69.737862] kasan_save_stack+0x22/0x50 [ 69.738170] __kasan_record_aux_stack+0x8e/0xa0 [ 69.738521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.738917] remove_vma+0x139/0x170 [ 69.739197] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.739539] do_vmi_munmap+0x1f1/0x2b0 [ 69.739844] __vm_munmap+0x138/0x3a0 [ 69.740128] __x64_sys_munmap+0x59/0x80 [ 69.740442] do_syscall_64+0x3f/0x90 [ 69.740737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.741158] [ 69.741292] The buggy address belongs to the object at ffff88801a0cecb0 [ 69.741292] which belongs to the cache vm_area_struct of size 168 [ 69.742212] The buggy address is located 88 bytes inside of [ 69.742212] freed 168-byte region [ffff88801a0cecb0, ffff88801a0ced58) [ 69.743090] [ 69.743221] The buggy address belongs to the physical page: [ 69.743629] page:0000000017fff8af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0ce [ 69.744330] memcg:ffff88801927c201 [ 69.744595] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.744997] page_type: 0xffffffff() [ 69.745272] raw: 0100000000000200 ffff88800879fc80 ffffea0000649ec0 0000000000000002 [ 69.745841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801927c201 [ 69.746404] page dumped because: kasan: bad access detected [ 69.746818] [ 69.746949] Memory state around the buggy address: [ 69.747311] ffff88801a0cec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 69.747841] ffff88801a0cec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.748386] >ffff88801a0ced00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.748925] ^ [ 69.749200] ffff88801a0ced80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.749734] ffff88801a0cee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 69.750266] ================================================================== [ 69.750911] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 72.236195] BUG: Bad rss-counter state mm:0000000022962310 type:MM_FILEPAGES val:33 [ 72.237233] BUG: Bad rss-counter state mm:0000000022962310 type:MM_ANONPAGES val:22 [ 72.718921] BUG: Bad rss-counter state mm:000000008053aac5 type:MM_FILEPAGES val:33 [ 72.720578] BUG: Bad rss-counter state mm:000000008053aac5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3657' (ECDSA) to the list of known hosts. 2023/06/20 07:36:52 fuzzer started 2023/06/20 07:36:52 dialing manager at localhost:44161 2023/06/20 07:36:53 checking machine... 2023/06/20 07:36:53 checking revisions... [ 73.403236] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:36:53 testing simple program... [ 73.445921] cgroup: Unknown subsys name 'net' [ 73.485586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:36:06 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc3a9aea48 CR3=0000000019d0a000 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=2032353a36333a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c96049 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888014797930 RBP=ffff888014797920 RSP=ffff888014797858 R8 =ffffffff864b024a R9 =ffff888014797908 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888014797928 R13=ffff888014797910 R14=ffff888014797f58 R15=ffff8880147978c8 RIP=ffffffff81131118 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 00007f37137d4900 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=00007f3713d8c0b0 CR3=000000000e8bc000 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