[ 39.934042] BUG: Bad rss-counter state mm:0000000007f58f7a type:MM_FILEPAGES val:33 [ 39.935640] BUG: Bad rss-counter state mm:0000000007f58f7a type:MM_ANONPAGES val:22 [ 40.104758] ================================================================== [ 40.105831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.106948] Read of size 8 at addr ffff88800dce8228 by task sshd/219 [ 40.107927] [ 40.108158] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.109011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.109991] Call Trace: [ 40.110311] [ 40.110593] dump_stack_lvl+0x91/0xf0 [ 40.111093] print_report+0xcc/0x620 [ 40.111574] ? __virt_addr_valid+0x102/0x340 [ 40.112142] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.112752] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.113373] kasan_report+0xbe/0xf0 [ 40.113848] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.114486] vma_interval_tree_remove+0xc75/0xec0 [ 40.115113] vma_prepare+0xc54/0x11a0 [ 40.115602] __split_vma+0x5af/0x950 [ 40.116115] ? __pfx___split_vma+0x10/0x10 [ 40.116663] ? find_held_lock+0x2c/0x110 [ 40.117204] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.117797] ? lock_is_held_type+0x9f/0x120 [ 40.118357] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.118982] ? mtree_range_walk+0x632/0x900 [ 40.119553] ? mas_walk+0x5c7/0x7c0 [ 40.120055] do_vmi_munmap+0x1f1/0x2b0 [ 40.120564] mmap_region+0x1f9/0x2660 [ 40.121065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.121584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.122289] ? __pfx_lock_acquire+0x10/0x10 [ 40.122813] ? __pfx_mmap_region+0x10/0x10 [ 40.123341] ? security_mmap_addr+0x7d/0xa0 [ 40.123870] ? get_unmapped_area+0x1f5/0x3f0 [ 40.124426] do_mmap+0x854/0xf00 [ 40.124863] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.125355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.125912] ksys_mmap_pgoff+0x3af/0x500 [ 40.126419] do_syscall_64+0x3f/0x90 [ 40.126898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.127540] RIP: 0033:0x7efd8d405d82 [ 40.128013] 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 [ 40.130138] RSP: 002b:00007ffe81bb9238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.131043] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd8d405d82 [ 40.131887] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd8c83f000 [ 40.132739] RBP: 00007efd8c83f000 R08: 0000000000000009 R09: 0000000000001000 [ 40.133583] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a0f97cec0 [ 40.134433] R13: 00007ffe81bb9250 R14: 00007ffe81bb9280 R15: 00007ffe81bb95e0 [ 40.135293] [ 40.135592] [ 40.135805] Allocated by task 212: [ 40.136243] kasan_save_stack+0x22/0x50 [ 40.136744] kasan_set_track+0x25/0x30 [ 40.137246] __kasan_slab_alloc+0x59/0x70 [ 40.137776] kmem_cache_alloc+0x16b/0x370 [ 40.138289] vm_area_dup+0x20/0x160 [ 40.138741] __split_vma+0x170/0x950 [ 40.139204] split_vma+0xc6/0x110 [ 40.139646] mprotect_fixup+0x8d2/0xb30 [ 40.140172] do_mprotect_pkey+0x87e/0xd40 [ 40.140685] __x64_sys_mprotect+0x78/0xc0 [ 40.141201] do_syscall_64+0x3f/0x90 [ 40.141673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.142315] [ 40.142532] Freed by task 13: Debian GNU/Li[ 40.142915] kasan_save_stack+0x22/0x50 nux 11 syzkaller[ 40.143716] kasan_set_track+0x25/0x30 ttyS0 syzkal[ 40.144445] kasan_save_free_info+0x2b/0x50 ler login: [ 40.145159] __kasan_slab_free+0x10a/0x190 [ 40.145813] kmem_cache_free+0x10d/0x4d0 [ 40.146322] rcu_core+0x8c8/0x2860 [ 40.146767] __do_softirq+0x1b7/0x7d4 [ 40.147244] [ 40.147465] Last potentially related work creation: [ 40.148067] kasan_save_stack+0x22/0x50 [ 40.148566] __kasan_record_aux_stack+0x8e/0xa0 [ 40.149146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.149803] remove_vma+0x139/0x170 [ 40.150265] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.150816] do_vmi_munmap+0x1f1/0x2b0 [ 40.151304] __vm_munmap+0x138/0x3a0 [ 40.151773] __x64_sys_munmap+0x59/0x80 [ 40.152287] do_syscall_64+0x3f/0x90 [ 40.152761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.153404] [ 40.153616] Second to last potentially related work creation: [ 40.154288] kasan_save_stack+0x22/0x50 [ 40.154792] __kasan_record_aux_stack+0x8e/0xa0 [ 40.155359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.156000] remove_vma+0x139/0x170 [ 40.156450] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.157005] do_vmi_munmap+0x1f1/0x2b0 [ 40.157487] mmap_region+0x1f9/0x2660 [ 40.157963] do_mmap+0x854/0xf00 [ 40.158389] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.158875] ksys_mmap_pgoff+0x3af/0x500 [ 40.159376] do_syscall_64+0x3f/0x90 [ 40.159855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.160521] [ 40.160740] The buggy address belongs to the object at ffff88800dce81d0 [ 40.160740] which belongs to the cache vm_area_struct of size 168 [ 40.162229] The buggy address is located 88 bytes inside of [ 40.162229] freed 168-byte region [ffff88800dce81d0, ffff88800dce8278) [ 40.163638] [ 40.163852] The buggy address belongs to the physical page: [ 40.164510] page:00000000d3ebd22a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdce8 [ 40.165580] memcg:ffff88800d784d01 [ 40.166005] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.166700] page_type: 0xffffffff() [ 40.167151] raw: 0100000000000200 ffff88800879fc80 ffffea00003321c0 dead000000000007 [ 40.168082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d784d01 [ 40.168980] page dumped because: kasan: bad access detected [ 40.169637] [ 40.169853] Memory state around the buggy address: [ 40.170427] ffff88800dce8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.171278] ffff88800dce8180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.172140] >ffff88800dce8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.172998] ^ [ 40.173575] ffff88800dce8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 40.174457] ffff88800dce8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 40.175332] ================================================================== [ 40.176367] Disabling lock debugging due to kernel taint [ 42.138362] BUG: Bad rss-counter state mm:00000000e5c4cb3d type:MM_FILEPAGES val:33 [ 42.139390] BUG: Bad rss-counter state mm:00000000e5c4cb3d type:MM_ANONPAGES val:22 [ 42.697310] BUG: Bad rss-counter state mm:000000009c99f247 type:MM_FILEPAGES val:33 [ 42.698368] BUG: Bad rss-counter state mm:000000009c99f247 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8251' (ECDSA) to the list of known hosts. 2023/06/19 21:43:27 fuzzer started 2023/06/19 21:43:28 dialing manager at localhost:44161 2023/06/19 21:43:28 checking machine... 2023/06/19 21:43:28 checking revisions... [ 43.353173] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:43:28 testing simple program... [ 43.398933] cgroup: Unknown subsys name 'net' [ 43.460942] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:43:11 Registers: info registers vcpu 0 RAX=0000000000000286 RBX=ffff88806ce3a2c0 RCX=ffffffff8135ee28 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=0000000000000009 RBP=000000000000009f RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=fffffffffffffff6 R13=ffff88806ce09ee8 R14=ffff88806ce3a360 R15=0000000000000200 RIP=ffffffff8118e80b 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 00007fb6b20a7900 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=00007ffc9a7d8000 CR3=0000000013f5a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f346a5fb700 CR3=000000000dbe0000 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=2037323a33343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000