Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.006438] BUG: Bad rss-counter state mm:000000002b2f48fb type:MM_FILEPAGES val:33 [ 31.007403] BUG: Bad rss-counter state mm:000000002b2f48fb type:MM_ANONPAGES val:22 [ 31.166692] ================================================================== [ 31.167574] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.168480] Read of size 8 at addr ffff88800e0e3228 by task sshd/219 [ 31.169231] [ 31.169567] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.170401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.171336] Call Trace: [ 31.171662] [ 31.171939] dump_stack_lvl+0x91/0xf0 [ 31.172412] print_report+0xcc/0x620 [ 31.172881] ? __virt_addr_valid+0x102/0x340 [ 31.173439] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174034] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174633] kasan_report+0xbe/0xf0 [ 31.175093] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175695] vma_interval_tree_remove+0xc75/0xec0 [ 31.176278] vma_prepare+0xc54/0x11a0 [ 31.176741] __split_vma+0x5af/0x950 [ 31.177207] ? __pfx___split_vma+0x10/0x10 [ 31.177723] ? find_held_lock+0x2c/0x110 [ 31.178224] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.178772] ? lock_is_held_type+0x9f/0x120 [ 31.179298] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.179901] ? mtree_range_walk+0x632/0x900 [ 31.180451] ? mas_walk+0x5c7/0x7c0 [ 31.180924] do_vmi_munmap+0x1f1/0x2b0 [ 31.181450] mmap_region+0x1f9/0x2660 [ 31.181928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.182441] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.183152] ? __pfx_lock_acquire+0x10/0x10 [ 31.183678] ? __pfx_mmap_region+0x10/0x10 [ 31.184207] ? security_mmap_addr+0x7d/0xa0 [ 31.184729] ? get_unmapped_area+0x1f5/0x3f0 [ 31.185279] do_mmap+0x854/0xf00 [ 31.185712] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.186203] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.186758] ksys_mmap_pgoff+0x3af/0x500 [ 31.187265] do_syscall_64+0x3f/0x90 [ 31.187741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188379] RIP: 0033:0x7fe8c0b12d82 [ 31.188831] 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 [ 31.190953] RSP: 002b:00007ffc39e14d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.191856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8c0b12d82 [ 31.192700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8bff4c000 [ 31.193560] RBP: 00007fe8bff4c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.194398] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c304b2f70 [ 31.195233] R13: 00007ffc39e14d90 R14: 00007ffc39e14dc0 R15: 00007ffc39e15120 [ 31.196079] [ 31.196372] [ 31.196584] Allocated by task 212: [ 31.197011] kasan_save_stack+0x22/0x50 [ 31.197523] kasan_set_track+0x25/0x30 [ 31.198010] __kasan_slab_alloc+0x59/0x70 [ 31.198526] kmem_cache_alloc+0x16b/0x370 [ 31.199038] vm_area_dup+0x20/0x160 [ 31.199491] __split_vma+0x170/0x950 [ 31.199958] split_vma+0xc6/0x110 [ 31.200397] mprotect_fixup+0x8d2/0xb30 [ 31.200892] do_mprotect_pkey+0x87e/0xd40 [ 31.201427] __x64_sys_mprotect+0x78/0xc0 [ 31.201949] do_syscall_64+0x3f/0x90 [ 31.202422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203078] [ 31.203292] Freed by task 212: [ 31.203679] kasan_save_stack+0x22/0x50 [ 31.204176] kasan_set_track+0x25/0x30 [ 31.204668] kasan_save_free_info+0x2b/0x50 [ 31.205199] __kasan_slab_free+0x10a/0x190 [ 31.205725] kmem_cache_free+0x10d/0x4d0 [ 31.206234] rcu_core+0x8c8/0x2860 [ 31.206679] __do_softirq+0x1b7/0x7d4 [ 31.207150] [ 31.207362] Last potentially related work creation: [ 31.207944] kasan_save_stack+0x22/0x50 [ 31.208441] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.209680] remove_vma+0x139/0x170 [ 31.210139] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.210697] do_vmi_munmap+0x1f1/0x2b0 [ 31.211183] __vm_munmap+0x138/0x3a0 [ 31.211651] __x64_sys_munmap+0x59/0x80 [ 31.212146] do_syscall_64+0x3f/0x90 [ 31.212622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213270] [ 31.213486] The buggy address belongs to the object at ffff88800e0e31d0 [ 31.213486] which belongs to the cache vm_area_struct of size 168 [ 31.214959] The buggy address is located 88 bytes inside of [ 31.214959] freed 168-byte region [ffff88800e0e31d0, ffff88800e0e3278) [ 31.216364] [ 31.216579] The buggy address belongs to the physical page: [ 31.217250] page:00000000e83d29f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0e3 [ 31.218329] memcg:ffff88800df4ae01 [ 31.218758] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.219450] page_type: 0xffffffff() [ 31.219902] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386600 dead000000000005 [ 31.220815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df4ae01 [ 31.221747] page dumped because: kasan: bad access detected [ 31.222404] [ 31.222635] Memory state around the buggy address: [ 31.223220] ffff88800e0e3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.224081] ffff88800e0e3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.224955] >ffff88800e0e3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.225821] ^ [ 31.226398] ffff88800e0e3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.227282] ffff88800e0e3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.228141] ================================================================== [ 31.229474] Disabling lock debugging due to kernel taint [ 33.361218] BUG: Bad rss-counter state mm:000000002c23d13f type:MM_FILEPAGES val:33 [ 33.362181] BUG: Bad rss-counter state mm:000000002c23d13f type:MM_ANONPAGES val:22 [ 33.922297] BUG: Bad rss-counter state mm:000000003316d4d6 type:MM_FILEPAGES val:33 [ 33.923533] BUG: Bad rss-counter state mm:000000003316d4d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4828' (ECDSA) to the list of known hosts. 2023/06/21 06:10:25 fuzzer started 2023/06/21 06:10:25 dialing manager at localhost:36067 2023/06/21 06:10:25 checking machine... 2023/06/21 06:10:25 checking revisions... [ 34.625456] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:10:25 testing simple program... [ 34.677407] cgroup: Unknown subsys name 'net' [ 34.732998] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:10:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f71b00df650 CR3=000000000deec000 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=2034323a30313a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30313a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002d98e85 RCX=0000000000000002 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888016cc7418 R8 =0000000000000000 R9 =0000000000000000 R10=000000000000009e R11=00000af900000af9 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f06 RFL=00000256 [---ZAP-] 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 00007f71afb2a900 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=00007f71b00e1618 CR3=000000001bf50000 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=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