[ 31.231739] BUG: Bad rss-counter state mm:0000000033e0ce6e type:MM_FILEPAGES val:33 [ 31.232849] BUG: Bad rss-counter state mm:0000000033e0ce6e type:MM_ANONPAGES val:22 [ 31.396775] ================================================================== [ 31.397699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.398662] Read of size 8 at addr ffff88800dcf0d08 by task sshd/219 [ 31.399488] [ 31.399724] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.400589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.401572] Call Trace: [ 31.401895] [ 31.402209] dump_stack_lvl+0x91/0xf0 [ 31.402704] print_report+0xcc/0x620 [ 31.403193] ? __virt_addr_valid+0x102/0x340 [ 31.403763] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404389] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405016] kasan_report+0xbe/0xf0 [ 31.405496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.406134] vma_interval_tree_remove+0xc75/0xec0 [ 31.406754] vma_prepare+0xc54/0x11a0 [ 31.407246] __split_vma+0x5af/0x950 [ 31.407736] ? __pfx___split_vma+0x10/0x10 [ 31.408274] ? find_held_lock+0x2c/0x110 [ 31.408835] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.409410] ? lock_is_held_type+0x9f/0x120 [ 31.409970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.410599] ? mtree_range_walk+0x632/0x900 [ 31.411165] ? mas_walk+0x5c7/0x7c0 [ 31.411651] do_vmi_munmap+0x1f1/0x2b0 [ 31.412159] mmap_region+0x1f9/0x2660 [ 31.412650] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.413178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.413911] ? __pfx_lock_acquire+0x10/0x10 [ 31.414481] ? __pfx_mmap_region+0x10/0x10 [ 31.415024] ? security_mmap_addr+0x7d/0xa0 [ 31.415572] ? get_unmapped_area+0x1f5/0x3f0 [ 31.416142] do_mmap+0x854/0xf00 [ 31.416584] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.417107] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.417688] ksys_mmap_pgoff+0x3af/0x500 [ 31.418209] do_syscall_64+0x3f/0x90 [ 31.418705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.419366] RIP: 0033:0x7f6377fb6d82 [ 31.419827] 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 [ 31.422010] RSP: 002b:00007ffe6c9025d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.422952] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6377fb6d82 [ 31.423835] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63773f0000 [ 31.424710] RBP: 00007f63773f0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.425577] R10: 0000000000000812 R11: 0000000000000206 R12: 000056081817cb20 [ 31.426461] R13: 00007ffe6c9025f0 R14: 00007ffe6c902620 R15: 00007ffe6c902980 [ 31.427338] [ 31.427638] [ 31.427861] Allocated by task 212: [ 31.428305] kasan_save_stack+0x22/0x50 [ 31.428830] kasan_set_track+0x25/0x30 [ 31.429330] __kasan_slab_alloc+0x59/0x70 [ 31.429874] kmem_cache_alloc+0x16b/0x370 [ 31.430419] vm_area_dup+0x20/0x160 [ 31.430894] __split_vma+0x170/0x950 [ 31.431382] split_vma+0xc6/0x110 [ 31.431852] mprotect_fixup+0x8d2/0xb30 [ 31.432373] do_mprotect_pkey+0x87e/0xd40 [ 31.432915] __x64_sys_mprotect+0x78/0xc0 [ 31.433444] do_syscall_64+0x3f/0x90 [ 31.433950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434617] [ 31.434840] Freed by task 212: [ 31.435244] kasan_save_stack+0x22/0x50 [ 31.435755] kasan_set_track+0x25/0x30 [ 31.436267] kasan_save_free_info+0x2b/0x50 [ 31.436837] __kasan_slab_free+0x10a/0x190 [ 31.437394] kmem_cache_free+0x10d/0x4d0 [ 31.437919] rcu_core+0x8c8/0x2860 [ 31.438406] __do_softirq+0x1b7/0x7d4 [ 31.438906] [ 31.439129] Last potentially related work creation: [ 31.439732] kasan_save_stack+0x22/0x50 [ 31.440246] __kasan_record_aux_stack+0x8e/0xa0 [ 31.440838] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.441493] remove_vma+0x139/0x170 [ 31.441979] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.442572] do_vmi_munmap+0x1f1/0x2b0 [ 31.443077] __vm_munmap+0x138/0x3a0 [ 31.443566] __x64_sys_munmap+0x59/0x80 [ 31.444079] do_syscall_64+0x3f/0x90 [ 31.444586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.445254] [ 31.445471] Second to last potentially related work creation: [ 31.446190] kasan_save_stack+0x22/0x50 [ 31.446701] __kasan_record_aux_stack+0x8e/0xa0 [ 31.447283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.447945] remove_vma+0x139/0x170 [ 31.448404] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.448977] do_vmi_munmap+0x1f1/0x2b0 [ 31.449472] mmap_region+0x1f9/0x2660 [ 31.449970] do_mmap+0x854/0xf00 [ 31.450431] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.450929] ksys_mmap_pgoff+0x3af/0x500 [ 31.451446] do_syscall_64+0x3f/0x90 [ 31.451944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.452619] [ 31.452853] The buggy address belongs to the object at ffff88800dcf0cb0 [ 31.452853] which belongs to the cache vm_area_struct of size 168 [ 31.454384] The buggy address is located 88 bytes inside of [ 31.454384] freed 168-byte region [ffff88800dcf0cb0, ffff88800dcf0d58) [ 31.455857] [ 31.456083] The buggy address belongs to the physical page: [ 31.456777] page:000000006283a9ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcf0 [ 31.457892] memcg:ffff88800e79ba01 [ 31.458355] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.459089] page_type: 0xffffffff() [ 31.459554] raw: 0100000000000200 ffff88800879fc80 ffffea00003826c0 dead000000000003 [ 31.460531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e79ba01 [ 31.461483] page dumped because: kasan: bad access detected [ 31.462192] [ 31.462408] Memory state around the buggy address: [ 31.463022] ffff88800dcf0c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.463929] ffff88800dcf0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.464816] >ffff88800dcf0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.465696] ^ [ 31.466152] ffff88800dcf0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.467051] ffff88800dcf0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.467938] ================================================================== [ 31.469138] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.402906] BUG: Bad rss-counter state mm:00000000c4745752 type:MM_FILEPAGES val:31 [ 33.403898] BUG: Bad rss-counter state mm:00000000c4745752 type:MM_ANONPAGES val:22 [ 33.950566] BUG: Bad rss-counter state mm:00000000da7442ca type:MM_FILEPAGES val:33 [ 33.951740] BUG: Bad rss-counter state mm:00000000da7442ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61310' (ECDSA) to the list of known hosts. 2023/06/19 22:26:47 fuzzer started 2023/06/19 22:26:48 dialing manager at localhost:44161 2023/06/19 22:26:48 checking machine... 2023/06/19 22:26:48 checking revisions... [ 34.589461] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:26:48 testing simple program... [ 34.636820] cgroup: Unknown subsys name 'net' [ 34.674344] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:26:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000fe0 RSI=00007fe182f14b31 RDI=ffff888018112220 RBP=00007fe182f14b31 RSP=ffff88800f137d18 R8 =ffff88800f137d20 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007fe182f14b31 R13=ffff888018112220 R14=ffff888018112220 R15=ffffffff85d3ce80 RIP=ffffffff814c07e4 RFL=00000282 [--S----] 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 00007fe182f39900 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=00007ffc20d6d000 CR3=000000000e7da000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff8180c585 RBP=ffff88806cf09af0 RSP=ffff88806cf09a88 R8 =ffffffff8613751e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff8880103b3ec0 RIP=ffffffff811303b9 RFL=00000246 [---Z-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=00007f8029125ef0 CR3=0000000019380000 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=2037343a36323a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000