syzkaller login: [ 31.301323] BUG: Bad rss-counter state mm:00000000605a2fc5 type:MM_FILEPAGES val:33 [ 31.302950] BUG: Bad rss-counter state mm:00000000605a2fc5 type:MM_ANONPAGES val:22 [ 31.476779] ================================================================== [ 31.477920] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.479130] Read of size 8 at addr ffff88800e11cd08 by task sshd/220 [ 31.480226] [ 31.480504] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.481587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.482994] Call Trace: [ 31.483436] [ 31.483830] dump_stack_lvl+0x91/0xf0 [ 31.484508] print_report+0xcc/0x620 [ 31.485165] ? __virt_addr_valid+0x102/0x340 [ 31.485913] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.486761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.487597] kasan_report+0xbe/0xf0 [ 31.488240] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.489085] vma_interval_tree_remove+0xc75/0xec0 [ 31.489912] vma_prepare+0xc54/0x11a0 [ 31.490572] __split_vma+0x5af/0x950 [ 31.491248] ? __pfx___split_vma+0x10/0x10 [ 31.491839] ? find_held_lock+0x2c/0x110 [ 31.492300] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.492801] ? lock_is_held_type+0x9f/0x120 [ 31.493281] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.493822] ? mtree_range_walk+0x632/0x900 [ 31.494312] ? mas_walk+0x5c7/0x7c0 [ 31.494742] do_vmi_munmap+0x1f1/0x2b0 [ 31.495170] mmap_region+0x1f9/0x2660 [ 31.495600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.496047] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.496677] ? __pfx_lock_acquire+0x10/0x10 [ 31.497141] ? __pfx_mmap_region+0x10/0x10 [ 31.497605] ? security_mmap_addr+0x7d/0xa0 [ 31.498069] ? get_unmapped_area+0x1f5/0x3f0 [ 31.498549] do_mmap+0x854/0xf00 [ 31.498951] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.499391] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.499894] ksys_mmap_pgoff+0x3af/0x500 [ 31.500338] do_syscall_64+0x3f/0x90 [ 31.500777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.501352] RIP: 0033:0x7f7a0835fd82 [ 31.501758] 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 [ 31.503664] RSP: 002b:00007ffc39842b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.504464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a0835fd82 [ 31.505216] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a07799000 [ 31.505960] RBP: 00007f7a07799000 R08: 0000000000000009 R09: 0000000000001000 [ 31.506724] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612d3d8cf70 [ 31.507480] R13: 00007ffc39842b60 R14: 00007ffc39842b90 R15: 00007ffc39842ef0 [ 31.508241] [ 31.508500] [ 31.508694] Allocated by task 213: [ 31.509080] kasan_save_stack+0x22/0x50 [ 31.509530] kasan_set_track+0x25/0x30 [ 31.510107] __kasan_slab_alloc+0x59/0x70 [ 31.510589] kmem_cache_alloc+0x16b/0x370 [ 31.511104] vm_area_dup+0x20/0x160 [ 31.511523] __split_vma+0x170/0x950 [ 31.511953] split_vma+0xc6/0x110 [ 31.512370] mprotect_fixup+0x8d2/0xb30 [ 31.512849] do_mprotect_pkey+0x87e/0xd40 [ 31.513335] __x64_sys_mprotect+0x78/0xc0 [ 31.513838] do_syscall_64+0x3f/0x90 [ 31.514295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.514917] [ 31.515123] Freed by task 213: [ 31.515500] kasan_save_stack+0x22/0x50 [ 31.516106] kasan_set_track+0x25/0x30 [ 31.516555] kasan_save_free_info+0x2b/0x50 [ 31.517037] __kasan_slab_free+0x10a/0x190 [ 31.517518] kmem_cache_free+0x10d/0x4d0 [ 31.517986] rcu_core+0x8c8/0x2860 [ 31.518376] __do_softirq+0x1b7/0x7d4 [ 31.518821] [ 31.519023] Last potentially related work creation: [ 31.519554] kasan_save_stack+0x22/0x50 [ 31.520010] __kasan_record_aux_stack+0x8e/0xa0 [ 31.520526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.521179] remove_vma+0x139/0x170 [ 31.521595] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.522104] do_vmi_munmap+0x1f1/0x2b0 [ 31.522544] __vm_munmap+0x138/0x3a0 [ 31.522985] __x64_sys_munmap+0x59/0x80 [ 31.523438] do_syscall_64+0x3f/0x90 [ 31.523862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.524444] [ 31.524645] The buggy address belongs to the object at ffff88800e11ccb0 [ 31.524645] which belongs to the cache vm_area_struct of size 168 [ 31.525978] The buggy address is located 88 bytes inside of [ 31.525978] freed 168-byte region [ffff88800e11ccb0, ffff88800e11cd58) [ 31.527273] [ 31.527476] The buggy address belongs to the physical page: [ 31.528066] page:00000000222a755f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe11c [ 31.529051] memcg:ffff88800dd7c101 [ 31.529439] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.530031] page_type: 0xffffffff() [ 31.530440] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.531294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd7c101 [ 31.532127] page dumped because: kasan: bad access detected [ 31.532734] [ 31.532930] Memory state around the buggy address: [ 31.533460] ffff88800e11cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.534244] ffff88800e11cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.535030] >ffff88800e11cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.535811] ^ [ 31.536215] ffff88800e11cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.536999] ffff88800e11ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.537779] ================================================================== [ 31.538728] Disabling lock debugging due to kernel taint [ 33.743644] BUG: Bad rss-counter state mm:0000000004d9979a type:MM_FILEPAGES val:33 [ 33.744715] BUG: Bad rss-counter state mm:0000000004d9979a type:MM_ANONPAGES val:22 [ 34.328755] BUG: Bad rss-counter state mm:000000007e50f0a7 type:MM_FILEPAGES val:33 [ 34.329930] BUG: Bad rss-counter state mm:000000007e50f0a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34290' (ECDSA) to the list of known hosts. 2023/06/20 23:50:41 fuzzer started 2023/06/20 23:50:41 dialing manager at localhost:36067 2023/06/20 23:50:41 checking machine... 2023/06/20 23:50:41 checking revisions... [ 34.905000] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:50:41 testing simple program... [ 34.952350] cgroup: Unknown subsys name 'net' [ 34.982312] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:50:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000056329a147a50 RCX=0000000000000000 RDX=0000000000000001 RSI=000056329b26de00 RDI=000056329b271a20 RBP=00007f52480069c0 RSP=00007f524db69850 R8 =00007f5248006bc8 R9 =0000000000000000 R10=0000000000000009 R11=0000000000000286 R12=00007f524db698d0 R13=000056329b26de00 R14=000056329a147ec0 R15=000056329b271a20 RIP=000056329a0fe892 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f524db6a700 00000000 00000000 GS =0000 0000000000000000 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=00007feccb991650 CR3=000000000dd3c000 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=72662064657463656e6e6f6373694420 XMM01=2e303120746f6f722072657375206d6f XMM02=6f63736964203a31313a363533313420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a30353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e266528 RCX=ffffffff812e0135 RDX=1ffff11002b2bf89 RSI=ffffffff87b89f80 RDI=ffff88800e266530 RBP=ffff88800e266528 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800e266529 R13=ffff88801c9ded78 R14=ffff88801595fc48 R15=ffffffff87b89f80 RIP=ffffffff844d28bc RFL=00000046 [---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 00007f3601325900 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=00007f36007a5310 CR3=00000000102ec000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f267cdaab678213e00000000000ae988 XMM05=c6d00d5bc7a15cfa0000000000132990 XMM06=4fda316b135da52b0000000000131780 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000