[ 24.429826] sshd (211) used greatest stack depth: 23992 bytes left [ 24.442744] BUG: Bad rss-counter state mm:000000002a3fc50c type:MM_FILEPAGES val:33 [ 24.444056] BUG: Bad rss-counter state mm:000000002a3fc50c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.587999] ================================================================== [ 24.588899] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.589821] Read of size 8 at addr ffff88800f0b5968 by task sshd/218 [ 24.590669] [ 24.590882] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.591742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.592689] Call Trace: [ 24.593003] [ 24.593289] dump_stack_lvl+0x91/0xf0 [ 24.593766] print_report+0xcc/0x620 [ 24.594232] ? __virt_addr_valid+0x102/0x340 [ 24.594786] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.595397] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.596012] kasan_report+0xbe/0xf0 [ 24.596484] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.597106] vma_interval_tree_remove+0xc75/0xec0 [ 24.597693] vma_prepare+0xc54/0x11a0 [ 24.598167] __split_vma+0x5af/0x950 [ 24.598631] ? __pfx___split_vma+0x10/0x10 [ 24.599283] ? find_held_lock+0x2c/0x110 [ 24.599825] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.600400] ? lock_is_held_type+0x9f/0x120 [ 24.600942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.601560] ? mtree_range_walk+0x632/0x900 [ 24.602109] ? mas_walk+0x5c7/0x7c0 [ 24.602597] do_vmi_munmap+0x1f1/0x2b0 [ 24.603109] mmap_region+0x1f9/0x2660 [ 24.603615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.604130] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.604852] ? __pfx_lock_acquire+0x10/0x10 [ 24.605403] ? __pfx_mmap_region+0x10/0x10 [ 24.605942] ? security_mmap_addr+0x7d/0xa0 [ 24.606493] ? get_unmapped_area+0x1f5/0x3f0 [ 24.607061] do_mmap+0x854/0xf00 [ 24.607527] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.608023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.608595] ksys_mmap_pgoff+0x3af/0x500 [ 24.609112] do_syscall_64+0x3f/0x90 [ 24.609590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.610249] RIP: 0033:0x7fa45468dd82 [ 24.610721] 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 [ 24.612898] RSP: 002b:00007fffcfd4f478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.613823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa45468dd82 [ 24.614686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa453ac7000 [ 24.615554] RBP: 00007fa453ac7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.616394] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb80a49ec0 [ 24.617277] R13: 00007fffcfd4f490 R14: 00007fffcfd4f4c0 R15: 00007fffcfd4f820 [ 24.618156] [ 24.618460] [ 24.618683] Allocated by task 211: [ 24.619141] kasan_save_stack+0x22/0x50 [ 24.619688] kasan_set_track+0x25/0x30 [ 24.620215] __kasan_slab_alloc+0x59/0x70 [ 24.620751] kmem_cache_alloc+0x16b/0x370 [ 24.621280] vm_area_dup+0x20/0x160 [ 24.621749] __split_vma+0x170/0x950 [ 24.622227] split_vma+0xc6/0x110 [ 24.622681] mprotect_fixup+0x8d2/0xb30 [ 24.623205] do_mprotect_pkey+0x87e/0xd40 [ 24.623755] __x64_sys_mprotect+0x78/0xc0 [ 24.624286] do_syscall_64+0x3f/0x90 [ 24.624777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.625438] [ 24.625660] Freed by task 211: [ 24.626071] kasan_save_stack+0x22/0x50 [ 24.626578] kasan_set_track+0x25/0x30 [ 24.627071] kasan_save_free_info+0x2b/0x50 [ 24.627622] __kasan_slab_free+0x10a/0x190 [ 24.628162] kmem_cache_free+0x10d/0x4d0 [ 24.628685] rcu_core+0x8c8/0x2860 [ 24.629136] __do_softirq+0x1b7/0x7d4 [ 24.629621] [ 24.629836] Last potentially related work creation: [ 24.630443] kasan_save_stack+0x22/0x50 [ 24.630960] __kasan_record_aux_stack+0x8e/0xa0 [ 24.631564] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.632215] remove_vma+0x139/0x170 [ 24.632681] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.633248] do_vmi_munmap+0x1f1/0x2b0 [ 24.633747] __vm_munmap+0x138/0x3a0 [ 24.634218] __x64_sys_munmap+0x59/0x80 [ 24.634722] do_syscall_64+0x3f/0x90 [ 24.635211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.635883] [ 24.636111] The buggy address belongs to the object at ffff88800f0b5910 [ 24.636111] which belongs to the cache vm_area_struct of size 168 [ 24.637599] The buggy address is located 88 bytes inside of [ 24.637599] freed 168-byte region [ffff88800f0b5910, ffff88800f0b59b8) [ 24.639015] [ 24.639237] The buggy address belongs to the physical page: [ 24.639931] page:00000000c30e416a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0b5 [ 24.641034] memcg:ffff888008de7e01 [ 24.641463] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.642181] page_type: 0xffffffff() [ 24.642640] raw: 0100000000000200 ffff88800879fc80 ffffea0000513c80 dead000000000003 [ 24.643583] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008de7e01 [ 24.644515] page dumped because: kasan: bad access detected [ 24.645205] [ 24.645430] Memory state around the buggy address: [ 24.646025] ffff88800f0b5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.646890] ffff88800f0b5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.647781] >ffff88800f0b5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.648663] ^ [ 24.649465] ffff88800f0b5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.650353] ffff88800f0b5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.651224] ================================================================== [ 24.652223] Disabling lock debugging due to kernel taint [ 26.611437] BUG: Bad rss-counter state mm:00000000c0f1532c type:MM_FILEPAGES val:33 [ 26.612673] BUG: Bad rss-counter state mm:00000000c0f1532c type:MM_ANONPAGES val:22 [ 27.025571] BUG: Bad rss-counter state mm:0000000042ae65d3 type:MM_FILEPAGES val:33 [ 27.026825] BUG: Bad rss-counter state mm:0000000042ae65d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8066' (ECDSA) to the list of known hosts. 2023/06/19 17:28:18 fuzzer started 2023/06/19 17:28:18 dialing manager at localhost:44161 2023/06/19 17:28:19 checking machine... 2023/06/19 17:28:19 checking revisions... [ 27.741551] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:28:19 testing simple program... [ 27.788453] cgroup: Unknown subsys name 'net' [ 27.843051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:28:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c132e RSP=ffff88806ce09950 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff88800cea42e0 RIP=ffffffff8135b8e5 RFL=00000247 [---Z-PC] 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 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=00007fe443a83f20 CR3=000000000f122000 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=3f0a6420695e8b9c084807d27a139908 XMM02=ec2efd57dc4c00df000000000011cc88 XMM03=5b91f2e4e05f82a2000000000011cd58 XMM04=0ef0e2b75befaf5b00000000000ae988 XMM05=751b9502027dc0b90000000000133a50 XMM06=bdf2e299e47b49d500000000001338d8 XMM07=e042d86d42eb936e0000000000124220 XMM08=5b91f2e4e05f82a2000000000011cd58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000890e646f RCX=ffff88806cb32378 RDX=000000000000000a RSI=0000000000000002 RDI=000000004acde210 RBP=ffff8880102114c0 RSP=ffff88800ff4fa58 R8 =000000006d016e5d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000cc0 R14=ffff88800ff4fac0 R15=000000000000000a RIP=ffffffff82270f2d 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 00007f28458f1900 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=00007ffe0e0f0000 CR3=0000000015c2c000 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=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