syzkaller login: [ 65.977415] BUG: Bad rss-counter state mm:00000000b808d2be type:MM_FILEPAGES val:33 [ 65.978946] BUG: Bad rss-counter state mm:00000000b808d2be type:MM_ANONPAGES val:22 [ 66.142019] ================================================================== [ 66.143098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.144199] Read of size 8 at addr ffff88800f02a228 by task sshd/229 [ 66.145259] [ 66.145520] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.146568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.147647] Call Trace: [ 66.147973] [ 66.148253] dump_stack_lvl+0x91/0xf0 [ 66.148752] print_report+0xcc/0x620 [ 66.149239] ? __virt_addr_valid+0x102/0x340 [ 66.149790] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.150422] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.151034] kasan_report+0xbe/0xf0 [ 66.151529] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.152178] vma_interval_tree_remove+0xc75/0xec0 [ 66.152800] vma_prepare+0xc54/0x11a0 [ 66.153303] __split_vma+0x5af/0x950 [ 66.153786] ? __pfx___split_vma+0x10/0x10 [ 66.154346] ? find_held_lock+0x2c/0x110 [ 66.154881] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.155469] ? lock_is_held_type+0x9f/0x120 [ 66.156031] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.156666] ? mtree_range_walk+0x632/0x900 [ 66.157238] ? mas_walk+0x5c7/0x7c0 [ 66.157738] do_vmi_munmap+0x1f1/0x2b0 [ 66.158270] mmap_region+0x1f9/0x2660 [ 66.158777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.159307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.160044] ? __pfx_lock_acquire+0x10/0x10 [ 66.160601] ? __pfx_mmap_region+0x10/0x10 [ 66.161152] ? security_mmap_addr+0x7d/0xa0 [ 66.161710] ? get_unmapped_area+0x1f5/0x3f0 [ 66.162283] do_mmap+0x854/0xf00 [ 66.162740] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.163251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.163836] ksys_mmap_pgoff+0x3af/0x500 [ 66.164359] do_syscall_64+0x3f/0x90 [ 66.164850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.165522] RIP: 0033:0x7f3d8d80bd82 [ 66.166005] 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 [ 66.168228] RSP: 002b:00007ffda1a602d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.169171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d8d80bd82 [ 66.170051] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d8cc45000 [ 66.170972] RBP: 00007f3d8cc45000 R08: 0000000000000009 R09: 0000000000001000 [ 66.171857] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628df922ec0 [ 66.172742] R13: 00007ffda1a602f0 R14: 00007ffda1a60320 R15: 00007ffda1a60680 [ 66.173643] [ 66.173950] [ 66.174177] Allocated by task 221: [ 66.174635] kasan_save_stack+0x22/0x50 [ 66.175164] kasan_set_track+0x25/0x30 [ 66.175678] __kasan_slab_alloc+0x59/0x70 [ 66.176220] kmem_cache_alloc+0x16b/0x370 [ 66.176757] vm_area_dup+0x20/0x160 [ 66.177234] __split_vma+0x170/0x950 [ 66.177726] split_vma+0xc6/0x110 [ 66.178179] mprotect_fixup+0x8d2/0xb30 [ 66.178712] do_mprotect_pkey+0x87e/0xd40 [ 66.179263] __x64_sys_mprotect+0x78/0xc0 [ 66.179801] do_syscall_64+0x3f/0x90 [ 66.180297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.180965] [ 66.181189] Freed by task 13: [ 66.181583] kasan_save_stack+0x22/0x50 [ 66.182108] kasan_set_track+0x25/0x30 [ 66.182640] kasan_save_free_info+0x2b/0x50 [ 66.183198] __kasan_slab_free+0x10a/0x190 [ 66.183755] kmem_cache_free+0x10d/0x4d0 [ 66.184290] rcu_core+0x8c8/0x2860 [ 66.184755] __do_softirq+0x1b7/0x7d4 [ 66.185258] [ 66.185484] Last potentially related work creation: [ 66.186162] kasan_save_stack+0x22/0x50 [ 66.186694] __kasan_record_aux_stack+0x8e/0xa0 [ 66.187308] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.187978] remove_vma+0x139/0x170 [ 66.188447] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.189028] do_vmi_munmap+0x1f1/0x2b0 [ 66.189529] __vm_munmap+0x138/0x3a0 [ 66.190016] __x64_sys_munmap+0x59/0x80 [ 66.190554] do_syscall_64+0x3f/0x90 [ 66.191042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.191700] [ 66.191924] The buggy address belongs to the object at ffff88800f02a1d0 [ 66.191924] which belongs to the cache vm_area_struct of size 168 [ 66.193465] The buggy address is located 88 bytes inside of [ 66.193465] freed 168-byte region [ffff88800f02a1d0, ffff88800f02a278) [ 66.194956] [ 66.195180] The buggy address belongs to the physical page: [ 66.195874] page:000000004c0278e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf02a [ 66.197013] memcg:ffff888015d09301 [ 66.197458] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.198134] page_type: 0xffffffff() [ 66.198607] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.199562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d09301 [ 66.200514] page dumped because: kasan: bad access detected [ 66.201204] [ 66.201426] Memory state around the buggy address: [ 66.202027] ffff88800f02a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.202946] ffff88800f02a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 66.203835] >ffff88800f02a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 66.204726] ^ [ 66.205308] ffff88800f02a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 66.206190] ffff88800f02a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 66.207097] ================================================================== [ 66.208130] Disabling lock debugging due to kernel taint [ 68.692042] BUG: Bad rss-counter state mm:00000000b0a8f294 type:MM_FILEPAGES val:33 [ 68.693049] BUG: Bad rss-counter state mm:00000000b0a8f294 type:MM_ANONPAGES val:22 [ 69.158815] BUG: Bad rss-counter state mm:0000000083a91d85 type:MM_FILEPAGES val:33 [ 69.159945] BUG: Bad rss-counter state mm:0000000083a91d85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42322' (ECDSA) to the list of known hosts. 2023/06/19 12:46:24 fuzzer started 2023/06/19 12:46:24 dialing manager at localhost:44161 2023/06/19 12:46:24 checking machine... 2023/06/19 12:46:24 checking revisions... [ 69.789426] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:46:25 testing simple program... [ 69.837516] cgroup: Unknown subsys name 'net' [ 69.893516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:46:24 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=ffff88806ce2c5a0 RCX=0000000080010001 RDX=ffff888015e2b680 RSI=ffffffff844d4cba RDI=0000000000000006 RBP=ffff88806ce2c250 RSP=ffff88806ce09dd8 R8 =0000000000000006 R9 =0000001008e98b40 R10=00000010e38c8aec R11=0000000000000001 R12=dffffc0000000000 R13=0000001008e98b40 R14=0000000000000001 R15=ffff88806ce2c5b0 RIP=ffffffff814c07f1 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 00007fd2193b3900 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=00007fd21996a618 CR3=000000001b53c000 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=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 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=ffff888008c58400 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=00007fa389b890b0 CR3=000000000975c000 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=1d5d2fbfd030af884f439f3633a6097f XMM02=0000000000120330ec2efd57dc4c00df XMM03=0000000000124a68c974d4aead1b6899 XMM04=ca6040e6dbe17b6100000000000ae988 XMM05=07c8bb74b6c04a440000000000134c78 XMM06=d74844bf967d85ba0000000000134b00 XMM07=e042d86d42eb936e0000000000124ce8 XMM08=c974d4aead1b68990000000000120390 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000