syzkaller login: [ 30.251256] BUG: Bad rss-counter state mm:000000008ffa83e8 type:MM_FILEPAGES val:32 [ 30.252014] BUG: Bad rss-counter state mm:000000008ffa83e8 type:MM_ANONPAGES val:22 [ 30.479017] ================================================================== [ 30.479608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.480215] Read of size 8 at addr ffff88800dcab228 by task sshd/224 [ 30.480710] [ 30.480854] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.481429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.482047] Call Trace: [ 30.482252] [ 30.482435] dump_stack_lvl+0x91/0xf0 [ 30.482755] print_report+0xcc/0x620 [ 30.483073] ? __virt_addr_valid+0x102/0x340 [ 30.483434] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.483831] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.484232] kasan_report+0xbe/0xf0 [ 30.484539] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.484938] vma_interval_tree_remove+0xc75/0xec0 [ 30.485378] vma_prepare+0xc54/0x11a0 [ 30.486735] __split_vma+0x5af/0x950 [ 30.487040] ? __pfx___split_vma+0x10/0x10 [ 30.487378] ? find_held_lock+0x2c/0x110 [ 30.487714] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.488073] ? lock_is_held_type+0x9f/0x120 [ 30.488419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.488832] ? mtree_range_walk+0x632/0x900 [ 30.489211] ? mas_walk+0x5c7/0x7c0 [ 30.489518] do_vmi_munmap+0x1f1/0x2b0 [ 30.489833] mmap_region+0x1f9/0x2660 [ 30.490143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.490471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.490927] ? __pfx_lock_acquire+0x10/0x10 [ 30.491269] ? __pfx_mmap_region+0x10/0x10 [ 30.491609] ? security_mmap_addr+0x7d/0xa0 [ 30.491957] ? get_unmapped_area+0x1f5/0x3f0 [ 30.492307] do_mmap+0x854/0xf00 [ 30.492589] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.492907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.493286] ksys_mmap_pgoff+0x3af/0x500 [ 30.493613] do_syscall_64+0x3f/0x90 [ 30.493922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.494339] RIP: 0033:0x7f10c6074d82 [ 30.494633] 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 [ 30.495983] RSP: 002b:00007ffc8e12f578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.496558] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10c6074d82 [ 30.497146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10c54ae000 [ 30.497685] RBP: 00007f10c54ae000 R08: 0000000000000009 R09: 0000000000001000 [ 30.498222] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b02b0f6ec0 [ 30.498758] R13: 00007ffc8e12f590 R14: 00007ffc8e12f5c0 R15: 00007ffc8e12f920 [ 30.499302] [ 30.499491] [ 30.499630] Allocated by task 215: [ 30.499948] kasan_save_stack+0x22/0x50 [ 30.500360] kasan_set_track+0x25/0x30 [ 30.500747] __kasan_slab_alloc+0x59/0x70 [ 30.501182] kmem_cache_alloc+0x16b/0x370 [ 30.501604] vm_area_dup+0x20/0x160 [ 30.501988] __split_vma+0x170/0x950 [ 30.502352] split_vma+0xc6/0x110 [ 30.502720] mprotect_fixup+0x8d2/0xb30 [ 30.503134] do_mprotect_pkey+0x87e/0xd40 [ 30.503552] __x64_sys_mprotect+0x78/0xc0 [ 30.503968] do_syscall_64+0x3f/0x90 [ 30.504380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.504919] [ 30.506866] Freed by task 205: [ 30.507124] kasan_save_stack+0x22/0x50 [ 30.507450] kasan_set_track+0x25/0x30 [ 30.507769] kasan_save_free_info+0x2b/0x50 [ 30.508114] __kasan_slab_free+0x10a/0x190 [ 30.508448] kmem_cache_free+0x10d/0x4d0 [ 30.508776] rcu_core+0x8c8/0x2860 [ 30.509080] __do_softirq+0x1b7/0x7d4 [ 30.509390] [ 30.509529] Last potentially related work creation: [ 30.509901] kasan_save_stack+0x22/0x50 [ 30.510222] __kasan_record_aux_stack+0x8e/0xa0 [ 30.510587] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.510998] remove_vma+0x139/0x170 [ 30.511286] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.511640] do_vmi_munmap+0x1f1/0x2b0 [ 30.511950] __vm_munmap+0x138/0x3a0 [ 30.512248] __x64_sys_munmap+0x59/0x80 [ 30.512565] do_syscall_64+0x3f/0x90 [ 30.512870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.513295] [ 30.513435] The buggy address belongs to the object at ffff88800dcab1d0 [ 30.513435] which belongs to the cache vm_area_struct of size 168 [ 30.514364] The buggy address is located 88 bytes inside of [ 30.514364] freed 168-byte region [ffff88800dcab1d0, ffff88800dcab278) [ 30.515253] [ 30.515392] The buggy address belongs to the physical page: [ 30.515812] page:0000000009118e1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcab [ 30.516499] memcg:ffff88800dca5101 [ 30.516771] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.517241] page_type: 0xffffffff() [ 30.517590] raw: 0100000000000200 ffff8880087a0c80 ffffea00005770c0 dead000000000004 [ 30.518331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dca5101 [ 30.519042] page dumped because: kasan: bad access detected [ 30.519608] [ 30.519794] Memory state around the buggy address: [ 30.520283] ffff88800dcab100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.521031] ffff88800dcab180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.521742] >ffff88800dcab200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.522464] ^ [ 30.522956] ffff88800dcab280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.523669] ffff88800dcab300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.524400] ================================================================== [ 30.525684] Disabling lock debugging due to kernel taint [ 36.180412] BUG: Bad rss-counter state mm:0000000038229bb3 type:MM_FILEPAGES val:33 [ 36.181074] BUG: Bad rss-counter state mm:0000000038229bb3 type:MM_ANONPAGES val:22 [ 37.495802] BUG: Bad rss-counter state mm:000000005cb9bf67 type:MM_FILEPAGES val:33 [ 37.496470] BUG: Bad rss-counter state mm:000000005cb9bf67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31877' (ECDSA) to the list of known hosts. 2023/06/21 10:26:30 fuzzer started 2023/06/21 10:26:30 dialing manager at localhost:36067 2023/06/21 10:26:30 checking machine... 2023/06/21 10:26:30 checking revisions... [ 38.395915] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:26:30 testing simple program... [ 38.435849] cgroup: Unknown subsys name 'net' [ 38.475457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:26:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008c04000 RCX=1ffff110011b9824 RDX=ffff888008dcc100 RSI=ffffffff813ae2f2 RDI=ffff888008dcc120 RBP=0000000000000000 RSP=ffff88806ce099a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000001 R12=ffff888008c04010 R13=0000000000000000 R14=00000000fffbfd4d R15=ffff888008dcc080 RIP=ffffffff81268ab9 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 00007f82727a1900 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=00007fb8d8b2a328 CR3=000000000f5ba000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88807ffd7010 RCX=ffffffff811432bc RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000007 RBP=000000000f0d77a0 RSP=ffff88806cf09d78 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6a61 R12=0000000000000000 R13=ffffea000000000f R14=0000000000000002 R15=ffff88801a3ca408 RIP=ffffffff814c0243 RFL=00000202 [-------] 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=00007f9312635000 CR3=000000001a3d2000 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=756e696c2d34365f3638782f62696c2f XMM01=7470797263356b62696c2f756e672d78 XMM02=00332e6f732e6f7470797263356b6269 XMM03=6c2f756e672d78756e696c2d34365f36 XMM04=00000000000000000000000000000000 XMM05=00007f9312b32f6000007f9312915f30 XMM06=00007f9312915a2000007f9312915510 XMM07=00007f931291500000007f9312b33a20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000