syzkaller login: [ 30.672549] BUG: Bad rss-counter state mm:000000003a49b634 type:MM_FILEPAGES val:33 [ 30.673621] BUG: Bad rss-counter state mm:000000003a49b634 type:MM_ANONPAGES val:22 [ 30.840385] ================================================================== [ 30.841508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.842655] Read of size 8 at addr ffff88800e307b38 by task sshd/221 [ 30.843585] [ 30.843809] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.844697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.845721] Call Trace: [ 30.846051] [ 30.846348] dump_stack_lvl+0x91/0xf0 [ 30.846847] print_report+0xcc/0x620 [ 30.847348] ? __virt_addr_valid+0x102/0x340 [ 30.847914] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848558] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849183] kasan_report+0xbe/0xf0 [ 30.849670] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850312] vma_interval_tree_remove+0xc75/0xec0 [ 30.850923] vma_prepare+0xc54/0x11a0 [ 30.851424] __split_vma+0x5af/0x950 [ 30.851897] ? __pfx___split_vma+0x10/0x10 [ 30.852466] ? find_held_lock+0x2c/0x110 [ 30.852993] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.853563] ? lock_is_held_type+0x9f/0x120 [ 30.854107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.854726] ? mtree_range_walk+0x632/0x900 [ 30.855288] ? mas_walk+0x5c7/0x7c0 [ 30.855767] do_vmi_munmap+0x1f1/0x2b0 [ 30.856276] mmap_region+0x1f9/0x2660 [ 30.856760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.857275] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.858032] ? __pfx_lock_acquire+0x10/0x10 [ 30.858569] ? __pfx_mmap_region+0x10/0x10 [ 30.859113] ? security_mmap_addr+0x7d/0xa0 [ 30.859651] ? get_unmapped_area+0x1f5/0x3f0 [ 30.860222] do_mmap+0x854/0xf00 [ 30.860666] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.861173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.861744] ksys_mmap_pgoff+0x3af/0x500 [ 30.862269] do_syscall_64+0x3f/0x90 [ 30.862766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863422] RIP: 0033:0x7f70f46b8d82 [ 30.863883] 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 [ 30.866045] RSP: 002b:00007ffd5ad40e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.866973] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70f46b8d82 [ 30.867836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70f3af2000 [ 30.868707] RBP: 00007f70f3af2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.869564] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a68ffbb20 [ 30.870427] R13: 00007ffd5ad40e30 R14: 00007ffd5ad40e60 R15: 00007ffd5ad411c0 [ 30.871293] [ 30.871596] [ 30.871816] Allocated by task 214: [ 30.872256] kasan_save_stack+0x22/0x50 [ 30.872775] kasan_set_track+0x25/0x30 [ 30.873282] __kasan_slab_alloc+0x59/0x70 [ 30.873812] kmem_cache_alloc+0x16b/0x370 [ 30.874331] vm_area_dup+0x20/0x160 [ 30.874790] __split_vma+0x170/0x950 [ 30.875272] split_vma+0xc6/0x110 [ 30.875712] mprotect_fixup+0x8d2/0xb30 [ 30.876244] do_mprotect_pkey+0x87e/0xd40 [ 30.876770] __x64_sys_mprotect+0x78/0xc0 [ 30.877301] do_syscall_64+0x3f/0x90 [ 30.877775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.878433] [ 30.878652] Freed by task 211: [ 30.879046] kasan_save_stack+0x22/0x50 [ 30.879557] kasan_set_track+0x25/0x30 [ 30.880072] kasan_save_free_info+0x2b/0x50 [ 30.880613] __kasan_slab_free+0x10a/0x190 [ 30.881155] kmem_cache_free+0x10d/0x4d0 [ 30.881671] rcu_core+0x8c8/0x2860 [ 30.882115] __do_softirq+0x1b7/0x7d4 [ 30.882597] [ 30.882812] Last potentially related work creation: [ 30.883417] kasan_save_stack+0x22/0x50 [ 30.883930] __kasan_record_aux_stack+0x8e/0xa0 [ 30.884532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.885184] remove_vma+0x139/0x170 [ 30.885642] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.886216] do_vmi_munmap+0x1f1/0x2b0 [ 30.886721] __vm_munmap+0x138/0x3a0 [ 30.887198] __x64_sys_munmap+0x59/0x80 [ 30.887700] do_syscall_64+0x3f/0x90 [ 30.888196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888852] [ 30.889067] The buggy address belongs to the object at ffff88800e307ae0 [ 30.889067] which belongs to the cache vm_area_struct of size 168 [ 30.890563] The buggy address is located 88 bytes inside of [ 30.890563] freed 168-byte region [ffff88800e307ae0, ffff88800e307b88) [ 30.892004] [ 30.892226] The buggy address belongs to the physical page: [ 30.892908] page:0000000082156cf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe307 [ 30.894009] memcg:ffff888009038d01 [ 30.894446] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.895154] page_type: 0xffffffff() [ 30.895615] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 30.896569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009038d01 [ 30.897505] page dumped because: kasan: bad access detected [ 30.898176] [ 30.898400] Memory state around the buggy address: [ 30.898996] ffff88800e307a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.899868] ffff88800e307a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.900748] >ffff88800e307b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.901607] ^ [ 30.902226] ffff88800e307b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.903094] ffff88800e307c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.903978] ================================================================== [ 30.904982] Disabling lock debugging due to kernel taint [ 33.198542] BUG: Bad rss-counter state mm:0000000073cc2a2d type:MM_FILEPAGES val:33 [ 33.199724] BUG: Bad rss-counter state mm:0000000073cc2a2d type:MM_ANONPAGES val:22 [ 33.648596] BUG: Bad rss-counter state mm:000000004839e84b type:MM_FILEPAGES val:33 [ 33.649633] BUG: Bad rss-counter state mm:000000004839e84b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35401' (ECDSA) to the list of known hosts. 2023/06/20 20:27:53 fuzzer started 2023/06/20 20:27:53 dialing manager at localhost:36067 2023/06/20 20:27:53 checking machine... 2023/06/20 20:27:53 checking revisions... [ 34.302624] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:27:53 testing simple program... [ 34.356885] cgroup: Unknown subsys name 'net' [ 34.403954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:27:52 Registers: info registers vcpu 0 RAX=0000563d28f52180 RBX=0000000000000006 RCX=0000000000000000 RDX=0000563d28f51ee0 RSI=0000563d28f44e00 RDI=0000563d28f4acf0 RBP=0000563d27670908 RSP=00007f56999cea80 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000563d28f44e00 R13=0000563d2768f004 R14=0000000000000000 R15=0000563d28f44e30 RIP=0000563d27648391 RFL=00000202 [-------] 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 00007f56999cf700 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=00007f5096a1b618 CR3=000000000dcee000 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=2032353a37323a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37323a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8614c0e1 RBX=0000000000000001 RCX=ffffffff8614c0e0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801456f428 RSP=ffff88801456f360 R8 =ffffffff8614c0e4 R9 =ffff88801456f410 R10=0000000000038001 R11=00000000000240a4 R12=ffff88801456f430 R13=ffff88801456f418 R14=ffff88801456f6c8 R15=ffff88801456f3d0 RIP=ffffffff81130b8f 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 00007f1ceeecb900 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=00007f1cee3280b0 CR3=000000000f110000 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=f3ce7707784a9cdd00000000000ae988 XMM05=ffd8c9bea9fbdfcc0000000000132720 XMM06=c291bd5c70af25b90000000000131510 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000