syzkaller login: [ 31.035938] BUG: Bad rss-counter state mm:000000001d63109e type:MM_FILEPAGES val:33 [ 31.037022] BUG: Bad rss-counter state mm:000000001d63109e type:MM_ANONPAGES val:22 [ 31.072540] ================================================================== [ 31.073630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.074700] Read of size 8 at addr ffff888019f313f8 by task sshd/221 [ 31.075505] [ 31.075738] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.076653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.077680] Call Trace: [ 31.078019] [ 31.078323] dump_stack_lvl+0x91/0xf0 [ 31.078846] print_report+0xcc/0x620 [ 31.079370] ? __virt_addr_valid+0x102/0x340 [ 31.079981] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080683] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081356] kasan_report+0xbe/0xf0 [ 31.081881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082568] vma_interval_tree_remove+0xc75/0xec0 [ 31.083236] vma_prepare+0xc54/0x11a0 [ 31.083852] __split_vma+0x5af/0x950 [ 31.084380] ? __pfx___split_vma+0x10/0x10 [ 31.084982] ? find_held_lock+0x2c/0x110 [ 31.085561] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.086202] ? lock_is_held_type+0x9f/0x120 [ 31.086816] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.087516] ? mtree_range_walk+0x632/0x900 [ 31.088150] ? mas_walk+0x5c7/0x7c0 [ 31.088680] do_vmi_munmap+0x1f1/0x2b0 [ 31.089192] mmap_region+0x1f9/0x2660 [ 31.089699] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.090225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.090969] ? __pfx_lock_acquire+0x10/0x10 [ 31.091521] ? __pfx_mmap_region+0x10/0x10 [ 31.092072] ? security_mmap_addr+0x7d/0xa0 [ 31.092635] ? get_unmapped_area+0x1f5/0x3f0 [ 31.093198] do_mmap+0x854/0xf00 [ 31.093652] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.094162] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.094754] ksys_mmap_pgoff+0x3af/0x500 [ 31.095278] do_syscall_64+0x3f/0x90 [ 31.095774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096461] RIP: 0033:0x7fe9ddd7fd82 [ 31.096932] 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 [ 31.099132] RSP: 002b:00007ffcb1a8bef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.100081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9ddd7fd82 [ 31.100976] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9dd1b9000 [ 31.101864] RBP: 00007fe9dd1b9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.102747] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc1132fb20 [ 31.103623] R13: 00007ffcb1a8bf10 R14: 00007ffcb1a8bf40 R15: 00007ffcb1a8c2a0 [ 31.104526] [ 31.104826] [ 31.105052] Allocated by task 214: [ 31.105492] kasan_save_stack+0x22/0x50 [ 31.106011] kasan_set_track+0x25/0x30 [ 31.106523] __kasan_slab_alloc+0x59/0x70 [ 31.107064] kmem_cache_alloc+0x16b/0x370 [ 31.107601] vm_area_dup+0x20/0x160 [ 31.108087] __split_vma+0x170/0x950 [ 31.108587] split_vma+0xc6/0x110 [ 31.109039] mprotect_fixup+0x8d2/0xb30 [ 31.109558] do_mprotect_pkey+0x87e/0xd40 [ 31.110096] __x64_sys_mprotect+0x78/0xc0 [ 31.110630] do_syscall_64+0x3f/0x90 [ 31.111123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.111793] [ 31.112018] Freed by task 214: [ 31.112426] kasan_save_stack+0x22/0x50 [ 31.112962] kasan_set_track+0x25/0x30 [ 31.113469] kasan_save_free_info+0x2b/0x50 [ 31.114020] __kasan_slab_free+0x10a/0x190 [ 31.114569] kmem_cache_free+0x10d/0x4d0 [ 31.115095] rcu_core+0x8c8/0x2860 [ 31.115550] __do_softirq+0x1b7/0x7d4 [ 31.116046] [ 31.116270] Last potentially related work creation: [ 31.116888] kasan_save_stack+0x22/0x50 [ 31.117414] __kasan_record_aux_stack+0x8e/0xa0 [ 31.118007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.118680] remove_vma+0x139/0x170 [ 31.119151] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.119720] do_vmi_munmap+0x1f1/0x2b0 [ 31.120220] __vm_munmap+0x138/0x3a0 [ 31.120712] __x64_sys_munmap+0x59/0x80 [ 31.121224] do_syscall_64+0x3f/0x90 [ 31.121718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122385] [ 31.122610] The buggy address belongs to the object at ffff888019f313a0 [ 31.122610] which belongs to the cache vm_area_struct of size 168 [ 31.124141] The buggy address is located 88 bytes inside of [ 31.124141] freed 168-byte region [ffff888019f313a0, ffff888019f31448) [ 31.125624] [ 31.125842] The buggy address belongs to the physical page: [ 31.126528] page:00000000e88a8acb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f31 [ 31.127658] memcg:ffff888016b38b01 [ 31.128100] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.128775] page_type: 0xffffffff() [ 31.129246] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.130196] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b38b01 [ 31.131129] page dumped because: kasan: bad access detected [ 31.131817] [ 31.132037] Memory state around the buggy address: [ 31.132654] ffff888019f31280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.133536] ffff888019f31300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.134423] >ffff888019f31380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.135300] ^ [ 31.136176] ffff888019f31400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.137100] ffff888019f31480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.137989] ================================================================== [ 31.139222] Disabling lock debugging due to kernel taint [ 33.683211] BUG: Bad rss-counter state mm:000000006282973c type:MM_FILEPAGES val:33 [ 33.684334] BUG: Bad rss-counter state mm:000000006282973c type:MM_ANONPAGES val:22 [ 34.246450] BUG: Bad rss-counter state mm:000000004de7d630 type:MM_FILEPAGES val:33 [ 34.247610] BUG: Bad rss-counter state mm:000000004de7d630 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9038' (ECDSA) to the list of known hosts. 2023/06/20 14:32:25 fuzzer started 2023/06/20 14:32:25 dialing manager at localhost:36067 2023/06/20 14:32:25 checking machine... 2023/06/20 14:32:25 checking revisions... [ 34.914814] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:32:25 testing simple program... [ 34.967301] cgroup: Unknown subsys name 'net' [ 35.005959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:32:25 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015cffbb0 RCX=1ffff11002b9ff2c RDX=ffff888015dd1b40 RSI=ffffffff8369a0a2 RDI=0000000000000005 RBP=ffff88800fb51000 RSP=ffff888015cff9f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f9ab500 R13=ffff88800fb511b8 R14=0000000000000042 R15=0000000000000042 RIP=ffffffff814c086b RFL=00000286 [--S--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 00007f0510d00900 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=00007ffe6677d000 CR3=0000000009c96000 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=6720646572637465733a4d41503d706f 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1c3d019a30 CR3=000000000c600000 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=2034323a32333a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a32333a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000