syzkaller login: [ 125.443221] BUG: Bad rss-counter state mm:00000000ac048dec type:MM_FILEPAGES val:33 [ 125.444036] BUG: Bad rss-counter state mm:00000000ac048dec type:MM_ANONPAGES val:22 [ 125.615877] ================================================================== [ 125.617044] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 125.618053] Read of size 8 at addr ffff88800ee15880 by task sshd/220 [ 125.618996] [ 125.619216] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 125.620252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 125.621256] Call Trace: [ 125.621586] [ 125.621869] dump_stack_lvl+0x91/0xf0 [ 125.622394] print_report+0xcc/0x620 [ 125.622881] ? __virt_addr_valid+0x102/0x340 [ 125.623445] ? vma_interval_tree_remove+0xc75/0xec0 [ 125.624082] ? vma_interval_tree_remove+0xc75/0xec0 [ 125.624733] kasan_report+0xbe/0xf0 [ 125.625223] ? vma_interval_tree_remove+0xc75/0xec0 [ 125.625844] vma_interval_tree_remove+0xc75/0xec0 [ 125.626461] vma_prepare+0xc54/0x11a0 [ 125.626958] __split_vma+0x5af/0x950 [ 125.627446] ? __pfx___split_vma+0x10/0x10 [ 125.627990] ? find_held_lock+0x2c/0x110 [ 125.628535] do_vmi_align_munmap+0x2ba/0x11f0 [ 125.629110] ? lock_is_held_type+0x9f/0x120 [ 125.629652] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 125.630276] ? mtree_range_walk+0x632/0x900 [ 125.630832] ? mas_walk+0x5c7/0x7c0 [ 125.631322] do_vmi_munmap+0x1f1/0x2b0 [ 125.631815] mmap_region+0x1f9/0x2660 [ 125.632345] ? vm_mmap_pgoff+0x15c/0x3a0 [ 125.632870] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 125.633601] ? __pfx_lock_acquire+0x10/0x10 [ 125.634156] ? __pfx_mmap_region+0x10/0x10 [ 125.634688] ? security_mmap_addr+0x7d/0xa0 [ 125.635233] ? get_unmapped_area+0x1f5/0x3f0 [ 125.635785] do_mmap+0x854/0xf00 [ 125.636251] vm_mmap_pgoff+0x1a6/0x3a0 [ 125.636771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 125.637344] ksys_mmap_pgoff+0x3af/0x500 [ 125.637854] do_syscall_64+0x3f/0x90 [ 125.638344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 125.639008] RIP: 0033:0x7fb4786b9d82 [ 125.639478] 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 [ 125.641664] RSP: 002b:00007ffe1a026628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 125.642594] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4786b9d82 [ 125.643459] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb477af3000 [ 125.644356] RBP: 00007fb477af3000 R08: 0000000000000009 R09: 0000000000001000 [ 125.645230] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ae062eec0 [ 125.646091] R13: 00007ffe1a026640 R14: 00007ffe1a026670 R15: 00007ffe1a0269d0 [ 125.646964] [ 125.647258] [ 125.647476] Allocated by task 213: [ 125.647914] kasan_save_stack+0x22/0x50 [ 125.648461] kasan_set_track+0x25/0x30 [ 125.648976] __kasan_slab_alloc+0x59/0x70 [ 125.649508] kmem_cache_alloc+0x16b/0x370 [ 125.650042] vm_area_dup+0x20/0x160 [ 125.650497] __split_vma+0x170/0x950 [ 125.650979] split_vma+0xc6/0x110 [ 125.651426] mprotect_fixup+0x8d2/0xb30 [ 125.651945] do_mprotect_pkey+0x87e/0xd40 [ 125.652488] __x64_sys_mprotect+0x78/0xc0 [ 125.653040] do_syscall_64+0x3f/0x90 [ 125.653523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 125.654181] [ 125.654397] Freed by task 202: [ 125.654800] kasan_save_stack+0x22/0x50 [ 125.655321] kasan_set_track+0x25/0x30 [ 125.655816] kasan_save_free_info+0x2b/0x50 [ 125.656376] __kasan_slab_free+0x10a/0x190 [ 125.656915] kmem_cache_free+0x10d/0x4d0 [ 125.657453] rcu_core+0x8c8/0x2860 [ 125.657906] __do_softirq+0x1b7/0x7d4 [ 125.658393] [ 125.658608] Last potentially related work creation: [ 125.659208] kasan_save_stack+0x22/0x50 [ 125.659713] __kasan_record_aux_stack+0x8e/0xa0 [ 125.660397] __call_rcu_common.constprop.0+0x6a/0xb90 [ 125.661136] remove_vma+0x139/0x170 [ 125.661755] do_vmi_align_munmap+0xd4a/0x11f0 [ 125.662496] do_vmi_munmap+0x1f1/0x2b0 [ 125.663143] __vm_munmap+0x138/0x3a0 [ 125.663758] __x64_sys_munmap+0x59/0x80 [ 125.664423] do_syscall_64+0x3f/0x90 [ 125.665044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 125.665844] [ 125.666119] The buggy address belongs to the object at ffff88800ee15828 [ 125.666119] which belongs to the cache vm_area_struct of size 168 [ 125.667598] The buggy address is located 88 bytes inside of [ 125.667598] freed 168-byte region [ffff88800ee15828, ffff88800ee158d0) [ 125.669084] [ 125.669303] The buggy address belongs to the physical page: [ 125.669983] page:0000000081992fdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee15 [ 125.671090] memcg:ffff8880068ded01 [ 125.671519] flags: 0x100000000000200(slab|node=0|zone=1) [ 125.672188] page_type: 0xffffffff() [ 125.672657] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 125.673614] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880068ded01 [ 125.674540] page dumped because: kasan: bad access detected [ 125.675216] [ 125.675432] Memory state around the buggy address: [ 125.676025] ffff88800ee15780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 125.676898] ffff88800ee15800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 125.677787] >ffff88800ee15880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 125.678661] ^ [ 125.679089] ffff88800ee15900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 125.679956] ffff88800ee15980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 125.680829] ================================================================== [ 125.681788] Disabling lock debugging due to kernel taint [ 128.582953] BUG: Bad rss-counter state mm:000000008dcb5625 type:MM_FILEPAGES val:33 [ 128.584270] BUG: Bad rss-counter state mm:000000008dcb5625 type:MM_ANONPAGES val:22 [ 129.037695] BUG: Bad rss-counter state mm:0000000076b9bbc6 type:MM_FILEPAGES val:33 [ 129.038915] BUG: Bad rss-counter state mm:0000000076b9bbc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13914' (ECDSA) to the list of known hosts. 2023/06/19 21:48:11 fuzzer started 2023/06/19 21:48:12 dialing manager at localhost:44161 2023/06/19 21:48:12 checking machine... 2023/06/19 21:48:12 checking revisions... [ 129.813672] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:48:12 testing simple program... [ 129.873948] cgroup: Unknown subsys name 'net' [ 129.938242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:46:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff036bf598 CR3=0000000005482000 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=00007fed57b70510000056057443c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000100 RCX=0000000000000000 RDX=ffff888015b50000 RSI=ffffffff816500e9 RDI=0000000000000004 RBP=0000000000000021 RSP=ffff888016d2fa78 R8 =0000000000000004 R9 =0000000000000021 R10=0000000000000100 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fe5f000 R15=000000000000007b RIP=ffffffff816500e9 RFL=00000293 [--S-A-C] 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 00007f980523d700 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=00007f4e855e1520 CR3=000000000d4ce000 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=2031313a38343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a38343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000