syzkaller login: [ 31.189571] BUG: Bad rss-counter state mm:00000000358f14dd type:MM_FILEPAGES val:33 [ 31.191300] BUG: Bad rss-counter state mm:00000000358f14dd type:MM_ANONPAGES val:22 [ 31.363129] ================================================================== [ 31.364042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.365005] Read of size 8 at addr ffff888019092228 by task sshd/219 [ 31.365794] [ 31.366017] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.366998] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.368000] Call Trace: [ 31.368353] [ 31.368638] dump_stack_lvl+0x91/0xf0 [ 31.369143] print_report+0xcc/0x620 [ 31.369645] ? __virt_addr_valid+0x102/0x340 [ 31.370212] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370842] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.371476] kasan_report+0xbe/0xf0 [ 31.371956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.372588] vma_interval_tree_remove+0xc75/0xec0 [ 31.373192] vma_prepare+0xc54/0x11a0 [ 31.373673] __split_vma+0x5af/0x950 [ 31.374145] ? __pfx___split_vma+0x10/0x10 [ 31.374671] ? find_held_lock+0x2c/0x110 [ 31.375192] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.375754] ? lock_is_held_type+0x9f/0x120 [ 31.376290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.376903] ? mtree_range_walk+0x632/0x900 [ 31.377454] ? mas_walk+0x5c7/0x7c0 [ 31.377928] do_vmi_munmap+0x1f1/0x2b0 [ 31.378419] mmap_region+0x1f9/0x2660 [ 31.378901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.379407] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.380121] ? __pfx_lock_acquire+0x10/0x10 [ 31.380664] ? __pfx_mmap_region+0x10/0x10 [ 31.381193] ? security_mmap_addr+0x7d/0xa0 [ 31.381723] ? get_unmapped_area+0x1f5/0x3f0 [ 31.382268] do_mmap+0x854/0xf00 [ 31.382706] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.383197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.383762] ksys_mmap_pgoff+0x3af/0x500 [ 31.384265] do_syscall_64+0x3f/0x90 [ 31.384757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.385407] RIP: 0033:0x7ff745dd2d82 [ 31.385860] 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 [ 31.387984] RSP: 002b:00007fff43a609e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.388894] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff745dd2d82 [ 31.389769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff74520c000 [ 31.390619] RBP: 00007ff74520c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.391472] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d0aaaeec0 [ 31.392346] R13: 00007fff43a60a00 R14: 00007fff43a60a30 R15: 00007fff43a60d90 [ 31.393218] [ 31.393514] [ 31.393732] Allocated by task 212: [ 31.394164] kasan_save_stack+0x22/0x50 [ 31.394676] kasan_set_track+0x25/0x30 [ 31.395175] __kasan_slab_alloc+0x59/0x70 [ 31.395711] kmem_cache_alloc+0x16b/0x370 [ 31.396236] vm_area_dup+0x20/0x160 [ 31.396708] __split_vma+0x170/0x950 [ 31.397178] split_vma+0xc6/0x110 [ 31.397623] mprotect_fixup+0x8d2/0xb30 [ 31.398129] do_mprotect_pkey+0x87e/0xd40 [ 31.398660] __x64_sys_mprotect+0x78/0xc0 [ 31.399187] do_syscall_64+0x3f/0x90 [ 31.399667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.400329] [ 31.400548] Freed by task 19: [ 31.400938] kasan_save_stack+0x22/0x50 [ 31.401450] kasan_set_track+0x25/0x30 [ 31.401951] kasan_save_free_info+0x2b/0x50 [ 31.402502] __kasan_slab_free+0x10a/0x190 [ 31.403046] kmem_cache_free+0x10d/0x4d0 [ 31.403561] rcu_core+0x8c8/0x2860 [ 31.404011] __do_softirq+0x1b7/0x7d4 [ 31.404512] [ 31.404731] Last potentially related work creation: [ 31.405327] kasan_save_stack+0x22/0x50 [ 31.405839] __kasan_record_aux_stack+0x8e/0xa0 [ 31.406414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.407056] remove_vma+0x139/0x170 [ 31.407511] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.408075] do_vmi_munmap+0x1f1/0x2b0 [ 31.408687] __vm_munmap+0x138/0x3a0 [ 31.409155] __x64_sys_munmap+0x59/0x80 [ 31.409651] do_syscall_64+0x3f/0x90 [ 31.410126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410767] [ 31.410981] The buggy address belongs to the object at ffff8880190921d0 [ 31.410981] which belongs to the cache vm_area_struct of size 168 [ 31.412458] The buggy address is located 88 bytes inside of [ 31.412458] freed 168-byte region [ffff8880190921d0, ffff888019092278) [ 31.413858] [ 31.414075] The buggy address belongs to the physical page: [ 31.414743] page:000000004c69e460 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19092 [ 31.415847] memcg:ffff88800dfff001 [ 31.416284] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.416956] page_type: 0xffffffff() [ 31.417408] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.418329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfff001 [ 31.419240] page dumped because: kasan: bad access detected [ 31.419912] [ 31.420132] Memory state around the buggy address: [ 31.420717] ffff888019092100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.421594] ffff888019092180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.422469] >ffff888019092200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.423351] ^ [ 31.423926] ffff888019092280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.424854] ffff888019092300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.425720] ================================================================== [ 31.426656] Disabling lock debugging due to kernel taint [ 33.907729] BUG: Bad rss-counter state mm:0000000052a8b5d9 type:MM_FILEPAGES val:33 [ 33.908789] BUG: Bad rss-counter state mm:0000000052a8b5d9 type:MM_ANONPAGES val:22 [ 34.397775] BUG: Bad rss-counter state mm:00000000026b58ff type:MM_FILEPAGES val:33 [ 34.398765] BUG: Bad rss-counter state mm:00000000026b58ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46733' (ECDSA) to the list of known hosts. 2023/06/20 10:53:16 fuzzer started 2023/06/20 10:53:16 dialing manager at localhost:36067 2023/06/20 10:53:16 checking machine... 2023/06/20 10:53:16 checking revisions... [ 35.104175] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:53:16 testing simple program... [ 35.156546] cgroup: Unknown subsys name 'net' [ 35.230390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:53:15 Registers: info registers vcpu 0 RAX=ffffffff81808258 RBX=ffffffff85dfdb20 RCX=ffffffff818083e7 RDX=0000000000000000 RSI=ffffffff86138712 RDI=ffffffff85dfdb20 RBP=ffffffff85dfdb24 RSP=ffff88800f3ef150 R8 =ffffffff86138712 R9 =ffff88800f3ef248 R10=0000000000038001 R11=0000000000020c57 R12=ffffffff85dfdb20 R13=ffffffff85dfdb20 R14=ffffffff85dfdb20 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000212 [----A--] 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 00007f2772319900 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=00007f27728d0618 CR3=000000001039a000 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=ffff888008e08001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e07e01 RSI=ffff888008e07e78 RDI=ffff888008e07e78 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff864b381e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e07e80 R15=ffff88806cf09a98 RIP=ffffffff8112fbf0 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=00007f60f7d13a20 CR3=0000000010002000 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=2035313a33353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a33353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000