syzkaller login: [ 32.686576] BUG: Bad rss-counter state mm:0000000028cf1f25 type:MM_FILEPAGES val:33 [ 32.687767] BUG: Bad rss-counter state mm:0000000028cf1f25 type:MM_ANONPAGES val:22 [ 32.833134] ================================================================== [ 32.834255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.835329] Read of size 8 at addr ffff888018262880 by task sshd/220 [ 32.836195] [ 32.836421] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.837283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.838310] Call Trace: [ 32.838629] [ 32.838922] dump_stack_lvl+0x91/0xf0 [ 32.839415] print_report+0xcc/0x620 [ 32.839902] ? __virt_addr_valid+0x102/0x340 [ 32.840457] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.841070] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.841693] kasan_report+0xbe/0xf0 [ 32.842196] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.842821] vma_interval_tree_remove+0xc75/0xec0 [ 32.843428] vma_prepare+0xc54/0x11a0 [ 32.843906] __split_vma+0x5af/0x950 [ 32.844379] ? __pfx___split_vma+0x10/0x10 [ 32.844906] ? find_held_lock+0x2c/0x110 [ 32.845428] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.845999] ? lock_is_held_type+0x9f/0x120 [ 32.846582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.847191] ? mtree_range_walk+0x632/0x900 [ 32.847737] ? mas_walk+0x5c7/0x7c0 [ 32.848215] do_vmi_munmap+0x1f1/0x2b0 [ 32.848711] mmap_region+0x1f9/0x2660 [ 32.849197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.849714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.850446] ? __pfx_lock_acquire+0x10/0x10 [ 32.850975] ? __pfx_mmap_region+0x10/0x10 [ 32.851508] ? security_mmap_addr+0x7d/0xa0 [ 32.852041] ? get_unmapped_area+0x1f5/0x3f0 [ 32.852591] do_mmap+0x854/0xf00 [ 32.853026] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.853521] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.854098] ksys_mmap_pgoff+0x3af/0x500 [ 32.854620] do_syscall_64+0x3f/0x90 [ 32.855097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.855740] RIP: 0033:0x7fa33643bd82 [ 32.856203] 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 [ 32.858356] RSP: 002b:00007ffe82817f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.859272] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa33643bd82 [ 32.860123] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa335875000 [ 32.860972] RBP: 00007fa335875000 R08: 0000000000000009 R09: 0000000000001000 [ 32.861817] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dcf3ac4ec0 [ 32.862696] R13: 00007ffe82817f80 R14: 00007ffe82817fb0 R15: 00007ffe82818310 [ 32.863555] [ 32.863846] [ 32.864061] Allocated by task 213: [ 32.864501] kasan_save_stack+0x22/0x50 [ 32.865010] kasan_set_track+0x25/0x30 [ 32.865504] __kasan_slab_alloc+0x59/0x70 [ 32.866027] kmem_cache_alloc+0x16b/0x370 [ 32.866582] vm_area_dup+0x20/0x160 [ 32.867037] __split_vma+0x170/0x950 [ 32.867509] split_vma+0xc6/0x110 [ 32.867943] mprotect_fixup+0x8d2/0xb30 [ 32.868449] do_mprotect_pkey+0x87e/0xd40 [ 32.868964] __x64_sys_mprotect+0x78/0xc0 [ 32.869487] do_syscall_64+0x3f/0x90 [ 32.869956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.870619] [ 32.870837] Freed by task 213: [ 32.871226] kasan_save_stack+0x22/0x50 [ 32.871727] kasan_set_track+0x25/0x30 [ 32.872216] kasan_save_free_info+0x2b/0x50 [ 32.872745] __kasan_slab_free+0x10a/0x190 [ 32.873277] kmem_cache_free+0x10d/0x4d0 [ 32.873783] rcu_core+0x8c8/0x2860 [ 32.874261] __do_softirq+0x1b7/0x7d4 [ 32.874737] [ 32.874951] Last potentially related work creation: [ 32.875528] kasan_save_stack+0x22/0x50 [ 32.876039] __kasan_record_aux_stack+0x8e/0xa0 [ 32.876611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.877250] remove_vma+0x139/0x170 [ 32.877708] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.878297] do_vmi_munmap+0x1f1/0x2b0 [ 32.878778] __vm_munmap+0x138/0x3a0 [ 32.879239] __x64_sys_munmap+0x59/0x80 [ 32.879734] do_syscall_64+0x3f/0x90 [ 32.880202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.880843] [ 32.881058] The buggy address belongs to the object at ffff888018262828 [ 32.881058] which belongs to the cache vm_area_struct of size 168 [ 32.882556] The buggy address is located 88 bytes inside of [ 32.882556] freed 168-byte region [ffff888018262828, ffff8880182628d0) [ 32.883956] [ 32.884173] The buggy address belongs to the physical page: [ 32.884830] page:00000000cafba576 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18262 [ 32.885912] memcg:ffff888016733201 [ 32.886371] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.887016] page_type: 0xffffffff() [ 32.887471] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.888381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016733201 [ 32.889294] page dumped because: kasan: bad access detected [ 32.889949] [ 32.890198] Memory state around the buggy address: [ 32.890786] ffff888018262780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.891637] ffff888018262800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.892486] >ffff888018262880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.893340] ^ [ 32.893749] ffff888018262900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.894612] ffff888018262980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.895461] ================================================================== [ 32.896420] Disabling lock debugging due to kernel taint [ 35.245574] BUG: Bad rss-counter state mm:000000000bc5bf1a type:MM_FILEPAGES val:33 [ 35.246867] BUG: Bad rss-counter state mm:000000000bc5bf1a type:MM_ANONPAGES val:22 [ 35.704107] BUG: Bad rss-counter state mm:00000000d4695ea2 type:MM_FILEPAGES val:33 [ 35.705289] BUG: Bad rss-counter state mm:00000000d4695ea2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5693' (ECDSA) to the list of known hosts. 2023/06/19 12:40:46 fuzzer started 2023/06/19 12:40:46 dialing manager at localhost:44161 2023/06/19 12:40:46 checking machine... 2023/06/19 12:40:46 checking revisions... [ 36.350859] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:40:46 testing simple program... [ 36.392310] cgroup: Unknown subsys name 'net' [ 36.458757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:40:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff818d5ef4 RDX=ffff888010210000 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff88800d63f710 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=3830306234386136 R12=0000000000000210 R13=0000000000000200 R14=ffffffff87f31d38 R15=ffffffff87f31d38 RIP=ffffffff814c0388 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 00007f93c0294900 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=00007f93bf6e8b20 CR3=000000000cc76000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2a8785306fc747b000000000000ae988 XMM05=9b11510a268ebe4c0000000000135000 XMM06=4fda316b135da52b00000000001340a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83ab4217 RDX=ffff888015963680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fe7f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a1600000a16 R12=0000000000000000 R13=0000000000000078 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07eb 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 00007f503853c900 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=00007f5038af3618 CR3=000000001a326000 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=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