syzkaller login: [ 30.656230] BUG: Bad rss-counter state mm:00000000836e5c2a type:MM_FILEPAGES val:33 [ 30.658031] BUG: Bad rss-counter state mm:00000000836e5c2a type:MM_ANONPAGES val:22 [ 30.822729] ================================================================== [ 30.823658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.824625] Read of size 8 at addr ffff8880197b3228 by task sshd/220 [ 30.825386] [ 30.825721] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827603] Call Trace: [ 30.827953] [ 30.828270] dump_stack_lvl+0x91/0xf0 [ 30.828774] print_report+0xcc/0x620 [ 30.829259] ? __virt_addr_valid+0x102/0x340 [ 30.829888] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830676] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831451] kasan_report+0xbe/0xf0 [ 30.832055] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832870] vma_interval_tree_remove+0xc75/0xec0 [ 30.833643] vma_prepare+0xc54/0x11a0 [ 30.834258] __split_vma+0x5af/0x950 [ 30.834854] ? __pfx___split_vma+0x10/0x10 [ 30.835534] ? find_held_lock+0x2c/0x110 [ 30.836213] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.836946] ? lock_is_held_type+0x9f/0x120 [ 30.837645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.838430] ? mtree_range_walk+0x632/0x900 [ 30.839137] ? mas_walk+0x5c7/0x7c0 [ 30.839765] do_vmi_munmap+0x1f1/0x2b0 [ 30.840426] mmap_region+0x1f9/0x2660 [ 30.841051] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.841709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.842620] ? __pfx_lock_acquire+0x10/0x10 [ 30.843305] ? __pfx_mmap_region+0x10/0x10 [ 30.843985] ? security_mmap_addr+0x7d/0xa0 [ 30.844678] ? get_unmapped_area+0x1f5/0x3f0 [ 30.845387] do_mmap+0x854/0xf00 [ 30.845957] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.846591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.847317] ksys_mmap_pgoff+0x3af/0x500 [ 30.847973] do_syscall_64+0x3f/0x90 [ 30.848619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849457] RIP: 0033:0x7f9360621d82 [ 30.850047] 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 [ 30.852677] RSP: 002b:00007ffd478bb418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.853607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9360621d82 [ 30.854454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f935fa5b000 [ 30.855293] RBP: 00007f935fa5b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.856137] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c785ecb20 [ 30.856974] R13: 00007ffd478bb430 R14: 00007ffd478bb460 R15: 00007ffd478bb7c0 [ 30.857829] [ 30.858121] [ 30.858337] Allocated by task 213: [ 30.858763] kasan_save_stack+0x22/0x50 [ 30.859269] kasan_set_track+0x25/0x30 [ 30.859757] __kasan_slab_alloc+0x59/0x70 [ 30.860296] kmem_cache_alloc+0x16b/0x370 [ 30.860810] vm_area_dup+0x20/0x160 [ 30.861264] __split_vma+0x170/0x950 [ 30.861730] split_vma+0xc6/0x110 [ 30.862167] mprotect_fixup+0x8d2/0xb30 [ 30.862672] do_mprotect_pkey+0x87e/0xd40 [ 30.863191] __x64_sys_mprotect+0x78/0xc0 [ 30.863709] do_syscall_64+0x3f/0x90 [ 30.864196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.864842] [ 30.865063] Freed by task 213: [ 30.865461] kasan_save_stack+0x22/0x50 [ 30.865970] kasan_set_track+0x25/0x30 [ 30.866472] kasan_save_free_info+0x2b/0x50 [ 30.867019] __kasan_slab_free+0x10a/0x190 [ 30.867574] kmem_cache_free+0x10d/0x4d0 [ 30.868085] rcu_core+0x8c8/0x2860 [ 30.868556] __do_softirq+0x1b7/0x7d4 [ 30.869035] [ 30.869248] Last potentially related work creation: [ 30.869847] kasan_save_stack+0x22/0x50 [ 30.870355] __kasan_record_aux_stack+0x8e/0xa0 [ 30.870934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.871589] remove_vma+0x139/0x170 [ 30.872047] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.872620] do_vmi_munmap+0x1f1/0x2b0 [ 30.873111] __vm_munmap+0x138/0x3a0 [ 30.873586] __x64_sys_munmap+0x59/0x80 [ 30.874091] do_syscall_64+0x3f/0x90 [ 30.874568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875228] [ 30.875447] The buggy address belongs to the object at ffff8880197b31d0 [ 30.875447] which belongs to the cache vm_area_struct of size 168 [ 30.876940] The buggy address is located 88 bytes inside of [ 30.876940] freed 168-byte region [ffff8880197b31d0, ffff8880197b3278) [ 30.878369] [ 30.878589] The buggy address belongs to the physical page: [ 30.879259] page:0000000002d41af1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197b3 [ 30.880378] memcg:ffff888013ec3801 [ 30.880809] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.881485] page_type: 0xffffffff() [ 30.881912] raw: 0100000000000200 ffff8880087a0c80 ffffea0000270b40 dead000000000005 [ 30.882782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ec3801 [ 30.883646] page dumped because: kasan: bad access detected [ 30.884292] [ 30.884496] Memory state around the buggy address: [ 30.885042] ffff8880197b3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885851] ffff8880197b3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.886659] >ffff8880197b3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.887470] ^ [ 30.888001] ffff8880197b3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.888829] ffff8880197b3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.889636] ================================================================== [ 30.890601] Disabling lock debugging due to kernel taint [ 32.827285] BUG: Bad rss-counter state mm:00000000d42d90cb type:MM_FILEPAGES val:33 [ 32.828559] BUG: Bad rss-counter state mm:00000000d42d90cb type:MM_ANONPAGES val:22 [ 33.224400] BUG: Bad rss-counter state mm:00000000f6c21b5a type:MM_FILEPAGES val:33 [ 33.225460] BUG: Bad rss-counter state mm:00000000f6c21b5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20868' (ECDSA) to the list of known hosts. 2023/06/20 12:45:35 fuzzer started 2023/06/20 12:45:36 dialing manager at localhost:36067 2023/06/20 12:45:36 checking machine... 2023/06/20 12:45:36 checking revisions... [ 33.950156] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:45:36 testing simple program... [ 33.994400] cgroup: Unknown subsys name 'net' [ 34.045271] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860d8256 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ad6 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 00007fb8db741700 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=00007f9fc5ed7f30 CR3=000000000e9a8000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035333a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100273d65f RBX=ffff8880139eb2c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880139eb2f8 RBP=ffff888013a1d800 RSP=ffff888008e37cb8 R8 =0000000000000001 R9 =ffffed10011c6f8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888013a56c00 R14=ffffffff813782f8 R15=ffff888013a56c00 RIP=ffffffff818464e2 RFL=00000046 [---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 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=00007ffc99b29000 CR3=000000000d6e4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000