syzkaller login: [ 33.897312] BUG: Bad rss-counter state mm:0000000067ce5afd type:MM_FILEPAGES val:33 [ 33.898354] BUG: Bad rss-counter state mm:0000000067ce5afd type:MM_ANONPAGES val:22 [ 34.055430] ================================================================== [ 34.056475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.057421] Read of size 8 at addr ffff88800e776c20 by task sshd/220 [ 34.058299] [ 34.058517] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.059387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.060393] Call Trace: [ 34.060711] [ 34.060996] dump_stack_lvl+0x91/0xf0 [ 34.061492] print_report+0xcc/0x620 [ 34.061978] ? __virt_addr_valid+0x102/0x340 [ 34.062529] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.063156] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.063800] kasan_report+0xbe/0xf0 [ 34.064268] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.064890] vma_interval_tree_remove+0xc75/0xec0 [ 34.065495] vma_prepare+0xc54/0x11a0 [ 34.065972] __split_vma+0x5af/0x950 [ 34.066440] ? __pfx___split_vma+0x10/0x10 [ 34.066967] ? find_held_lock+0x2c/0x110 [ 34.067499] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.068093] ? lock_is_held_type+0x9f/0x120 [ 34.068632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.069234] ? mtree_range_walk+0x632/0x900 [ 34.069781] ? mas_walk+0x5c7/0x7c0 [ 34.070258] do_vmi_munmap+0x1f1/0x2b0 [ 34.070747] mmap_region+0x1f9/0x2660 [ 34.071226] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.071742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.072453] ? __pfx_lock_acquire+0x10/0x10 [ 34.072988] ? __pfx_mmap_region+0x10/0x10 [ 34.073514] ? security_mmap_addr+0x7d/0xa0 [ 34.074041] ? get_unmapped_area+0x1f5/0x3f0 [ 34.074586] do_mmap+0x854/0xf00 [ 34.075024] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.075513] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.076089] ksys_mmap_pgoff+0x3af/0x500 [ 34.076601] do_syscall_64+0x3f/0x90 [ 34.077077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.077716] RIP: 0033:0x7f2ae6ec6d82 [ 34.078177] 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 [ 34.080327] RSP: 002b:00007ffdbb5e34a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.081229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ae6ec6d82 [ 34.082074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ae6300000 [ 34.082912] RBP: 00007f2ae6300000 R08: 0000000000000009 R09: 0000000000001000 [ 34.083774] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eaca1ebec0 [ 34.084638] R13: 00007ffdbb5e34c0 R14: 00007ffdbb5e34f0 R15: 00007ffdbb5e3850 [ 34.085496] [ 34.085791] [ 34.086004] Allocated by task 213: [ 34.086432] kasan_save_stack+0x22/0x50 [ 34.086933] kasan_set_track+0x25/0x30 [ 34.087424] __kasan_slab_alloc+0x59/0x70 [ 34.087957] kmem_cache_alloc+0x16b/0x370 [ 34.088471] vm_area_dup+0x20/0x160 [ 34.088920] __split_vma+0x170/0x950 [ 34.089385] split_vma+0xc6/0x110 [ 34.089823] mprotect_fixup+0x8d2/0xb30 [ 34.090325] do_mprotect_pkey+0x87e/0xd40 [ 34.090844] __x64_sys_mprotect+0x78/0xc0 [ 34.091364] do_syscall_64+0x3f/0x90 [ 34.091856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.092499] [ 34.092719] Freed by task 213: [ 34.093109] kasan_save_stack+0x22/0x50 [ 34.093607] kasan_set_track+0x25/0x30 [ 34.094099] kasan_save_free_info+0x2b/0x50 [ 34.094633] __kasan_slab_free+0x10a/0x190 [ 34.095161] kmem_cache_free+0x10d/0x4d0 [ 34.095680] rcu_core+0x8c8/0x2860 [ 34.096133] __do_softirq+0x1b7/0x7d4 [ 34.096609] [ 34.096823] Last potentially related work creation: [ 34.097411] kasan_save_stack+0x22/0x50 [ 34.097918] __kasan_record_aux_stack+0x8e/0xa0 [ 34.098487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.099125] remove_vma+0x139/0x170 [ 34.099591] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.100151] do_vmi_munmap+0x1f1/0x2b0 [ 34.100635] __vm_munmap+0x138/0x3a0 [ 34.101104] __x64_sys_munmap+0x59/0x80 [ 34.101601] do_syscall_64+0x3f/0x90 [ 34.102069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.102706] [ 34.102919] The buggy address belongs to the object at ffff88800e776bc8 [ 34.102919] which belongs to the cache vm_area_struct of size 168 [ 34.104393] The buggy address is located 88 bytes inside of [ 34.104393] freed 168-byte region [ffff88800e776bc8, ffff88800e776c70) [ 34.105794] [ 34.106008] The buggy address belongs to the physical page: [ 34.106665] page:000000005e4022cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe776 [ 34.107759] memcg:ffff88800eba4b01 [ 34.108187] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.108837] page_type: 0xffffffff() [ 34.109285] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.110200] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eba4b01 [ 34.111109] page dumped because: kasan: bad access detected [ 34.111799] [ 34.112012] Memory state around the buggy address: [ 34.112592] ffff88800e776b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.113449] ffff88800e776b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.114315] >ffff88800e776c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.115157] ^ [ 34.115691] ffff88800e776c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.116547] ffff88800e776d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.117395] ================================================================== [ 34.118697] Disabling lock debugging due to kernel taint [ 36.002336] BUG: Bad rss-counter state mm:000000001f4cc770 type:MM_FILEPAGES val:33 [ 36.003324] BUG: Bad rss-counter state mm:000000001f4cc770 type:MM_ANONPAGES val:22 [ 36.532026] BUG: Bad rss-counter state mm:000000003bcc519f type:MM_FILEPAGES val:33 [ 36.533265] BUG: Bad rss-counter state mm:000000003bcc519f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56259' (ECDSA) to the list of known hosts. 2023/06/19 15:22:42 fuzzer started 2023/06/19 15:22:42 dialing manager at localhost:44161 2023/06/19 15:22:42 checking machine... 2023/06/19 15:22:42 checking revisions... [ 37.178854] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:22:43 testing simple program... [ 37.228577] cgroup: Unknown subsys name 'net' [ 37.271445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:22:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015a21b40 RSI=ffffffff82158763 RDI=00007ffe4982c704 RBP=00007ffe4982c6e0 RSP=ffff88801954f900 R8 =0000000000000000 R9 =ffffed1002b25924 R10=ffff88801592c923 R11=0000000000000000 R12=ffff88801592c900 R13=00007ffe4982c704 R14=0000000000000000 R15=ffff88801954fd90 RIP=ffffffff82158765 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 00007f613a3e8900 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=00007ffe4982b000 CR3=000000000ea94000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f8b887ef040 CR3=000000000da98000 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=25ab223291e6f989f145dc528688fcac XMM02=2c67c8bc2e329bc3000000000011d118 XMM03=fb795ef6d65770560000000000124a60 XMM04=7bcb8f8c930218cc00000000000ae988 XMM05=19e9129bd510f2350000000000134650 XMM06=4fda316b135da52b00000000001344d8 XMM07=e042d86d42eb936e0000000000124ce0 XMM08=7f9f99bce876b481000000000011d178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000