syzkaller login: [ 37.598969] BUG: Bad rss-counter state mm:0000000095449dbd type:MM_FILEPAGES val:33 [ 37.600736] BUG: Bad rss-counter state mm:0000000095449dbd type:MM_ANONPAGES val:22 [ 37.731293] ================================================================== [ 37.732401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.733560] Read of size 8 at addr ffff88800da7c968 by task sshd/218 [ 37.734597] [ 37.734931] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.736005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.737233] Call Trace: [ 37.737630] [ 37.737862] dump_stack_lvl+0x91/0xf0 [ 37.738234] print_report+0xcc/0x620 [ 37.738614] ? __virt_addr_valid+0x102/0x340 [ 37.739036] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.739506] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.739971] kasan_report+0xbe/0xf0 [ 37.740329] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.740803] vma_interval_tree_remove+0xc75/0xec0 [ 37.741260] vma_prepare+0xc54/0x11a0 [ 37.741624] __split_vma+0x5af/0x950 [ 37.741983] ? __pfx___split_vma+0x10/0x10 [ 37.742392] ? find_held_lock+0x2c/0x110 [ 37.742787] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.743217] ? lock_is_held_type+0x9f/0x120 [ 37.743628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.744088] ? mtree_range_walk+0x632/0x900 [ 37.744506] ? mas_walk+0x5c7/0x7c0 [ 37.744868] do_vmi_munmap+0x1f1/0x2b0 [ 37.745242] mmap_region+0x1f9/0x2660 [ 37.745612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.746006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.746557] ? __pfx_lock_acquire+0x10/0x10 [ 37.746964] ? __pfx_mmap_region+0x10/0x10 [ 37.747366] ? security_mmap_addr+0x7d/0xa0 [ 37.747773] ? get_unmapped_area+0x1f5/0x3f0 [ 37.748209] do_mmap+0x854/0xf00 [ 37.748561] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.748966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.749394] ksys_mmap_pgoff+0x3af/0x500 [ 37.749787] do_syscall_64+0x3f/0x90 [ 37.750148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.750649] RIP: 0033:0x7f6f9a2d0d82 [ 37.750995] 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 [ 37.752608] RSP: 002b:00007ffcbe1feed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.753297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f9a2d0d82 [ 37.753939] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f9970a000 [ 37.754596] RBP: 00007f6f9970a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.755239] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f03443bec0 [ 37.755881] R13: 00007ffcbe1feef0 R14: 00007ffcbe1fef20 R15: 00007ffcbe1ff280 [ 37.756528] [ 37.756753] [ 37.756918] Allocated by task 211: [ 37.757242] kasan_save_stack+0x22/0x50 [ 37.757623] kasan_set_track+0x25/0x30 [ 37.758005] __kasan_slab_alloc+0x59/0x70 [ 37.758411] kmem_cache_alloc+0x16b/0x370 [ 37.758802] vm_area_dup+0x20/0x160 [ 37.759143] __split_vma+0x170/0x950 [ 37.759495] split_vma+0xc6/0x110 [ 37.759829] mprotect_fixup+0x8d2/0xb30 [ 37.760210] do_mprotect_pkey+0x87e/0xd40 [ 37.760604] __x64_sys_mprotect+0x78/0xc0 [ 37.761001] do_syscall_64+0x3f/0x90 [ 37.761357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.761842] [ 37.762008] Freed by task 202: [ 37.762306] kasan_save_stack+0x22/0x50 [ 37.762688] kasan_set_track+0x25/0x30 [ 37.763066] kasan_save_free_info+0x2b/0x50 [ 37.763466] __kasan_slab_free+0x10a/0x190 [ 37.763875] kmem_cache_free+0x10d/0x4d0 [ 37.764260] rcu_core+0x8c8/0x2860 [ 37.764598] __do_softirq+0x1b7/0x7d4 [ 37.764961] [ 37.765124] Last potentially related work creation: [ 37.765567] kasan_save_stack+0x22/0x50 [ 37.765954] __kasan_record_aux_stack+0x8e/0xa0 [ 37.766391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.766883] remove_vma+0x139/0x170 [ 37.767224] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.767644] do_vmi_munmap+0x1f1/0x2b0 [ 37.768009] __vm_munmap+0x138/0x3a0 [ 37.768359] __x64_sys_munmap+0x59/0x80 [ 37.768737] do_syscall_64+0x3f/0x90 [ 37.769096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.769607] [ 37.769782] The buggy address belongs to the object at ffff88800da7c910 [ 37.769782] which belongs to the cache vm_area_struct of size 168 [ 37.770938] The buggy address is located 88 bytes inside of [ 37.770938] freed 168-byte region [ffff88800da7c910, ffff88800da7c9b8) [ 37.772010] [ 37.772173] The buggy address belongs to the physical page: [ 37.772677] page:0000000047407f03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda7c [ 37.773501] memcg:ffff888015f5d201 [ 37.773827] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.774316] page_type: 0xffffffff() [ 37.774661] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.775352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f5d201 [ 37.776019] page dumped because: kasan: bad access detected [ 37.776591] [ 37.776750] Memory state around the buggy address: [ 37.777183] ffff88800da7c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.777803] ffff88800da7c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.778454] >ffff88800da7c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.779080] ^ [ 37.779651] ffff88800da7c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.780277] ffff88800da7ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.780909] ================================================================== [ 37.781693] Disabling lock debugging due to kernel taint [ 39.684707] BUG: Bad rss-counter state mm:00000000fccb338b type:MM_FILEPAGES val:33 [ 39.685728] BUG: Bad rss-counter state mm:00000000fccb338b type:MM_ANONPAGES val:22 [ 40.171694] BUG: Bad rss-counter state mm:0000000076aaf488 type:MM_FILEPAGES val:33 [ 40.172978] BUG: Bad rss-counter state mm:0000000076aaf488 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14173' (ECDSA) to the list of known hosts. 2023/06/20 10:35:49 fuzzer started 2023/06/20 10:35:49 dialing manager at localhost:44161 2023/06/20 10:35:49 checking machine... 2023/06/20 10:35:49 checking revisions... [ 40.895732] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:35:49 testing simple program... [ 40.944249] cgroup: Unknown subsys name 'net' [ 41.017030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:35:47 Registers: info registers vcpu 0 RAX=ffff888014797120 RBX=ffff888014792068 RCX=1ffff110028f6f44 RDX=dffffc0000000000 RSI=ffff8880147a5000 RDI=ffff888014792098 RBP=ffff8880147b79f0 RSP=ffff8880179474b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880147a4000 R13=0000000000000000 R14=ffff88801a1d8768 R15=ffff88801a1d8720 RIP=ffffffff81847508 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 00007f78ec4b1900 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=00007f78eca68618 CR3=0000000017960000 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=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=00007ff3c68c3040 CR3=000000001456a000 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=f251eafad944ce8224453b744f5aef99 XMM02=ec2efd57dc4c00df000000000011da98 XMM03=1ebcfd0377d33a79000000000011db68 XMM04=8911d67db35ede5e00000000000ae988 XMM05=751b9502027dc0b90000000000133d88 XMM06=8e9beb6721a01b6a0000000000132f60 XMM07=e042d86d42eb936e0000000000124780 XMM08=1ebcfd0377d33a79000000000011db68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000