syzkaller login: [ 60.520942] BUG: Bad rss-counter state mm:0000000099f9237f type:MM_FILEPAGES val:33 [ 60.522772] BUG: Bad rss-counter state mm:0000000099f9237f type:MM_ANONPAGES val:22 [ 60.688166] ================================================================== [ 60.689270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.690236] Read of size 8 at addr ffff88800a072310 by task sshd/219 [ 60.691183] [ 60.691399] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 60.692414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.693403] Call Trace: [ 60.693728] <TASK> [ 60.694011] dump_stack_lvl+0x91/0xf0 [ 60.694508] print_report+0xcc/0x620 [ 60.694986] ? __virt_addr_valid+0x102/0x340 [ 60.695530] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.696150] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.696758] kasan_report+0xbe/0xf0 [ 60.697238] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.697851] vma_interval_tree_remove+0xc75/0xec0 [ 60.698450] vma_prepare+0xc54/0x11a0 [ 60.698929] __split_vma+0x5af/0x950 [ 60.699402] ? __pfx___split_vma+0x10/0x10 [ 60.699926] ? find_held_lock+0x2c/0x110 [ 60.700443] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.701018] ? lock_is_held_type+0x9f/0x120 [ 60.701635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.702240] ? mtree_range_walk+0x632/0x900 [ 60.702793] ? mas_walk+0x5c7/0x7c0 [ 60.703263] do_vmi_munmap+0x1f1/0x2b0 [ 60.703752] mmap_region+0x1f9/0x2660 [ 60.704225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.704730] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.705445] ? __pfx_lock_acquire+0x10/0x10 [ 60.705978] ? __pfx_mmap_region+0x10/0x10 [ 60.706501] ? security_mmap_addr+0x7d/0xa0 [ 60.707027] ? get_unmapped_area+0x1f5/0x3f0 [ 60.707570] do_mmap+0x854/0xf00 [ 60.708004] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.708493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.709069] ksys_mmap_pgoff+0x3af/0x500 [ 60.709569] do_syscall_64+0x3f/0x90 [ 60.710040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.710677] RIP: 0033:0x7fba7e4cfd82 [ 60.711138] 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 [ 60.713243] RSP: 002b:00007ffcf5ed35b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.714135] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba7e4cfd82 [ 60.714970] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba7d909000 [ 60.715803] RBP: 00007fba7d909000 R08: 0000000000000009 R09: 0000000000001000 [ 60.716642] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c21ca3ec0 [ 60.717501] R13: 00007ffcf5ed35d0 R14: 00007ffcf5ed3600 R15: 00007ffcf5ed3960 [ 60.718349] </TASK> [ 60.718641] [ 60.718854] Allocated by task 212: [ 60.719275] kasan_save_stack+0x22/0x50 [ 60.719770] kasan_set_track+0x25/0x30 [ 60.720261] __kasan_slab_alloc+0x59/0x70 [ 60.720778] kmem_cache_alloc+0x16b/0x370 [ 60.721301] vm_area_dup+0x20/0x160 [ 60.721749] __split_vma+0x170/0x950 [ 60.722211] split_vma+0xc6/0x110 [ 60.722646] mprotect_fixup+0x8d2/0xb30 [ 60.723141] do_mprotect_pkey+0x87e/0xd40 [ 60.723661] __x64_sys_mprotect+0x78/0xc0 [ 60.724184] do_syscall_64+0x3f/0x90 [ 60.724653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.725311] [ 60.725525] Freed by task 210: [ 60.725911] kasan_save_stack+0x22/0x50 [ 60.726407] kasan_set_track+0x25/0x30 [ 60.726895] kasan_save_free_info+0x2b/0x50 [ 60.727420] __kasan_slab_free+0x10a/0x190 [ 60.727953] kmem_cache_free+0x10d/0x4d0 [ 60.728458] rcu_core+0x8c8/0x2860 [ 60.728915] __do_softirq+0x1b7/0x7d4 [ 60.729386] [ 60.729598] Last potentially related work creation: [ 60.730183] kasan_save_stack+0x22/0x50 [ 60.730678] __kasan_record_aux_stack+0x8e/0xa0 [ 60.731249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.731886] remove_vma+0x139/0x170 [ 60.732409] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.732984] do_vmi_munmap+0x1f1/0x2b0 [ 60.733465] __vm_munmap+0x138/0x3a0 [ 60.733929] __x64_sys_munmap+0x59/0x80 [ 60.734418] do_syscall_64+0x3f/0x90 [ 60.734891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.735525] [ 60.735738] The buggy address belongs to the object at ffff88800a0722b8 [ 60.735738] which belongs to the cache vm_area_struct of size 168 [ 60.737195] The buggy address is located 88 bytes inside of [ 60.737195] freed 168-byte region [ffff88800a0722b8, ffff88800a072360) [ 60.738576] [ 60.738792] The buggy address belongs to the physical page: [ 60.739455] page:0000000024c508c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa072 [ 60.740527] memcg:ffff88801abac801 [ 60.740956] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.741595] page_type: 0xffffffff() [ 60.742043] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.742959] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801abac801 [ 60.743856] page dumped because: kasan: bad access detected [ 60.744510] [ 60.744722] Memory state around the buggy address: [ 60.745316] ffff88800a072200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 60.746167] ffff88800a072280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.747011] >ffff88800a072300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.747856] ^ [ 60.748323] ffff88800a072380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.749181] ffff88800a072400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.750025] ================================================================== [ 60.750935] Disabling lock debugging due to kernel taint [ 63.067928] BUG: Bad rss-counter state mm:000000009514c871 type:MM_FILEPAGES val:33 [ 63.068843] BUG: Bad rss-counter state mm:000000009514c871 type:MM_ANONPAGES val:22 [ 63.548835] BUG: Bad rss-counter state mm:000000005e0c2899 type:MM_FILEPAGES val:33 [ 63.549964] BUG: Bad rss-counter state mm:000000005e0c2899 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29171' (ECDSA) to the list of known hosts. 2023/06/19 11:57:47 fuzzer started 2023/06/19 11:57:47 dialing manager at localhost:44161 2023/06/19 11:57:47 checking machine... 2023/06/19 11:57:47 checking revisions... [ 64.283859] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:57:47 testing simple program... [ 64.334628] cgroup: Unknown subsys name 'net' [ 64.383744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:57:10 Registers: info registers vcpu 0 RAX=ffff88800d728001 RBX=ffff88800d727928 RCX=0000000000000001 RDX=ffff88800d727901 RSI=ffff88800d7279c0 RDI=ffff88800d727938 RBP=ffff88800d7279c0 RSP=ffff88800d727830 R8 =0000000000000001 R9 =ffff88800d727968 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88800d720000 R14=ffff88800d7279c0 R15=ffff88800d727928 RIP=ffffffff8113048d 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 00007fefa77bf900 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=00007fefa7d76618 CR3=000000000fd36000 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=0000000000000050 RBX=ffff888009508000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffffffff85a237a0 RSP=ffff88800f3ff788 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed10012a1001 R14=dffffc0000000000 R15=ffff888009508060 RIP=ffffffff821920cf RFL=00000093 [--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 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=000055eaba14b000 CR3=0000000005482000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007efffa394c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=79732036373133343931203535373043 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000