syzkaller login: [ 44.339455] BUG: Bad rss-counter state mm:0000000033dbfc39 type:MM_FILEPAGES val:33 [ 44.340167] BUG: Bad rss-counter state mm:0000000033dbfc39 type:MM_ANONPAGES val:22 [ 44.469242] ================================================================== [ 44.469942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.470637] Read of size 8 at addr ffff888016a93880 by task sshd/220 [ 44.471206] [ 44.471362] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.471974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.472661] Call Trace: [ 44.472886] <TASK> [ 44.473089] dump_stack_lvl+0x91/0xf0 [ 44.473442] print_report+0xcc/0x620 [ 44.473959] ? __virt_addr_valid+0x102/0x340 [ 44.474364] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.474803] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.475282] kasan_report+0xbe/0xf0 [ 44.475627] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.476079] vma_interval_tree_remove+0xc75/0xec0 [ 44.476497] vma_prepare+0xc54/0x11a0 [ 44.476837] __split_vma+0x5af/0x950 [ 44.477182] ? __pfx___split_vma+0x10/0x10 [ 44.477585] ? find_held_lock+0x2c/0x110 [ 44.477958] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.478353] ? lock_is_held_type+0x9f/0x120 [ 44.478738] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.479174] ? mtree_range_walk+0x632/0x900 [ 44.479571] ? mas_walk+0x5c7/0x7c0 [ 44.479918] do_vmi_munmap+0x1f1/0x2b0 [ 44.480277] mmap_region+0x1f9/0x2660 [ 44.480619] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.480983] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.481507] ? __pfx_lock_acquire+0x10/0x10 [ 44.481899] ? __pfx_mmap_region+0x10/0x10 [ 44.482279] ? security_mmap_addr+0x7d/0xa0 [ 44.482655] ? get_unmapped_area+0x1f5/0x3f0 [ 44.483049] do_mmap+0x854/0xf00 [ 44.483369] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.483719] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.484126] ksys_mmap_pgoff+0x3af/0x500 [ 44.484489] do_syscall_64+0x3f/0x90 [ 44.484826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.485288] RIP: 0033:0x7fb33e562d82 [ 44.485665] 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 [ 44.486884] RSP: 002b:00007ffd0ab1d838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.487400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb33e562d82 [ 44.487867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb33d99c000 [ 44.488335] RBP: 00007fb33d99c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.488798] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aae4526ec0 [ 44.489262] R13: 00007ffd0ab1d850 R14: 00007ffd0ab1d880 R15: 00007ffd0ab1dbe0 [ 44.489753] </TASK> [ 44.489914] [ 44.490030] Allocated by task 213: [ 44.490266] kasan_save_stack+0x22/0x50 [ 44.490543] kasan_set_track+0x25/0x30 [ 44.490813] __kasan_slab_alloc+0x59/0x70 [ 44.491137] kmem_cache_alloc+0x16b/0x370 [ 44.491428] vm_area_dup+0x20/0x160 [ 44.491679] __split_vma+0x170/0x950 [ 44.491951] split_vma+0xc6/0x110 [ 44.492205] mprotect_fixup+0x8d2/0xb30 [ 44.492483] do_mprotect_pkey+0x87e/0xd40 [ 44.492773] __x64_sys_mprotect+0x78/0xc0 [ 44.493057] do_syscall_64+0x3f/0x90 [ 44.493312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.493679] [ 44.493798] Freed by task 203: [ 44.494011] kasan_save_stack+0x22/0x50 [ 44.494284] kasan_set_track+0x25/0x30 [ 44.494556] kasan_save_free_info+0x2b/0x50 [ 44.494846] __kasan_slab_free+0x10a/0x190 [ 44.495138] kmem_cache_free+0x10d/0x4d0 [ 44.495415] rcu_core+0x8c8/0x2860 [ 44.495660] __do_softirq+0x1b7/0x7d4 [ 44.495922] [ 44.496041] Last potentially related work creation: [ 44.496361] kasan_save_stack+0x22/0x50 [ 44.496639] __kasan_record_aux_stack+0x8e/0xa0 [ 44.496956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.497352] remove_vma+0x139/0x170 [ 44.497664] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.498079] do_vmi_munmap+0x1f1/0x2b0 [ 44.498420] __vm_munmap+0x138/0x3a0 [ 44.498751] __x64_sys_munmap+0x59/0x80 [ 44.499109] do_syscall_64+0x3f/0x90 [ 44.499440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.499898] [ 44.500053] The buggy address belongs to the object at ffff888016a93828 [ 44.500053] which belongs to the cache vm_area_struct of size 168 [ 44.501087] The buggy address is located 88 bytes inside of [ 44.501087] freed 168-byte region [ffff888016a93828, ffff888016a938d0) [ 44.502107] [ 44.502271] The buggy address belongs to the physical page: [ 44.502742] page:000000005793dacd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a93 [ 44.503531] memcg:ffff88800efb1f01 [ 44.503828] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.504279] page_type: 0xffffffff() [ 44.504601] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.505250] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efb1f01 [ 44.505900] page dumped because: kasan: bad access detected [ 44.506367] [ 44.506519] Memory state around the buggy address: [ 44.506935] ffff888016a93780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 44.507593] ffff888016a93800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 44.508233] >ffff888016a93880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 44.508823] ^ [ 44.509121] ffff888016a93900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.509752] ffff888016a93980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 44.510511] ================================================================== [ 44.511225] Disabling lock debugging due to kernel taint [ 46.119588] BUG: Bad rss-counter state mm:000000005d85ed99 type:MM_FILEPAGES val:33 [ 46.120313] BUG: Bad rss-counter state mm:000000005d85ed99 type:MM_ANONPAGES val:22 [ 46.519995] BUG: Bad rss-counter state mm:0000000038073562 type:MM_FILEPAGES val:33 [ 46.520726] BUG: Bad rss-counter state mm:0000000038073562 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2945' (ECDSA) to the list of known hosts. 2023/06/20 09:07:34 fuzzer started 2023/06/20 09:07:35 dialing manager at localhost:44161 2023/06/20 09:07:35 checking machine... 2023/06/20 09:07:35 checking revisions... [ 47.015553] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:07:35 testing simple program... [ 47.051963] cgroup: Unknown subsys name 'net' [ 47.091318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:07:20 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800dc8c000 RCX=ffffffff83aaeab5 RDX=000000000000006c RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f616000 RSP=ffff8880158873c8 R8 =0000000000000001 R9 =0000000000000000 R10=000000000000006c R11=00000000000b6996 R12=ffff888016ff2a00 R13=00000000ffffffff R14=00000000ffffffff R15=000000000000006c RIP=ffffffff814c01d0 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 00007fcb1cbe2900 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=00007fcb1d199618 CR3=000000001bd62000 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=00007f5ef3083350 CR3=000000000c7a2000 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=8a3da421f783c5bef0435a581f5935f1 XMM02=000000000011d078ec2efd57dc4c00df XMM03=000000000012432015f043ac8a82f023 XMM04=75739ce99759dd7e00000000000ae988 XMM05=e4cb8bb95a7664b600000000001340d0 XMM06=39d36f367ffaad980000000000132f38 XMM07=e042d86d42eb936e00000000001245a0 XMM08=15f043ac8a82f023000000000011d0d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000