syzkaller login: [ 28.727851] BUG: Bad rss-counter state mm:00000000906baf70 type:MM_FILEPAGES val:33 [ 28.729196] BUG: Bad rss-counter state mm:00000000906baf70 type:MM_ANONPAGES val:22 [ 28.878149] ================================================================== [ 28.879067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.880027] Read of size 8 at addr ffff88800d637df0 by task sshd/218 [ 28.880894] [ 28.881119] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.881992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.883007] Call Trace: [ 28.883335] [ 28.883645] dump_stack_lvl+0x91/0xf0 [ 28.884142] print_report+0xcc/0x620 [ 28.884627] ? __virt_addr_valid+0x102/0x340 [ 28.885173] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885795] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886418] kasan_report+0xbe/0xf0 [ 28.886908] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887533] vma_interval_tree_remove+0xc75/0xec0 [ 28.888162] vma_prepare+0xc54/0x11a0 [ 28.888640] __split_vma+0x5af/0x950 [ 28.889118] ? __pfx___split_vma+0x10/0x10 [ 28.889648] ? find_held_lock+0x2c/0x110 [ 28.890173] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.890739] ? lock_is_held_type+0x9f/0x120 [ 28.891282] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.891897] ? mtree_range_walk+0x632/0x900 [ 28.892456] ? mas_walk+0x5c7/0x7c0 [ 28.892935] do_vmi_munmap+0x1f1/0x2b0 [ 28.893438] mmap_region+0x1f9/0x2660 [ 28.893921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.894437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.895157] ? __pfx_lock_acquire+0x10/0x10 [ 28.895704] ? __pfx_mmap_region+0x10/0x10 [ 28.896235] ? security_mmap_addr+0x7d/0xa0 [ 28.896769] ? get_unmapped_area+0x1f5/0x3f0 [ 28.897318] do_mmap+0x854/0xf00 [ 28.897756] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.898253] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.898815] ksys_mmap_pgoff+0x3af/0x500 [ 28.899322] do_syscall_64+0x3f/0x90 [ 28.899808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.900462] RIP: 0033:0x7f7850d15d82 [ 28.900921] 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 [ 28.903022] RSP: 002b:00007ffec12264e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.903947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7850d15d82 [ 28.904788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f785014f000 [ 28.905629] RBP: 00007f785014f000 R08: 0000000000000009 R09: 0000000000001000 [ 28.906467] R10: 0000000000000812 R11: 0000000000000206 R12: 000056383fa49ec0 [ 28.907313] R13: 00007ffec1226500 R14: 00007ffec1226530 R15: 00007ffec1226890 [ 28.908167] [ 28.908461] [ 28.908680] Allocated by task 211: [ 28.909108] kasan_save_stack+0x22/0x50 [ 28.909610] kasan_set_track+0x25/0x30 [ 28.910107] __kasan_slab_alloc+0x59/0x70 [ 28.910632] kmem_cache_alloc+0x16b/0x370 [ 28.911144] vm_area_dup+0x20/0x160 [ 28.911596] __split_vma+0x170/0x950 [ 28.912086] split_vma+0xc6/0x110 [ 28.912527] mprotect_fixup+0x8d2/0xb30 [ 28.913026] do_mprotect_pkey+0x87e/0xd40 [ 28.913545] __x64_sys_mprotect+0x78/0xc0 [ 28.914063] do_syscall_64+0x3f/0x90 [ 28.914539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915185] [ 28.915400] Freed by task 211: [ 28.915806] kasan_save_stack+0x22/0x50 [ 28.916306] kasan_set_track+0x25/0x30 [ 28.916802] kasan_save_free_info+0x2b/0x50 [ 28.917341] __kasan_slab_free+0x10a/0x190 [ 28.917875] kmem_cache_free+0x10d/0x4d0 [ 28.918381] rcu_core+0x8c8/0x2860 [ 28.918824] __do_softirq+0x1b7/0x7d4 [ 28.919299] [ 28.919515] Last potentially related work creation: [ 28.920118] kasan_save_stack+0x22/0x50 [ 28.920618] __kasan_record_aux_stack+0x8e/0xa0 [ 28.921189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.921824] remove_vma+0x139/0x170 [ 28.922269] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.922825] do_vmi_munmap+0x1f1/0x2b0 [ 28.923310] __vm_munmap+0x138/0x3a0 [ 28.923793] __x64_sys_munmap+0x59/0x80 [ 28.924288] do_syscall_64+0x3f/0x90 [ 28.924757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.925393] [ 28.925608] The buggy address belongs to the object at ffff88800d637d98 [ 28.925608] which belongs to the cache vm_area_struct of size 168 [ 28.927085] The buggy address is located 88 bytes inside of [ 28.927085] freed 168-byte region [ffff88800d637d98, ffff88800d637e40) [ 28.928485] [ 28.928701] The buggy address belongs to the physical page: [ 28.929356] page:000000008c4d16fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd637 [ 28.930432] memcg:ffff88800e3ba501 [ 28.930859] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.931496] page_type: 0xffffffff() [ 28.931961] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bb180 dead000000000008 [ 28.932874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ba501 [ 28.933776] page dumped because: kasan: bad access detected [ 28.934438] [ 28.934654] Memory state around the buggy address: [ 28.935232] ffff88800d637c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.936085] ffff88800d637d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.936929] >ffff88800d637d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.937776] ^ [ 28.938581] ffff88800d637e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.939432] ffff88800d637e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.940299] ================================================================== [ 28.941253] Disabling lock debugging due to kernel taint [ 31.098056] BUG: Bad rss-counter state mm:000000008a9a077d type:MM_FILEPAGES val:33 [ 31.099246] BUG: Bad rss-counter state mm:000000008a9a077d type:MM_ANONPAGES val:22 [ 31.478210] BUG: Bad rss-counter state mm:0000000005bc9a0e type:MM_FILEPAGES val:33 [ 31.479421] BUG: Bad rss-counter state mm:0000000005bc9a0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46212' (ECDSA) to the list of known hosts. 2023/06/20 17:08:14 fuzzer started 2023/06/20 17:08:14 dialing manager at localhost:36067 2023/06/20 17:08:14 checking machine... 2023/06/20 17:08:14 checking revisions... [ 32.159832] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:08:14 testing simple program... [ 32.213407] cgroup: Unknown subsys name 'net' [ 32.251736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:14 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff82168bed RDX=ffff88801024d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=00007ffd27e964d0 RSP=ffff88800fb7fb20 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=0000000000000000 R15=ffff88800fb7fe70 RIP=ffffffff814c086b 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 00007f5d8b66b900 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=00007f5d8bc22618 CR3=000000000ec72000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f55adac6d20 CR3=000000000c986000 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=586382920ede81b3674d7e5e99f0abd9 XMM02=000000000011b868eff9b2d0a8fce9cb XMM03=000000000011b9382c67c8bc2e329bc3 XMM04=972ed711eb05c49c00000000000ae988 XMM05=519f8f90885ec02b0000000000132ea8 XMM06=806171799158d96700000000001322d0 XMM07=e042d86d42eb936e0000000000122110 XMM08=58ffd2dbbac1fcee000000000011b938 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000