syzkaller login: [ 29.640718] BUG: Bad rss-counter state mm:00000000dc229a8f type:MM_FILEPAGES val:33 [ 29.642049] BUG: Bad rss-counter state mm:00000000dc229a8f type:MM_ANONPAGES val:22 [ 29.685077] ================================================================== [ 29.686585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.688210] Read of size 8 at addr ffff88800e79a5c8 by task sshd/220 [ 29.689420] [ 29.689687] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.690843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.692196] Call Trace: [ 29.692694] [ 29.693087] dump_stack_lvl+0x91/0xf0 [ 29.693685] print_report+0xcc/0x620 [ 29.694263] ? __virt_addr_valid+0x102/0x340 [ 29.694930] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.695667] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.696404] kasan_report+0xbe/0xf0 [ 29.696991] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.697733] vma_interval_tree_remove+0xc75/0xec0 [ 29.698464] vma_prepare+0xc54/0x11a0 [ 29.699048] __split_vma+0x5af/0x950 [ 29.699617] ? __pfx___split_vma+0x10/0x10 [ 29.700255] ? find_held_lock+0x2c/0x110 [ 29.700871] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.701574] ? lock_is_held_type+0x9f/0x120 [ 29.702226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.702959] ? mtree_range_walk+0x632/0x900 [ 29.703620] ? mas_walk+0x5c7/0x7c0 [ 29.704198] do_vmi_munmap+0x1f1/0x2b0 [ 29.704791] mmap_region+0x1f9/0x2660 [ 29.705394] ? selinux_mmap_addr+0x1f/0x110 [ 29.706047] ? __pfx_mmap_region+0x10/0x10 [ 29.706697] ? security_mmap_addr+0x7d/0xa0 [ 29.707330] ? get_unmapped_area+0x1f5/0x3f0 [ 29.707985] do_mmap+0x854/0xf00 [ 29.708516] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.709128] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.709801] ksys_mmap_pgoff+0x3af/0x500 [ 29.710424] do_syscall_64+0x3f/0x90 [ 29.710999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.711782] RIP: 0033:0x7ff20efd0d82 [ 29.712328] 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 [ 29.714919] RSP: 002b:00007fff20599e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.716033] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff20efd0d82 [ 29.717073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff20e40a000 [ 29.718106] RBP: 00007ff20e40a000 R08: 0000000000000009 R09: 0000000000001000 [ 29.719142] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7d2e70ec0 [ 29.720172] R13: 00007fff20599e40 R14: 00007fff20599e70 R15: 00007fff2059a1d0 [ 29.721239] [ 29.721592] [ 29.721849] Allocated by task 213: [ 29.722374] kasan_save_stack+0x22/0x50 [ 29.722983] kasan_set_track+0x25/0x30 [ 29.723578] __kasan_slab_alloc+0x59/0x70 [ 29.724213] kmem_cache_alloc+0x16b/0x370 [ 29.724835] vm_area_dup+0x20/0x160 [ 29.725394] __split_vma+0x170/0x950 [ 29.725964] split_vma+0xc6/0x110 [ 29.726580] mprotect_fixup+0x8d2/0xb30 [ 29.727181] do_mprotect_pkey+0x87e/0xd40 [ 29.727809] __x64_sys_mprotect+0x78/0xc0 [ 29.728445] do_syscall_64+0x3f/0x90 [ 29.729038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.729825] [ 29.730080] Freed by task 213: [ 29.730564] kasan_save_stack+0x22/0x50 [ 29.731178] kasan_set_track+0x25/0x30 [ 29.731773] kasan_save_free_info+0x2b/0x50 [ 29.732415] __kasan_slab_free+0x10a/0x190 [ 29.733064] kmem_cache_free+0x10d/0x4d0 [ 29.733677] rcu_core+0x8c8/0x2860 [ 29.734215] __do_softirq+0x1b7/0x7d4 [ 29.734787] [ 29.735054] Last potentially related work creation: [ 29.735765] kasan_save_stack+0x22/0x50 [ 29.736371] __kasan_record_aux_stack+0x8e/0xa0 [ 29.737068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.737678] remove_vma+0x139/0x170 [ 29.738111] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.738643] do_vmi_munmap+0x1f1/0x2b0 [ 29.739104] __vm_munmap+0x138/0x3a0 [ 29.739545] __x64_sys_munmap+0x59/0x80 [ 29.740015] do_syscall_64+0x3f/0x90 [ 29.740462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.741080] [ 29.741286] Second to last potentially related work creation: [ 29.741972] kasan_save_stack+0x22/0x50 [ 29.742471] __kasan_record_aux_stack+0x8e/0xa0 [ 29.743045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.743677] remove_vma+0x139/0x170 [ 29.744130] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.744690] do_vmi_munmap+0x1f1/0x2b0 [ 29.745182] mmap_region+0x1f9/0x2660 [ 29.745660] do_mmap+0x854/0xf00 [ 29.746087] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.746576] ksys_mmap_pgoff+0x3af/0x500 [ 29.747072] do_syscall_64+0x3f/0x90 [ 29.747548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.748184] [ 29.748393] The buggy address belongs to the object at ffff88800e79a570 [ 29.748393] which belongs to the cache vm_area_struct of size 168 [ 29.749851] The buggy address is located 88 bytes inside of [ 29.749851] freed 168-byte region [ffff88800e79a570, ffff88800e79a618) [ 29.751257] [ 29.751467] The buggy address belongs to the physical page: [ 29.752110] page:0000000060e0e681 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe79a [ 29.753179] memcg:ffff88800e645801 [ 29.753598] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.754236] page_type: 0xffffffff() [ 29.754687] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 29.755594] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e645801 [ 29.756485] page dumped because: kasan: bad access detected [ 29.757143] [ 29.757356] Memory state around the buggy address: [ 29.757935] ffff88800e79a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.758782] ffff88800e79a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.759628] >ffff88800e79a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.760471] ^ [ 29.761152] ffff88800e79a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.761996] ffff88800e79a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.762834] ================================================================== [ 29.763802] Disabling lock debugging due to kernel taint [ 32.161305] BUG: Bad rss-counter state mm:00000000ca560a43 type:MM_FILEPAGES val:33 [ 32.162473] BUG: Bad rss-counter state mm:00000000ca560a43 type:MM_ANONPAGES val:22 [ 32.697685] BUG: Bad rss-counter state mm:0000000065711e14 type:MM_FILEPAGES val:33 [ 32.698838] BUG: Bad rss-counter state mm:0000000065711e14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64561' (ECDSA) to the list of known hosts. 2023/06/20 03:46:00 fuzzer started 2023/06/20 03:46:00 dialing manager at localhost:44161 2023/06/20 03:46:00 checking machine... 2023/06/20 03:46:00 checking revisions... [ 33.329960] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:46:01 testing simple program... [ 33.375169] cgroup: Unknown subsys name 'net' [ 33.439721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f7e523705d0 CR3=00000000136a0000 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=94f67e34cdb9b79cd1497de6aeaecd05 XMM02=000000000011c490ec2efd57dc4c00df XMM03=00000000001231a85e4a12b52db1c090 XMM04=470f93f32b93aa9c00000000000ae988 XMM05=239996361f4b0f570000000000134980 XMM06=c291bd5c70af25b90000000000134378 XMM07=e042d86d42eb936e0000000000123428 XMM08=5e4a12b52db1c090000000000011c4f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100379fc85 RBX=ffff88801bcfe3f8 RCX=1ffff1100379eb1e RDX=dffffc0000000000 RSI=ffff8880193c10c0 RDI=ffff88801bcfe428 RBP=ffff88801bcf58c0 RSP=ffff888018f8fcd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880193c0b80 R13=0000000000000000 R14=ffff88800fcbe508 R15=ffff88800fcbe4c0 RIP=ffffffff818474fe 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 00007f318e481900 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=00007fff86ff1000 CR3=0000000009718000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000