syzkaller login: [ 51.516864] sshd (213) used greatest stack depth: 23992 bytes left [ 51.517519] BUG: Bad rss-counter state mm:000000004370d25e type:MM_FILEPAGES val:33 [ 51.518280] BUG: Bad rss-counter state mm:000000004370d25e type:MM_ANONPAGES val:22 [ 51.643171] ================================================================== [ 51.643924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.644647] Read of size 8 at addr ffff88801a0b6df0 by task sshd/220 [ 51.645266] [ 51.645420] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.646053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.646775] Call Trace: [ 51.647018] [ 51.647524] dump_stack_lvl+0x91/0xf0 [ 51.647892] print_report+0xcc/0x620 [ 51.648266] ? __virt_addr_valid+0x102/0x340 [ 51.648664] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.649122] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.649568] kasan_report+0xbe/0xf0 [ 51.649918] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.650392] vma_interval_tree_remove+0xc75/0xec0 [ 51.650840] vma_prepare+0xc54/0x11a0 [ 51.651187] __split_vma+0x5af/0x950 [ 51.651572] ? __pfx___split_vma+0x10/0x10 [ 51.651960] ? find_held_lock+0x2c/0x110 [ 51.652362] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.652781] ? lock_is_held_type+0x9f/0x120 [ 51.653183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.653632] ? mtree_range_walk+0x632/0x900 [ 51.654039] ? mas_walk+0x5c7/0x7c0 [ 51.654386] do_vmi_munmap+0x1f1/0x2b0 [ 51.654753] mmap_region+0x1f9/0x2660 [ 51.655092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.655525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.656059] ? __pfx_lock_acquire+0x10/0x10 [ 51.656565] ? __pfx_mmap_region+0x10/0x10 [ 51.656933] ? security_mmap_addr+0x7d/0xa0 [ 51.657310] ? get_unmapped_area+0x1f5/0x3f0 [ 51.657706] do_mmap+0x854/0xf00 [ 51.658019] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.658372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.658776] ksys_mmap_pgoff+0x3af/0x500 [ 51.659142] do_syscall_64+0x3f/0x90 [ 51.659519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.659981] RIP: 0033:0x7fe00df9ad82 [ 51.660309] 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 [ 51.661814] RSP: 002b:00007ffc4006a318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.662455] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe00df9ad82 [ 51.663045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe00d3d4000 [ 51.663677] RBP: 00007fe00d3d4000 R08: 0000000000000009 R09: 0000000000001000 [ 51.664291] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f728f8df70 [ 51.664902] R13: 00007ffc4006a330 R14: 00007ffc4006a360 R15: 00007ffc4006a6c0 [ 51.665515] [ 51.665726] [ 51.665884] Allocated by task 213: [ 51.666188] kasan_save_stack+0x22/0x50 [ 51.666554] kasan_set_track+0x25/0x30 [ 51.666909] __kasan_slab_alloc+0x59/0x70 [ 51.667280] kmem_cache_alloc+0x16b/0x370 [ 51.667664] vm_area_dup+0x20/0x160 [ 51.667983] __split_vma+0x170/0x950 [ 51.668310] split_vma+0xc6/0x110 [ 51.668622] mprotect_fixup+0x8d2/0xb30 [ 51.668980] do_mprotect_pkey+0x87e/0xd40 [ 51.669349] __x64_sys_mprotect+0x78/0xc0 [ 51.669721] do_syscall_64+0x3f/0x90 [ 51.670058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.670515] [ 51.670668] Freed by task 204: [ 51.670950] kasan_save_stack+0x22/0x50 [ 51.671313] kasan_set_track+0x25/0x30 [ 51.671689] kasan_save_free_info+0x2b/0x50 [ 51.672066] __kasan_slab_free+0x10a/0x190 [ 51.672442] kmem_cache_free+0x10d/0x4d0 [ 51.672819] rcu_core+0x8c8/0x2860 [ 51.673140] __do_softirq+0x1b7/0x7d4 [ 51.673479] [ 51.673626] Last potentially related work creation: [ 51.674038] kasan_save_stack+0x22/0x50 [ 51.674398] __kasan_record_aux_stack+0x8e/0xa0 [ 51.674808] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.675260] remove_vma+0x139/0x170 [ 51.675591] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.675983] do_vmi_munmap+0x1f1/0x2b0 [ 51.676331] __vm_munmap+0x138/0x3a0 [ 51.676662] __x64_sys_munmap+0x59/0x80 [ 51.677012] do_syscall_64+0x3f/0x90 [ 51.677345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.677805] [ 51.677961] The buggy address belongs to the object at ffff88801a0b6d98 [ 51.677961] which belongs to the cache vm_area_struct of size 168 [ 51.679023] The buggy address is located 88 bytes inside of [ 51.679023] freed 168-byte region [ffff88801a0b6d98, ffff88801a0b6e40) [ 51.680064] [ 51.680220] The buggy address belongs to the physical page: [ 51.680683] page:00000000dbc29bdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0b6 [ 51.681476] memcg:ffff888019c3fe01 [ 51.681772] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.682235] page_type: 0xffffffff() [ 51.682558] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.683235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c3fe01 [ 51.683901] page dumped because: kasan: bad access detected [ 51.684363] [ 51.684520] Memory state around the buggy address: [ 51.684940] ffff88801a0b6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 51.685551] ffff88801a0b6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 51.686148] >ffff88801a0b6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 51.686765] ^ [ 51.687346] ffff88801a0b6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 51.687962] ffff88801a0b6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.688688] ================================================================== [ 51.689388] Disabling lock debugging due to kernel taint [ 53.236214] BUG: Bad rss-counter state mm:00000000588fca8c type:MM_FILEPAGES val:33 [ 53.236997] BUG: Bad rss-counter state mm:00000000588fca8c type:MM_ANONPAGES val:22 [ 53.582273] BUG: Bad rss-counter state mm:000000000747fc5a type:MM_FILEPAGES val:33 [ 53.582960] BUG: Bad rss-counter state mm:000000000747fc5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21631' (ECDSA) to the list of known hosts. 2023/06/20 09:14:56 fuzzer started 2023/06/20 09:14:56 dialing manager at localhost:44161 2023/06/20 09:14:56 checking machine... 2023/06/20 09:14:56 checking revisions... [ 54.184023] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:14:56 testing simple program... [ 54.222204] cgroup: Unknown subsys name 'net' [ 54.261152] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:14:43 Registers: info registers vcpu 0 RAX=1ffff1100d9c746e RBX=ffff88806ce3a2c0 RCX=ffffffff81378ab5 RDX=ffff888013b50080 RSI=fffffffffffffff6 RDI=ffff88806ce3a360 RBP=ffff88806ce35000 RSP=ffff88806ce09e58 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=fffffffffffffff6 R13=ffff88806ce09ee8 R14=ffff88806ce3a360 R15=0000000000000200 RIP=ffffffff8137fe65 RFL=00000092 [--S-A--] 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 00007fab7a419700 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=00007ffcc95ebb48 CR3=000000001038a000 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=2036353a34313a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888010307af8 RSP=ffff888010307a30 R8 =ffffffff860d68fa R9 =ffff888010307ae0 R10=0000000000038001 R11=0000000000010b7e R12=ffff888010307b00 R13=ffff888010307ae8 R14=ffff888010307bd8 R15=ffff888010307aa0 RIP=ffffffff81131162 RFL=00000297 [--S-APC] 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 00007f3007f62900 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=00007f3008519618 CR3=000000000c6a2000 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=563412feff00545000000000000080fe 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