syzkaller login: [ 30.580773] BUG: Bad rss-counter state mm:00000000bcc23aa7 type:MM_FILEPAGES val:33 [ 30.582257] BUG: Bad rss-counter state mm:00000000bcc23aa7 type:MM_ANONPAGES val:22 [ 30.747392] ================================================================== [ 30.748428] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.749457] Read of size 8 at addr ffff88800df5a5c8 by task sshd/219 [ 30.750427] [ 30.750666] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.751617] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.752721] Call Trace: [ 30.753078] [ 30.753388] dump_stack_lvl+0x91/0xf0 [ 30.753934] print_report+0xcc/0x620 [ 30.754460] ? __virt_addr_valid+0x102/0x340 [ 30.755067] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755748] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756425] kasan_report+0xbe/0xf0 [ 30.756969] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757683] vma_interval_tree_remove+0xc75/0xec0 [ 30.758375] vma_prepare+0xc54/0x11a0 [ 30.758922] __split_vma+0x5af/0x950 [ 30.759461] ? __pfx___split_vma+0x10/0x10 [ 30.760063] ? find_held_lock+0x2c/0x110 [ 30.760654] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.761298] ? lock_is_held_type+0x9f/0x120 [ 30.761932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.762628] ? mtree_range_walk+0x632/0x900 [ 30.763258] ? mas_walk+0x5c7/0x7c0 [ 30.763799] do_vmi_munmap+0x1f1/0x2b0 [ 30.764363] mmap_region+0x1f9/0x2660 [ 30.764915] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.765503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.766300] ? __pfx_lock_acquire+0x10/0x10 [ 30.766889] ? __pfx_mmap_region+0x10/0x10 [ 30.767479] ? security_mmap_addr+0x7d/0xa0 [ 30.768078] ? get_unmapped_area+0x1f5/0x3f0 [ 30.768704] do_mmap+0x854/0xf00 [ 30.769208] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.769771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.770411] ksys_mmap_pgoff+0x3af/0x500 [ 30.770985] do_syscall_64+0x3f/0x90 [ 30.771524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772261] RIP: 0033:0x7ff5e1c08d82 [ 30.772782] 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 [ 30.775215] RSP: 002b:00007ffcb6259618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.776251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5e1c08d82 [ 30.777206] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5e1042000 [ 30.778170] RBP: 00007ff5e1042000 R08: 0000000000000009 R09: 0000000000001000 [ 30.779131] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580ebf76ec0 [ 30.780079] R13: 00007ffcb6259630 R14: 00007ffcb6259660 R15: 00007ffcb62599c0 [ 30.781034] [ 30.781364] [ 30.781613] Allocated by task 212: [ 30.782095] kasan_save_stack+0x22/0x50 [ 30.782661] kasan_set_track+0x25/0x30 [ 30.783217] __kasan_slab_alloc+0x59/0x70 [ 30.783806] kmem_cache_alloc+0x16b/0x370 [ 30.784392] vm_area_dup+0x20/0x160 [ 30.784902] __split_vma+0x170/0x950 [ 30.785425] split_vma+0xc6/0x110 [ 30.785937] mprotect_fixup+0x8d2/0xb30 [ 30.786499] do_mprotect_pkey+0x87e/0xd40 [ 30.787086] __x64_sys_mprotect+0x78/0xc0 [ 30.787664] do_syscall_64+0x3f/0x90 [ 30.788198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788907] [ 30.789151] Freed by task 212: [ 30.789597] kasan_save_stack+0x22/0x50 [ 30.790160] kasan_set_track+0x25/0x30 [ 30.790706] kasan_save_free_info+0x2b/0x50 [ 30.791305] __kasan_slab_free+0x10a/0x190 [ 30.791904] kmem_cache_free+0x10d/0x4d0 [ 30.792470] rcu_core+0x8c8/0x2860 [ 30.792967] __do_softirq+0x1b7/0x7d4 [ 30.793518] [ 30.793762] Last potentially related work creation: [ 30.794417] kasan_save_stack+0x22/0x50 [ 30.794973] __kasan_record_aux_stack+0x8e/0xa0 [ 30.795607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.796327] remove_vma+0x139/0x170 [ 30.796830] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.797445] do_vmi_munmap+0x1f1/0x2b0 [ 30.797995] __vm_munmap+0x138/0x3a0 [ 30.798516] __x64_sys_munmap+0x59/0x80 [ 30.799066] do_syscall_64+0x3f/0x90 [ 30.799592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800308] [ 30.800545] The buggy address belongs to the object at ffff88800df5a570 [ 30.800545] which belongs to the cache vm_area_struct of size 168 [ 30.802397] The buggy address is located 88 bytes inside of [ 30.802397] freed 168-byte region [ffff88800df5a570, ffff88800df5a618) [ 30.804181] [ 30.804453] The buggy address belongs to the physical page: [ 30.805273] page:000000001d45d5ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf5a [ 30.806695] memcg:ffff88800de8e101 [ 30.807243] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.808066] page_type: 0xffffffff() [ 30.808630] raw: 0100000000000200 ffff8880087a0c80 ffffea00003698c0 dead000000000006 [ 30.809817] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de8e101 [ 30.810991] page dumped because: kasan: bad access detected [ 30.811826] [ 30.812110] Memory state around the buggy address: [ 30.812824] ffff88800df5a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.813921] ffff88800df5a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.815035] >ffff88800df5a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.816106] ^ [ 30.816932] ffff88800df5a600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.818065] ffff88800df5a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.818986] ================================================================== [ 30.819991] Disabling lock debugging due to kernel taint [ 33.113234] BUG: Bad rss-counter state mm:00000000d5de198c type:MM_FILEPAGES val:33 [ 33.114399] BUG: Bad rss-counter state mm:00000000d5de198c type:MM_ANONPAGES val:22 [ 33.603493] BUG: Bad rss-counter state mm:000000001e19f498 type:MM_FILEPAGES val:33 [ 33.604649] BUG: Bad rss-counter state mm:000000001e19f498 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40548' (ECDSA) to the list of known hosts. 2023/06/21 08:51:11 fuzzer started 2023/06/21 08:51:12 dialing manager at localhost:36067 2023/06/21 08:51:12 checking machine... 2023/06/21 08:51:12 checking revisions... [ 34.323344] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:51:12 testing simple program... [ 34.381151] cgroup: Unknown subsys name 'net' [ 34.440694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:51:11 Registers: info registers vcpu 0 RAX=1ffffffff0bb31d3 RBX=ffffffff85d98e98 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff860a1416 RDI=ffffffff85d98e78 RBP=ffffffff85d98e98 RSP=ffff88806ce099e0 R8 =ffffffff860a1416 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d98e9c R13=ffffffff85d98e78 R14=ffffffff85d98e94 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 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=00007ffd2a1e9c38 CR3=000000000e404000 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=2031313a31353a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a31353a3830203132 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=0000000000000001 RDX=ffff88800fca7c01 RSI=ffff88800fca7ce8 RDI=ffff88800fca7ce8 RBP=ffff88800fca77a0 RSP=ffff88800fca76d8 R8 =0000000000000001 R9 =ffff88800fca7788 R10=0000000000038001 R11=000000000008a88c R12=ffff88800fca77a8 R13=ffff88800fca7790 R14=ffff88800fca7ce8 R15=ffff88800fca7748 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f569a76f900 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=00007f569ad26618 CR3=0000000019fd6000 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=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