syzkaller login: [ 30.573701] BUG: Bad rss-counter state mm:000000003eb5d2ec type:MM_FILEPAGES val:33 [ 30.574994] BUG: Bad rss-counter state mm:000000003eb5d2ec type:MM_ANONPAGES val:22 [ 30.730914] ================================================================== [ 30.731989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.733086] Read of size 8 at addr ffff88800f08ded8 by task sshd/221 [ 30.734134] [ 30.734413] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.735412] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.736557] Call Trace: [ 30.736935] [ 30.737266] dump_stack_lvl+0x91/0xf0 [ 30.737841] print_report+0xcc/0x620 [ 30.738417] ? __virt_addr_valid+0x102/0x340 [ 30.739064] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740517] kasan_report+0xbe/0xf0 [ 30.741096] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741845] vma_interval_tree_remove+0xc75/0xec0 [ 30.742598] vma_prepare+0xc54/0x11a0 [ 30.743182] __split_vma+0x5af/0x950 [ 30.743764] ? __pfx___split_vma+0x10/0x10 [ 30.744405] ? find_held_lock+0x2c/0x110 [ 30.745035] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.745717] ? lock_is_held_type+0x9f/0x120 [ 30.746399] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.747136] ? mtree_range_walk+0x632/0x900 [ 30.747810] ? mas_walk+0x5c7/0x7c0 [ 30.748394] do_vmi_munmap+0x1f1/0x2b0 [ 30.748996] mmap_region+0x1f9/0x2660 [ 30.749581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.750205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.751065] ? __pfx_lock_acquire+0x10/0x10 [ 30.751715] ? __pfx_mmap_region+0x10/0x10 [ 30.752353] ? security_mmap_addr+0x7d/0xa0 [ 30.752994] ? get_unmapped_area+0x1f5/0x3f0 [ 30.753666] do_mmap+0x854/0xf00 [ 30.754219] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.754820] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.755503] ksys_mmap_pgoff+0x3af/0x500 [ 30.756121] do_syscall_64+0x3f/0x90 [ 30.756703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757492] RIP: 0033:0x7fe5501afd82 [ 30.758048] 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 [ 30.760660] RSP: 002b:00007fff85614ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.761767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5501afd82 [ 30.762803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe54f5e9000 [ 30.763846] RBP: 00007fe54f5e9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.764885] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b5a1ebec0 [ 30.765912] R13: 00007fff85614b00 R14: 00007fff85614b30 R15: 00007fff85614e90 [ 30.766957] [ 30.767307] [ 30.767567] Allocated by task 214: [ 30.768086] kasan_save_stack+0x22/0x50 [ 30.768697] kasan_set_track+0x25/0x30 [ 30.769302] __kasan_slab_alloc+0x59/0x70 [ 30.769925] kmem_cache_alloc+0x16b/0x370 [ 30.770555] vm_area_dup+0x20/0x160 [ 30.771100] __split_vma+0x170/0x950 [ 30.771659] split_vma+0xc6/0x110 [ 30.772185] mprotect_fixup+0x8d2/0xb30 [ 30.772789] do_mprotect_pkey+0x87e/0xd40 [ 30.773426] __x64_sys_mprotect+0x78/0xc0 [ 30.774051] do_syscall_64+0x3f/0x90 [ 30.774738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775516] [ 30.775775] Freed by task 214: [ 30.776245] kasan_save_stack+0x22/0x50 [ 30.776846] kasan_set_track+0x25/0x30 [ 30.777435] kasan_save_free_info+0x2b/0x50 [ 30.778075] __kasan_slab_free+0x10a/0x190 [ 30.778730] kmem_cache_free+0x10d/0x4d0 [ 30.779339] rcu_core+0x8c8/0x2860 [ 30.779854] __do_softirq+0x1b7/0x7d4 [ 30.780414] [ 30.780664] Last potentially related work creation: [ 30.781326] kasan_save_stack+0x22/0x50 [ 30.781902] __kasan_record_aux_stack+0x8e/0xa0 [ 30.782575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.783311] remove_vma+0x139/0x170 [ 30.783822] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.784453] do_vmi_munmap+0x1f1/0x2b0 [ 30.785003] __vm_munmap+0x138/0x3a0 [ 30.785540] __x64_sys_munmap+0x59/0x80 [ 30.786116] do_syscall_64+0x3f/0x90 [ 30.786676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787418] [ 30.787672] The buggy address belongs to the object at ffff88800f08de80 [ 30.787672] which belongs to the cache vm_area_struct of size 168 [ 30.789399] The buggy address is located 88 bytes inside of [ 30.789399] freed 168-byte region [ffff88800f08de80, ffff88800f08df28) [ 30.791072] [ 30.791327] The buggy address belongs to the physical page: [ 30.792114] page:00000000512b2649 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf08d [ 30.793398] memcg:ffff88800ec3d601 [ 30.793907] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.794678] page_type: 0xffffffff() [ 30.795202] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.796275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec3d601 [ 30.797332] page dumped because: kasan: bad access detected [ 30.798106] [ 30.798368] Memory state around the buggy address: [ 30.799044] ffff88800f08dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.800042] ffff88800f08de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.801035] >ffff88800f08de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.802026] ^ [ 30.802886] ffff88800f08df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.803896] ffff88800f08df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.804894] ================================================================== [ 30.806143] Disabling lock debugging due to kernel taint [ 33.137112] BUG: Bad rss-counter state mm:000000004aba25c5 type:MM_FILEPAGES val:33 [ 33.138299] BUG: Bad rss-counter state mm:000000004aba25c5 type:MM_ANONPAGES val:22 [ 33.537407] BUG: Bad rss-counter state mm:00000000d7dc2b9b type:MM_FILEPAGES val:33 [ 33.538439] BUG: Bad rss-counter state mm:00000000d7dc2b9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65252' (ECDSA) to the list of known hosts. 2023/06/20 16:10:50 fuzzer started 2023/06/20 16:10:50 dialing manager at localhost:36067 2023/06/20 16:10:50 checking machine... 2023/06/20 16:10:50 checking revisions... [ 34.272191] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:10:50 testing simple program... [ 34.318798] cgroup: Unknown subsys name 'net' [ 34.358907] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:10:49 Registers: info registers vcpu 0 RAX=00000000483c671c RBX=000000004bbc81b8 RCX=ffff88806ce09b94 RDX=0000000000000007 RSI=000000000000000b RDI=00000000c4ae88cf RBP=0000000000000000 RSP=ffff88806ce09b20 R8 =0000000038bbc790 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce09b88 R15=0000000000000007 RIP=ffffffff82270498 RFL=00000286 [--S--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 00007f5956238900 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=00007f59567f00b0 CR3=0000000015e10000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8185af33 RBX=0000000000000001 RCX=ffffffff861414ba RDX=dffffc0000000000 RSI=ffff888014607e80 RDI=1ffff110028c0f15 RBP=ffff8880146078a8 RSP=ffff8880146077e0 R8 =ffffffff861414be R9 =ffff888014607890 R10=0000000000038001 R11=00000000000223eb R12=ffff8880146078b0 R13=ffff888014607898 R14=ffff888014607e88 R15=ffff888014607850 RIP=ffffffff81131061 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 00007fe14f80b900 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=00007fe14ec39400 CR3=000000000d60c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a79a6979d97c9b5800000000000ae988 XMM05=bbce6b805be293170000000000132f58 XMM06=c291bd5c70af25b90000000000131d48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000