syzkaller login: [ 38.546862] BUG: Bad rss-counter state mm:0000000000d106b1 type:MM_FILEPAGES val:33 [ 38.547528] BUG: Bad rss-counter state mm:0000000000d106b1 type:MM_ANONPAGES val:22 [ 38.667831] ================================================================== [ 38.668469] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.669095] Read of size 8 at addr ffff888019bc53f8 by task sshd/220 [ 38.669606] [ 38.669756] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.670368] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.671052] Call Trace: [ 38.671269] [ 38.671464] dump_stack_lvl+0x91/0xf0 [ 38.671954] print_report+0xcc/0x620 [ 38.672279] ? __virt_addr_valid+0x102/0x340 [ 38.672651] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.673066] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.673475] kasan_report+0xbe/0xf0 [ 38.674002] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.674423] vma_interval_tree_remove+0xc75/0xec0 [ 38.674826] vma_prepare+0xc54/0x11a0 [ 38.675147] __split_vma+0x5af/0x950 [ 38.675464] ? __pfx___split_vma+0x10/0x10 [ 38.675898] ? find_held_lock+0x2c/0x110 [ 38.676248] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.676641] ? lock_is_held_type+0x9f/0x120 [ 38.677014] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.677419] ? mtree_range_walk+0x632/0x900 [ 38.677795] ? mas_walk+0x5c7/0x7c0 [ 38.678139] do_vmi_munmap+0x1f1/0x2b0 [ 38.678471] mmap_region+0x1f9/0x2660 [ 38.678790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.679137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.679623] ? __pfx_lock_acquire+0x10/0x10 [ 38.679979] ? __pfx_mmap_region+0x10/0x10 [ 38.680346] ? security_mmap_addr+0x7d/0xa0 [ 38.680702] ? get_unmapped_area+0x1f5/0x3f0 [ 38.681073] do_mmap+0x854/0xf00 [ 38.681366] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.681698] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.682117] ksys_mmap_pgoff+0x3af/0x500 [ 38.682457] do_syscall_64+0x3f/0x90 [ 38.682784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.683222] RIP: 0033:0x7fef07552d82 [ 38.683531] 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 [ 38.684951] RSP: 002b:00007ffe33ef85c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.685557] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef07552d82 [ 38.686157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef0698c000 [ 38.686748] RBP: 00007fef0698c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.687331] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be76745ec0 [ 38.687931] R13: 00007ffe33ef85e0 R14: 00007ffe33ef8610 R15: 00007ffe33ef8970 [ 38.688531] [ 38.688740] [ 38.688891] Allocated by task 213: [ 38.689187] kasan_save_stack+0x22/0x50 [ 38.689545] kasan_set_track+0x25/0x30 [ 38.689922] __kasan_slab_alloc+0x59/0x70 [ 38.690293] kmem_cache_alloc+0x16b/0x370 [ 38.690654] vm_area_dup+0x20/0x160 [ 38.690968] __split_vma+0x170/0x950 [ 38.691291] split_vma+0xc6/0x110 [ 38.691598] mprotect_fixup+0x8d2/0xb30 [ 38.691950] do_mprotect_pkey+0x87e/0xd40 [ 38.692307] __x64_sys_mprotect+0x78/0xc0 [ 38.692675] do_syscall_64+0x3f/0x90 [ 38.693011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.693466] [ 38.693619] Freed by task 204: [ 38.693912] kasan_save_stack+0x22/0x50 [ 38.694260] kasan_set_track+0x25/0x30 [ 38.694607] kasan_save_free_info+0x2b/0x50 [ 38.694977] __kasan_slab_free+0x10a/0x190 [ 38.695342] kmem_cache_free+0x10d/0x4d0 [ 38.695683] rcu_core+0x8c8/0x2860 [ 38.695999] __do_softirq+0x1b7/0x7d4 [ 38.696333] [ 38.696484] Last potentially related work creation: [ 38.696891] kasan_save_stack+0x22/0x50 [ 38.697239] __kasan_record_aux_stack+0x8e/0xa0 [ 38.697640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.698095] remove_vma+0x139/0x170 [ 38.698394] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.698774] do_vmi_munmap+0x1f1/0x2b0 [ 38.699105] __vm_munmap+0x138/0x3a0 [ 38.699419] __x64_sys_munmap+0x59/0x80 [ 38.699763] do_syscall_64+0x3f/0x90 [ 38.700094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.700543] [ 38.700696] The buggy address belongs to the object at ffff888019bc53a0 [ 38.700696] which belongs to the cache vm_area_struct of size 168 [ 38.701711] The buggy address is located 88 bytes inside of [ 38.701711] freed 168-byte region [ffff888019bc53a0, ffff888019bc5448) [ 38.702729] [ 38.702879] The buggy address belongs to the physical page: [ 38.703338] page:000000001aa38de9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bc5 [ 38.704103] memcg:ffff88801a039301 [ 38.704397] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.704850] page_type: 0xffffffff() [ 38.705165] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.705800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a039301 [ 38.706457] page dumped because: kasan: bad access detected [ 38.706915] [ 38.707065] Memory state around the buggy address: [ 38.707466] ffff888019bc5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.708057] ffff888019bc5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.708666] >ffff888019bc5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.709262] ^ [ 38.709877] ffff888019bc5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.710470] ffff888019bc5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.711070] ================================================================== [ 38.711753] Disabling lock debugging due to kernel taint [ 40.487390] BUG: Bad rss-counter state mm:0000000066c870b9 type:MM_FILEPAGES val:33 [ 40.488085] BUG: Bad rss-counter state mm:0000000066c870b9 type:MM_ANONPAGES val:22 [ 40.844464] BUG: Bad rss-counter state mm:000000008981f266 type:MM_FILEPAGES val:33 [ 40.845141] BUG: Bad rss-counter state mm:000000008981f266 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38099' (ECDSA) to the list of known hosts. 2023/06/21 09:34:53 fuzzer started 2023/06/21 09:34:53 dialing manager at localhost:36067 2023/06/21 09:34:53 checking machine... 2023/06/21 09:34:53 checking revisions... [ 41.358862] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:34:53 testing simple program... [ 41.388020] cgroup: Unknown subsys name 'net' [ 41.438680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:34:53 Registers: info registers vcpu 0 RAX=0000000000000012 RBX=0000000000000002 RCX=ffffffff8451105d RDX=0000000000000012 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffff88806ce09af0 RSP=ffff88806ce099e0 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f61c R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc27 RFL=00000206 [-----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 00007f1493324900 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=00007f14938db618 CR3=000000001c944000 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=00007fe3fd3ebca0 CR3=00000000096d8000 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=19e2b4ed73cb439f7b45f805319868b4 XMM02=000000000011c298ec2efd57dc4c00df XMM03=00000000001224c076ca010619e55c9e XMM04=c9bfc02c80b6247a00000000000ae988 XMM05=fc9ed6e770330c950000000000133240 XMM06=4fda316b135da52b0000000000131f70 XMM07=e042d86d42eb936e0000000000122798 XMM08=76ca010619e55c9e000000000011c2f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000