syzkaller login: [ 31.538291] BUG: Bad rss-counter state mm:000000005df42482 type:MM_FILEPAGES val:33 [ 31.540131] BUG: Bad rss-counter state mm:000000005df42482 type:MM_ANONPAGES val:22 [ 31.698700] ================================================================== [ 31.699596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.700524] Read of size 8 at addr ffff888017c3e6b0 by task sshd/220 [ 31.701295] [ 31.701626] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.702503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.703474] Call Trace: [ 31.703792] [ 31.704072] dump_stack_lvl+0x91/0xf0 [ 31.704565] print_report+0xcc/0x620 [ 31.705048] ? __virt_addr_valid+0x102/0x340 [ 31.705631] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706244] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706856] kasan_report+0xbe/0xf0 [ 31.707330] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.707953] vma_interval_tree_remove+0xc75/0xec0 [ 31.708556] vma_prepare+0xc54/0x11a0 [ 31.709045] __split_vma+0x5af/0x950 [ 31.709523] ? __pfx___split_vma+0x10/0x10 [ 31.710057] ? find_held_lock+0x2c/0x110 [ 31.710582] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.711145] ? lock_is_held_type+0x9f/0x120 [ 31.711682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.712295] ? mtree_range_walk+0x632/0x900 [ 31.712841] ? mas_walk+0x5c7/0x7c0 [ 31.713319] do_vmi_munmap+0x1f1/0x2b0 [ 31.713808] mmap_region+0x1f9/0x2660 [ 31.714293] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.714802] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.715510] ? __pfx_lock_acquire+0x10/0x10 [ 31.716049] ? __pfx_mmap_region+0x10/0x10 [ 31.716586] ? security_mmap_addr+0x7d/0xa0 [ 31.717110] ? get_unmapped_area+0x1f5/0x3f0 [ 31.717680] do_mmap+0x854/0xf00 [ 31.718120] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.718615] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.719181] ksys_mmap_pgoff+0x3af/0x500 [ 31.719685] do_syscall_64+0x3f/0x90 [ 31.720160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.720802] RIP: 0033:0x7f18112a9d82 [ 31.721272] 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 [ 31.723385] RSP: 002b:00007ffe36c691c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.724284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18112a9d82 [ 31.725137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18106e3000 [ 31.725999] RBP: 00007f18106e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.726855] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2b1944ec0 [ 31.727690] R13: 00007ffe36c691e0 R14: 00007ffe36c69210 R15: 00007ffe36c69570 [ 31.728550] [ 31.728842] [ 31.729056] Allocated by task 213: [ 31.729502] kasan_save_stack+0x22/0x50 [ 31.730015] kasan_set_track+0x25/0x30 [ 31.730508] __kasan_slab_alloc+0x59/0x70 [ 31.731038] kmem_cache_alloc+0x16b/0x370 [ 31.731556] vm_area_dup+0x20/0x160 [ 31.732012] __split_vma+0x170/0x950 [ 31.732477] split_vma+0xc6/0x110 [ 31.732914] mprotect_fixup+0x8d2/0xb30 [ 31.733418] do_mprotect_pkey+0x87e/0xd40 [ 31.733951] __x64_sys_mprotect+0x78/0xc0 [ 31.734483] do_syscall_64+0x3f/0x90 [ 31.734956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.735600] [ 31.735814] Freed by task 213: [ 31.736210] kasan_save_stack+0x22/0x50 [ 31.736710] kasan_set_track+0x25/0x30 [ 31.737200] kasan_save_free_info+0x2b/0x50 [ 31.737761] __kasan_slab_free+0x10a/0x190 [ 31.738298] kmem_cache_free+0x10d/0x4d0 [ 31.738810] rcu_core+0x8c8/0x2860 [ 31.739252] __do_softirq+0x1b7/0x7d4 [ 31.739731] [ 31.739947] Last potentially related work creation: [ 31.740532] kasan_save_stack+0x22/0x50 [ 31.741032] __kasan_record_aux_stack+0x8e/0xa0 [ 31.741620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.742270] remove_vma+0x139/0x170 [ 31.742719] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.743354] do_vmi_munmap+0x1f1/0x2b0 [ 31.743844] __vm_munmap+0x138/0x3a0 [ 31.744318] __x64_sys_munmap+0x59/0x80 [ 31.744813] do_syscall_64+0x3f/0x90 [ 31.745310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.745963] [ 31.746177] The buggy address belongs to the object at ffff888017c3e658 [ 31.746177] which belongs to the cache vm_area_struct of size 168 [ 31.747646] The buggy address is located 88 bytes inside of [ 31.747646] freed 168-byte region [ffff888017c3e658, ffff888017c3e700) [ 31.749046] [ 31.749265] The buggy address belongs to the physical page: [ 31.749929] page:00000000e9647e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c3e [ 31.751018] memcg:ffff8880184d2301 [ 31.751445] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.752099] page_type: 0xffffffff() [ 31.752550] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.753477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880184d2301 [ 31.754378] page dumped because: kasan: bad access detected [ 31.755049] [ 31.755266] Memory state around the buggy address: [ 31.755857] ffff888017c3e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.756720] ffff888017c3e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.757611] >ffff888017c3e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.758467] ^ [ 31.759052] ffff888017c3e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.759907] ffff888017c3e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.760756] ================================================================== [ 31.761870] Disabling lock debugging due to kernel taint [ 34.557736] BUG: Bad rss-counter state mm:00000000b1d53171 type:MM_FILEPAGES val:33 [ 34.558762] BUG: Bad rss-counter state mm:00000000b1d53171 type:MM_ANONPAGES val:22 [ 35.065745] BUG: Bad rss-counter state mm:00000000311f5613 type:MM_FILEPAGES val:33 [ 35.067025] BUG: Bad rss-counter state mm:00000000311f5613 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59960' (ECDSA) to the list of known hosts. 2023/06/19 13:59:51 fuzzer started 2023/06/19 13:59:51 dialing manager at localhost:44161 2023/06/19 13:59:51 checking machine... 2023/06/19 13:59:51 checking revisions... [ 35.754773] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:59:51 testing simple program... [ 35.807036] cgroup: Unknown subsys name 'net' [ 35.854627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:59:50 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce098f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f009 RFL=00000246 [---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 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=00007ffe02e7b678 CR3=0000000015b78000 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=2030353a39353a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a39353a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f5a2e049700 CR3=000000000f6ce000 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=8b238259567af8a1f744bf2a17466de1 XMM02=000000000011bdb0ec2efd57dc4c00df XMM03=00000000001235e0aa15beebf1006a0a XMM04=57064ecd694b2bc200000000000ae988 XMM05=19e9129bd510f23500000000001330d0 XMM06=5c8d51858cabd6bd00000000001317d0 XMM07=e042d86d42eb936e0000000000123860 XMM08=aa15beebf1006a0a000000000011be10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000