syzkaller login: [ 36.746411] BUG: Bad rss-counter state mm:00000000d718d13d type:MM_FILEPAGES val:33 [ 36.747075] BUG: Bad rss-counter state mm:00000000d718d13d type:MM_ANONPAGES val:22 [ 36.863788] ================================================================== [ 36.865235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.866470] Read of size 8 at addr ffff888018388058 by task sshd/222 [ 36.867498] [ 36.867781] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.868976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.870257] Call Trace: [ 36.870686] [ 36.871062] dump_stack_lvl+0x91/0xf0 [ 36.871710] print_report+0xcc/0x620 [ 36.872350] ? __virt_addr_valid+0x102/0x340 [ 36.873100] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.873910] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.874775] kasan_report+0xbe/0xf0 [ 36.875459] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.876343] vma_interval_tree_remove+0xc75/0xec0 [ 36.877223] vma_prepare+0xc54/0x11a0 [ 36.877896] __split_vma+0x5af/0x950 [ 36.878565] ? __pfx___split_vma+0x10/0x10 [ 36.879320] ? find_held_lock+0x2c/0x110 [ 36.880054] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.880868] ? lock_is_held_type+0x9f/0x120 [ 36.881630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.882476] ? mtree_range_walk+0x632/0x900 [ 36.883260] ? mas_walk+0x5c7/0x7c0 [ 36.883927] do_vmi_munmap+0x1f1/0x2b0 [ 36.884629] mmap_region+0x1f9/0x2660 [ 36.885284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.885993] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.886997] ? __pfx_lock_acquire+0x10/0x10 [ 36.887741] ? __pfx_mmap_region+0x10/0x10 [ 36.888469] ? security_mmap_addr+0x7d/0xa0 [ 36.889247] ? get_unmapped_area+0x1f5/0x3f0 [ 36.890006] do_mmap+0x854/0xf00 [ 36.890618] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.891310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.892096] ksys_mmap_pgoff+0x3af/0x500 [ 36.892820] do_syscall_64+0x3f/0x90 [ 36.893482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.894379] RIP: 0033:0x7fe621e1cd82 [ 36.895015] 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 [ 36.898006] RSP: 002b:00007ffe7c950818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.899263] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe621e1cd82 [ 36.900443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe621256000 [ 36.901555] RBP: 00007fe621256000 R08: 0000000000000009 R09: 0000000000001000 [ 36.902626] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e093150ec0 [ 36.903699] R13: 00007ffe7c950830 R14: 00007ffe7c950860 R15: 00007ffe7c950bc0 [ 36.904780] [ 36.905153] [ 36.905456] Allocated by task 212: [ 36.906090] kasan_save_stack+0x22/0x50 [ 36.906814] kasan_set_track+0x25/0x30 [ 36.907432] __kasan_slab_alloc+0x59/0x70 [ 36.908085] kmem_cache_alloc+0x16b/0x370 [ 36.908767] vm_area_dup+0x20/0x160 [ 36.909362] __split_vma+0x170/0x950 [ 36.909974] split_vma+0xc6/0x110 [ 36.910543] mprotect_fixup+0x8d2/0xb30 [ 36.911189] do_mprotect_pkey+0x87e/0xd40 [ 36.911861] __x64_sys_mprotect+0x78/0xc0 [ 36.912563] do_syscall_64+0x3f/0x90 [ 36.913198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.914044] [ 36.914321] Freed by task 203: [ 36.914829] kasan_save_stack+0x22/0x50 [ 36.915473] kasan_set_track+0x25/0x30 [ 36.916106] kasan_save_free_info+0x2b/0x50 [ 36.916812] __kasan_slab_free+0x10a/0x190 [ 36.917511] kmem_cache_free+0x10d/0x4d0 [ 36.918179] rcu_core+0x8c8/0x2860 [ 36.918753] __do_softirq+0x1b7/0x7d4 [ 36.919370] [ 36.919651] Last potentially related work creation: [ 36.920401] kasan_save_stack+0x22/0x50 [ 36.921105] __kasan_record_aux_stack+0x8e/0xa0 [ 36.921846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.922651] remove_vma+0x139/0x170 [ 36.923237] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.923955] do_vmi_munmap+0x1f1/0x2b0 [ 36.924607] __vm_munmap+0x138/0x3a0 [ 36.925209] __x64_sys_munmap+0x59/0x80 [ 36.925850] do_syscall_64+0x3f/0x90 [ 36.926463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.927317] [ 36.927609] Second to last potentially related work creation: [ 36.928485] kasan_save_stack+0x22/0x50 [ 36.929164] __kasan_record_aux_stack+0x8e/0xa0 [ 36.929926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.930769] remove_vma+0x139/0x170 [ 36.931364] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.932085] do_vmi_munmap+0x1f1/0x2b0 [ 36.932724] mmap_region+0x1f9/0x2660 [ 36.933336] do_mmap+0x854/0xf00 [ 36.933901] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.934579] ksys_mmap_pgoff+0x3af/0x500 [ 36.935279] do_syscall_64+0x3f/0x90 [ 36.935941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.936856] [ 36.937153] The buggy address belongs to the object at ffff888018388000 [ 36.937153] which belongs to the cache vm_area_struct of size 168 [ 36.939035] The buggy address is located 88 bytes inside of [ 36.939035] freed 168-byte region [ffff888018388000, ffff8880183880a8) [ 36.940872] [ 36.941148] The buggy address belongs to the physical page: [ 36.941972] page:00000000600e4b63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18388 [ 36.943456] memcg:ffff88800c68b901 [ 36.944006] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.944924] page_type: 0xffffffff() [ 36.945525] raw: 0100000000000200 ffff8880087a0c80 ffffea000065ac40 0000000000000007 [ 36.946731] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c68b901 [ 36.947874] page dumped because: kasan: bad access detected [ 36.948728] [ 36.948996] Memory state around the buggy address: [ 36.949718] ffff888018387f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.950800] ffff888018387f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.951880] >ffff888018388000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.952985] ^ [ 36.953910] ffff888018388080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.954989] ffff888018388100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.956067] ================================================================== [ 36.957316] Disabling lock debugging due to kernel taint [ 39.683467] BUG: Bad rss-counter state mm:00000000d3f86423 type:MM_FILEPAGES val:33 [ 39.684609] BUG: Bad rss-counter state mm:00000000d3f86423 type:MM_ANONPAGES val:22 [ 40.159612] BUG: Bad rss-counter state mm:000000009a80df12 type:MM_FILEPAGES val:33 [ 40.160807] BUG: Bad rss-counter state mm:000000009a80df12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20334' (ECDSA) to the list of known hosts. 2023/06/21 00:06:43 fuzzer started 2023/06/21 00:06:43 dialing manager at localhost:36067 2023/06/21 00:06:43 checking machine... 2023/06/21 00:06:43 checking revisions... [ 40.946612] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:06:44 testing simple program... [ 40.999913] cgroup: Unknown subsys name 'net' [ 41.045255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:06:43 Registers: info registers vcpu 0 RAX=0000000000000058 RBX=0000563b2b60e360 RCX=00000000000001c3 RDX=00000000ffffffff RSI=0000563b2b614240 RDI=0000563b2b60e360 RBP=0000563b2b60e360 RSP=00007fff762eeab0 R8 =0000000000000027 R9 =00007fff7638f080 R10=00007fff7638f0f0 R11=000000000000e79e R12=0000000000000058 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=00007fdecb1c6ce6 RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdeca6d5900 00000000 00000000 GS =0000 0000000000000000 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=00007fdec9afef60 CR3=000000001456a000 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=ec0ec6c3ee3584899b4e69da4d0881b3 XMM02=000000000011aa48eff9b2d0a8fce9cb XMM03=000000000011ab182c67c8bc2e329bc3 XMM04=3f6ec9bb9f84cee300000000000ae988 XMM05=8da86341e3b8fd270000000000134be0 XMM06=59d5b690e0af863b0000000000133a40 XMM07=fb795ef6d65770560000000000122a98 XMM08=2c67c8bc2e329bc3000000000011aab8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff852c95b8 RCX=0000000000000000 RDX=ffff8880199b0000 RSI=ffffffff81eefccc RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff8880198b79a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800b5a0c98 R14=0000000000000081 R15=ffff88800b5a0c9a RIP=ffffffff814c089b 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 00007f167a75e900 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=000055cc8e5a3954 CR3=000000000e2d6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000