syzkaller login: [ 44.897634] BUG: Bad rss-counter state mm:00000000dcbfb75a type:MM_FILEPAGES val:33 [ 44.898854] BUG: Bad rss-counter state mm:00000000dcbfb75a type:MM_ANONPAGES val:22 [ 45.059022] ================================================================== [ 45.059952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.060900] Read of size 8 at addr ffff8880095be4e0 by task sshd/220 [ 45.061683] [ 45.061901] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.062866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.063846] Call Trace: [ 45.064165] [ 45.064454] dump_stack_lvl+0x91/0xf0 [ 45.064962] print_report+0xcc/0x620 [ 45.065444] ? __virt_addr_valid+0x102/0x340 [ 45.066008] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.066636] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.067263] kasan_report+0xbe/0xf0 [ 45.067752] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.068381] vma_interval_tree_remove+0xc75/0xec0 [ 45.068984] vma_prepare+0xc54/0x11a0 [ 45.069464] __split_vma+0x5af/0x950 [ 45.069943] ? __pfx___split_vma+0x10/0x10 [ 45.070476] ? find_held_lock+0x2c/0x110 [ 45.071007] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.071588] ? lock_is_held_type+0x9f/0x120 [ 45.072132] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.072741] ? mtree_range_walk+0x632/0x900 [ 45.073290] ? mas_walk+0x5c7/0x7c0 [ 45.073788] do_vmi_munmap+0x1f1/0x2b0 [ 45.074300] mmap_region+0x1f9/0x2660 [ 45.074799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.075316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.076045] ? __pfx_lock_acquire+0x10/0x10 [ 45.076596] ? __pfx_mmap_region+0x10/0x10 [ 45.077131] ? security_mmap_addr+0x7d/0xa0 [ 45.077680] ? get_unmapped_area+0x1f5/0x3f0 [ 45.078240] do_mmap+0x854/0xf00 [ 45.078689] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.079190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.079760] ksys_mmap_pgoff+0x3af/0x500 [ 45.080271] do_syscall_64+0x3f/0x90 [ 45.080748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.081395] RIP: 0033:0x7f54ead6dd82 [ 45.081871] 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 [ 45.083989] RSP: 002b:00007ffe08aea2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.084889] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54ead6dd82 [ 45.085747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54ea1a7000 [ 45.086602] RBP: 00007f54ea1a7000 R08: 0000000000000009 R09: 0000000000001000 [ 45.087468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1026fab20 [ 45.088311] R13: 00007ffe08aea2c0 R14: 00007ffe08aea2f0 R15: 00007ffe08aea650 [ 45.089173] [ 45.089465] [ 45.089699] Allocated by task 213: [ 45.090129] kasan_save_stack+0x22/0x50 [ 45.090640] kasan_set_track+0x25/0x30 [ 45.091132] __kasan_slab_alloc+0x59/0x70 [ 45.091660] kmem_cache_alloc+0x16b/0x370 [ 45.092179] vm_area_dup+0x20/0x160 [ 45.092644] __split_vma+0x170/0x950 [ 45.093117] split_vma+0xc6/0x110 [ 45.093564] mprotect_fixup+0x8d2/0xb30 [ 45.094090] do_mprotect_pkey+0x87e/0xd40 [ 45.094616] __x64_sys_mprotect+0x78/0xc0 [ 45.095147] do_syscall_64+0x3f/0x90 [ 45.095628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.096285] [ 45.096500] Freed by task 19: [ 45.096892] kasan_save_stack+0x22/0x50 [ 45.097395] kasan_set_track+0x25/0x30 [ 45.097905] kasan_save_free_info+0x2b/0x50 [ 45.098442] __kasan_slab_free+0x10a/0x190 [ 45.098974] kmem_cache_free+0x10d/0x4d0 [ 45.099494] rcu_core+0x8c8/0x2860 [ 45.099943] __do_softirq+0x1b7/0x7d4 [ 45.100427] [ 45.100651] Last potentially related work creation: [ 45.101238] kasan_save_stack+0x22/0x50 [ 45.101760] __kasan_record_aux_stack+0x8e/0xa0 [ 45.102333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.102977] remove_vma+0x139/0x170 [ 45.103438] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.104000] do_vmi_munmap+0x1f1/0x2b0 [ 45.104486] __vm_munmap+0x138/0x3a0 [ 45.104960] __x64_sys_munmap+0x59/0x80 [ 45.105460] do_syscall_64+0x3f/0x90 [ 45.105945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.106591] [ 45.106814] The buggy address belongs to the object at ffff8880095be488 [ 45.106814] which belongs to the cache vm_area_struct of size 168 [ 45.108282] The buggy address is located 88 bytes inside of [ 45.108282] freed 168-byte region [ffff8880095be488, ffff8880095be530) [ 45.109708] [ 45.109927] The buggy address belongs to the physical page: [ 45.110597] page:00000000639ded19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95be [ 45.111688] memcg:ffff88800e717201 [ 45.112121] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.112823] page_type: 0xffffffff() [ 45.113285] raw: 0100000000000200 ffff88800879fc80 ffffea0000257840 dead000000000007 [ 45.114216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e717201 [ 45.115150] page dumped because: kasan: bad access detected [ 45.115810] [ 45.116032] Memory state around the buggy address: [ 45.116623] ffff8880095be380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.117477] ffff8880095be400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 45.118352] >ffff8880095be480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.119223] ^ [ 45.119992] ffff8880095be500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 45.120848] ffff8880095be580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.121709] ================================================================== [ 45.122748] Disabling lock debugging due to kernel taint [ 47.782937] BUG: Bad rss-counter state mm:000000004ee8e0f2 type:MM_FILEPAGES val:33 [ 47.783900] BUG: Bad rss-counter state mm:000000004ee8e0f2 type:MM_ANONPAGES val:22 [ 48.350035] BUG: Bad rss-counter state mm:00000000339edbf0 type:MM_FILEPAGES val:33 [ 48.351233] BUG: Bad rss-counter state mm:00000000339edbf0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1691' (ECDSA) to the list of known hosts. 2023/06/19 20:05:10 fuzzer started 2023/06/19 20:05:11 dialing manager at localhost:44161 2023/06/19 20:05:11 checking machine... 2023/06/19 20:05:11 checking revisions... [ 49.010773] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:05:11 testing simple program... [ 49.063272] cgroup: Unknown subsys name 'net' [ 49.101686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806ce361a0 RSP=ffff88800c467cb8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6cb2 R12=0000000000000200 R13=ffff88806ce361c8 R14=0000000000000001 R15=ffff888018ef2000 RIP=ffffffff81534215 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc795cc4900 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=00007fc7950c5430 CR3=000000000f5e0000 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=b3285ca56c489dff000000000010c4a0 XMM01=23d6c6edd5c5f78e1d473684b1275378 XMM02=ec2efd57dc4c00df000000000011ce90 XMM03=0f7d771667fe9b56000000000011cf60 XMM04=c8b3ece6f8819bf700000000000ae988 XMM05=19e9129bd510f2350000000000133508 XMM06=ecb3f6d851081ca900000000001326e0 XMM07=e042d86d42eb936e0000000000123f48 XMM08=0f7d771667fe9b56000000000011cf60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e5df5e0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff84506c7f RDI=ffff88800e5df5ec RBP=0000000000000014 RSP=ffff88800e5df4f8 R8 =0000000000000001 R9 =ffff88800e5df558 R10=0000000000038001 R11=0000000000022733 R12=ffff88800e5df5e0 R13=0000000000000000 R14=ffff88800f310000 R15=ffff8880097ad680 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007fb5ade6b700 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=00007fff5bc4ac58 CR3=000000000ecc2000 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=2030313a35303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000