syzkaller login: [ 104.109598] BUG: Bad rss-counter state mm:000000005c8d7bb5 type:MM_FILEPAGES val:33 [ 104.110344] BUG: Bad rss-counter state mm:000000005c8d7bb5 type:MM_ANONPAGES val:22 [ 104.274421] ================================================================== [ 104.275360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 104.276308] Read of size 8 at addr ffff88800f5f8b38 by task sshd/219 [ 104.277098] [ 104.277321] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 104.278523] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 104.279654] Call Trace: [ 104.279984] [ 104.280278] dump_stack_lvl+0x91/0xf0 [ 104.280811] print_report+0xcc/0x620 [ 104.281332] ? __virt_addr_valid+0x102/0x340 [ 104.281907] ? vma_interval_tree_remove+0xc75/0xec0 [ 104.282571] ? vma_interval_tree_remove+0xc75/0xec0 [ 104.283233] kasan_report+0xbe/0xf0 [ 104.283742] ? vma_interval_tree_remove+0xc75/0xec0 [ 104.284399] vma_interval_tree_remove+0xc75/0xec0 [ 104.285056] vma_prepare+0xc54/0x11a0 [ 104.285573] __split_vma+0x5af/0x950 [ 104.286069] ? __pfx___split_vma+0x10/0x10 [ 104.286630] ? find_held_lock+0x2c/0x110 [ 104.287195] do_vmi_align_munmap+0x2ba/0x11f0 [ 104.287787] ? lock_is_held_type+0x9f/0x120 [ 104.288362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 104.289030] ? mtree_range_walk+0x632/0x900 [ 104.289615] ? mas_walk+0x5c7/0x7c0 [ 104.290107] do_vmi_munmap+0x1f1/0x2b0 [ 104.290626] mmap_region+0x1f9/0x2660 [ 104.291143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 104.291686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 104.292452] ? __pfx_lock_acquire+0x10/0x10 [ 104.293022] ? __pfx_mmap_region+0x10/0x10 [ 104.293584] ? security_mmap_addr+0x7d/0xa0 [ 104.294157] ? get_unmapped_area+0x1f5/0x3f0 [ 104.294735] do_mmap+0x854/0xf00 [ 104.295199] vm_mmap_pgoff+0x1a6/0x3a0 [ 104.295722] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 104.296310] ksys_mmap_pgoff+0x3af/0x500 [ 104.296855] do_syscall_64+0x3f/0x90 [ 104.297364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.298046] RIP: 0033:0x7fbd45caad82 [ 104.298537] 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 [ 104.300834] RSP: 002b:00007ffc16db57c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 104.301796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd45caad82 [ 104.302696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd450e4000 [ 104.303611] RBP: 00007fbd450e4000 R08: 0000000000000009 R09: 0000000000001000 [ 104.304521] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e32899f60 [ 104.305428] R13: 00007ffc16db57e0 R14: 00007ffc16db5810 R15: 00007ffc16db5b70 [ 104.306349] [ 104.306658] [ 104.306890] Allocated by task 212: [ 104.307349] kasan_save_stack+0x22/0x50 [ 104.307885] kasan_set_track+0x25/0x30 [ 104.308407] __kasan_slab_alloc+0x59/0x70 [ 104.308978] kmem_cache_alloc+0x16b/0x370 [ 104.309533] vm_area_dup+0x20/0x160 [ 104.310018] __split_vma+0x170/0x950 [ 104.310506] split_vma+0xc6/0x110 [ 104.310974] mprotect_fixup+0x8d2/0xb30 [ 104.311508] do_mprotect_pkey+0x87e/0xd40 [ 104.312058] __x64_sys_mprotect+0x78/0xc0 [ 104.312616] do_syscall_64+0x3f/0x90 [ 104.313126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.313805] [ 104.314032] Freed by task 212: [ 104.314453] kasan_save_stack+0x22/0x50 [ 104.314990] kasan_set_track+0x25/0x30 [ 104.315516] kasan_save_free_info+0x2b/0x50 [ 104.316075] __kasan_slab_free+0x10a/0x190 [ 104.316645] kmem_cache_free+0x10d/0x4d0 [ 104.317208] rcu_core+0x8c8/0x2860 [ 104.317690] __do_softirq+0x1b7/0x7d4 [ 104.318199] [ 104.318430] Last potentially related work creation: [ 104.319056] kasan_save_stack+0x22/0x50 [ 104.319589] __kasan_record_aux_stack+0x8e/0xa0 [ 104.320240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 104.320938] remove_vma+0x139/0x170 [ 104.321417] do_vmi_align_munmap+0xd4a/0x11f0 [ 104.322004] do_vmi_munmap+0x1f1/0x2b0 [ 104.322525] __vm_munmap+0x138/0x3a0 [ 104.323010] __x64_sys_munmap+0x59/0x80 [ 104.323548] do_syscall_64+0x3f/0x90 [ 104.324050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.324727] [ 104.324959] The buggy address belongs to the object at ffff88800f5f8ae0 [ 104.324959] which belongs to the cache vm_area_struct of size 168 [ 104.326539] The buggy address is located 88 bytes inside of [ 104.326539] freed 168-byte region [ffff88800f5f8ae0, ffff88800f5f8b88) [ 104.328064] [ 104.328292] The buggy address belongs to the physical page: [ 104.329022] page:00000000cc4b0941 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5f8 [ 104.330173] memcg:ffff88800cf5e001 [ 104.330629] flags: 0x100000000000200(slab|node=0|zone=1) [ 104.331305] page_type: 0xffffffff() [ 104.331789] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 104.332777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf5e001 [ 104.333746] page dumped because: kasan: bad access detected [ 104.334459] [ 104.334687] Memory state around the buggy address: [ 104.335310] ffff88800f5f8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 104.336225] ffff88800f5f8a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 104.337131] >ffff88800f5f8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.338015] ^ [ 104.338656] ffff88800f5f8b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 104.339572] ffff88800f5f8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 104.340461] ================================================================== [ 104.341608] Disabling lock debugging due to kernel taint [ 106.563905] BUG: Bad rss-counter state mm:0000000061e39ee5 type:MM_FILEPAGES val:33 [ 106.564538] BUG: Bad rss-counter state mm:0000000061e39ee5 type:MM_ANONPAGES val:22 [ 106.962019] BUG: Bad rss-counter state mm:00000000b159e4af type:MM_FILEPAGES val:33 [ 106.963064] BUG: Bad rss-counter state mm:00000000b159e4af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5770' (ECDSA) to the list of known hosts. 2023/06/19 17:48:15 fuzzer started 2023/06/19 17:48:15 dialing manager at localhost:44161 2023/06/19 17:48:15 checking machine... 2023/06/19 17:48:15 checking revisions... [ 107.683546] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:48:15 testing simple program... [ 107.736253] cgroup: Unknown subsys name 'net' [ 107.780515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:47:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f218351bbe0 CR3=0000000018026000 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=2035313a38343a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a38343a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f0e7258 RCX=0000000000000001 RDX=1ffff11001e1ce56 RSI=ffff88800f0e7628 RDI=ffffffff818470dc RBP=ffff88800f0e72b0 RSP=ffff88800f0e7240 R8 =0000000000000001 R9 =ffff88800f0e7298 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800f0e7320 R13=0000000000000000 R14=ffff888015d851c0 R15=00000000000928c0 RIP=ffffffff811303b2 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 00007fc403070900 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=00007fc403627618 CR3=000000000e2c6000 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=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