syzkaller login: [ 50.052356] BUG: Bad rss-counter state mm:0000000094ee9d1a type:MM_FILEPAGES val:33 [ 50.053388] BUG: Bad rss-counter state mm:0000000094ee9d1a type:MM_ANONPAGES val:22 [ 50.217558] ================================================================== [ 50.218628] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.219725] Read of size 8 at addr ffff88800d983d08 by task sshd/221 [ 50.220780] [ 50.221000] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.221862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.222850] Call Trace: [ 50.223170] [ 50.223453] dump_stack_lvl+0x91/0xf0 [ 50.223956] print_report+0xcc/0x620 [ 50.224443] ? __virt_addr_valid+0x102/0x340 [ 50.224991] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.225610] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.226226] kasan_report+0xbe/0xf0 [ 50.226706] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.227339] vma_interval_tree_remove+0xc75/0xec0 [ 50.227963] vma_prepare+0xc54/0x11a0 [ 50.228455] __split_vma+0x5af/0x950 [ 50.228924] ? __pfx___split_vma+0x10/0x10 [ 50.229459] ? find_held_lock+0x2c/0x110 [ 50.229988] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.230570] ? lock_is_held_type+0x9f/0x120 [ 50.231108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.231725] ? mtree_range_walk+0x632/0x900 [ 50.232308] ? mas_walk+0x5c7/0x7c0 [ 50.232785] do_vmi_munmap+0x1f1/0x2b0 [ 50.233284] mmap_region+0x1f9/0x2660 [ 50.233771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.234282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.235002] ? __pfx_lock_acquire+0x10/0x10 [ 50.235552] ? __pfx_mmap_region+0x10/0x10 [ 50.236091] ? security_mmap_addr+0x7d/0xa0 [ 50.236632] ? get_unmapped_area+0x1f5/0x3f0 [ 50.237186] do_mmap+0x854/0xf00 [ 50.237635] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.238131] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.238706] ksys_mmap_pgoff+0x3af/0x500 [ 50.239209] do_syscall_64+0x3f/0x90 [ 50.239694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.240362] RIP: 0033:0x7f179dcfed82 [ 50.240820] 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 [ 50.242982] RSP: 002b:00007ffc7b983678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.243916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f179dcfed82 [ 50.244777] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f179d138000 [ 50.245638] RBP: 00007f179d138000 R08: 0000000000000009 R09: 0000000000001000 [ 50.246503] R10: 0000000000000812 R11: 0000000000000206 R12: 000056173cbc5ec0 [ 50.247367] R13: 00007ffc7b983690 R14: 00007ffc7b9836c0 R15: 00007ffc7b983a20 [ 50.248237] [ 50.248536] [ 50.248754] Allocated by task 214: [ 50.249189] kasan_save_stack+0x22/0x50 [ 50.249703] kasan_set_track+0x25/0x30 [ 50.250202] __kasan_slab_alloc+0x59/0x70 [ 50.250728] kmem_cache_alloc+0x16b/0x370 [ 50.251244] vm_area_dup+0x20/0x160 [ 50.251706] __split_vma+0x170/0x950 [ 50.252187] split_vma+0xc6/0x110 [ 50.252638] mprotect_fixup+0x8d2/0xb30 [ 50.253145] do_mprotect_pkey+0x87e/0xd40 [ 50.253671] __x64_sys_mprotect+0x78/0xc0 [ 50.254206] do_syscall_64+0x3f/0x90 [ 50.254678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.255328] [ 50.255542] Freed by task 204: [ 50.255961] kasan_save_stack+0x22/0x50 [ 50.256463] kasan_set_track+0x25/0x30 [ 50.256968] kasan_save_free_info+0x2b/0x50 [ 50.257504] __kasan_slab_free+0x10a/0x190 [ 50.258037] kmem_cache_free+0x10d/0x4d0 [ 50.258544] rcu_core+0x8c8/0x2860 [ 50.258989] __do_softirq+0x1b7/0x7d4 [ 50.259475] [ 50.259694] Last potentially related work creation: [ 50.260295] kasan_save_stack+0x22/0x50 [ 50.260803] __kasan_record_aux_stack+0x8e/0xa0 [ 50.261378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.262091] remove_vma+0x139/0x170 [ 50.262548] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.263107] do_vmi_munmap+0x1f1/0x2b0 [ 50.263594] __vm_munmap+0x138/0x3a0 [ 50.264091] __x64_sys_munmap+0x59/0x80 [ 50.264593] do_syscall_64+0x3f/0x90 [ 50.265067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.265722] [ 50.265939] The buggy address belongs to the object at ffff88800d983cb0 [ 50.265939] which belongs to the cache vm_area_struct of size 168 [ 50.267418] The buggy address is located 88 bytes inside of [ 50.267418] freed 168-byte region [ffff88800d983cb0, ffff88800d983d58) [ 50.268837] [ 50.269055] The buggy address belongs to the physical page: [ 50.269728] page:00000000b98c0528 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd983 [ 50.270816] memcg:ffff88800fc69301 [ 50.271239] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.271961] page_type: 0xffffffff() [ 50.272414] raw: 0100000000000200 ffff88800879fc80 ffffea00003d8f80 dead000000000007 [ 50.273334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc69301 [ 50.274245] page dumped because: kasan: bad access detected [ 50.274919] [ 50.275134] Memory state around the buggy address: [ 50.275726] ffff88800d983c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 50.276594] ffff88800d983c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 50.277464] >ffff88800d983d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 50.278324] ^ [ 50.278759] ffff88800d983d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.279632] ffff88800d983e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 50.280500] ================================================================== [ 50.281418] Disabling lock debugging due to kernel taint [ 52.170263] BUG: Bad rss-counter state mm:000000002b7e6e53 type:MM_FILEPAGES val:33 [ 52.171059] BUG: Bad rss-counter state mm:000000002b7e6e53 type:MM_ANONPAGES val:22 [ 52.563036] BUG: Bad rss-counter state mm:00000000bca86f40 type:MM_FILEPAGES val:33 [ 52.563855] BUG: Bad rss-counter state mm:00000000bca86f40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55079' (ECDSA) to the list of known hosts. 2023/06/19 12:28:22 fuzzer started 2023/06/19 12:28:23 dialing manager at localhost:44161 2023/06/19 12:28:23 checking machine... 2023/06/19 12:28:23 checking revisions... [ 53.199865] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:28:23 testing simple program... [ 53.247920] cgroup: Unknown subsys name 'net' [ 53.310044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:28:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ed2f1a0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff844bd575 RDI=ffff88800ed2f1ac RBP=0000000000000004 RSP=ffff88800ed2f0b8 R8 =0000000000000001 R9 =ffff88800ed2f118 R10=0000000000038001 R11=00000000000b3e2e R12=ffff88800ed2f1a0 R13=0000000000000000 R14=ffff888010329b40 R15=ffff88800d25fe40 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 00007f2e5d9a0900 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=00007f2e5d96a008 CR3=000000001a28e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000200 RBX=ffff88800e732850 RCX=ffff88806cb61800 RDX=0000000000000000 RSI=ffff88800e732850 RDI=ffffffff818105a7 RBP=ffff88800844f780 RSP=ffff88806cf09de8 R8 =0000000028b3ac31 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000200 R13=ffffea000039cc80 R14=ffffffff813782a8 R15=ffff88800e7328d0 RIP=ffffffff8153432b 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 =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=00007f5eebc1e450 CR3=0000000009674000 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=2032323a38323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a38323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000