syzkaller login: [ 34.222633] BUG: Bad rss-counter state mm:00000000720760f1 type:MM_FILEPAGES val:33 [ 34.223785] BUG: Bad rss-counter state mm:00000000720760f1 type:MM_ANONPAGES val:22 [ 34.261969] ================================================================== [ 34.262980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.263920] Read of size 8 at addr ffff88800d871d08 by task sshd/219 [ 34.264704] [ 34.264923] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.265793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.266778] Call Trace: [ 34.267101] <TASK> [ 34.267385] dump_stack_lvl+0x91/0xf0 [ 34.267872] print_report+0xcc/0x620 [ 34.268363] ? __virt_addr_valid+0x102/0x340 [ 34.268937] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.269557] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.270163] kasan_report+0xbe/0xf0 [ 34.270632] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.271274] vma_interval_tree_remove+0xc75/0xec0 [ 34.271882] vma_prepare+0xc54/0x11a0 [ 34.272362] __split_vma+0x5af/0x950 [ 34.272846] ? __pfx___split_vma+0x10/0x10 [ 34.273380] ? find_held_lock+0x2c/0x110 [ 34.273900] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.274467] ? lock_is_held_type+0x9f/0x120 [ 34.275009] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.275615] ? mtree_range_walk+0x632/0x900 [ 34.276166] ? mas_walk+0x5c7/0x7c0 [ 34.276653] do_vmi_munmap+0x1f1/0x2b0 [ 34.277150] mmap_region+0x1f9/0x2660 [ 34.277632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.278148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.278866] ? __pfx_lock_acquire+0x10/0x10 [ 34.279410] ? __pfx_mmap_region+0x10/0x10 [ 34.279948] ? security_mmap_addr+0x7d/0xa0 [ 34.280494] ? get_unmapped_area+0x1f5/0x3f0 [ 34.281039] do_mmap+0x854/0xf00 [ 34.281487] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.281985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.282549] ksys_mmap_pgoff+0x3af/0x500 [ 34.283060] do_syscall_64+0x3f/0x90 [ 34.283540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.284199] RIP: 0033:0x7f719f466d82 [ 34.284665] 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 [ 34.286783] RSP: 002b:00007fff74a31148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.287687] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f719f466d82 [ 34.288556] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f719e8a0000 [ 34.289400] RBP: 00007f719e8a0000 R08: 0000000000000009 R09: 0000000000001000 [ 34.290242] R10: 0000000000000812 R11: 0000000000000206 R12: 000055855cb74b20 [ 34.291081] R13: 00007fff74a31160 R14: 00007fff74a31190 R15: 00007fff74a314f0 [ 34.291943] </TASK> [ 34.292236] [ 34.292460] Allocated by task 212: [ 34.292889] kasan_save_stack+0x22/0x50 [ 34.293388] kasan_set_track+0x25/0x30 [ 34.293877] __kasan_slab_alloc+0x59/0x70 [ 34.294400] kmem_cache_alloc+0x16b/0x370 [ 34.294914] vm_area_dup+0x20/0x160 [ 34.295372] __split_vma+0x170/0x950 [ 34.295838] split_vma+0xc6/0x110 [ 34.296276] mprotect_fixup+0x8d2/0xb30 [ 34.296786] do_mprotect_pkey+0x87e/0xd40 [ 34.297311] __x64_sys_mprotect+0x78/0xc0 [ 34.297828] do_syscall_64+0x3f/0x90 [ 34.298303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.298948] [ 34.299164] Freed by task 212: [ 34.299550] kasan_save_stack+0x22/0x50 [ 34.300054] kasan_set_track+0x25/0x30 [ 34.300562] kasan_save_free_info+0x2b/0x50 [ 34.301096] __kasan_slab_free+0x10a/0x190 [ 34.301631] kmem_cache_free+0x10d/0x4d0 [ 34.302140] rcu_core+0x8c8/0x2860 [ 34.302587] __do_softirq+0x1b7/0x7d4 [ 34.303060] [ 34.303274] Last potentially related work creation: [ 34.303855] kasan_save_stack+0x22/0x50 [ 34.304360] __kasan_record_aux_stack+0x8e/0xa0 [ 34.304944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.305585] remove_vma+0x139/0x170 [ 34.306035] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.306598] do_vmi_munmap+0x1f1/0x2b0 [ 34.307090] __vm_munmap+0x138/0x3a0 [ 34.307559] __x64_sys_munmap+0x59/0x80 [ 34.308050] do_syscall_64+0x3f/0x90 [ 34.308542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.309189] [ 34.309404] Second to last potentially related work creation: [ 34.310088] kasan_save_stack+0x22/0x50 [ 34.310591] __kasan_record_aux_stack+0x8e/0xa0 [ 34.311166] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.311803] remove_vma+0x139/0x170 [ 34.312251] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.312834] do_vmi_munmap+0x1f1/0x2b0 [ 34.313326] __vm_munmap+0x138/0x3a0 [ 34.313797] __x64_sys_munmap+0x59/0x80 [ 34.314298] do_syscall_64+0x3f/0x90 [ 34.314779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.315423] [ 34.315640] The buggy address belongs to the object at ffff88800d871cb0 [ 34.315640] which belongs to the cache vm_area_struct of size 168 [ 34.317098] The buggy address is located 88 bytes inside of [ 34.317098] freed 168-byte region [ffff88800d871cb0, ffff88800d871d58) [ 34.318504] [ 34.318722] The buggy address belongs to the physical page: [ 34.319378] page:00000000724d037d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd871 [ 34.320475] memcg:ffff88800dcb8a01 [ 34.320899] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.321541] page_type: 0xffffffff() [ 34.321991] raw: 0100000000000200 ffff88800879fc80 ffffea000037eac0 dead000000000006 [ 34.322905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcb8a01 [ 34.323805] page dumped because: kasan: bad access detected [ 34.324480] [ 34.324694] Memory state around the buggy address: [ 34.325276] ffff88800d871c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.326131] ffff88800d871c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.326977] >ffff88800d871d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.327830] ^ [ 34.328269] ffff88800d871d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.329132] ffff88800d871e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.329973] ================================================================== [ 34.330941] Disabling lock debugging due to kernel taint [ 37.056726] BUG: Bad rss-counter state mm:00000000c370974e type:MM_FILEPAGES val:33 [ 37.057711] BUG: Bad rss-counter state mm:00000000c370974e type:MM_ANONPAGES val:22 [ 37.574358] BUG: Bad rss-counter state mm:0000000048608dfa type:MM_FILEPAGES val:33 [ 37.575692] BUG: Bad rss-counter state mm:0000000048608dfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25377' (ECDSA) to the list of known hosts. 2023/06/20 00:58:08 fuzzer started 2023/06/20 00:58:08 dialing manager at localhost:44161 2023/06/20 00:58:08 checking machine... 2023/06/20 00:58:08 checking revisions... [ 38.339978] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:58:09 testing simple program... [ 38.391605] cgroup: Unknown subsys name 'net' [ 38.433212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:04 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09918 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180eff3 RFL=00000283 [--S---C] 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=00007f2c56ee9060 CR3=000000000e396000 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=2038303a38353a3030203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303732383320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a38353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019c3ff58 RCX=0000000000000000 RDX=ffff88800f621b40 RSI=ffffffff8363e815 RDI=0000000000000005 RBP=ffff888019c3ff48 RSP=ffff888019c3ff20 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888019c3ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363e9e3 RFL=00000286 [--S--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 00007f1e1ce06900 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=00007f1e1d3bd618 CR3=0000000006b0c000 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