syzkaller login: [ 31.959592] BUG: Bad rss-counter state mm:0000000053cb76ea type:MM_FILEPAGES val:33 [ 31.960790] BUG: Bad rss-counter state mm:0000000053cb76ea type:MM_ANONPAGES val:22 [ 32.000213] ================================================================== [ 32.001196] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.002127] Read of size 8 at addr ffff88800e7cd058 by task sshd/220 [ 32.002883] [ 32.003097] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.003949] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.004912] Call Trace: [ 32.005247] [ 32.005534] dump_stack_lvl+0x91/0xf0 [ 32.006022] print_report+0xcc/0x620 [ 32.006503] ? __virt_addr_valid+0x102/0x340 [ 32.007055] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.007673] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.008279] kasan_report+0xbe/0xf0 [ 32.008748] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.009382] vma_interval_tree_remove+0xc75/0xec0 [ 32.009981] vma_prepare+0xc54/0x11a0 [ 32.010460] __split_vma+0x5af/0x950 [ 32.010933] ? __pfx___split_vma+0x10/0x10 [ 32.011458] ? find_held_lock+0x2c/0x110 [ 32.011971] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.012534] ? lock_is_held_type+0x9f/0x120 [ 32.013070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.013695] ? mtree_range_walk+0x632/0x900 [ 32.014247] ? mas_walk+0x5c7/0x7c0 [ 32.014714] do_vmi_munmap+0x1f1/0x2b0 [ 32.015206] mmap_region+0x1f9/0x2660 [ 32.015684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.016190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.016893] ? __pfx_lock_acquire+0x10/0x10 [ 32.017430] ? __pfx_mmap_region+0x10/0x10 [ 32.017955] ? security_mmap_addr+0x7d/0xa0 [ 32.018480] ? get_unmapped_area+0x1f5/0x3f0 [ 32.019024] do_mmap+0x854/0xf00 [ 32.019458] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.019956] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.020511] ksys_mmap_pgoff+0x3af/0x500 [ 32.021012] do_syscall_64+0x3f/0x90 [ 32.021492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.022134] RIP: 0033:0x7fc6e717ad82 [ 32.022594] 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 [ 32.024705] RSP: 002b:00007ffe8400c6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.025623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6e717ad82 [ 32.026462] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6e65b4000 [ 32.027309] RBP: 00007fc6e65b4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.028148] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594d41eab20 [ 32.028987] R13: 00007ffe8400c6c0 R14: 00007ffe8400c6f0 R15: 00007ffe8400ca50 [ 32.029847] [ 32.030140] [ 32.030358] Allocated by task 212: [ 32.030784] kasan_save_stack+0x22/0x50 [ 32.031292] kasan_set_track+0x25/0x30 [ 32.031788] __kasan_slab_alloc+0x59/0x70 [ 32.032307] kmem_cache_alloc+0x16b/0x370 [ 32.032826] vm_area_dup+0x20/0x160 [ 32.033280] __split_vma+0x170/0x950 [ 32.033742] split_vma+0xc6/0x110 [ 32.034176] mprotect_fixup+0x8d2/0xb30 [ 32.034672] do_mprotect_pkey+0x87e/0xd40 [ 32.035188] __x64_sys_mprotect+0x78/0xc0 [ 32.035708] do_syscall_64+0x3f/0x90 [ 32.036260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.036900] [ 32.037114] Freed by task 212: [ 32.037508] kasan_save_stack+0x22/0x50 [ 32.038010] kasan_set_track+0x25/0x30 [ 32.038531] kasan_save_free_info+0x2b/0x50 [ 32.039092] __kasan_slab_free+0x10a/0x190 [ 32.039628] kmem_cache_free+0x10d/0x4d0 [ 32.040137] rcu_core+0x8c8/0x2860 [ 32.040583] __do_softirq+0x1b7/0x7d4 [ 32.041058] [ 32.041275] Last potentially related work creation: [ 32.041866] kasan_save_stack+0x22/0x50 [ 32.042372] __kasan_record_aux_stack+0x8e/0xa0 [ 32.042951] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.043608] remove_vma+0x139/0x170 [ 32.044062] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.044626] do_vmi_munmap+0x1f1/0x2b0 [ 32.045122] __vm_munmap+0x138/0x3a0 [ 32.045608] __x64_sys_munmap+0x59/0x80 [ 32.046111] do_syscall_64+0x3f/0x90 [ 32.046591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.047235] [ 32.047452] The buggy address belongs to the object at ffff88800e7cd000 [ 32.047452] which belongs to the cache vm_area_struct of size 168 [ 32.048940] The buggy address is located 88 bytes inside of [ 32.048940] freed 168-byte region [ffff88800e7cd000, ffff88800e7cd0a8) [ 32.050358] [ 32.050584] The buggy address belongs to the physical page: [ 32.051250] page:0000000087653392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7cd [ 32.052326] memcg:ffff88800e828e01 [ 32.052750] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.053464] page_type: 0xffffffff() [ 32.053916] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.054829] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e828e01 [ 32.055745] page dumped because: kasan: bad access detected [ 32.056417] [ 32.056632] Memory state around the buggy address: [ 32.057220] ffff88800e7ccf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.058079] ffff88800e7ccf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.058956] >ffff88800e7cd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.059813] ^ [ 32.060541] ffff88800e7cd080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.061423] ffff88800e7cd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.062277] ================================================================== [ 32.063389] Disabling lock debugging due to kernel taint [ 33.980109] BUG: Bad rss-counter state mm:000000003afdf5a4 type:MM_FILEPAGES val:33 [ 33.981126] BUG: Bad rss-counter state mm:000000003afdf5a4 type:MM_ANONPAGES val:22 [ 34.454832] BUG: Bad rss-counter state mm:00000000f9c95640 type:MM_FILEPAGES val:33 [ 34.455932] BUG: Bad rss-counter state mm:00000000f9c95640 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45836' (ECDSA) to the list of known hosts. 2023/06/19 20:57:51 fuzzer started 2023/06/19 20:57:51 dialing manager at localhost:44161 2023/06/19 20:57:51 checking machine... 2023/06/19 20:57:51 checking revisions... [ 35.163376] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:51 testing simple program... [ 35.209427] cgroup: Unknown subsys name 'net' [ 35.261144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:48 Registers: info registers vcpu 0 RAX=00007fff999dee20 RBX=00000000000000e1 RCX=00007fff999e0500 RDX=00007fff999e1100 RSI=0000000000000000 RDI=00007fff999dee20 RBP=00000000000000f4 RSP=00007fff999dede8 R8 =00007fff999e34c4 R9 =00007fff999e3380 R10=00007ff852787a57 R11=0000000000000000 R12=0000000000000008 R13=00007fff999dee20 R14=00007fff999e35f0 R15=0000000000000452 RIP=00007ff85218dfe5 RFL=00000206 [-----P-] 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 00007ff851c37900 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=00007fff999e0000 CR3=000000000e744000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=e09f93f09f5959e439435757c6344d50 XMM05=00000000000000000000000000000000 XMM06=737365636359593d3943572068344d3d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fe0a89b8fb0 CR3=000000000c5d2000 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=10518a239415f08a474a76705fc46dbc XMM02=000000000011ecc0ec2efd57dc4c00df XMM03=00000000001231787fa5811e6797eab2 XMM04=7ea612599ef5c90600000000000ae988 XMM05=693fbbbd036429120000000000134340 XMM06=4fda316b135da52b00000000001333e0 XMM07=e042d86d42eb936e00000000001233f8 XMM08=7fa5811e6797eab2000000000011ed20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000