syzkaller login: [ 38.800798] BUG: Bad rss-counter state mm:00000000e3383326 type:MM_FILEPAGES val:33 [ 38.802353] BUG: Bad rss-counter state mm:00000000e3383326 type:MM_ANONPAGES val:22 [ 38.964036] ================================================================== [ 38.964960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.965907] Read of size 8 at addr ffff888017d64d08 by task sshd/225 [ 38.966840] [ 38.967072] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.967926] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.968911] Call Trace: [ 38.969233] [ 38.969521] dump_stack_lvl+0x91/0xf0 [ 38.970015] print_report+0xcc/0x620 [ 38.970509] ? __virt_addr_valid+0x102/0x340 [ 38.971085] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971749] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972452] kasan_report+0xbe/0xf0 [ 38.972997] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973717] vma_interval_tree_remove+0xc75/0xec0 [ 38.974433] vma_prepare+0xc54/0x11a0 [ 38.975008] __split_vma+0x5af/0x950 [ 38.975569] ? __pfx___split_vma+0x10/0x10 [ 38.976200] ? find_held_lock+0x2c/0x110 [ 38.976831] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.977501] ? lock_is_held_type+0x9f/0x120 [ 38.978147] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.978865] ? mtree_range_walk+0x632/0x900 [ 38.979536] ? mas_walk+0x5c7/0x7c0 [ 38.980101] do_vmi_munmap+0x1f1/0x2b0 [ 38.980685] mmap_region+0x1f9/0x2660 [ 38.981266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.981874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.982716] ? __pfx_lock_acquire+0x10/0x10 [ 38.983366] ? __pfx_mmap_region+0x10/0x10 [ 38.983992] ? security_mmap_addr+0x7d/0xa0 [ 38.984621] ? get_unmapped_area+0x1f5/0x3f0 [ 38.985273] do_mmap+0x854/0xf00 [ 38.985812] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.986398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.987072] ksys_mmap_pgoff+0x3af/0x500 [ 38.987678] do_syscall_64+0x3f/0x90 [ 38.988247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989013] RIP: 0033:0x7fa8e6a1fd82 [ 38.989555] 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 [ 38.992115] RSP: 002b:00007ffd788b5058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.993193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8e6a1fd82 [ 38.994210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8e5e59000 [ 38.995236] RBP: 00007fa8e5e59000 R08: 0000000000000009 R09: 0000000000001000 [ 38.996237] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a8df35f70 [ 38.997241] R13: 00007ffd788b5070 R14: 00007ffd788b50a0 R15: 00007ffd788b5400 [ 38.998250] [ 38.998599] [ 38.998850] Allocated by task 218: [ 38.999371] kasan_save_stack+0x22/0x50 [ 38.999964] kasan_set_track+0x25/0x30 [ 39.000548] __kasan_slab_alloc+0x59/0x70 [ 39.001162] kmem_cache_alloc+0x16b/0x370 [ 39.001771] vm_area_dup+0x20/0x160 [ 39.002314] __split_vma+0x170/0x950 [ 39.002860] split_vma+0xc6/0x110 [ 39.003398] mprotect_fixup+0x8d2/0xb30 [ 39.003998] do_mprotect_pkey+0x87e/0xd40 [ 39.004619] __x64_sys_mprotect+0x78/0xc0 [ 39.005232] do_syscall_64+0x3f/0x90 [ 39.005790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.006563] [ 39.006819] Freed by task 218: [ 39.007347] kasan_save_stack+0x22/0x50 [ 39.007946] kasan_set_track+0x25/0x30 [ 39.008529] kasan_save_free_info+0x2b/0x50 [ 39.009160] __kasan_slab_free+0x10a/0x190 [ 39.009795] kmem_cache_free+0x10d/0x4d0 [ 39.010408] rcu_core+0x8c8/0x2860 [ 39.010926] __do_softirq+0x1b7/0x7d4 [ 39.011522] [ 39.011775] Last potentially related work creation: [ 39.012470] kasan_save_stack+0x22/0x50 [ 39.013067] __kasan_record_aux_stack+0x8e/0xa0 [ 39.013752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.014517] remove_vma+0x139/0x170 [ 39.015056] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.015716] do_vmi_munmap+0x1f1/0x2b0 [ 39.016289] __vm_munmap+0x138/0x3a0 [ 39.016837] __x64_sys_munmap+0x59/0x80 [ 39.017426] do_syscall_64+0x3f/0x90 [ 39.017985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018743] [ 39.019005] The buggy address belongs to the object at ffff888017d64cb0 [ 39.019005] which belongs to the cache vm_area_struct of size 168 [ 39.020754] The buggy address is located 88 bytes inside of [ 39.020754] freed 168-byte region [ffff888017d64cb0, ffff888017d64d58) [ 39.022427] [ 39.022687] The buggy address belongs to the physical page: [ 39.023488] page:000000001b3adf42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d64 [ 39.024761] memcg:ffff888019d7d201 [ 39.025256] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.026003] page_type: 0xffffffff() [ 39.026547] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.027627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d7d201 [ 39.028686] page dumped because: kasan: bad access detected [ 39.029467] [ 39.029719] Memory state around the buggy address: [ 39.030398] ffff888017d64c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.031414] ffff888017d64c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.032292] >ffff888017d64d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.033149] ^ [ 39.033591] ffff888017d64d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.034446] ffff888017d64e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.035308] ================================================================== [ 39.036263] Disabling lock debugging due to kernel taint [ 41.428467] BUG: Bad rss-counter state mm:000000002b314bc5 type:MM_FILEPAGES val:33 [ 41.429925] BUG: Bad rss-counter state mm:000000002b314bc5 type:MM_ANONPAGES val:22 [ 41.984746] BUG: Bad rss-counter state mm:000000003ec88ffc type:MM_FILEPAGES val:33 [ 41.985914] BUG: Bad rss-counter state mm:000000003ec88ffc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55555' (ECDSA) to the list of known hosts. 2023/06/20 11:20:43 fuzzer started 2023/06/20 11:20:43 dialing manager at localhost:36067 2023/06/20 11:20:43 checking machine... 2023/06/20 11:20:43 checking revisions... [ 42.662525] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:20:43 testing simple program... [ 42.709083] cgroup: Unknown subsys name 'net' [ 42.755015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:20:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864bf101 RDX=ffffffff85407f48 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffffffff85400000 RSP=ffff88806ce09a68 R8 =ffffffff864bf1b8 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f40 R15=ffff88806ce09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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=00007f5617177180 CR3=000000000c474000 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=f601c3231e7360b63d445baf004b3f4f XMM02=2c67c8bc2e329bc3000000000011aca8 XMM03=fb795ef6d65770560000000000121668 XMM04=879005477b335c2a00000000000ae988 XMM05=6860aeb314f8829d0000000000131ce8 XMM06=75677c7de4a767c40000000000130b50 XMM07=e042d86d42eb936e00000000001218e8 XMM08=cf1f085da309ea83000000000011ad08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000006 RCX=0000000000000000 RDX=ffff8880102c1b40 RSI=ffffffff844bf11a RDI=ffff8880169df568 RBP=ffff8880169df628 RSP=ffff8880169df168 R8 =0000000000000006 R9 =00007fd1e508afff R10=00007fd1e508afff R11=0000555a3f0d8000 R12=ffff8880169df768 R13=00007fd1e508afff R14=dffffc0000000000 R15=00007fd1e508afff RIP=ffffffff844b0822 RFL=00000293 [--S-A-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 00007fd1e5056900 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=00007fd1e5035020 CR3=000000000f2f6000 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=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