syzkaller login: [ 38.754936] BUG: Bad rss-counter state mm:0000000044bb6594 type:MM_FILEPAGES val:33 [ 38.756707] BUG: Bad rss-counter state mm:0000000044bb6594 type:MM_ANONPAGES val:22 [ 39.007348] ================================================================== [ 39.008352] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.009338] Read of size 8 at addr ffff8880169265c8 by task sshd/219 [ 39.010353] [ 39.010583] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.011524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.012565] Call Trace: [ 39.012900] [ 39.013205] dump_stack_lvl+0x91/0xf0 [ 39.013718] print_report+0xcc/0x620 [ 39.014232] ? __virt_addr_valid+0x102/0x340 [ 39.014807] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.015477] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.016132] kasan_report+0xbe/0xf0 [ 39.016637] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017290] vma_interval_tree_remove+0xc75/0xec0 [ 39.017926] vma_prepare+0xc54/0x11a0 [ 39.018426] __split_vma+0x5af/0x950 [ 39.018925] ? __pfx___split_vma+0x10/0x10 [ 39.019494] ? find_held_lock+0x2c/0x110 [ 39.020048] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.020650] ? lock_is_held_type+0x9f/0x120 [ 39.021217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.021855] ? mtree_range_walk+0x632/0x900 [ 39.022440] ? mas_walk+0x5c7/0x7c0 [ 39.022945] do_vmi_munmap+0x1f1/0x2b0 [ 39.023500] mmap_region+0x1f9/0x2660 [ 39.024011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.024552] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.025308] ? __pfx_lock_acquire+0x10/0x10 [ 39.025872] ? __pfx_mmap_region+0x10/0x10 [ 39.026437] ? security_mmap_addr+0x7d/0xa0 [ 39.027003] ? get_unmapped_area+0x1f5/0x3f0 [ 39.027589] do_mmap+0x854/0xf00 [ 39.028054] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.028588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.029182] ksys_mmap_pgoff+0x3af/0x500 [ 39.029725] do_syscall_64+0x3f/0x90 [ 39.030239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.030931] RIP: 0033:0x7f29b8419d82 [ 39.031439] 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 [ 39.033694] RSP: 002b:00007fffe8a54608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.034651] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29b8419d82 [ 39.035566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29b7853000 [ 39.036454] RBP: 00007f29b7853000 R08: 0000000000000009 R09: 0000000000001000 [ 39.037357] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbc5fa5d90 [ 39.038254] R13: 00007fffe8a54620 R14: 00007fffe8a54650 R15: 00007fffe8a549b0 [ 39.039159] [ 39.039478] [ 39.039708] Allocated by task 212: [ 39.040165] kasan_save_stack+0x22/0x50 [ 39.040701] kasan_set_track+0x25/0x30 [ 39.041228] __kasan_slab_alloc+0x59/0x70 [ 39.041782] kmem_cache_alloc+0x16b/0x370 [ 39.042327] vm_area_dup+0x20/0x160 [ 39.042808] __split_vma+0x170/0x950 [ 39.043313] split_vma+0xc6/0x110 [ 39.043782] mprotect_fixup+0x8d2/0xb30 [ 39.044315] do_mprotect_pkey+0x87e/0xd40 [ 39.044864] __x64_sys_mprotect+0x78/0xc0 [ 39.045414] do_syscall_64+0x3f/0x90 [ 39.045919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.046599] [ 39.046830] Freed by task 210: [ 39.047246] kasan_save_stack+0x22/0x50 [ 39.047803] kasan_set_track+0x25/0x30 [ 39.048321] kasan_save_free_info+0x2b/0x50 [ 39.048889] __kasan_slab_free+0x10a/0x190 [ 39.049452] kmem_cache_free+0x10d/0x4d0 [ 39.049992] rcu_core+0x8c8/0x2860 [ 39.050465] __do_softirq+0x1b7/0x7d4 [ 39.050975] [ 39.051203] Last potentially related work creation: [ 39.051909] kasan_save_stack+0x22/0x50 [ 39.052444] __kasan_record_aux_stack+0x8e/0xa0 [ 39.053046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.053724] remove_vma+0x139/0x170 [ 39.054203] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.054799] do_vmi_munmap+0x1f1/0x2b0 [ 39.055333] __vm_munmap+0x138/0x3a0 [ 39.055824] __x64_sys_munmap+0x59/0x80 [ 39.056351] do_syscall_64+0x3f/0x90 [ 39.056855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.057539] [ 39.057768] The buggy address belongs to the object at ffff888016926570 [ 39.057768] which belongs to the cache vm_area_struct of size 168 [ 39.059330] The buggy address is located 88 bytes inside of [ 39.059330] freed 168-byte region [ffff888016926570, ffff888016926618) [ 39.060805] [ 39.061032] The buggy address belongs to the physical page: [ 39.061732] page:000000001a6ffede refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16926 [ 39.062888] memcg:ffff88800c520801 [ 39.063354] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.064034] page_type: 0xffffffff() [ 39.064512] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ba340 dead000000000004 [ 39.065495] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c520801 [ 39.066458] page dumped because: kasan: bad access detected [ 39.067156] [ 39.067402] Memory state around the buggy address: [ 39.068023] ffff888016926480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.068923] ffff888016926500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.069827] >ffff888016926580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.070720] ^ [ 39.071438] ffff888016926600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 39.072341] ffff888016926680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.073251] ================================================================== [ 39.074300] Disabling lock debugging due to kernel taint [ 41.721010] BUG: Bad rss-counter state mm:000000000b8d9799 type:MM_FILEPAGES val:33 [ 41.722223] BUG: Bad rss-counter state mm:000000000b8d9799 type:MM_ANONPAGES val:22 [ 42.157200] BUG: Bad rss-counter state mm:00000000a207247e type:MM_FILEPAGES val:33 [ 42.158563] BUG: Bad rss-counter state mm:00000000a207247e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29035' (ECDSA) to the list of known hosts. 2023/06/21 03:16:53 fuzzer started 2023/06/21 03:16:53 dialing manager at localhost:36067 2023/06/21 03:16:53 checking machine... 2023/06/21 03:16:53 checking revisions... [ 42.892661] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:16:53 testing simple program... [ 42.949023] cgroup: Unknown subsys name 'net' [ 43.052268] cgroup: Unknown subsys name 'rlimit' executing program executing program [ 50.884657] BUG: Bad rss-counter state mm:00000000a08b15cd type:MM_FILEPAGES val:173 [ 50.885921] BUG: Bad rss-counter state mm:00000000a08b15cd type:MM_ANONPAGES val:50 executing program VM DIAGNOSIS: 03:16:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fcae800 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000002 RDI=ffff88800fcae800 RBP=0000000000000000 RSP=ffff88801463fc80 R8 =ffffffff8199db44 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800d709b40 R13=ffff88800fcae8d0 R14=dffffc0000000000 R15=ffff88800fcae8d0 RIP=ffffffff845239b2 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 00007f08c8d18900 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=00007ffe55b2ece8 CR3=000000000c9bc000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f5c6c9a1c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=8000000017c52067 RCX=0000000000000000 RDX=ffff888015b851c0 RSI=ffffffff81710f06 RDI=0000000000000007 RBP=ffff88801474fd90 RSP=ffff88801474fbf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000000 R13=ffff88800c6d9cb0 R14=00007f9b66d61000 R15=8000000017c52067 RIP=ffffffff814c086b RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9b66da8900 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=00007f9b66d61008 CR3=000000001bc6a000 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