syzkaller login: [ 28.663843] BUG: Bad rss-counter state mm:00000000cf0b737c type:MM_FILEPAGES val:33 [ 28.665732] BUG: Bad rss-counter state mm:00000000cf0b737c type:MM_ANONPAGES val:22 [ 28.872715] ================================================================== [ 28.873620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.874569] Read of size 8 at addr ffff88800ed4c058 by task sshd/221 [ 28.875353] [ 28.875571] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.876662] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.877691] Call Trace: [ 28.878027] [ 28.878327] dump_stack_lvl+0x91/0xf0 [ 28.878871] print_report+0xcc/0x620 [ 28.879383] ? __virt_addr_valid+0x102/0x340 [ 28.879958] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.880610] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.881257] kasan_report+0xbe/0xf0 [ 28.881754] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882430] vma_interval_tree_remove+0xc75/0xec0 [ 28.883064] vma_prepare+0xc54/0x11a0 [ 28.883559] __split_vma+0x5af/0x950 [ 28.884060] ? __pfx___split_vma+0x10/0x10 [ 28.884621] ? find_held_lock+0x2c/0x110 [ 28.885162] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.885748] ? lock_is_held_type+0x9f/0x120 [ 28.886304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.886948] ? mtree_range_walk+0x632/0x900 [ 28.887526] ? mas_walk+0x5c7/0x7c0 [ 28.888021] do_vmi_munmap+0x1f1/0x2b0 [ 28.888532] mmap_region+0x1f9/0x2660 [ 28.889028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.889564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.890309] ? __pfx_lock_acquire+0x10/0x10 [ 28.890889] ? __pfx_mmap_region+0x10/0x10 [ 28.891445] ? security_mmap_addr+0x7d/0xa0 [ 28.891998] ? get_unmapped_area+0x1f5/0x3f0 [ 28.892570] do_mmap+0x854/0xf00 [ 28.893022] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.893540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.894121] ksys_mmap_pgoff+0x3af/0x500 [ 28.894656] do_syscall_64+0x3f/0x90 [ 28.895162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.895840] RIP: 0033:0x7fd6a97a0d82 [ 28.896314] 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 [ 28.898579] RSP: 002b:00007ffc9322f198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.899528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6a97a0d82 [ 28.900414] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6a8bda000 [ 28.901303] RBP: 00007fd6a8bda000 R08: 0000000000000009 R09: 0000000000001000 [ 28.902184] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582b32beec0 [ 28.903079] R13: 00007ffc9322f1b0 R14: 00007ffc9322f1e0 R15: 00007ffc9322f540 [ 28.903973] [ 28.904277] [ 28.904498] Allocated by task 212: [ 28.904942] kasan_save_stack+0x22/0x50 [ 28.905468] kasan_set_track+0x25/0x30 [ 28.905984] __kasan_slab_alloc+0x59/0x70 [ 28.906547] kmem_cache_alloc+0x16b/0x370 [ 28.907085] vm_area_dup+0x20/0x160 [ 28.907555] __split_vma+0x170/0x950 [ 28.908038] split_vma+0xc6/0x110 [ 28.908496] mprotect_fixup+0x8d2/0xb30 [ 28.909017] do_mprotect_pkey+0x87e/0xd40 [ 28.909558] __x64_sys_mprotect+0x78/0xc0 [ 28.910103] do_syscall_64+0x3f/0x90 [ 28.910618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.911300] [ 28.911526] Freed by task 13: [ 28.911927] kasan_save_stack+0x22/0x50 [ 28.912453] kasan_set_track+0x25/0x30 [ 28.912976] kasan_save_free_info+0x2b/0x50 [ 28.913539] __kasan_slab_free+0x10a/0x190 [ 28.914094] kmem_cache_free+0x10d/0x4d0 [ 28.914640] rcu_core+0x8c8/0x2860 [ 28.915110] __do_softirq+0x1b7/0x7d4 [ 28.915616] [ 28.915840] Last potentially related work creation: [ 28.916466] kasan_save_stack+0x22/0x50 [ 28.916991] __kasan_record_aux_stack+0x8e/0xa0 [ 28.917643] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.918322] remove_vma+0x139/0x170 [ 28.918810] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.919422] do_vmi_munmap+0x1f1/0x2b0 [ 28.919918] __vm_munmap+0x138/0x3a0 [ 28.920390] __x64_sys_munmap+0x59/0x80 [ 28.920899] do_syscall_64+0x3f/0x90 [ 28.921374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922015] [ 28.922235] The buggy address belongs to the object at ffff88800ed4c000 [ 28.922235] which belongs to the cache vm_area_struct of size 168 [ 28.923724] The buggy address is located 88 bytes inside of [ 28.923724] freed 168-byte region [ffff88800ed4c000, ffff88800ed4c0a8) [ 28.925134] [ 28.925347] The buggy address belongs to the physical page: [ 28.926014] page:00000000bf233839 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed4c [ 28.927161] memcg:ffff888009421401 [ 28.927589] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.928298] page_type: 0xffffffff() [ 28.928746] raw: 0100000000000200 ffff8880087a0c80 ffffea000033a4c0 dead000000000005 [ 28.929673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009421401 [ 28.930587] page dumped because: kasan: bad access detected [ 28.931250] [ 28.931473] Memory state around the buggy address: [ 28.932048] ffff88800ed4bf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.932900] ffff88800ed4bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.933754] >ffff88800ed4c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.934626] ^ [ 28.935346] ffff88800ed4c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.936202] ffff88800ed4c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.937058] ================================================================== [ 28.938000] Disabling lock debugging due to kernel taint [ 30.927476] BUG: Bad rss-counter state mm:000000000d10b580 type:MM_FILEPAGES val:33 [ 30.928683] BUG: Bad rss-counter state mm:000000000d10b580 type:MM_ANONPAGES val:22 [ 31.361714] BUG: Bad rss-counter state mm:000000007b954d8a type:MM_FILEPAGES val:33 [ 31.362976] BUG: Bad rss-counter state mm:000000007b954d8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10820' (ECDSA) to the list of known hosts. 2023/06/21 06:41:03 fuzzer started 2023/06/21 06:41:04 dialing manager at localhost:36067 2023/06/21 06:41:04 checking machine... 2023/06/21 06:41:04 checking revisions... [ 32.072980] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:41:04 testing simple program... [ 32.125315] cgroup: Unknown subsys name 'net' [ 32.173584] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:03 Registers: info registers vcpu 0 RAX=fffffffffb5b701e RBX=ffffffff85db9a08 RCX=ffffffff81370a89 RDX=0000000000000000 RSI=ffffffff860d2550 RDI=ffffffff85db99f4 RBP=ffffffff85db99f4 RSP=ffff8880180b75c8 R8 =ffffffff860d2550 R9 =ffff8880180b76c0 R10=0000000000038001 R11=000000000000fc0c R12=ffffffff85db9a20 R13=ffffffff85db99f4 R14=ffffffff85db99f4 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f43f5660900 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=00007ffd5e2d2000 CR3=000000000c592000 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=6720646572637465733a4d41503d706f 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=1ffffffff0c1a5fb RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d2fe0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff81130b73 RFL=00000213 [----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 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=00007f9e781a5510 CR3=000000000c760000 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=a730f6d79a01aa85144743105c2ec7c6 XMM02=2c67c8bc2e329bc3000000000011af48 XMM03=fb795ef6d65770560000000000121500 XMM04=da337a4a28e6d64500000000000ae988 XMM05=19e9129bd510f2350000000000131b70 XMM06=4fda316b135da52b00000000001319f8 XMM07=e042d86d42eb936e0000000000121780 XMM08=659cf91c94ec4379000000000011afa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000