syzkaller login: [ 71.940015] BUG: Bad rss-counter state mm:00000000922835a6 type:MM_FILEPAGES val:33 [ 71.941243] BUG: Bad rss-counter state mm:00000000922835a6 type:MM_ANONPAGES val:22 [ 71.983917] ================================================================== [ 71.985360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.986902] Read of size 8 at addr ffff888016b83d08 by task sshd/225 [ 71.988126] [ 71.988477] CPU: 1 PID: 225 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 71.990114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.991695] Call Trace: [ 71.992246] [ 71.992683] dump_stack_lvl+0x91/0xf0 [ 71.993469] print_report+0xcc/0x620 [ 71.994105] ? __virt_addr_valid+0x102/0x340 [ 71.994914] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.995672] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.996432] kasan_report+0xbe/0xf0 [ 71.996998] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.997762] vma_interval_tree_remove+0xc75/0xec0 [ 71.998492] vma_prepare+0xc54/0x11a0 [ 71.999065] __split_vma+0x5af/0x950 [ 71.999630] ? __pfx___split_vma+0x10/0x10 [ 72.000279] ? find_held_lock+0x2c/0x110 [ 72.000907] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.001626] ? lock_is_held_type+0x9f/0x120 [ 72.002284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.003009] ? mtree_range_walk+0x632/0x900 [ 72.003665] ? mas_walk+0x5c7/0x7c0 [ 72.004235] do_vmi_munmap+0x1f1/0x2b0 [ 72.004835] mmap_region+0x1f9/0x2660 [ 72.005429] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.006155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.007275] ? __pfx_lock_acquire+0x10/0x10 [ 72.008098] ? __pfx_mmap_region+0x10/0x10 [ 72.008925] ? security_mmap_addr+0x7d/0xa0 [ 72.009762] ? get_unmapped_area+0x1f5/0x3f0 [ 72.010602] do_mmap+0x854/0xf00 [ 72.011279] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.012058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.012933] ksys_mmap_pgoff+0x3af/0x500 [ 72.013755] do_syscall_64+0x3f/0x90 [ 72.014504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.015513] RIP: 0033:0x7fbf9677dd82 [ 72.016226] 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 [ 72.019559] RSP: 002b:00007fffbf9cc3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.020978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf9677dd82 [ 72.022295] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf95bb7000 [ 72.023604] RBP: 00007fbf95bb7000 R08: 0000000000000009 R09: 0000000000001000 [ 72.024930] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dc681ef70 [ 72.026067] R13: 00007fffbf9cc3c0 R14: 00007fffbf9cc3f0 R15: 00007fffbf9cc750 [ 72.027060] [ 72.027399] [ 72.027648] Allocated by task 218: [ 72.028144] kasan_save_stack+0x22/0x50 [ 72.028725] kasan_set_track+0x25/0x30 [ 72.029305] __kasan_slab_alloc+0x59/0x70 [ 72.029922] kmem_cache_alloc+0x16b/0x370 [ 72.030517] vm_area_dup+0x20/0x160 [ 72.031042] __split_vma+0x170/0x950 [ 72.031573] split_vma+0xc6/0x110 [ 72.032076] mprotect_fixup+0x8d2/0xb30 [ 72.032646] do_mprotect_pkey+0x87e/0xd40 [ 72.033253] __x64_sys_mprotect+0x78/0xc0 [ 72.033848] do_syscall_64+0x3f/0x90 [ 72.034390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.035121] [ 72.035369] Freed by task 218: [ 72.035811] kasan_save_stack+0x22/0x50 [ 72.036383] kasan_set_track+0x25/0x30 [ 72.036950] kasan_save_free_info+0x2b/0x50 [ 72.037583] __kasan_slab_free+0x10a/0x190 [ 72.038197] kmem_cache_free+0x10d/0x4d0 [ 72.038786] rcu_core+0x8c8/0x2860 [ 72.039298] __do_softirq+0x1b7/0x7d4 [ 72.039834] [ 72.040082] Last potentially related work creation: [ 72.040750] kasan_save_stack+0x22/0x50 [ 72.041328] __kasan_record_aux_stack+0x8e/0xa0 [ 72.041986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.042721] remove_vma+0x139/0x170 [ 72.043247] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.043882] do_vmi_munmap+0x1f1/0x2b0 [ 72.044433] __vm_munmap+0x138/0x3a0 [ 72.044966] __x64_sys_munmap+0x59/0x80 [ 72.045546] do_syscall_64+0x3f/0x90 [ 72.046080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.046807] [ 72.047051] The buggy address belongs to the object at ffff888016b83cb0 [ 72.047051] which belongs to the cache vm_area_struct of size 168 [ 72.048714] The buggy address is located 88 bytes inside of [ 72.048714] freed 168-byte region [ffff888016b83cb0, ffff888016b83d58) [ 72.050318] [ 72.050563] The buggy address belongs to the physical page: [ 72.051303] page:000000006c90ad18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b83 [ 72.052546] memcg:ffff88800e18d001 [ 72.053023] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.053765] page_type: 0xffffffff() [ 72.054277] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 72.055320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e18d001 [ 72.056337] page dumped because: kasan: bad access detected [ 72.057097] [ 72.057340] Memory state around the buggy address: [ 72.057990] ffff888016b83c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 72.058951] ffff888016b83c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 72.059908] >ffff888016b83d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 72.060867] ^ [ 72.061368] ffff888016b83d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 72.062330] ffff888016b83e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 72.063282] ================================================================== [ 72.064387] Disabling lock debugging due to kernel taint [ 74.131949] BUG: Bad rss-counter state mm:000000000c927573 type:MM_FILEPAGES val:33 [ 74.133115] BUG: Bad rss-counter state mm:000000000c927573 type:MM_ANONPAGES val:22 [ 74.505921] BUG: Bad rss-counter state mm:00000000931394be type:MM_FILEPAGES val:33 [ 74.507863] BUG: Bad rss-counter state mm:00000000931394be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50057' (ECDSA) to the list of known hosts. 2023/06/19 14:50:51 fuzzer started 2023/06/19 14:50:51 dialing manager at localhost:44161 2023/06/19 14:50:51 checking machine... 2023/06/19 14:50:51 checking revisions... [ 75.230335] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:50:51 testing simple program... [ 75.280005] cgroup: Unknown subsys name 'net' [ 75.317666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880165d7388 RCX=ffffffff86096756 RDX=1ffff11002cbae71 RSI=ffff8880165d7380 RDI=ffff8880165d7388 RBP=ffff8880165d7380 RSP=ffff8880165d7290 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff8880165d73d0 R14=ffff8880165d7388 R15=ffff8880165d7388 RIP=ffffffff81130416 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 00007f4302cc4900 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=00007f430327b618 CR3=0000000008ee2000 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=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 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=0000000000000001 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=00007fa8ea936000 CR3=000000000cc70000 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=5383f912f7fecb942a49d054675092fc XMM02=2c67c8bc2e329bc30000000000121d70 XMM03=fb795ef6d65770560000000000128b20 XMM04=c0db1f72089cacd500000000000ae988 XMM05=e7a3b750822471340000000000138a18 XMM06=0531e1e50d1126480000000000137bf0 XMM07=e042d86d42eb936e0000000000128df8 XMM08=d2f06b583a2bf04e0000000000121dd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000