syzkaller login: [ 38.797635] BUG: Bad rss-counter state mm:000000008f031375 type:MM_FILEPAGES val:33 [ 38.799376] BUG: Bad rss-counter state mm:000000008f031375 type:MM_ANONPAGES val:22 [ 38.974665] ================================================================== [ 38.975697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.976732] Read of size 8 at addr ffff88800f8ebed8 by task sshd/225 [ 38.977634] [ 38.977913] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.978862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.979970] Call Trace: [ 38.980321] [ 38.980633] dump_stack_lvl+0x91/0xf0 [ 38.981174] print_report+0xcc/0x620 [ 38.981709] ? __virt_addr_valid+0x102/0x340 [ 38.982316] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.983024] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.983700] kasan_report+0xbe/0xf0 [ 38.984220] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.984908] vma_interval_tree_remove+0xc75/0xec0 [ 38.985570] vma_prepare+0xc54/0x11a0 [ 38.986095] __split_vma+0x5af/0x950 [ 38.986612] ? __pfx___split_vma+0x10/0x10 [ 38.987201] ? find_held_lock+0x2c/0x110 [ 38.987782] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.988404] ? lock_is_held_type+0x9f/0x120 [ 38.988998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.989667] ? mtree_range_walk+0x632/0x900 [ 38.990277] ? mas_walk+0x5c7/0x7c0 [ 38.990804] do_vmi_munmap+0x1f1/0x2b0 [ 38.991376] mmap_region+0x1f9/0x2660 [ 38.991910] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.992484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.993276] ? __pfx_lock_acquire+0x10/0x10 [ 38.993889] ? __pfx_mmap_region+0x10/0x10 [ 38.994474] ? security_mmap_addr+0x7d/0xa0 [ 38.995048] ? get_unmapped_area+0x1f5/0x3f0 [ 38.995641] do_mmap+0x854/0xf00 [ 38.996115] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.996647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.997249] ksys_mmap_pgoff+0x3af/0x500 [ 38.997793] do_syscall_64+0x3f/0x90 [ 38.998303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.999007] RIP: 0033:0x7fb12a518d82 [ 38.999500] 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 [ 39.001844] RSP: 002b:00007fff567e64d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.002817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb12a518d82 [ 39.003748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb129952000 [ 39.004662] RBP: 00007fb129952000 R08: 0000000000000009 R09: 0000000000001000 [ 39.005568] R10: 0000000000000812 R11: 0000000000000206 R12: 000056524a12cb20 [ 39.006478] R13: 00007fff567e64f0 R14: 00007fff567e6520 R15: 00007fff567e6880 [ 39.007405] [ 39.007722] [ 39.007955] Allocated by task 218: [ 39.008429] kasan_save_stack+0x22/0x50 [ 39.008987] kasan_set_track+0x25/0x30 [ 39.009533] __kasan_slab_alloc+0x59/0x70 [ 39.010118] kmem_cache_alloc+0x16b/0x370 [ 39.010699] vm_area_dup+0x20/0x160 [ 39.011219] __split_vma+0x170/0x950 [ 39.011738] split_vma+0xc6/0x110 [ 39.012229] mprotect_fixup+0x8d2/0xb30 [ 39.012786] do_mprotect_pkey+0x87e/0xd40 [ 39.013363] __x64_sys_mprotect+0x78/0xc0 [ 39.013939] do_syscall_64+0x3f/0x90 [ 39.014464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.015185] [ 39.015427] Freed by task 218: [ 39.015896] kasan_save_stack+0x22/0x50 [ 39.016486] kasan_set_track+0x25/0x30 [ 39.017027] kasan_save_free_info+0x2b/0x50 [ 39.017625] __kasan_slab_free+0x10a/0x190 [ 39.018222] kmem_cache_free+0x10d/0x4d0 [ 39.018788] rcu_core+0x8c8/0x2860 [ 39.019284] __do_softirq+0x1b7/0x7d4 [ 39.019811] [ 39.020047] Last potentially related work creation: [ 39.020710] kasan_save_stack+0x22/0x50 [ 39.021277] __kasan_record_aux_stack+0x8e/0xa0 [ 39.021890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.022587] remove_vma+0x139/0x170 [ 39.023093] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.023687] do_vmi_munmap+0x1f1/0x2b0 [ 39.024220] __vm_munmap+0x138/0x3a0 [ 39.024738] __x64_sys_munmap+0x59/0x80 [ 39.025281] do_syscall_64+0x3f/0x90 [ 39.025792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.026489] [ 39.026724] The buggy address belongs to the object at ffff88800f8ebe80 [ 39.026724] which belongs to the cache vm_area_struct of size 168 [ 39.028349] The buggy address is located 88 bytes inside of [ 39.028349] freed 168-byte region [ffff88800f8ebe80, ffff88800f8ebf28) [ 39.029863] [ 39.030097] The buggy address belongs to the physical page: [ 39.030808] page:00000000190dad72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf8eb [ 39.031979] memcg:ffff88800f2cdb01 [ 39.032438] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.033137] page_type: 0xffffffff() [ 39.033619] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.034638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2cdb01 [ 39.035646] page dumped because: kasan: bad access detected [ 39.036369] [ 39.036623] Memory state around the buggy address: [ 39.037270] ffff88800f8ebd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.038217] ffff88800f8ebe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.039174] >ffff88800f8ebe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.040128] ^ [ 39.040940] ffff88800f8ebf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.041890] ffff88800f8ebf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.042837] ================================================================== [ 39.043928] Disabling lock debugging due to kernel taint [ 40.942594] BUG: Bad rss-counter state mm:00000000a67ce240 type:MM_FILEPAGES val:33 [ 40.943782] BUG: Bad rss-counter state mm:00000000a67ce240 type:MM_ANONPAGES val:22 [ 41.370859] BUG: Bad rss-counter state mm:0000000044a1bb5f type:MM_FILEPAGES val:33 [ 41.372013] BUG: Bad rss-counter state mm:0000000044a1bb5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39359' (ECDSA) to the list of known hosts. 2023/06/20 09:24:52 fuzzer started 2023/06/20 09:24:53 dialing manager at localhost:44161 2023/06/20 09:24:53 checking machine... 2023/06/20 09:24:53 checking revisions... [ 42.065656] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:24:53 testing simple program... [ 42.104405] cgroup: Unknown subsys name 'net' [ 42.144925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff836532f8 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88800f147d20 RDI=ffffffff836532f8 RBP=ffffffff836532f8 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008ad26 R12=0000000000000001 R13=0000000000000000 R14=ffff8880146f1b40 R15=ffff88800eabaa00 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f5d59a7f900 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=00007f5d5a036618 CR3=000000000f3c8000 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=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=00007fa0dd077140 CR3=000000000d6dc000 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=3b6793bf6d4f708db740c01836ec0a1a XMM02=000000000011d568ec2efd57dc4c00df XMM03=0000000000123f282224dba007168db7 XMM04=bcbf880bfb489db900000000000ae988 XMM05=e7a3b750822471340000000000133800 XMM06=c0211e377d69197200000000001329d8 XMM07=e042d86d42eb936e00000000001241a8 XMM08=2224dba007168db7000000000011d5c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000