syzkaller login: [ 41.832708] BUG: Bad rss-counter state mm:00000000233e7f48 type:MM_FILEPAGES val:33 [ 41.834203] BUG: Bad rss-counter state mm:00000000233e7f48 type:MM_ANONPAGES val:22 [ 41.995271] ================================================================== [ 41.996366] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.997511] Read of size 8 at addr ffff888015912ed8 by task sshd/220 [ 41.998332] [ 41.998569] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.999490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.000538] Call Trace: [ 42.000894] <TASK> [ 42.001200] dump_stack_lvl+0x91/0xf0 [ 42.001720] print_report+0xcc/0x620 [ 42.002240] ? __virt_addr_valid+0x102/0x340 [ 42.002828] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.003489] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.004145] kasan_report+0xbe/0xf0 [ 42.004655] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.005350] vma_interval_tree_remove+0xc75/0xec0 [ 42.005996] vma_prepare+0xc54/0x11a0 [ 42.006508] __split_vma+0x5af/0x950 [ 42.007012] ? __pfx___split_vma+0x10/0x10 [ 42.007580] ? find_held_lock+0x2c/0x110 [ 42.008141] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.008750] ? lock_is_held_type+0x9f/0x120 [ 42.009331] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.009987] ? mtree_range_walk+0x632/0x900 [ 42.010577] ? mas_walk+0x5c7/0x7c0 [ 42.011085] do_vmi_munmap+0x1f1/0x2b0 [ 42.011609] mmap_region+0x1f9/0x2660 [ 42.012123] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.012691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.013459] ? __pfx_lock_acquire+0x10/0x10 [ 42.014030] ? __pfx_mmap_region+0x10/0x10 [ 42.014601] ? security_mmap_addr+0x7d/0xa0 [ 42.015173] ? get_unmapped_area+0x1f5/0x3f0 [ 42.015762] do_mmap+0x854/0xf00 [ 42.016233] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.016788] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.017396] ksys_mmap_pgoff+0x3af/0x500 [ 42.017940] do_syscall_64+0x3f/0x90 [ 42.018451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.019145] RIP: 0033:0x7f2800fb6d82 [ 42.019634] 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 [ 42.021925] RSP: 002b:00007ffeffc0feb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.022902] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2800fb6d82 [ 42.023815] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28003f0000 [ 42.024754] RBP: 00007f28003f0000 R08: 0000000000000009 R09: 0000000000001000 [ 42.025667] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d73434bb20 [ 42.026587] R13: 00007ffeffc0fed0 R14: 00007ffeffc0ff00 R15: 00007ffeffc10260 [ 42.027536] </TASK> [ 42.027853] [ 42.028081] Allocated by task 213: [ 42.028543] kasan_save_stack+0x22/0x50 [ 42.029096] kasan_set_track+0x25/0x30 [ 42.029622] __kasan_slab_alloc+0x59/0x70 [ 42.030179] kmem_cache_alloc+0x16b/0x370 [ 42.030717] vm_area_dup+0x20/0x160 [ 42.031200] __split_vma+0x170/0x950 [ 42.031697] split_vma+0xc6/0x110 [ 42.032174] mprotect_fixup+0x8d2/0xb30 [ 42.032725] do_mprotect_pkey+0x87e/0xd40 [ 42.033298] __x64_sys_mprotect+0x78/0xc0 [ 42.033882] do_syscall_64+0x3f/0x90 [ 42.034414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.035245] [ 42.035487] Freed by task 213: [ 42.035924] kasan_save_stack+0x22/0x50 [ 42.036485] kasan_set_track+0x25/0x30 [ 42.037047] kasan_save_free_info+0x2b/0x50 [ 42.037642] __kasan_slab_free+0x10a/0x190 [ 42.038243] kmem_cache_free+0x10d/0x4d0 [ 42.038815] rcu_core+0x8c8/0x2860 [ 42.039314] __do_softirq+0x1b7/0x7d4 [ 42.039847] [ 42.040087] Last potentially related work creation: [ 42.040755] kasan_save_stack+0x22/0x50 [ 42.041317] __kasan_record_aux_stack+0x8e/0xa0 [ 42.041962] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.042674] remove_vma+0x139/0x170 [ 42.043176] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.043799] do_vmi_munmap+0x1f1/0x2b0 [ 42.044339] __vm_munmap+0x138/0x3a0 [ 42.044884] __x64_sys_munmap+0x59/0x80 [ 42.045437] do_syscall_64+0x3f/0x90 [ 42.045986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.046683] [ 42.046911] The buggy address belongs to the object at ffff888015912e80 [ 42.046911] which belongs to the cache vm_area_struct of size 168 [ 42.048518] The buggy address is located 88 bytes inside of [ 42.048518] freed 168-byte region [ffff888015912e80, ffff888015912f28) [ 42.050028] [ 42.050255] The buggy address belongs to the physical page: [ 42.050953] page:00000000772b693a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15912 [ 42.052107] memcg:ffff888015a68e01 [ 42.052564] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.053258] page_type: 0xffffffff() [ 42.053739] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.054726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a68e01 [ 42.055719] page dumped because: kasan: bad access detected [ 42.056436] [ 42.056696] Memory state around the buggy address: [ 42.057331] ffff888015912d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.058265] ffff888015912e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.059202] >ffff888015912e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.060130] ^ [ 42.060942] ffff888015912f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 42.061875] ffff888015912f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.062814] ================================================================== [ 42.063867] Disabling lock debugging due to kernel taint [ 44.023277] BUG: Bad rss-counter state mm:0000000094140366 type:MM_FILEPAGES val:31 [ 44.024364] BUG: Bad rss-counter state mm:0000000094140366 type:MM_ANONPAGES val:22 [ 44.590649] BUG: Bad rss-counter state mm:000000002ef99d4a type:MM_FILEPAGES val:33 [ 44.591808] BUG: Bad rss-counter state mm:000000002ef99d4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25969' (ECDSA) to the list of known hosts. 2023/06/19 19:01:16 fuzzer started 2023/06/19 19:01:16 dialing manager at localhost:44161 2023/06/19 19:01:16 checking machine... 2023/06/19 19:01:16 checking revisions... [ 45.230906] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:17 testing simple program... [ 45.278217] cgroup: Unknown subsys name 'net' [ 45.314141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d64d1c0 RSI=ffffffff81894b91 RDI=0000000000000005 RBP=ffff88800b588c98 RSP=ffff8880102e7578 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c7379732f R12=0000000000000000 R13=0000000000000081 R14=ffffffff856f0b20 R15=ffff88800b588c9a RIP=ffffffff814c081b 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 00007f5ee3a0e900 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=00007f5ee2e25830 CR3=000000000eb10000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=52ba93b4ecb215b100000000000ae988 XMM05=a68f9d271437567b00000000001352b0 XMM06=8d08b7629cae0c180000000000134358 XMM07=fb795ef6d65770560000000000124878 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880101a7548 RCX=0000000000000001 RDX=1ffff11002034eab RSI=ffff8880101a7f50 RDI=ffff8880101a7558 RBP=ffff8880101a7f50 RSP=ffff8880101a74a0 R8 =ffffffff864b024a R9 =ffff8880101a7588 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff8880101a0000 R14=ffff8880101a7f58 R15=ffff8880101a7548 RIP=ffffffff8113046e 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 00007f3b1f14d900 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=00007f3b1f704618 CR3=000000001a342000 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=563412feff00545000000000000080fe 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