syzkaller login: [ 31.670817] BUG: Bad rss-counter state mm:00000000e418eaf7 type:MM_FILEPAGES val:33 [ 31.672048] BUG: Bad rss-counter state mm:00000000e418eaf7 type:MM_ANONPAGES val:22 [ 31.708723] ================================================================== [ 31.709695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.710657] Read of size 8 at addr ffff888009a6b968 by task sshd/220 [ 31.711499] [ 31.711721] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.712599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.713617] Call Trace: [ 31.713952] [ 31.714327] dump_stack_lvl+0x91/0xf0 [ 31.714837] print_report+0xcc/0x620 [ 31.715336] ? __virt_addr_valid+0x102/0x340 [ 31.715917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716546] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717173] kasan_report+0xbe/0xf0 [ 31.717652] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.718302] vma_interval_tree_remove+0xc75/0xec0 [ 31.718929] vma_prepare+0xc54/0x11a0 [ 31.719416] __split_vma+0x5af/0x950 [ 31.719899] ? __pfx___split_vma+0x10/0x10 [ 31.720431] ? find_held_lock+0x2c/0x110 [ 31.720957] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.721526] ? lock_is_held_type+0x9f/0x120 [ 31.722063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.722684] ? mtree_range_walk+0x632/0x900 [ 31.723240] ? mas_walk+0x5c7/0x7c0 [ 31.723714] do_vmi_munmap+0x1f1/0x2b0 [ 31.724223] mmap_region+0x1f9/0x2660 [ 31.724710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.725231] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.725957] ? __pfx_lock_acquire+0x10/0x10 [ 31.726518] ? __pfx_mmap_region+0x10/0x10 [ 31.727068] ? security_mmap_addr+0x7d/0xa0 [ 31.727618] ? get_unmapped_area+0x1f5/0x3f0 [ 31.728184] do_mmap+0x854/0xf00 [ 31.728636] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.729142] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.729711] ksys_mmap_pgoff+0x3af/0x500 [ 31.730252] do_syscall_64+0x3f/0x90 [ 31.730737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.731395] RIP: 0033:0x7f4d23b8cd82 [ 31.731854] 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 [ 31.734001] RSP: 002b:00007ffdab7f2508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.734933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d23b8cd82 [ 31.735781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d22fc6000 [ 31.736630] RBP: 00007f4d22fc6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.737479] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c955ecf70 [ 31.738335] R13: 00007ffdab7f2520 R14: 00007ffdab7f2550 R15: 00007ffdab7f28b0 [ 31.739197] [ 31.739487] [ 31.739707] Allocated by task 213: [ 31.740133] kasan_save_stack+0x22/0x50 [ 31.740655] kasan_set_track+0x25/0x30 [ 31.741147] __kasan_slab_alloc+0x59/0x70 [ 31.741695] kmem_cache_alloc+0x16b/0x370 [ 31.742224] vm_area_dup+0x20/0x160 [ 31.742692] __split_vma+0x170/0x950 [ 31.743164] split_vma+0xc6/0x110 [ 31.743606] mprotect_fixup+0x8d2/0xb30 [ 31.744107] do_mprotect_pkey+0x87e/0xd40 [ 31.744633] __x64_sys_mprotect+0x78/0xc0 [ 31.745160] do_syscall_64+0x3f/0x90 [ 31.745636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.746305] [ 31.746522] Freed by task 213: [ 31.746918] kasan_save_stack+0x22/0x50 [ 31.747425] kasan_set_track+0x25/0x30 [ 31.747921] kasan_save_free_info+0x2b/0x50 [ 31.748477] __kasan_slab_free+0x10a/0x190 [ 31.749020] kmem_cache_free+0x10d/0x4d0 [ 31.749533] rcu_core+0x8c8/0x2860 [ 31.749988] __do_softirq+0x1b7/0x7d4 [ 31.750492] [ 31.750709] Last potentially related work creation: [ 31.751294] kasan_save_stack+0x22/0x50 [ 31.751813] __kasan_record_aux_stack+0x8e/0xa0 [ 31.752396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.753049] remove_vma+0x139/0x170 [ 31.753506] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.754091] do_vmi_munmap+0x1f1/0x2b0 [ 31.754589] __vm_munmap+0x138/0x3a0 [ 31.755065] __x64_sys_munmap+0x59/0x80 [ 31.755568] do_syscall_64+0x3f/0x90 [ 31.756057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.756740] [ 31.756966] Second to last potentially related work creation: [ 31.757684] kasan_save_stack+0x22/0x50 [ 31.758238] __kasan_record_aux_stack+0x8e/0xa0 [ 31.758837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.759525] remove_vma+0x139/0x170 [ 31.760002] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.760592] do_vmi_munmap+0x1f1/0x2b0 [ 31.761102] mmap_region+0x1f9/0x2660 [ 31.761609] do_mmap+0x854/0xf00 [ 31.762057] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.762576] ksys_mmap_pgoff+0x7d/0x500 [ 31.763098] do_syscall_64+0x3f/0x90 [ 31.763592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.764271] [ 31.764501] The buggy address belongs to the object at ffff888009a6b910 [ 31.764501] which belongs to the cache vm_area_struct of size 168 [ 31.766040] The buggy address is located 88 bytes inside of [ 31.766040] freed 168-byte region [ffff888009a6b910, ffff888009a6b9b8) [ 31.767550] [ 31.767781] The buggy address belongs to the physical page: [ 31.768475] page:0000000039d25df1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a6b [ 31.769630] memcg:ffff88800ec1e501 [ 31.770086] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.770772] page_type: 0xffffffff() [ 31.771244] raw: 0100000000000200 ffff88800879fc80 ffffea0000269b80 dead000000000004 [ 31.772223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec1e501 [ 31.773191] page dumped because: kasan: bad access detected [ 31.773884] [ 31.774117] Memory state around the buggy address: [ 31.774724] ffff888009a6b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.775625] ffff888009a6b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.776529] >ffff888009a6b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.777434] ^ [ 31.778283] ffff888009a6b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.779189] ffff888009a6ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.780098] ================================================================== [ 31.781269] Disabling lock debugging due to kernel taint [ 34.427844] BUG: Bad rss-counter state mm:000000002c8416a5 type:MM_FILEPAGES val:33 [ 34.428910] BUG: Bad rss-counter state mm:000000002c8416a5 type:MM_ANONPAGES val:22 [ 34.988457] BUG: Bad rss-counter state mm:000000008eac59ae type:MM_FILEPAGES val:33 [ 34.989624] BUG: Bad rss-counter state mm:000000008eac59ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53789' (ECDSA) to the list of known hosts. 2023/06/19 19:23:29 fuzzer started 2023/06/19 19:23:29 dialing manager at localhost:44161 2023/06/19 19:23:29 checking machine... 2023/06/19 19:23:29 checking revisions... [ 35.614758] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:23:30 testing simple program... [ 35.664883] cgroup: Unknown subsys name 'net' [ 35.750156] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:23:28 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000555f8966ac30 RCX=0000000080000000 RDX=1ffff11002d7bfcf RSI=ffffffff82245769 RDI=ffff888016bdfe80 RBP=ffff888016bdfe78 RSP=ffff888016bdf778 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000005 R11=0000000000000000 R12=0000000000000000 R13=ffff888016bdfe70 R14=0000000000000053 R15=ffff888016bdfe70 RIP=ffffffff814c07f1 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 00007fa9b65d6900 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=00007f7bef1f9650 CR3=000000000d48c000 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=103ef195379fd5b80e46b7a43efd2852 XMM02=eff9b2d0a8fce9cb000000000011c3c0 XMM03=2c67c8bc2e329bc3000000000011c4e8 XMM04=f962e653e2a3f08200000000000ae988 XMM05=4c8a0c0ad6be73690000000000135aa8 XMM06=14f96c0ddbbde72d0000000000134848 XMM07=fb795ef6d65770560000000000123988 XMM08=2c67c8bc2e329bc3000000000011c4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000014 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016837b01 RSI=ffff888016837bb8 RDI=ffff888016837bb8 RBP=ffff8880168372e8 RSP=ffff888016837218 R8 =0000000000000001 R9 =ffff8880168372d0 R10=0000000000038001 R11=0000000000091bd6 R12=ffff8880168372f0 R13=ffff8880168372d8 R14=ffff888016837bb8 R15=ffff888016837290 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f7beec44900 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=00007f7bef1fb618 CR3=000000001be94000 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=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