syzkaller login: [ 36.122082] BUG: Bad rss-counter state mm:000000004e71aad8 type:MM_FILEPAGES val:33 [ 36.123073] BUG: Bad rss-counter state mm:000000004e71aad8 type:MM_ANONPAGES val:22 [ 36.289049] ================================================================== [ 36.290110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.291215] Read of size 8 at addr ffff88800d7be228 by task sshd/221 [ 36.292166] [ 36.292387] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.293243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.294233] Call Trace: [ 36.294552] [ 36.294843] dump_stack_lvl+0x91/0xf0 [ 36.295334] print_report+0xcc/0x620 [ 36.295832] ? __virt_addr_valid+0x102/0x340 [ 36.296382] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.297013] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.297628] kasan_report+0xbe/0xf0 [ 36.298116] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.298740] vma_interval_tree_remove+0xc75/0xec0 [ 36.299340] vma_prepare+0xc54/0x11a0 [ 36.299834] __split_vma+0x5af/0x950 [ 36.300304] ? __pfx___split_vma+0x10/0x10 [ 36.300832] ? find_held_lock+0x2c/0x110 [ 36.301351] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.301911] ? lock_is_held_type+0x9f/0x120 [ 36.302443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.303041] ? mtree_range_walk+0x632/0x900 [ 36.303588] ? mas_walk+0x5c7/0x7c0 [ 36.304082] do_vmi_munmap+0x1f1/0x2b0 [ 36.304569] mmap_region+0x1f9/0x2660 [ 36.305045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.305551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.306259] ? __pfx_lock_acquire+0x10/0x10 [ 36.306798] ? __pfx_mmap_region+0x10/0x10 [ 36.307324] ? security_mmap_addr+0x7d/0xa0 [ 36.307870] ? get_unmapped_area+0x1f5/0x3f0 [ 36.308433] do_mmap+0x854/0xf00 [ 36.308872] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.309363] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.309934] ksys_mmap_pgoff+0x3af/0x500 [ 36.310438] do_syscall_64+0x3f/0x90 [ 36.310913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.311554] RIP: 0033:0x7f89e7554d82 [ 36.312016] 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 [ 36.314126] RSP: 002b:00007ffda3e252c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.315028] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89e7554d82 [ 36.315893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89e698e000 [ 36.316730] RBP: 00007f89e698e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.317567] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556287b5f70 [ 36.318415] R13: 00007ffda3e252e0 R14: 00007ffda3e25310 R15: 00007ffda3e25670 [ 36.319263] [ 36.319556] [ 36.319792] Allocated by task 214: [ 36.320227] kasan_save_stack+0x22/0x50 [ 36.320727] kasan_set_track+0x25/0x30 [ 36.321228] __kasan_slab_alloc+0x59/0x70 [ 36.321755] kmem_cache_alloc+0x16b/0x370 [ 36.322285] vm_area_dup+0x20/0x160 [ 36.322740] __split_vma+0x170/0x950 [ 36.323204] split_vma+0xc6/0x110 [ 36.323639] mprotect_fixup+0x8d2/0xb30 [ 36.324160] do_mprotect_pkey+0x87e/0xd40 [ 36.324677] __x64_sys_mprotect+0x78/0xc0 [ 36.325189] do_syscall_64+0x3f/0x90 [ 36.325663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.326306] [ 36.326518] Freed by task 211: [ 36.326907] kasan_save_stack+0x22/0x50 [ 36.327410] kasan_set_track+0x25/0x30 [ 36.327924] kasan_save_free_info+0x2b/0x50 [ 36.328458] __kasan_slab_free+0x10a/0x190 [ 36.328991] kmem_cache_free+0x10d/0x4d0 [ 36.329493] rcu_core+0x8c8/0x2860 [ 36.329944] __do_softirq+0x1b7/0x7d4 [ 36.330421] [ 36.330638] Last potentially related work creation: [ 36.331221] kasan_save_stack+0x22/0x50 [ 36.331722] __kasan_record_aux_stack+0x8e/0xa0 [ 36.332309] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.332944] remove_vma+0x139/0x170 [ 36.333400] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.333949] do_vmi_munmap+0x1f1/0x2b0 [ 36.334431] __vm_munmap+0x138/0x3a0 [ 36.334894] __x64_sys_munmap+0x59/0x80 [ 36.335386] do_syscall_64+0x3f/0x90 [ 36.335863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.336507] [ 36.336719] The buggy address belongs to the object at ffff88800d7be1d0 [ 36.336719] which belongs to the cache vm_area_struct of size 168 [ 36.338186] The buggy address is located 88 bytes inside of [ 36.338186] freed 168-byte region [ffff88800d7be1d0, ffff88800d7be278) [ 36.339595] [ 36.339823] The buggy address belongs to the physical page: [ 36.340488] page:00000000700bc29f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7be [ 36.341570] memcg:ffff888018f62901 [ 36.342006] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.342647] page_type: 0xffffffff() [ 36.343099] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.344035] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f62901 [ 36.344946] page dumped because: kasan: bad access detected [ 36.345607] [ 36.345819] Memory state around the buggy address: [ 36.346410] ffff88800d7be100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.347256] ffff88800d7be180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.348114] >ffff88800d7be200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.348968] ^ [ 36.349524] ffff88800d7be280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.350373] ffff88800d7be300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.351218] ================================================================== [ 36.352192] Disabling lock debugging due to kernel taint [ 38.203799] BUG: Bad rss-counter state mm:00000000a2b774fd type:MM_FILEPAGES val:33 [ 38.205086] BUG: Bad rss-counter state mm:00000000a2b774fd type:MM_ANONPAGES val:22 [ 38.792064] BUG: Bad rss-counter state mm:00000000c6e77bd4 type:MM_FILEPAGES val:33 [ 38.793240] BUG: Bad rss-counter state mm:00000000c6e77bd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37577' (ECDSA) to the list of known hosts. 2023/06/20 01:21:13 fuzzer started 2023/06/20 01:21:13 dialing manager at localhost:44161 2023/06/20 01:21:13 checking machine... 2023/06/20 01:21:13 checking revisions... [ 39.459600] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:21:13 testing simple program... [ 39.512832] cgroup: Unknown subsys name 'net' [ 39.562382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:21:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc9379be98 CR3=0000000005482000 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=00007fddd04da510000055574f018790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016f2f848 RCX=ffffffff863b1c01 RDX=1ffff11002de5f14 RSI=0000000000000000 RDI=ffff888016f2f848 RBP=ffff888016f2f8a0 RSP=ffff888016f2f830 R8 =ffffffff863b1c9a R9 =ffff888016f2f888 R10=0000000000038001 R11=000000000008a977 R12=ffff888016f2f910 R13=0000000000000000 R14=ffff888009b53680 R15=0000000000092cc0 RIP=ffffffff8113038e 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 00007fc0e3c03900 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=00007fc0e41ba618 CR3=0000000016b28000 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