syzkaller login: [ 33.803145] BUG: Bad rss-counter state mm:00000000854b6716 type:MM_FILEPAGES val:33 [ 33.804276] BUG: Bad rss-counter state mm:00000000854b6716 type:MM_ANONPAGES val:22 [ 33.969995] ================================================================== [ 33.971036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.972098] Read of size 8 at addr ffff888009368d08 by task sshd/220 [ 33.973110] [ 33.973378] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.974340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.975437] Call Trace: [ 33.975795] [ 33.976118] dump_stack_lvl+0x91/0xf0 [ 33.976662] print_report+0xcc/0x620 [ 33.977203] ? __virt_addr_valid+0x102/0x340 [ 33.977827] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.978516] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.979222] kasan_report+0xbe/0xf0 [ 33.979775] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.980493] vma_interval_tree_remove+0xc75/0xec0 [ 33.981193] vma_prepare+0xc54/0x11a0 [ 33.981762] __split_vma+0x5af/0x950 [ 33.982305] ? __pfx___split_vma+0x10/0x10 [ 33.982918] ? find_held_lock+0x2c/0x110 [ 33.983519] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.984170] ? lock_is_held_type+0x9f/0x120 [ 33.984791] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.985508] ? mtree_range_walk+0x632/0x900 [ 33.986143] ? mas_walk+0x5c7/0x7c0 [ 33.986691] do_vmi_munmap+0x1f1/0x2b0 [ 33.987266] mmap_region+0x1f9/0x2660 [ 33.987825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.988418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.989248] ? __pfx_lock_acquire+0x10/0x10 [ 33.989882] ? __pfx_mmap_region+0x10/0x10 [ 33.990497] ? security_mmap_addr+0x7d/0xa0 [ 33.991114] ? get_unmapped_area+0x1f5/0x3f0 [ 33.991749] do_mmap+0x854/0xf00 [ 33.992258] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.992833] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.993495] ksys_mmap_pgoff+0x3af/0x500 [ 33.994085] do_syscall_64+0x3f/0x90 [ 33.994640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.995391] RIP: 0033:0x7fca3ea36d82 [ 33.995921] 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 [ 33.998395] RSP: 002b:00007ffc614d7348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.999431] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca3ea36d82 [ 34.000403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca3de70000 [ 34.001375] RBP: 00007fca3de70000 R08: 0000000000000009 R09: 0000000000001000 [ 34.002351] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2dd2b1f70 [ 34.003322] R13: 00007ffc614d7360 R14: 00007ffc614d7390 R15: 00007ffc614d76f0 [ 34.004306] [ 34.004643] [ 34.004889] Allocated by task 213: [ 34.005389] kasan_save_stack+0x22/0x50 [ 34.005970] kasan_set_track+0x25/0x30 [ 34.006539] __kasan_slab_alloc+0x59/0x70 [ 34.007139] kmem_cache_alloc+0x16b/0x370 [ 34.007730] vm_area_dup+0x20/0x160 [ 34.008250] __split_vma+0x170/0x950 [ 34.008786] split_vma+0xc6/0x110 [ 34.009291] mprotect_fixup+0x8d2/0xb30 [ 34.009893] do_mprotect_pkey+0x87e/0xd40 [ 34.010490] __x64_sys_mprotect+0x78/0xc0 [ 34.011090] do_syscall_64+0x3f/0x90 [ 34.011636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.012379] [ 34.012628] Freed by task 213: [ 34.013076] kasan_save_stack+0x22/0x50 [ 34.013668] kasan_set_track+0x25/0x30 [ 34.014308] kasan_save_free_info+0x2b/0x50 [ 34.014921] __kasan_slab_free+0x10a/0x190 [ 34.015535] kmem_cache_free+0x10d/0x4d0 [ 34.016123] rcu_core+0x8c8/0x2860 [ 34.016631] __do_softirq+0x1b7/0x7d4 [ 34.017178] [ 34.017445] Last potentially related work creation: [ 34.018120] kasan_save_stack+0x22/0x50 [ 34.018700] __kasan_record_aux_stack+0x8e/0xa0 [ 34.019362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.020097] remove_vma+0x139/0x170 [ 34.020618] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.021258] do_vmi_munmap+0x1f1/0x2b0 [ 34.021827] __vm_munmap+0x138/0x3a0 [ 34.022368] __x64_sys_munmap+0x59/0x80 [ 34.022940] do_syscall_64+0x3f/0x90 [ 34.023482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.024210] [ 34.024452] The buggy address belongs to the object at ffff888009368cb0 [ 34.024452] which belongs to the cache vm_area_struct of size 168 [ 34.026119] The buggy address is located 88 bytes inside of [ 34.026119] freed 168-byte region [ffff888009368cb0, ffff888009368d58) [ 34.027719] [ 34.027965] The buggy address belongs to the physical page: [ 34.028715] page:00000000ecdae92b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9368 [ 34.029968] memcg:ffff8880159aab01 [ 34.030456] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.031190] page_type: 0xffffffff() [ 34.031697] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.032743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159aab01 [ 34.033787] page dumped because: kasan: bad access detected [ 34.034526] [ 34.034771] Memory state around the buggy address: [ 34.035429] ffff888009368c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.036395] ffff888009368c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.037385] >ffff888009368d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.038356] ^ [ 34.038858] ffff888009368d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.039827] ffff888009368e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.040797] ================================================================== [ 34.041948] Disabling lock debugging due to kernel taint [ 36.685722] BUG: Bad rss-counter state mm:00000000212003fa type:MM_FILEPAGES val:33 [ 36.686721] BUG: Bad rss-counter state mm:00000000212003fa type:MM_ANONPAGES val:22 [ 37.129766] BUG: Bad rss-counter state mm:000000009462b2cc type:MM_FILEPAGES val:33 [ 37.130791] BUG: Bad rss-counter state mm:000000009462b2cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9269' (ECDSA) to the list of known hosts. 2023/06/19 13:48:41 fuzzer started 2023/06/19 13:48:41 dialing manager at localhost:44161 2023/06/19 13:48:41 checking machine... 2023/06/19 13:48:41 checking revisions... [ 37.890677] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:48:41 testing simple program... [ 37.949295] cgroup: Unknown subsys name 'net' [ 38.006340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:48:38 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff861d811c RDX=0000000000000008 RSI=ffff888018c2f718 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff861d8120 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000003ba38 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888018c2f720 R15=ffff88806ce09a98 RIP=ffffffff81131019 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 00007f2b8e6ca700 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=00007fa856291cf0 CR3=000000000f9a6000 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=2031343a38343a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a38343a3331203931 XMM08=3d656e696c646d632022656369767265 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=00007ffcfaedcff8 CR3=0000000005482000 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=00007fe6c64da51000005586265b6790 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