syzkaller login: [ 30.764673] BUG: Bad rss-counter state mm:0000000028945748 type:MM_FILEPAGES val:33 [ 30.766675] BUG: Bad rss-counter state mm:0000000028945748 type:MM_ANONPAGES val:22 [ 30.936900] ================================================================== [ 30.937902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.938896] Read of size 8 at addr ffff8880169b4798 by task sshd/221 [ 30.939735] [ 30.940061] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.941026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.942085] Call Trace: [ 30.942462] [ 30.942761] dump_stack_lvl+0x91/0xf0 [ 30.943291] print_report+0xcc/0x620 [ 30.943802] ? __virt_addr_valid+0x102/0x340 [ 30.944401] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945045] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945729] kasan_report+0xbe/0xf0 [ 30.946229] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.946899] vma_interval_tree_remove+0xc75/0xec0 [ 30.947530] vma_prepare+0xc54/0x11a0 [ 30.948052] __split_vma+0x5af/0x950 [ 30.948555] ? __pfx___split_vma+0x10/0x10 [ 30.949118] ? find_held_lock+0x2c/0x110 [ 30.949676] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.950269] ? lock_is_held_type+0x9f/0x120 [ 30.950853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.951487] ? mtree_range_walk+0x632/0x900 [ 30.952065] ? mas_walk+0x5c7/0x7c0 [ 30.952581] do_vmi_munmap+0x1f1/0x2b0 [ 30.953102] mmap_region+0x1f9/0x2660 [ 30.953619] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.954179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.954931] ? __pfx_lock_acquire+0x10/0x10 [ 30.955494] ? __pfx_mmap_region+0x10/0x10 [ 30.956046] ? security_mmap_addr+0x7d/0xa0 [ 30.956617] ? get_unmapped_area+0x1f5/0x3f0 [ 30.957191] do_mmap+0x854/0xf00 [ 30.957649] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.958185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.958780] ksys_mmap_pgoff+0x3af/0x500 [ 30.959317] do_syscall_64+0x3f/0x90 [ 30.959828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.960515] RIP: 0033:0x7f1ba06fdd82 [ 30.961006] 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 [ 30.963244] RSP: 002b:00007fff4a178008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.964186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ba06fdd82 [ 30.965074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b9fb37000 [ 30.965995] RBP: 00007f1b9fb37000 R08: 0000000000000009 R09: 0000000000001000 [ 30.966889] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564724bfd980 [ 30.967775] R13: 00007fff4a178020 R14: 00007fff4a178050 R15: 00007fff4a1783b0 [ 30.968670] [ 30.968981] [ 30.969205] Allocated by task 214: [ 30.969671] kasan_save_stack+0x22/0x50 [ 30.970215] kasan_set_track+0x25/0x30 [ 30.970732] __kasan_slab_alloc+0x59/0x70 [ 30.971291] kmem_cache_alloc+0x16b/0x370 [ 30.971830] vm_area_dup+0x20/0x160 [ 30.972310] __split_vma+0x170/0x950 [ 30.972805] split_vma+0xc6/0x110 [ 30.973261] mprotect_fixup+0x8d2/0xb30 [ 30.973800] do_mprotect_pkey+0x87e/0xd40 [ 30.974349] __x64_sys_mprotect+0x78/0xc0 [ 30.974896] do_syscall_64+0x3f/0x90 [ 30.975406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976075] [ 30.976301] Freed by task 214: [ 30.976714] kasan_save_stack+0x22/0x50 [ 30.977240] kasan_set_track+0x25/0x30 [ 30.977767] kasan_save_free_info+0x2b/0x50 [ 30.978323] __kasan_slab_free+0x10a/0x190 [ 30.978955] kmem_cache_free+0x10d/0x4d0 [ 30.979486] rcu_core+0x8c8/0x2860 [ 30.979952] __do_softirq+0x1b7/0x7d4 [ 30.980453] [ 30.980677] Last potentially related work creation: [ 30.981391] kasan_save_stack+0x22/0x50 [ 30.981936] __kasan_record_aux_stack+0x8e/0xa0 [ 30.982535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.983219] remove_vma+0x139/0x170 [ 30.983692] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.984270] do_vmi_munmap+0x1f1/0x2b0 [ 30.984778] __vm_munmap+0x138/0x3a0 [ 30.985273] __x64_sys_munmap+0x59/0x80 [ 30.985808] do_syscall_64+0x3f/0x90 [ 30.986306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.986981] [ 30.987209] The buggy address belongs to the object at ffff8880169b4740 [ 30.987209] which belongs to the cache vm_area_struct of size 168 [ 30.988745] The buggy address is located 88 bytes inside of [ 30.988745] freed 168-byte region [ffff8880169b4740, ffff8880169b47e8) [ 30.990221] [ 30.990457] The buggy address belongs to the physical page: [ 30.991155] page:00000000e0a350e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169b4 [ 30.992300] memcg:ffff88800dbe7901 [ 30.992752] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.993434] page_type: 0xffffffff() [ 30.993942] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.994907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbe7901 [ 30.995892] page dumped because: kasan: bad access detected [ 30.996613] [ 30.996845] Memory state around the buggy address: [ 30.997477] ffff8880169b4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.998399] ffff8880169b4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.999317] >ffff8880169b4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.000226] ^ [ 31.000745] ffff8880169b4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.001691] ffff8880169b4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.002593] ================================================================== [ 31.003654] Disabling lock debugging due to kernel taint [ 33.260178] BUG: Bad rss-counter state mm:00000000e3e7dd91 type:MM_FILEPAGES val:33 [ 33.261280] BUG: Bad rss-counter state mm:00000000e3e7dd91 type:MM_ANONPAGES val:22 [ 33.751602] BUG: Bad rss-counter state mm:00000000dc98b2cb type:MM_FILEPAGES val:33 [ 33.752837] BUG: Bad rss-counter state mm:00000000dc98b2cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37152' (ECDSA) to the list of known hosts. 2023/06/21 06:08:41 fuzzer started 2023/06/21 06:08:41 dialing manager at localhost:36067 2023/06/21 06:08:41 checking machine... 2023/06/21 06:08:41 checking revisions... [ 34.394961] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:08:41 testing simple program... [ 34.436906] cgroup: Unknown subsys name 'net' [ 34.484896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:08:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39500 RCX=0000000000000000 RDX=1ffff1100d9c73ee RSI=ffffffff8126f642 RDI=ffff88806ce39f70 RBP=00000000fffbf183 RSP=ffff88801412f8f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=1ffff11002825f2e R13=ffff88800d9b51c0 R14=0000000000000000 R15=ffff888008c04000 RIP=ffffffff8126f6e5 RFL=00000046 [---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 00007f37b1a0f700 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=00007ffc41142488 CR3=000000000f154000 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=2030343a38303a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a38303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf09ff8 RBX=ffff88800d9b1b40 RCX=ffff88800d858000 RDX=fffffe000006e000 RSI=ffff88800d9b1b40 RDI=ffff88806cf09a48 RBP=ffff88806cf09a98 RSP=ffff88806cf09a08 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88806cf09a98 R11=1ffff1100d9e7479 R12=ffff88806cf09a48 R13=ffff88806cf09ac0 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff8450e11f RFL=00000287 [--S--PC] 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 00007f5aabf41900 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=00007fdf8ca1d650 CR3=000000000cb76000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=26fc048307f0950800000000000ae988 XMM05=71a3b7d5e81aed930000000000133748 XMM06=c291bd5c70af25b90000000000132538 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000