syzkaller login: [ 31.320114] BUG: Bad rss-counter state mm:0000000096393190 type:MM_FILEPAGES val:33 [ 31.321492] BUG: Bad rss-counter state mm:0000000096393190 type:MM_ANONPAGES val:22 [ 31.496426] ================================================================== [ 31.497440] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.498492] Read of size 8 at addr ffff88800e3b76b0 by task sshd/220 [ 31.499307] [ 31.499542] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.500507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.501546] Call Trace: [ 31.501892] [ 31.502196] dump_stack_lvl+0x91/0xf0 [ 31.502718] print_report+0xcc/0x620 [ 31.503236] ? __virt_addr_valid+0x102/0x340 [ 31.503849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.504504] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.505157] kasan_report+0xbe/0xf0 [ 31.505666] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.506327] vma_interval_tree_remove+0xc75/0xec0 [ 31.506982] vma_prepare+0xc54/0x11a0 [ 31.507491] __split_vma+0x5af/0x950 [ 31.508021] ? __pfx___split_vma+0x10/0x10 [ 31.508591] ? find_held_lock+0x2c/0x110 [ 31.509154] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.509761] ? lock_is_held_type+0x9f/0x120 [ 31.510338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.510988] ? mtree_range_walk+0x632/0x900 [ 31.511584] ? mas_walk+0x5c7/0x7c0 [ 31.512106] do_vmi_munmap+0x1f1/0x2b0 [ 31.512631] mmap_region+0x1f9/0x2660 [ 31.513143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.513690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.514447] ? __pfx_lock_acquire+0x10/0x10 [ 31.515019] ? __pfx_mmap_region+0x10/0x10 [ 31.515586] ? security_mmap_addr+0x7d/0xa0 [ 31.516169] ? get_unmapped_area+0x1f5/0x3f0 [ 31.516755] do_mmap+0x854/0xf00 [ 31.517222] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.517759] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.518359] ksys_mmap_pgoff+0x3af/0x500 [ 31.518902] do_syscall_64+0x3f/0x90 [ 31.519417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.520118] RIP: 0033:0x7fe98e02ad82 [ 31.520601] 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 [ 31.522862] RSP: 002b:00007ffc559f1438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.523821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe98e02ad82 [ 31.524721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe98d464000 [ 31.525620] RBP: 00007fe98d464000 R08: 0000000000000009 R09: 0000000000001000 [ 31.526511] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cc4d18ec0 [ 31.527410] R13: 00007ffc559f1450 R14: 00007ffc559f1480 R15: 00007ffc559f17e0 [ 31.528334] [ 31.528644] [ 31.528877] Allocated by task 213: [ 31.529340] kasan_save_stack+0x22/0x50 [ 31.529879] kasan_set_track+0x25/0x30 [ 31.530415] __kasan_slab_alloc+0x59/0x70 [ 31.530975] kmem_cache_alloc+0x16b/0x370 [ 31.531528] vm_area_dup+0x20/0x160 [ 31.532019] __split_vma+0x170/0x950 [ 31.532519] split_vma+0xc6/0x110 [ 31.532993] mprotect_fixup+0x8d2/0xb30 [ 31.533522] do_mprotect_pkey+0x87e/0xd40 [ 31.534080] __x64_sys_mprotect+0x78/0xc0 [ 31.534636] do_syscall_64+0x3f/0x90 [ 31.535142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.535832] [ 31.536062] Freed by task 203: [ 31.536486] kasan_save_stack+0x22/0x50 [ 31.537021] kasan_set_track+0x25/0x30 [ 31.537549] kasan_save_free_info+0x2b/0x50 [ 31.538123] __kasan_slab_free+0x10a/0x190 [ 31.538698] kmem_cache_free+0x10d/0x4d0 [ 31.539241] rcu_core+0x8c8/0x2860 [ 31.539735] __do_softirq+0x1b7/0x7d4 [ 31.540249] [ 31.540480] Last potentially related work creation: [ 31.541109] kasan_save_stack+0x22/0x50 [ 31.541640] __kasan_record_aux_stack+0x8e/0xa0 [ 31.542251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.542939] remove_vma+0x139/0x170 [ 31.543415] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.544010] do_vmi_munmap+0x1f1/0x2b0 [ 31.544525] __vm_munmap+0x138/0x3a0 [ 31.545022] __x64_sys_munmap+0x59/0x80 [ 31.545556] do_syscall_64+0x3f/0x90 [ 31.546061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.546749] [ 31.546980] Second to last potentially related work creation: [ 31.547728] kasan_save_stack+0x22/0x50 [ 31.548268] __kasan_record_aux_stack+0x8e/0xa0 [ 31.548891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.549584] remove_vma+0x139/0x170 [ 31.550062] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.550667] do_vmi_munmap+0x1f1/0x2b0 [ 31.551221] mmap_region+0x1f9/0x2660 [ 31.551751] do_mmap+0x854/0xf00 [ 31.552206] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.552737] ksys_mmap_pgoff+0x3af/0x500 [ 31.553280] do_syscall_64+0x3f/0x90 [ 31.553799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.554483] [ 31.554711] The buggy address belongs to the object at ffff88800e3b7658 [ 31.554711] which belongs to the cache vm_area_struct of size 168 [ 31.556303] The buggy address is located 88 bytes inside of [ 31.556303] freed 168-byte region [ffff88800e3b7658, ffff88800e3b7700) [ 31.557814] [ 31.558047] The buggy address belongs to the physical page: [ 31.558753] page:000000003709556c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3b7 [ 31.559949] memcg:ffff88800e325b01 [ 31.560409] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.561158] page_type: 0xffffffff() [ 31.561642] raw: 0100000000000200 ffff8880087a0c80 ffffea0000690c40 dead000000000003 [ 31.562619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e325b01 [ 31.563581] page dumped because: kasan: bad access detected [ 31.564294] [ 31.564522] Memory state around the buggy address: [ 31.565136] ffff88800e3b7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.566042] ffff88800e3b7600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.566962] >ffff88800e3b7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.567891] ^ [ 31.568508] ffff88800e3b7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.569425] ffff88800e3b7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.570350] ================================================================== [ 31.571519] Disabling lock debugging due to kernel taint [ 33.598912] BUG: Bad rss-counter state mm:00000000ea69fc58 type:MM_FILEPAGES val:33 [ 33.600278] BUG: Bad rss-counter state mm:00000000ea69fc58 type:MM_ANONPAGES val:22 [ 34.082426] BUG: Bad rss-counter state mm:00000000a6a000a4 type:MM_FILEPAGES val:33 [ 34.083917] BUG: Bad rss-counter state mm:00000000a6a000a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22468' (ECDSA) to the list of known hosts. 2023/06/20 19:55:54 fuzzer started 2023/06/20 19:55:54 dialing manager at localhost:36067 2023/06/20 19:55:54 checking machine... 2023/06/20 19:55:54 checking revisions... [ 34.860547] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:55:54 testing simple program... [ 34.901843] cgroup: Unknown subsys name 'net' [ 34.961933] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:55:54 Registers: info registers vcpu 0 RAX=00000000000068dd RBX=ffffffff85d3e490 RCX=1ffffffff0ba7a85 RDX=00000000fffbefe9 RSI=00000000fffbefe9 RDI=ffff888008d903f4 RBP=ffff88806ce3a2d8 RSP=ffff88806ce09c58 R8 =00000000fffd8a11 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806ce09ff8 R12=ffffffff85d3d41c R13=ffff88806ce3a2c0 R14=1ffff1100d9c139c R15=0000000000000000 RIP=ffffffff8137cc78 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 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=00007f1595f30940 CR3=000000000d724000 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=35353a3931203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813782f8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011c6f36 RSI=ffffffff813782f8 RDI=ffff888008e37a20 RBP=ffff888008e379f0 RSP=ffff888008e37950 R8 =0000000000000001 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000022978 R12=ffff888008e37a20 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88800ca69580 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 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=00007ffcb0935000 CR3=000000000c47a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000