syzkaller login: [ 60.887339] BUG: Bad rss-counter state mm:00000000a9353d16 type:MM_FILEPAGES val:31 [ 60.888836] BUG: Bad rss-counter state mm:00000000a9353d16 type:MM_ANONPAGES val:22 [ 61.027052] ================================================================== [ 61.028145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.029256] Read of size 8 at addr ffff888017b3d798 by task sshd/220 [ 61.030305] [ 61.030588] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.031652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.032867] Call Trace: [ 61.033254] [ 61.033601] dump_stack_lvl+0x91/0xf0 [ 61.034179] print_report+0xcc/0x620 [ 61.034758] ? __virt_addr_valid+0x102/0x340 [ 61.035425] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.036160] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.036894] kasan_report+0xbe/0xf0 [ 61.037465] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.038198] vma_interval_tree_remove+0xc75/0xec0 [ 61.038915] vma_prepare+0xc54/0x11a0 [ 61.039499] __split_vma+0x5af/0x950 [ 61.040060] ? __pfx___split_vma+0x10/0x10 [ 61.040680] ? find_held_lock+0x2c/0x110 [ 61.041302] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.041974] ? lock_is_held_type+0x9f/0x120 [ 61.042610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.043332] ? mtree_range_walk+0x632/0x900 [ 61.043994] ? mas_walk+0x5c7/0x7c0 [ 61.044508] do_vmi_munmap+0x1f1/0x2b0 [ 61.044991] mmap_region+0x1f9/0x2660 [ 61.045453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.045941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.046613] ? __pfx_lock_acquire+0x10/0x10 [ 61.047111] ? __pfx_mmap_region+0x10/0x10 [ 61.047622] ? security_mmap_addr+0x7d/0xa0 [ 61.048117] ? get_unmapped_area+0x1f5/0x3f0 [ 61.048637] do_mmap+0x854/0xf00 [ 61.049052] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.049517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.050046] ksys_mmap_pgoff+0x3af/0x500 [ 61.050533] do_syscall_64+0x3f/0x90 [ 61.050981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.051595] RIP: 0033:0x7f1b60725d82 [ 61.052030] 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 [ 61.054004] RSP: 002b:00007fff742c51c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.054851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b60725d82 [ 61.055661] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b5fb5f000 [ 61.056450] RBP: 00007f1b5fb5f000 R08: 0000000000000009 R09: 0000000000001000 [ 61.057237] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b96bf6d90 [ 61.058022] R13: 00007fff742c51e0 R14: 00007fff742c5210 R15: 00007fff742c5570 [ 61.058822] [ 61.059097] [ 61.059303] Allocated by task 213: [ 61.059712] kasan_save_stack+0x22/0x50 [ 61.060190] kasan_set_track+0x25/0x30 [ 61.060658] __kasan_slab_alloc+0x59/0x70 [ 61.061148] kmem_cache_alloc+0x16b/0x370 [ 61.061630] vm_area_dup+0x20/0x160 [ 61.062055] __split_vma+0x170/0x950 [ 61.062492] split_vma+0xc6/0x110 [ 61.062906] mprotect_fixup+0x8d2/0xb30 [ 61.063380] do_mprotect_pkey+0x87e/0xd40 [ 61.063886] __x64_sys_mprotect+0x78/0xc0 [ 61.064371] do_syscall_64+0x3f/0x90 [ 61.064817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.065418] [ 61.065621] Freed by task 213: [ 61.065988] kasan_save_stack+0x22/0x50 [ 61.066458] kasan_set_track+0x25/0x30 [ 61.066922] kasan_save_free_info+0x2b/0x50 [ 61.067433] __kasan_slab_free+0x10a/0x190 [ 61.067937] kmem_cache_free+0x10d/0x4d0 [ 61.068416] rcu_core+0x8c8/0x2860 [ 61.068832] __do_softirq+0x1b7/0x7d4 [ 61.069283] [ 61.069491] Last potentially related work creation: [ 61.070040] kasan_save_stack+0x22/0x50 [ 61.070516] __kasan_record_aux_stack+0x8e/0xa0 [ 61.071056] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.071666] remove_vma+0x139/0x170 [ 61.072090] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.072618] do_vmi_munmap+0x1f1/0x2b0 [ 61.073075] __vm_munmap+0x138/0x3a0 [ 61.073510] __x64_sys_munmap+0x59/0x80 [ 61.073977] do_syscall_64+0x3f/0x90 [ 61.074423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.075024] [ 61.075229] The buggy address belongs to the object at ffff888017b3d740 [ 61.075229] which belongs to the cache vm_area_struct of size 168 [ 61.076617] The buggy address is located 88 bytes inside of [ 61.076617] freed 168-byte region [ffff888017b3d740, ffff888017b3d7e8) [ 61.077969] [ 61.078177] The buggy address belongs to the physical page: [ 61.078796] page:0000000045ed90dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17b3d [ 61.079822] memcg:ffff88800e705501 [ 61.080224] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.080828] page_type: 0xffffffff() [ 61.081253] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.082110] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e705501 [ 61.082955] page dumped because: kasan: bad access detected [ 61.083590] [ 61.083795] Memory state around the buggy address: [ 61.084336] ffff888017b3d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.085135] ffff888017b3d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.085929] >ffff888017b3d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.086717] ^ [ 61.087175] ffff888017b3d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.087975] ffff888017b3d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.088769] ================================================================== [ 61.089957] Disabling lock debugging due to kernel taint [ 63.003597] BUG: Bad rss-counter state mm:00000000310d8be0 type:MM_FILEPAGES val:33 [ 63.004594] BUG: Bad rss-counter state mm:00000000310d8be0 type:MM_ANONPAGES val:22 [ 63.447011] BUG: Bad rss-counter state mm:000000006f6f3001 type:MM_FILEPAGES val:33 [ 63.447817] BUG: Bad rss-counter state mm:000000006f6f3001 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29014' (ECDSA) to the list of known hosts. 2023/06/19 15:21:11 fuzzer started 2023/06/19 15:21:11 dialing manager at localhost:44161 2023/06/19 15:21:11 checking machine... 2023/06/19 15:21:11 checking revisions... [ 64.088448] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:21:12 testing simple program... [ 64.128108] cgroup: Unknown subsys name 'net' [ 64.171725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:21:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88801981f938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007fef3e2eb900 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=00007ffcf75df000 CR3=000000001034a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f3cfbdcdf20 CR3=000000000d842000 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=b7f77565e5a58598a046bb9b19c832cc XMM02=2c67c8bc2e329bc3000000000011e000 XMM03=fb795ef6d65770560000000000124900 XMM04=d2aa3d85dfef923a00000000000ae988 XMM05=19e9129bd510f23500000000001344f0 XMM06=4fda316b135da52b0000000000134378 XMM07=e042d86d42eb936e0000000000124b80 XMM08=d57907763aa32217000000000011e060 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000