syzkaller login: [ 31.777501] BUG: Bad rss-counter state mm:00000000955a4816 type:MM_FILEPAGES val:33 [ 31.778581] BUG: Bad rss-counter state mm:00000000955a4816 type:MM_ANONPAGES val:22 [ 31.944006] ================================================================== [ 31.944921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.945860] Read of size 8 at addr ffff88800ee9ec20 by task sshd/221 [ 31.946628] [ 31.946904] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.947783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.948775] Call Trace: [ 31.949113] [ 31.949403] dump_stack_lvl+0x91/0xf0 [ 31.949900] print_report+0xcc/0x620 [ 31.950390] ? __virt_addr_valid+0x102/0x340 [ 31.950946] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.951572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.952227] kasan_report+0xbe/0xf0 [ 31.952716] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.953345] vma_interval_tree_remove+0xc75/0xec0 [ 31.953961] vma_prepare+0xc54/0x11a0 [ 31.954454] __split_vma+0x5af/0x950 [ 31.954937] ? __pfx___split_vma+0x10/0x10 [ 31.955469] ? find_held_lock+0x2c/0x110 [ 31.956022] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.956603] ? lock_is_held_type+0x9f/0x120 [ 31.957144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.957758] ? mtree_range_walk+0x632/0x900 [ 31.958319] ? mas_walk+0x5c7/0x7c0 [ 31.958808] do_vmi_munmap+0x1f1/0x2b0 [ 31.959303] mmap_region+0x1f9/0x2660 [ 31.959802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.960329] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.961220] ? __pfx_lock_acquire+0x10/0x10 [ 31.961904] ? __pfx_mmap_region+0x10/0x10 [ 31.962591] ? security_mmap_addr+0x7d/0xa0 [ 31.963285] ? get_unmapped_area+0x1f5/0x3f0 [ 31.964018] do_mmap+0x854/0xf00 [ 31.964581] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.965213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.965933] ksys_mmap_pgoff+0x3af/0x500 [ 31.966585] do_syscall_64+0x3f/0x90 [ 31.967209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.968066] RIP: 0033:0x7f9fd59b8d82 [ 31.968656] 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 [ 31.971100] RSP: 002b:00007ffcf49a5f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.972037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fd59b8d82 [ 31.972884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fd4df2000 [ 31.973737] RBP: 00007f9fd4df2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.974581] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c094098b20 [ 31.975429] R13: 00007ffcf49a5f90 R14: 00007ffcf49a5fc0 R15: 00007ffcf49a6320 [ 31.976302] [ 31.976597] [ 31.976819] Allocated by task 214: [ 31.977251] kasan_save_stack+0x22/0x50 [ 31.977762] kasan_set_track+0x25/0x30 [ 31.978261] __kasan_slab_alloc+0x59/0x70 [ 31.978790] kmem_cache_alloc+0x16b/0x370 [ 31.979312] vm_area_dup+0x20/0x160 [ 31.979775] __split_vma+0x170/0x950 [ 31.980298] split_vma+0xc6/0x110 [ 31.980766] mprotect_fixup+0x8d2/0xb30 [ 31.981306] do_mprotect_pkey+0x87e/0xd40 [ 31.981860] __x64_sys_mprotect+0x78/0xc0 [ 31.982414] do_syscall_64+0x3f/0x90 [ 31.982934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.983619] [ 31.983855] Freed by task 19: [ 31.984266] kasan_save_stack+0x22/0x50 [ 31.984801] kasan_set_track+0x25/0x30 [ 31.985329] kasan_save_free_info+0x2b/0x50 [ 31.985900] __kasan_slab_free+0x10a/0x190 [ 31.986466] kmem_cache_free+0x10d/0x4d0 [ 31.986999] rcu_core+0x8c8/0x2860 [ 31.987468] __do_softirq+0x1b7/0x7d4 [ 31.987989] [ 31.988216] Last potentially related work creation: [ 31.988830] kasan_save_stack+0x22/0x50 [ 31.989362] __kasan_record_aux_stack+0x8e/0xa0 [ 31.989965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.990653] remove_vma+0x139/0x170 [ 31.991131] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.991724] do_vmi_munmap+0x1f1/0x2b0 [ 31.992262] __vm_munmap+0x138/0x3a0 [ 31.992757] __x64_sys_munmap+0x59/0x80 [ 31.993287] do_syscall_64+0x3f/0x90 [ 31.993791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.994473] [ 31.994702] Second to last potentially related work creation: [ 31.995426] kasan_save_stack+0x22/0x50 [ 31.995968] __kasan_record_aux_stack+0x8e/0xa0 [ 31.996577] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.997256] remove_vma+0x139/0x170 [ 31.997734] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.998329] do_vmi_munmap+0x1f1/0x2b0 [ 31.998844] mmap_region+0x1f9/0x2660 [ 31.999349] do_mmap+0x854/0xf00 [ 31.999813] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.000330] ksys_mmap_pgoff+0x3af/0x500 [ 32.000864] do_syscall_64+0x3f/0x90 [ 32.001361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.002058] [ 32.002283] The buggy address belongs to the object at ffff88800ee9ebc8 [ 32.002283] which belongs to the cache vm_area_struct of size 168 [ 32.003858] The buggy address is located 88 bytes inside of [ 32.003858] freed 168-byte region [ffff88800ee9ebc8, ffff88800ee9ec70) [ 32.005344] [ 32.005570] The buggy address belongs to the physical page: [ 32.006265] page:00000000f0125934 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee9e [ 32.007420] memcg:ffff888013050d01 [ 32.007883] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.008563] page_type: 0xffffffff() [ 32.009041] raw: 0100000000000200 ffff8880087a0c80 ffffea000039bcc0 dead000000000008 [ 32.010011] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013050d01 [ 32.010963] page dumped because: kasan: bad access detected [ 32.011657] [ 32.011894] Memory state around the buggy address: [ 32.012504] ffff88800ee9eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.013402] ffff88800ee9eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.014300] >ffff88800ee9ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.015205] ^ [ 32.015760] ffff88800ee9ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.016679] ffff88800ee9ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.017594] ================================================================== [ 32.018787] Disabling lock debugging due to kernel taint [ 33.982258] BUG: Bad rss-counter state mm:00000000be4e9db8 type:MM_FILEPAGES val:33 [ 33.983643] BUG: Bad rss-counter state mm:00000000be4e9db8 type:MM_ANONPAGES val:22 [ 34.467859] BUG: Bad rss-counter state mm:0000000070d9ecc9 type:MM_FILEPAGES val:33 [ 34.468948] BUG: Bad rss-counter state mm:0000000070d9ecc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61986' (ECDSA) to the list of known hosts. 2023/06/21 00:40:42 fuzzer started 2023/06/21 00:40:42 dialing manager at localhost:36067 2023/06/21 00:40:42 checking machine... 2023/06/21 00:40:42 checking revisions... [ 35.230677] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:40:42 testing simple program... [ 35.274255] cgroup: Unknown subsys name 'net' [ 35.323443] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:40:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002de3efd RSP=ffff888016f1f7c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ff00545000000000 R12=ffff88800ecbd018 R13=ffffffff818468a3 R14=ffffffff8367562f R15=00000000000000e8 RIP=ffffffff8135b960 RFL=00000016 [----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 00007f5a22ee5900 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=00007f5a2349c618 CR3=000000000ec6a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f7796f95c80 CR3=00000000098f6000 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=92802bfd5d932bb38e400a8c535f136c XMM02=2c67c8bc2e329bc3000000000011ae90 XMM03=fb795ef6d65770560000000000122738 XMM04=cf75db9c2df859b500000000000ae988 XMM05=e4cb8bb95a7664b600000000001338e8 XMM06=82d18a9f74506d900000000000132750 XMM07=e042d86d42eb936e00000000001229b8 XMM08=e4716ab81ae4fa4c000000000011aef0 XMM09=00000000000000000000000000000000 XMM10=00200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000