[ 27.416707] BUG: Bad rss-counter state mm:00000000e6933029 type:MM_FILEPAGES val:33 [ 27.417915] BUG: Bad rss-counter state mm:00000000e6933029 type:MM_ANONPAGES val:22 [ 27.453317] ================================================================== [ 27.454357] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.455448] Read of size 8 at addr ffff8880095f6c20 by task sshd/220 [ 27.456414] [ 27.456749] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.457739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.458887] Call Trace: [ 27.459245] [ 27.459573] dump_stack_lvl+0x91/0xf0 [ 27.460155] print_report+0xcc/0x620 [ 27.460722] ? __virt_addr_valid+0x102/0x340 [ 27.461383] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.462220] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.463103] kasan_report+0xbe/0xf0 [ 27.463719] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.464560] vma_interval_tree_remove+0xc75/0xec0 [ 27.465426] vma_prepare+0xc54/0x11a0 [ 27.466023] __split_vma+0x5af/0x950 [ 27.466603] ? __pfx___split_vma+0x10/0x10 [ 27.467261] ? find_held_lock+0x2c/0x110 [ 27.467966] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.468808] ? lock_is_held_type+0x9f/0x120 [ 27.469492] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.470470] ? mtree_range_walk+0x632/0x900 [ 27.471079] ? mas_walk+0x5c7/0x7c0 [ 27.471555] do_vmi_munmap+0x1f1/0x2b0 [ 27.472132] mmap_region+0x1f9/0x2660 [ 27.472612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.473127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.473922] ? __pfx_lock_acquire+0x10/0x10 [ 27.474551] ? __pfx_mmap_region+0x10/0x10 [ 27.475140] ? security_mmap_addr+0x7d/0xa0 [ 27.475672] ? get_unmapped_area+0x1f5/0x3f0 [ 27.476223] do_mmap+0x854/0xf00 [ 27.476663] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.477175] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.477752] ksys_mmap_pgoff+0x3af/0x500 [ 27.478260] do_syscall_64+0x3f/0x90 [ 27.478744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.479386] RIP: 0033:0x7f91f9f6cd82 [ 27.479842] 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 [ 27.481954] RSP: 002b:00007ffed7277c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.482852] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91f9f6cd82 [ 27.483696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91f93a6000 [ 27.484539] RBP: 00007f91f93a6000 R08: 0000000000000009 R09: 0000000000001000 [ 27.485407] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b39bdfec0 [ 27.486253] R13: 00007ffed7277c90 R14: 00007ffed7277cc0 R15: 00007ffed7278020 [ 27.487145] [ 27.487444] [ 27.487656] Allocated by task 213: [ 27.488085] kasan_save_stack+0x22/0x50 [ 27.488592] kasan_set_track+0x25/0x30 [ 27.489095] __kasan_slab_alloc+0x59/0x70 [ 27.489622] kmem_cache_alloc+0x16b/0x370 [ 27.490135] vm_area_dup+0x20/0x160 [ 27.490598] __split_vma+0x170/0x950 [ 27.491066] split_vma+0xc6/0x110 [ 27.491514] mprotect_fixup+0x8d2/0xb30 [ 27.492020] do_mprotect_pkey+0x87e/0xd40 [ 27.492544] __x64_sys_mprotect+0x78/0xc0 [ 27.493087] do_syscall_64+0x3f/0x90 [ 27.493558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.494210] [ 27.494423] Freed by task 213: [ 27.494820] kasan_save_stack+0x22/0x50 [ 27.495326] kasan_set_track+0x25/0x30 [ 27.495821] kasan_save_free_info+0x2b/0x50 [ 27.496350] __kasan_slab_free+0x10a/0x190 [ 27.496882] kmem_cache_free+0x10d/0x4d0 [ 27.497403] rcu_core+0x8c8/0x2860 [ 27.497854] __do_softirq+0x1b7/0x7d4 [ 27.498393] [ 27.498612] Last potentially related work creation: [ 27.499193] kasan_save_stack+0x22/0x50 [ 27.499700] __kasan_record_aux_stack+0x8e/0xa0 [ 27.500275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.500913] remove_vma+0x139/0x170 [ 27.501388] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.501951] do_vmi_munmap+0x1f1/0x2b0 [ 27.502439] __vm_munmap+0x138/0x3a0 [ 27.502902] __x64_sys_munmap+0x59/0x80 [ 27.503397] do_syscall_64+0x3f/0x90 [ 27.503869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.504509] [ 27.504729] Second to last potentially related work creation: [ 27.505419] kasan_save_stack+0x22/0x50 [ 27.505925] __kasan_record_aux_stack+0x8e/0xa0 [ 27.506494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.507139] remove_vma+0x139/0x170 [ 27.507589] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.508144] do_vmi_munmap+0x1f1/0x2b0 [ 27.508632] __vm_munmap+0x138/0x3a0 [ 27.509111] __x64_sys_munmap+0x59/0x80 [ 27.509617] do_syscall_64+0x3f/0x90 [ 27.510095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.510736] [ 27.510952] The buggy address belongs to the object at ffff8880095f6bc8 [ 27.510952] which belongs to the cache vm_area_struct of size 168 [ 27.512418] The buggy address is located 88 bytes inside of [ 27.512418] freed 168-byte region [ffff8880095f6bc8, ffff8880095f6c70) [ 27.513850] [ 27.514069] The buggy address belongs to the physical page: [ 27.514722] page:00000000e9e1b0ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95f6 [ 27.515800] memcg:ffff88800eaf2201 [ 27.516228] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.516877] page_type: 0xffffffff() [ 27.517343] raw: 0100000000000200 ffff88800879fc80 ffffea000036c3c0 dead000000000006 [ 27.518260] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaf2201 [ 27.519159] page dumped because: kasan: bad access detected [ 27.519820] [ 27.520040] Memory state around the buggy address: [ 27.520611] ffff8880095f6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.521501] ffff8880095f6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 27.522362] >ffff8880095f6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 27.523213] ^ [ 27.523744] ffff8880095f6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 27.524590] ffff8880095f6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 27.525448] ================================================================== [ 27.526373] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.664699] BUG: Bad rss-counter state mm:00000000f74bd4b9 type:MM_FILEPAGES val:33 [ 29.665968] BUG: Bad rss-counter state mm:00000000f74bd4b9 type:MM_ANONPAGES val:22 [ 30.177213] BUG: Bad rss-counter state mm:00000000221b5822 type:MM_FILEPAGES val:33 [ 30.178240] BUG: Bad rss-counter state mm:00000000221b5822 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13209' (ECDSA) to the list of known hosts. 2023/06/19 16:00:47 fuzzer started 2023/06/19 16:00:47 dialing manager at localhost:44161 2023/06/19 16:00:47 checking machine... 2023/06/19 16:00:47 checking revisions... [ 30.971804] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:00:47 testing simple program... [ 31.020675] cgroup: Unknown subsys name 'net' [ 31.076497] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe78d75978 CR3=0000000005482000 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=00007f8b37ec0510000055efc7d21790 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 info registers vcpu 1 RAX=ffffffff849384a0 RBX=ffff88800f51c280 RCX=1ffffffff0927099 RDX=dffffc0000000000 RSI=ffffffff8186492b RDI=ffffffff849384c8 RBP=ffff88800f4c4000 RSP=ffff8880069dfd68 R8 =0000000000000000 R9 =ffff88800f51c418 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007fa164030ca0 R14=1ffff11000d3bfb2 R15=ffff8880069dfec8 RIP=ffffffff81864958 RFL=00000286 [--S--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 00007fa17b6bd700 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=00007f52ff858da0 CR3=000000000d9ec000 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=2036343a30303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000