[ 31.358589] BUG: Bad rss-counter state mm:0000000021203b58 type:MM_FILEPAGES val:33 [ 31.359770] BUG: Bad rss-counter state mm:0000000021203b58 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.524254] ================================================================== [ 31.525359] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.526517] Read of size 8 at addr ffff88800ef1cd08 by task sshd/221 [ 31.527530] [ 31.527750] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.528615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.529606] Call Trace: [ 31.529926] [ 31.530210] dump_stack_lvl+0x91/0xf0 [ 31.530725] print_report+0xcc/0x620 [ 31.531229] ? __virt_addr_valid+0x102/0x340 [ 31.531799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.532424] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.533037] kasan_report+0xbe/0xf0 [ 31.533511] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.534128] vma_interval_tree_remove+0xc75/0xec0 [ 31.534768] vma_prepare+0xc54/0x11a0 [ 31.535284] __split_vma+0x5af/0x950 [ 31.535763] ? __pfx___split_vma+0x10/0x10 [ 31.536299] ? find_held_lock+0x2c/0x110 [ 31.536819] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.537399] ? lock_is_held_type+0x9f/0x120 [ 31.537937] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.538572] ? mtree_range_walk+0x632/0x900 [ 31.539133] ? mas_walk+0x5c7/0x7c0 [ 31.539652] do_vmi_munmap+0x1f1/0x2b0 [ 31.540146] mmap_region+0x1f9/0x2660 [ 31.540631] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.541148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.541869] ? __pfx_lock_acquire+0x10/0x10 [ 31.542438] ? __pfx_mmap_region+0x10/0x10 [ 31.542965] ? security_mmap_addr+0x7d/0xa0 [ 31.543522] ? get_unmapped_area+0x1f5/0x3f0 [ 31.544072] do_mmap+0x854/0xf00 [ 31.544510] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.545007] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.545569] ksys_mmap_pgoff+0x3af/0x500 [ 31.546074] do_syscall_64+0x3f/0x90 [ 31.546584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547268] RIP: 0033:0x7f2eb21c5d82 [ 31.547761] 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 [ 31.549890] RSP: 002b:00007ffd06725ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.550801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2eb21c5d82 [ 31.551696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2eb15ff000 [ 31.552545] RBP: 00007f2eb15ff000 R08: 0000000000000009 R09: 0000000000001000 [ 31.553439] R10: 0000000000000812 R11: 0000000000000206 R12: 000056133a580ec0 [ 31.554343] R13: 00007ffd06725cc0 R14: 00007ffd06725cf0 R15: 00007ffd06726050 [ 31.555240] [ 31.555549] [ 31.555768] Allocated by task 214: [ 31.556204] kasan_save_stack+0x22/0x50 [ 31.556715] kasan_set_track+0x25/0x30 [ 31.557214] __kasan_slab_alloc+0x59/0x70 [ 31.557741] kmem_cache_alloc+0x16b/0x370 [ 31.558255] vm_area_dup+0x20/0x160 [ 31.558747] __split_vma+0x170/0x950 [ 31.559247] split_vma+0xc6/0x110 [ 31.559705] mprotect_fixup+0x8d2/0xb30 [ 31.560261] do_mprotect_pkey+0x87e/0xd40 [ 31.560794] __x64_sys_mprotect+0x78/0xc0 [ 31.561319] do_syscall_64+0x3f/0x90 [ 31.561801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.562473] [ 31.562694] Freed by task 205: [ 31.563084] kasan_save_stack+0x22/0x50 [ 31.563662] kasan_set_track+0x25/0x30 [ 31.564169] kasan_save_free_info+0x2b/0x50 [ 31.564750] __kasan_slab_free+0x10a/0x190 [ 31.565332] kmem_cache_free+0x10d/0x4d0 [ 31.565855] rcu_core+0x8c8/0x2860 [ 31.566363] __do_softirq+0x1b7/0x7d4 [ 31.566921] [ 31.567170] Last potentially related work creation: [ 31.567790] kasan_save_stack+0x22/0x50 [ 31.568331] __kasan_record_aux_stack+0x8e/0xa0 [ 31.568906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.569588] remove_vma+0x139/0x170 [ 31.570042] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.570663] do_vmi_munmap+0x1f1/0x2b0 [ 31.571153] __vm_munmap+0x138/0x3a0 [ 31.571630] __x64_sys_munmap+0x59/0x80 [ 31.572134] do_syscall_64+0x3f/0x90 [ 31.572651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.573299] [ 31.573514] Second to last potentially related work creation: [ 31.574208] kasan_save_stack+0x22/0x50 [ 31.574725] __kasan_record_aux_stack+0x8e/0xa0 [ 31.575306] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.575950] remove_vma+0x139/0x170 [ 31.576443] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.577004] do_vmi_munmap+0x1f1/0x2b0 [ 31.577494] mmap_region+0x1f9/0x2660 [ 31.577981] do_mmap+0x854/0xf00 [ 31.578439] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.578940] ksys_mmap_pgoff+0x3af/0x500 [ 31.579449] do_syscall_64+0x3f/0x90 [ 31.579930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.580620] [ 31.580838] The buggy address belongs to the object at ffff88800ef1ccb0 [ 31.580838] which belongs to the cache vm_area_struct of size 168 [ 31.582336] The buggy address is located 88 bytes inside of [ 31.582336] freed 168-byte region [ffff88800ef1ccb0, ffff88800ef1cd58) [ 31.583765] [ 31.583986] The buggy address belongs to the physical page: [ 31.584682] page:00000000a6cdf080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef1c [ 31.585774] memcg:ffff88800e8b8601 [ 31.586210] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.586960] page_type: 0xffffffff() [ 31.587417] raw: 0100000000000200 ffff8880087a0c80 ffffea0000406140 dead000000000003 [ 31.588393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8b8601 [ 31.589323] page dumped because: kasan: bad access detected [ 31.589999] [ 31.590224] Memory state around the buggy address: [ 31.590839] ffff88800ef1cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.591715] ffff88800ef1cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.592613] >ffff88800ef1cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.593475] ^ [ 31.593925] ffff88800ef1cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.594820] ffff88800ef1ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.595691] ================================================================== [ 31.596868] Disabling lock debugging due to kernel taint [ 33.488986] BUG: Bad rss-counter state mm:00000000ab4465e9 type:MM_FILEPAGES val:33 [ 33.489775] BUG: Bad rss-counter state mm:00000000ab4465e9 type:MM_ANONPAGES val:22 [ 33.985623] BUG: Bad rss-counter state mm:00000000d30274c7 type:MM_FILEPAGES val:33 [ 33.986664] BUG: Bad rss-counter state mm:00000000d30274c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24059' (ECDSA) to the list of known hosts. 2023/06/21 00:49:48 fuzzer started 2023/06/21 00:49:48 dialing manager at localhost:36067 2023/06/21 00:49:48 checking machine... 2023/06/21 00:49:48 checking revisions... [ 34.708745] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:49:48 testing simple program... [ 34.764684] cgroup: Unknown subsys name 'net' [ 34.844176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:49:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100378bf5d RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88801bc5fac8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffffffff85ba4d70 R15=0000000000000000 RIP=ffffffff8180f135 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 00007fb2e80e9900 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=00007fb2e86a0618 CR3=0000000009e6e000 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=563412feff00545000000000000080fe 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=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=00007f34c03d8de0 CR3=000000000ecb0000 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=68fa682b956c09a71949af7ac77e8c81 XMM02=000000000011c048ec2efd57dc4c00df XMM03=000000000012227062fea502f07f5fd6 XMM04=a62b0a9a5d5042c200000000000ae988 XMM05=7eec760b8df32e2300000000001339c0 XMM06=c291bd5c70af25b90000000000133048 XMM07=e042d86d42eb936e0000000000122548 XMM08=62fea502f07f5fd6000000000011c0a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000