[ 30.420499] BUG: Bad rss-counter state mm:000000003619559c type:MM_FILEPAGES val:33 [ 30.421514] BUG: Bad rss-counter state mm:000000003619559c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.599924] ================================================================== [ 30.600851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.601864] Read of size 8 at addr ffff888016c9a140 by task sshd/218 [ 30.602671] [ 30.602901] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.603802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.604819] Call Trace: [ 30.605156] [ 30.605450] dump_stack_lvl+0x91/0xf0 [ 30.605971] print_report+0xcc/0x620 [ 30.606502] ? __virt_addr_valid+0x102/0x340 [ 30.607097] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607756] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608433] kasan_report+0xbe/0xf0 [ 30.608935] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.609591] vma_interval_tree_remove+0xc75/0xec0 [ 30.610254] vma_prepare+0xc54/0x11a0 [ 30.610764] __split_vma+0x5af/0x950 [ 30.611264] ? __pfx___split_vma+0x10/0x10 [ 30.611819] ? find_held_lock+0x2c/0x110 [ 30.612362] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.612958] ? lock_is_held_type+0x9f/0x120 [ 30.613525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.614168] ? mtree_range_walk+0x632/0x900 [ 30.614778] ? mas_walk+0x5c7/0x7c0 [ 30.615274] do_vmi_munmap+0x1f1/0x2b0 [ 30.615793] mmap_region+0x1f9/0x2660 [ 30.616316] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.616852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.617613] ? __pfx_lock_acquire+0x10/0x10 [ 30.618167] ? __pfx_mmap_region+0x10/0x10 [ 30.618737] ? security_mmap_addr+0x7d/0xa0 [ 30.619304] ? get_unmapped_area+0x1f5/0x3f0 [ 30.619891] do_mmap+0x854/0xf00 [ 30.620352] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.620872] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.621475] ksys_mmap_pgoff+0x3af/0x500 [ 30.621998] do_syscall_64+0x3f/0x90 [ 30.622517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.623187] RIP: 0033:0x7fbb41055d82 [ 30.623674] 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 [ 30.625918] RSP: 002b:00007ffd0cbd43e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.626878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb41055d82 [ 30.627762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb4048f000 [ 30.628650] RBP: 00007fbb4048f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.629524] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e35de9ec0 [ 30.630419] R13: 00007ffd0cbd4400 R14: 00007ffd0cbd4430 R15: 00007ffd0cbd4790 [ 30.631311] [ 30.631611] [ 30.631832] Allocated by task 211: [ 30.632285] kasan_save_stack+0x22/0x50 [ 30.632817] kasan_set_track+0x25/0x30 [ 30.633332] __kasan_slab_alloc+0x59/0x70 [ 30.633884] kmem_cache_alloc+0x16b/0x370 [ 30.634442] vm_area_dup+0x20/0x160 [ 30.634908] __split_vma+0x170/0x950 [ 30.635397] split_vma+0xc6/0x110 [ 30.635847] mprotect_fixup+0x8d2/0xb30 [ 30.636358] do_mprotect_pkey+0x87e/0xd40 [ 30.636893] __x64_sys_mprotect+0x78/0xc0 [ 30.637433] do_syscall_64+0x3f/0x90 [ 30.637916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.638590] [ 30.638814] Freed by task 211: [ 30.639223] kasan_save_stack+0x22/0x50 [ 30.639745] kasan_set_track+0x25/0x30 [ 30.640254] kasan_save_free_info+0x2b/0x50 [ 30.640798] __kasan_slab_free+0x10a/0x190 [ 30.641346] kmem_cache_free+0x10d/0x4d0 [ 30.641862] rcu_core+0x8c8/0x2860 [ 30.642325] __do_softirq+0x1b7/0x7d4 [ 30.642820] [ 30.643042] Last potentially related work creation: [ 30.643648] kasan_save_stack+0x22/0x50 [ 30.644172] __kasan_record_aux_stack+0x8e/0xa0 [ 30.644765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.645427] remove_vma+0x139/0x170 [ 30.645890] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.646464] do_vmi_munmap+0x1f1/0x2b0 [ 30.646971] __vm_munmap+0x138/0x3a0 [ 30.647450] __x64_sys_munmap+0x59/0x80 [ 30.647965] do_syscall_64+0x3f/0x90 [ 30.648474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.649140] [ 30.649359] The buggy address belongs to the object at ffff888016c9a0e8 [ 30.649359] which belongs to the cache vm_area_struct of size 168 [ 30.650885] The buggy address is located 88 bytes inside of [ 30.650885] freed 168-byte region [ffff888016c9a0e8, ffff888016c9a190) [ 30.652351] [ 30.652567] The buggy address belongs to the physical page: [ 30.653229] page:0000000000763929 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c9a [ 30.654349] memcg:ffff88800ece3101 [ 30.654792] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.655442] page_type: 0xffffffff() [ 30.655906] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.656832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ece3101 [ 30.657746] page dumped because: kasan: bad access detected [ 30.658433] [ 30.658653] Memory state around the buggy address: [ 30.659240] ffff888016c9a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.660112] ffff888016c9a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.660973] >ffff888016c9a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.661837] ^ [ 30.662500] ffff888016c9a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.663356] ffff888016c9a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.664209] ================================================================== [ 30.665487] Disabling lock debugging due to kernel taint [ 33.495526] BUG: Bad rss-counter state mm:000000003887c388 type:MM_FILEPAGES val:33 [ 33.496690] BUG: Bad rss-counter state mm:000000003887c388 type:MM_ANONPAGES val:22 [ 33.867193] BUG: Bad rss-counter state mm:000000009f3a7d89 type:MM_FILEPAGES val:33 [ 33.868553] BUG: Bad rss-counter state mm:000000009f3a7d89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64350' (ECDSA) to the list of known hosts. 2023/06/20 10:41:03 fuzzer started 2023/06/20 10:41:03 dialing manager at localhost:44161 2023/06/20 10:41:03 checking machine... 2023/06/20 10:41:03 checking revisions... [ 34.624695] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:41:03 testing simple program... [ 34.668354] cgroup: Unknown subsys name 'net' [ 34.733496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:40:56 Registers: info registers vcpu 0 RAX=ffff88800fbaac80 RBX=0000000000000053 RCX=0000000000000000 RDX=1ffff11001f755aa RSI=ffffffff83698637 RDI=ffff88800fbaad50 RBP=0000000000000053 RSP=ffff88801419f8e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000053 R11=0000000000000000 R12=ffff88800e546c00 R13=0000000000000053 R14=ffff88801419fe70 R15=ffff88800fbaac80 RIP=ffffffff83698676 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 00007fddc3b07900 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=00007fddc3026000 CR3=000000000f152000 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=cdd9e2c20dc576870d45c444bf6a226d XMM02=eff9b2d0a8fce9cb000000000011f108 XMM03=2c67c8bc2e329bc3000000000011f230 XMM04=46485092194055a200000000000ae988 XMM05=2ad4bf606ea7014a0000000000133e48 XMM06=bdf2e299e47b49d500000000001328c8 XMM07=fb795ef6d65770560000000000122ed8 XMM08=2c67c8bc2e329bc3000000000011f230 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000246 RBX=0000000000000201 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000201 RDI=ffffffff83c5ecc4 RBP=ffffffff83c5ecc4 RSP=ffff888016fff570 R8 =0000000000000001 R9 =ffffed1001f256ac R10=ffff88800f92b563 R11=00000afc00000afc R12=0000000000000001 R13=0000000000000000 R14=ffff888016fff728 R15=ffff88800dfd8a00 RIP=ffffffff8118db73 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 00007f7d55f23900 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=00007ffef981c000 CR3=000000000e4f2000 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