[ 31.236172] BUG: Bad rss-counter state mm:0000000073bf987a type:MM_FILEPAGES val:33 [ 31.237310] BUG: Bad rss-counter state mm:0000000073bf987a type:MM_ANONPAGES val:22 [ 31.394554] ================================================================== [ 31.395620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.396750] Read of size 8 at addr ffff88800fd7d5c8 by task sshd/218 [ 31.397699] [ 31.397924] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.398792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.399793] Call Trace: [ 31.400116] [ 31.400404] dump_stack_lvl+0x91/0xf0 [ 31.400911] print_report+0xcc/0x620 [ 31.401398] ? __virt_addr_valid+0x102/0x340 [ 31.401954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.402584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.403221] kasan_report+0xbe/0xf0 [ 31.403704] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404329] vma_interval_tree_remove+0xc75/0xec0 [ 31.404936] vma_prepare+0xc54/0x11a0 [ 31.405425] __split_vma+0x5af/0x950 [ 31.405904] ? __pfx___split_vma+0x10/0x10 [ 31.406431] ? find_held_lock+0x2c/0x110 [ 31.406952] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.407525] ? lock_is_held_type+0x9f/0x120 [ 31.408071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.408705] ? mtree_range_walk+0x632/0x900 [ 31.409263] ? mas_walk+0x5c7/0x7c0 [ 31.409754] do_vmi_munmap+0x1f1/0x2b0 [ 31.410254] mmap_region+0x1f9/0x2660 [ 31.410735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.411257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.411972] ? __pfx_lock_acquire+0x10/0x10 [ 31.412511] ? __pfx_mmap_region+0x10/0x10 [ 31.413105] ? security_mmap_addr+0x7d/0xa0 [ 31.413647] ? get_unmapped_area+0x1f5/0x3f0 [ 31.414202] do_mmap+0x854/0xf00 [ 31.414638] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.415130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.415694] ksys_mmap_pgoff+0x3af/0x500 [ 31.416203] do_syscall_64+0x3f/0x90 [ 31.416713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.417360] RIP: 0033:0x7f2a56ec3d82 [ 31.417822] 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 [ 31.419943] RSP: 002b:00007fffabc30ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.420852] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a56ec3d82 [ 31.421691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a562fd000 [ 31.422553] RBP: 00007f2a562fd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.423394] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb61b64f70 [ 31.424238] R13: 00007fffabc30d00 R14: 00007fffabc30d30 R15: 00007fffabc31090 [ 31.425114] [ 31.425406] [ 31.425621] Allocated by task 211: [ 31.426044] kasan_save_stack+0x22/0x50 [ 31.426545] kasan_set_track+0x25/0x30 [ 31.427041] __kasan_slab_alloc+0x59/0x70 [ 31.427560] kmem_cache_alloc+0x16b/0x370 [ 31.428076] vm_area_dup+0x20/0x160 [ 31.428526] __split_vma+0x170/0x950 [ 31.429000] split_vma+0xc6/0x110 [ 31.429452] mprotect_fixup+0x8d2/0xb30 [ 31.429955] do_mprotect_pkey+0x87e/0xd40 [ 31.430496] __x64_sys_mprotect+0x78/0xc0 [ 31.431043] do_syscall_64+0x3f/0x90 [ 31.431527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.432169] [ 31.432390] Freed by task 19: [ 31.432789] kasan_save_stack+0x22/0x50 [ 31.433298] kasan_set_track+0x25/0x30 [ 31.433796] kasan_save_free_info+0x2b/0x50 [ 31.434336] __kasan_slab_free+0x10a/0x190 [ 31.434880] kmem_cache_free+0x10d/0x4d0 [ 31.435393] rcu_core+0x8c8/0x2860 [ 31.435839] __do_softirq+0x1b7/0x7d4 [ 31.436346] [ 31.436572] Last potentially related work creation: [ 31.437170] kasan_save_stack+0x22/0x50 [ 31.437679] __kasan_record_aux_stack+0x8e/0xa0 [ 31.438264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.438913] remove_vma+0x139/0x170 [ 31.439372] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.439941] do_vmi_munmap+0x1f1/0x2b0 [ 31.440438] __vm_munmap+0x138/0x3a0 [ 31.440927] __x64_sys_munmap+0x59/0x80 [ 31.441431] do_syscall_64+0x3f/0x90 [ 31.441921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.442586] [ 31.442808] The buggy address belongs to the object at ffff88800fd7d570 [ 31.442808] which belongs to the cache vm_area_struct of size 168 [ 31.444288] The buggy address is located 88 bytes inside of [ 31.444288] freed 168-byte region [ffff88800fd7d570, ffff88800fd7d618) [ 31.445698] [ 31.445917] The buggy address belongs to the physical page: [ 31.446569] page:000000003362fd17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd7d [ 31.447654] memcg:ffff88800f085d01 [ 31.448081] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.448798] page_type: 0xffffffff() [ 31.449248] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a1a00 000000000000000b [ 31.450181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f085d01 [ 31.451093] page dumped because: kasan: bad access detected [ 31.451762] [ 31.451979] Memory state around the buggy address: [ 31.452577] ffff88800fd7d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.453457] ffff88800fd7d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.454312] >ffff88800fd7d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.455175] ^ [ 31.455844] ffff88800fd7d600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.456721] ffff88800fd7d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.457582] ================================================================== [ 31.458536] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.367265] BUG: Bad rss-counter state mm:00000000386888ae type:MM_FILEPAGES val:33 [ 34.368685] BUG: Bad rss-counter state mm:00000000386888ae type:MM_ANONPAGES val:22 [ 34.863048] BUG: Bad rss-counter state mm:000000006e34ffdb type:MM_FILEPAGES val:33 [ 34.864031] BUG: Bad rss-counter state mm:000000006e34ffdb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22902' (ECDSA) to the list of known hosts. 2023/06/20 23:09:06 fuzzer started 2023/06/20 23:09:06 dialing manager at localhost:36067 2023/06/20 23:09:06 checking machine... 2023/06/20 23:09:06 checking revisions... [ 35.630043] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:09:06 testing simple program... [ 35.675843] cgroup: Unknown subsys name 'net' [ 35.731276] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:09:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000361a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800e772000 RSP=ffff888015bd7be8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000e80 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff812d905b RFL=00000082 [--S----] 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 00007f3dc2ef9900 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=00007f3b6b923d90 CR3=0000000019a62000 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=73833a744ca4f582c34b1e761adda664 XMM02=000000000011b470eff9b2d0a8fce9cb XMM03=000000000011b5402c67c8bc2e329bc3 XMM04=b369b9aeb6c0b99900000000000ae988 XMM05=751b9502027dc0b90000000000131990 XMM06=daec166909c862950000000000130b68 XMM07=e042d86d42eb936e00000000001220f0 XMM08=2447437bd124d343000000000011b540 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f3dc34b0618 CR3=000000000c5b2000 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=2035303a39303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39303a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000