[ 31.290956] BUG: Bad rss-counter state mm:0000000004e2725c type:MM_FILEPAGES val:33 [ 31.292287] BUG: Bad rss-counter state mm:0000000004e2725c type:MM_ANONPAGES val:22 [ 31.453052] ================================================================== [ 31.453950] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.454839] Read of size 8 at addr ffff888019ff5880 by task sshd/220 [ 31.455641] [ 31.455870] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.456679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.457630] Call Trace: [ 31.457960] [ 31.458231] dump_stack_lvl+0x91/0xf0 [ 31.458704] print_report+0xcc/0x620 [ 31.459161] ? __virt_addr_valid+0x102/0x340 [ 31.459681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.460270] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.460876] kasan_report+0xbe/0xf0 [ 31.461328] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.461919] vma_interval_tree_remove+0xc75/0xec0 [ 31.462501] vma_prepare+0xc54/0x11a0 [ 31.462956] __split_vma+0x5af/0x950 [ 31.463412] ? __pfx___split_vma+0x10/0x10 [ 31.463918] ? find_held_lock+0x2c/0x110 [ 31.464420] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.464958] ? lock_is_held_type+0x9f/0x120 [ 31.465476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.466044] ? mtree_range_walk+0x632/0x900 [ 31.466578] ? mas_walk+0x5c7/0x7c0 [ 31.467032] do_vmi_munmap+0x1f1/0x2b0 [ 31.467505] mmap_region+0x1f9/0x2660 [ 31.467963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.468460] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.469148] ? __pfx_lock_acquire+0x10/0x10 [ 31.469664] ? __pfx_mmap_region+0x10/0x10 [ 31.470181] ? security_mmap_addr+0x7d/0xa0 [ 31.470696] ? get_unmapped_area+0x1f5/0x3f0 [ 31.471222] do_mmap+0x854/0xf00 [ 31.471644] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.472119] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.472654] ksys_mmap_pgoff+0x3af/0x500 [ 31.473153] do_syscall_64+0x3f/0x90 [ 31.473614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.474230] RIP: 0033:0x7fde658c8d82 [ 31.474663] 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 [ 31.476697] RSP: 002b:00007ffeeeb52d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.477565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde658c8d82 [ 31.478376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde64d02000 [ 31.479196] RBP: 00007fde64d02000 R08: 0000000000000009 R09: 0000000000001000 [ 31.480013] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636ecb5cd90 [ 31.480861] R13: 00007ffeeeb52d90 R14: 00007ffeeeb52dc0 R15: 00007ffeeeb53120 [ 31.481698] [ 31.481983] [ 31.482196] Allocated by task 212: [ 31.482613] kasan_save_stack+0x22/0x50 [ 31.483094] kasan_set_track+0x25/0x30 [ 31.483567] __kasan_slab_alloc+0x59/0x70 [ 31.484063] kmem_cache_alloc+0x16b/0x370 [ 31.484552] vm_area_dup+0x20/0x160 [ 31.485001] __split_vma+0x170/0x950 [ 31.485440] split_vma+0xc6/0x110 [ 31.485853] mprotect_fixup+0x8d2/0xb30 [ 31.486336] do_mprotect_pkey+0x87e/0xd40 [ 31.486833] __x64_sys_mprotect+0x78/0xc0 [ 31.487323] do_syscall_64+0x3f/0x90 [ 31.487767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.488383] [ 31.488587] Freed by task 19: [ 31.488959] kasan_save_stack+0x22/0x50 [ 31.489437] kasan_set_track+0x25/0x30 [ 31.489904] kasan_save_free_info+0x2b/0x50 [ 31.490410] __kasan_slab_free+0x10a/0x190 [ 31.490916] kmem_cache_free+0x10d/0x4d0 [ 31.491397] rcu_core+0x8c8/0x2860 [ 31.491823] __do_softirq+0x1b7/0x7d4 [ 31.492272] [ 31.492484] Last potentially related work creation: [ 31.493041] kasan_save_stack+0x22/0x50 [ 31.493524] __kasan_record_aux_stack+0x8e/0xa0 [ 31.494070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.494685] remove_vma+0x139/0x170 [ 31.495115] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.495651] do_vmi_munmap+0x1f1/0x2b0 [ 31.496115] __vm_munmap+0x138/0x3a0 [ 31.496557] __x64_sys_munmap+0x59/0x80 [ 31.497043] do_syscall_64+0x3f/0x90 [ 31.497497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.498116] [ 31.498320] The buggy address belongs to the object at ffff888019ff5828 [ 31.498320] which belongs to the cache vm_area_struct of size 168 [ 31.499702] The buggy address is located 88 bytes inside of [ 31.499702] freed 168-byte region [ffff888019ff5828, ffff888019ff58d0) [ 31.501052] [ 31.501258] The buggy address belongs to the physical page: [ 31.501882] page:0000000011087521 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ff5 [ 31.502923] memcg:ffff888019fc5d01 [ 31.503326] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.503943] page_type: 0xffffffff() [ 31.504374] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.505258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fc5d01 [ 31.506125] page dumped because: kasan: bad access detected [ 31.506760] [ 31.506970] Memory state around the buggy address: [ 31.507518] ffff888019ff5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.508329] ffff888019ff5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.509161] >ffff888019ff5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.509961] ^ [ 31.510347] ffff888019ff5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.511172] ffff888019ff5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.511999] ================================================================== [ 31.513272] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.494337] BUG: Bad rss-counter state mm:00000000ad9f8df5 type:MM_FILEPAGES val:33 [ 33.495357] BUG: Bad rss-counter state mm:00000000ad9f8df5 type:MM_ANONPAGES val:22 [ 33.953374] BUG: Bad rss-counter state mm:0000000061a0cd38 type:MM_FILEPAGES val:33 [ 33.954643] BUG: Bad rss-counter state mm:0000000061a0cd38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26853' (ECDSA) to the list of known hosts. 2023/06/20 16:25:43 fuzzer started 2023/06/20 16:25:44 dialing manager at localhost:36067 2023/06/20 16:25:44 checking machine... 2023/06/20 16:25:44 checking revisions... [ 34.659559] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:25:44 testing simple program... [ 34.713743] cgroup: Unknown subsys name 'net' [ 34.756390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:25:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015818000 RSI=ffffffff81b2b1ef RDI=0000000000000005 RBP=ffff888015f2aa50 RSP=ffff888015817728 R8 =0000000000000005 R9 =000000000000000f R10=0000000000000001 R11=00000000000b6d53 R12=ffff88800d4e6100 R13=ffff88800d4e612c R14=dffffc0000000000 R15=ffff888015f2a7a4 RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7a4e689900 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=00007f7a4da7f870 CR3=000000000c918000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=32fd7166bb355f4400000000000ae988 XMM05=b7436676374972ee0000000000132730 XMM06=4fda316b135da52b0000000000131460 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c7664b RBX=0000000000000001 RCX=ffffffff863b325a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88800fd07930 RBP=ffff88800fd07920 RSP=ffff88800fd07858 R8 =ffffffff863b325e R9 =ffff88800fd07908 R10=0000000000038001 R11=000000000008a8d8 R12=ffff88800fd07928 R13=ffff88800fd07910 R14=ffff88800fd07e80 R15=ffff88800fd078c8 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007f0940103900 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=00007f09406ba618 CR3=000000000c5ea000 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=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