[ 61.158658] BUG: Bad rss-counter state mm:00000000e29ea674 type:MM_FILEPAGES val:33 [ 61.159892] BUG: Bad rss-counter state mm:00000000e29ea674 type:MM_ANONPAGES val:22 [ 61.283139] ================================================================== [ 61.283966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.284844] Read of size 8 at addr ffff8880196cadf0 by task sshd/225 [ 61.285545] [ 61.285743] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.286606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.287441] Call Trace: [ 61.287688] [ 61.287906] dump_stack_lvl+0x91/0xf0 [ 61.288285] print_report+0xcc/0x620 [ 61.288656] ? __virt_addr_valid+0x102/0x340 [ 61.289078] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.289551] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.290030] kasan_report+0xbe/0xf0 [ 61.290396] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.290891] vma_interval_tree_remove+0xc75/0xec0 [ 61.291379] vma_prepare+0xc54/0x11a0 [ 61.291807] __split_vma+0x5af/0x950 [ 61.292223] ? __pfx___split_vma+0x10/0x10 [ 61.292721] ? find_held_lock+0x2c/0x110 [ 61.293211] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.293742] ? lock_is_held_type+0x9f/0x120 [ 61.294252] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.294833] ? mtree_range_walk+0x632/0x900 [ 61.295347] ? mas_walk+0x5c7/0x7c0 [ 61.295789] do_vmi_munmap+0x1f1/0x2b0 [ 61.296251] mmap_region+0x1f9/0x2660 [ 61.296704] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.297186] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.297853] ? __pfx_lock_acquire+0x10/0x10 [ 61.298341] ? __pfx_mmap_region+0x10/0x10 [ 61.298853] ? security_mmap_addr+0x7d/0xa0 [ 61.299344] ? get_unmapped_area+0x1f5/0x3f0 [ 61.299821] do_mmap+0x854/0xf00 [ 61.300145] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.300503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.300899] ksys_mmap_pgoff+0x3af/0x500 [ 61.301258] do_syscall_64+0x3f/0x90 [ 61.301605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.302063] RIP: 0033:0x7f5e105b7d82 [ 61.302387] 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 [ 61.303901] RSP: 002b:00007ffc2d8ad2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.304543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e105b7d82 [ 61.305147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e0f9f1000 [ 61.305747] RBP: 00007f5e0f9f1000 R08: 0000000000000009 R09: 0000000000001000 [ 61.306345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c28e51ec0 [ 61.306953] R13: 00007ffc2d8ad2d0 R14: 00007ffc2d8ad300 R15: 00007ffc2d8ad660 [ 61.307562] [ 61.307772] [ 61.307934] Allocated by task 211: [ 61.308240] kasan_save_stack+0x22/0x50 [ 61.308596] kasan_set_track+0x25/0x30 [ 61.308947] __kasan_slab_alloc+0x59/0x70 [ 61.309320] kmem_cache_alloc+0x16b/0x370 [ 61.309686] vm_area_dup+0x20/0x160 [ 61.310010] __split_vma+0x170/0x950 [ 61.310343] split_vma+0xc6/0x110 [ 61.310655] mprotect_fixup+0x8d2/0xb30 [ 61.311018] do_mprotect_pkey+0x87e/0xd40 [ 61.311387] __x64_sys_mprotect+0x78/0xc0 [ 61.311756] do_syscall_64+0x3f/0x90 [ 61.312095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.312550] [ 61.312704] Freed by task 211: [ 61.312983] kasan_save_stack+0x22/0x50 [ 61.313341] kasan_set_track+0x25/0x30 [ 61.313691] kasan_save_free_info+0x2b/0x50 [ 61.314069] __kasan_slab_free+0x10a/0x190 [ 61.314450] kmem_cache_free+0x10d/0x4d0 [ 61.314823] rcu_core+0x8c8/0x2860 [ 61.315140] __do_softirq+0x1b7/0x7d4 [ 61.315481] [ 61.315635] Last potentially related work creation: [ 61.316052] kasan_save_stack+0x22/0x50 [ 61.316409] __kasan_record_aux_stack+0x8e/0xa0 [ 61.316817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.317272] remove_vma+0x139/0x170 [ 61.317593] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.317988] do_vmi_munmap+0x1f1/0x2b0 [ 61.318331] __vm_munmap+0x138/0x3a0 [ 61.318663] __x64_sys_munmap+0x59/0x80 [ 61.319033] do_syscall_64+0x3f/0x90 [ 61.319370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.319827] [ 61.319981] The buggy address belongs to the object at ffff8880196cad98 [ 61.319981] which belongs to the cache vm_area_struct of size 168 [ 61.321017] The buggy address is located 88 bytes inside of [ 61.321017] freed 168-byte region [ffff8880196cad98, ffff8880196cae40) [ 61.322008] [ 61.322163] The buggy address belongs to the physical page: [ 61.322634] page:00000000e0b30b51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196ca [ 61.323411] memcg:ffff88800fce9f01 [ 61.323715] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.324176] page_type: 0xffffffff() [ 61.324497] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.325148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fce9f01 [ 61.325788] page dumped because: kasan: bad access detected [ 61.326257] [ 61.326411] Memory state around the buggy address: [ 61.326838] ffff8880196cac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 61.327446] ffff8880196cad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 61.328060] >ffff8880196cad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.328661] ^ [ 61.329229] ffff8880196cae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.329837] ffff8880196cae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.330442] ================================================================== [ 61.331240] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 63.307617] BUG: Bad rss-counter state mm:00000000b1c829c1 type:MM_FILEPAGES val:33 [ 63.308756] BUG: Bad rss-counter state mm:00000000b1c829c1 type:MM_ANONPAGES val:22 [ 63.845313] BUG: Bad rss-counter state mm:00000000fecd3963 type:MM_FILEPAGES val:33 [ 63.846865] BUG: Bad rss-counter state mm:00000000fecd3963 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42934' (ECDSA) to the list of known hosts. 2023/06/20 17:24:48 fuzzer started 2023/06/20 17:24:48 dialing manager at localhost:36067 2023/06/20 17:24:48 checking machine... 2023/06/20 17:24:48 checking revisions... [ 64.548825] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:24:48 testing simple program... [ 64.588337] cgroup: Unknown subsys name 'net' [ 64.642465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:24:48 Registers: info registers vcpu 0 RAX=1ffffffff0bb7aff RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806ce099e0 R8 =ffffffff860d8256 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 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=00007ffe7cd05d88 CR3=0000000019d02000 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=2037343a34323a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3433 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3433325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a34323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880102151c0 RSI=ffffffff81f30db1 RDI=0000000000000004 RBP=ffff88800f187c38 RSP=ffff88800f1879b8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=0000000000000007 R15=0000000000001032 RIP=ffffffff814c0880 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 00007f32a573d900 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=00007f32a5cf4618 CR3=00000000099ce000 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