[ 166.647018] BUG: Bad rss-counter state mm:0000000098ef5240 type:MM_FILEPAGES val:33 [ 166.648351] BUG: Bad rss-counter state mm:0000000098ef5240 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 166.801488] ================================================================== [ 166.802669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 166.803969] Read of size 8 at addr ffff888015d5f6b0 by task sshd/225 [ 166.805024] [ 166.805305] CPU: 1 PID: 225 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 166.806619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 166.807781] Call Trace: [ 166.808172] [ 166.808525] dump_stack_lvl+0x91/0xf0 [ 166.809218] print_report+0xcc/0x620 [ 166.809882] ? __virt_addr_valid+0x102/0x340 [ 166.810640] ? vma_interval_tree_remove+0xc75/0xec0 [ 166.811491] ? vma_interval_tree_remove+0xc75/0xec0 [ 166.812297] kasan_report+0xbe/0xf0 [ 166.813013] ? vma_interval_tree_remove+0xc75/0xec0 [ 166.813873] vma_interval_tree_remove+0xc75/0xec0 [ 166.814478] vma_prepare+0xc54/0x11a0 [ 166.814956] __split_vma+0x5af/0x950 [ 166.815448] ? __pfx___split_vma+0x10/0x10 [ 166.815981] ? find_held_lock+0x2c/0x110 [ 166.816507] do_vmi_align_munmap+0x2ba/0x11f0 [ 166.817076] ? lock_is_held_type+0x9f/0x120 [ 166.817622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 166.818231] ? mtree_range_walk+0x632/0x900 [ 166.818790] ? mas_walk+0x5c7/0x7c0 [ 166.819283] do_vmi_munmap+0x1f1/0x2b0 [ 166.819777] mmap_region+0x1f9/0x2660 [ 166.820273] ? vm_mmap_pgoff+0x15c/0x3a0 [ 166.820793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 166.821510] ? __pfx_lock_acquire+0x10/0x10 [ 166.822047] ? __pfx_mmap_region+0x10/0x10 [ 166.822575] ? security_mmap_addr+0x7d/0xa0 [ 166.823276] ? get_unmapped_area+0x1f5/0x3f0 [ 166.823827] do_mmap+0x854/0xf00 [ 166.824340] vm_mmap_pgoff+0x1a6/0x3a0 [ 166.824940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 166.825511] ksys_mmap_pgoff+0x3af/0x500 [ 166.826117] do_syscall_64+0x3f/0x90 [ 166.826663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 166.827346] RIP: 0033:0x7fac6cf7ad82 [ 166.827828] 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 [ 166.830432] RSP: 002b:00007ffd36cf5e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 166.831516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac6cf7ad82 [ 166.832468] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac6c3b4000 [ 166.833530] RBP: 00007fac6c3b4000 R08: 0000000000000009 R09: 0000000000001000 [ 166.834500] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd8a611ec0 [ 166.835544] R13: 00007ffd36cf5e30 R14: 00007ffd36cf5e60 R15: 00007ffd36cf61c0 [ 166.836605] [ 166.836959] [ 166.837191] Allocated by task 218: [ 166.837701] kasan_save_stack+0x22/0x50 [ 166.838331] kasan_set_track+0x25/0x30 [ 166.838864] __kasan_slab_alloc+0x59/0x70 [ 166.839542] kmem_cache_alloc+0x16b/0x370 [ 166.840163] vm_area_dup+0x20/0x160 [ 166.840650] __split_vma+0x170/0x950 [ 166.841144] split_vma+0xc6/0x110 [ 166.841604] mprotect_fixup+0x8d2/0xb30 [ 166.842148] do_mprotect_pkey+0x87e/0xd40 [ 166.842707] __x64_sys_mprotect+0x78/0xc0 [ 166.843300] do_syscall_64+0x3f/0x90 [ 166.843941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 166.844631] [ 166.844904] Freed by task 218: [ 166.845563] kasan_save_stack+0x22/0x50 [ 166.846087] kasan_set_track+0x25/0x30 [ 166.846607] kasan_save_free_info+0x2b/0x50 [ 166.847345] __kasan_slab_free+0x10a/0x190 [ 166.847962] kmem_cache_free+0x10d/0x4d0 [ 166.848509] rcu_core+0x8c8/0x2860 [ 166.849054] __do_softirq+0x1b7/0x7d4 [ 166.849655] [ 166.849892] Last potentially related work creation: [ 166.850517] kasan_save_stack+0x22/0x50 [ 166.851107] __kasan_record_aux_stack+0x8e/0xa0 [ 166.851696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 166.852343] remove_vma+0x139/0x170 [ 166.852795] do_vmi_align_munmap+0xd4a/0x11f0 [ 166.853356] do_vmi_munmap+0x1f1/0x2b0 [ 166.853847] __vm_munmap+0x138/0x3a0 [ 166.854318] __x64_sys_munmap+0x59/0x80 [ 166.854827] do_syscall_64+0x3f/0x90 [ 166.855314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 166.855962] [ 166.856179] Second to last potentially related work creation: [ 166.856870] kasan_save_stack+0x22/0x50 [ 166.857376] __kasan_record_aux_stack+0x8e/0xa0 [ 166.857958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 166.858604] remove_vma+0x139/0x170 [ 166.859080] do_vmi_align_munmap+0xd4a/0x11f0 [ 166.859646] do_vmi_munmap+0x1f1/0x2b0 [ 166.860134] mmap_region+0x1f9/0x2660 [ 166.860615] do_mmap+0x854/0xf00 [ 166.861044] vm_mmap_pgoff+0x1a6/0x3a0 [ 166.861540] ksys_mmap_pgoff+0x3af/0x500 [ 166.862045] do_syscall_64+0x3f/0x90 [ 166.862522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 166.863195] [ 166.863410] The buggy address belongs to the object at ffff888015d5f658 [ 166.863410] which belongs to the cache vm_area_struct of size 168 [ 166.864919] The buggy address is located 88 bytes inside of [ 166.864919] freed 168-byte region [ffff888015d5f658, ffff888015d5f700) [ 166.866330] [ 166.866550] The buggy address belongs to the physical page: [ 166.867236] page:0000000034b33592 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d5f [ 166.868342] memcg:ffff88800f3a3c01 [ 166.868782] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 166.869488] page_type: 0xffffffff() [ 166.869954] raw: 0100000000000200 ffff88800879fc80 ffffea0000573a00 dead000000000005 [ 166.870901] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3a3c01 [ 166.871825] page dumped because: kasan: bad access detected [ 166.872494] [ 166.872708] Memory state around the buggy address: [ 166.873311] ffff888015d5f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 166.874189] ffff888015d5f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 166.875068] >ffff888015d5f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 166.875918] ^ [ 166.876507] ffff888015d5f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 166.877368] ffff888015d5f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 166.878231] ================================================================== [ 166.879252] Disabling lock debugging due to kernel taint [ 169.334973] BUG: Bad rss-counter state mm:0000000083512223 type:MM_FILEPAGES val:33 [ 169.335984] BUG: Bad rss-counter state mm:0000000083512223 type:MM_ANONPAGES val:22 [ 169.831940] BUG: Bad rss-counter state mm:000000004d7428bc type:MM_FILEPAGES val:33 [ 169.832932] BUG: Bad rss-counter state mm:000000004d7428bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53193' (ECDSA) to the list of known hosts. 2023/06/19 13:27:28 fuzzer started 2023/06/19 13:27:28 dialing manager at localhost:44161 2023/06/19 13:27:28 checking machine... 2023/06/19 13:27:28 checking revisions... [ 170.557794] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:27:28 testing simple program... [ 170.598365] cgroup: Unknown subsys name 'net' [ 170.639821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:25:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009368000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000014 RDI=ffff8880093683f4 RBP=ffff888009368000 RSP=ffff888009377170 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000009293 R12=00000000ffffffff R13=ffff88807ffdc000 R14=ffffea0000700900 R15=ffff888009f2a000 RIP=ffffffff8135bd9a RFL=00000017 [----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=0000557b0c593000 CR3=000000000f258000 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=315f747865746e6f635f6c6c6174736e XMM02=5f6461657200646c6f632e315f747865 XMM03=65756c61765f6465646f636e655f6461 XMM04=6172676f72705f6166635f6574756365 XMM05=74756365786500646c6f632e315f7478 XMM06=315f747865746e6f635f657461647075 XMM07=735f6574756365786500706f5f6b6361 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83640961 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002d25edb RSI=ffff88801692fed8 RDI=ffffffff83640961 RBP=ffff88801692f6d8 RSP=ffff88801692f670 R8 =0000000000000001 R9 =ffff88801692f6c0 R10=0000000000038001 R11=000000000008aa86 R12=ffff88801692f748 R13=0000000000000000 R14=ffff8880164b1b40 R15=0000000000000001 RIP=ffffffff811303b9 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 00007f49eadec900 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=00007fff7e176000 CR3=000000000f258000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000