[ 33.350512] BUG: Bad rss-counter state mm:00000000d57fa201 type:MM_FILEPAGES val:33 [ 33.352310] BUG: Bad rss-counter state mm:00000000d57fa201 type:MM_ANONPAGES val:22 [ 33.511261] ================================================================== [ 33.511902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.516876] Read of size 8 at addr ffff88800cb0e228 by task sshd/221 [ 33.517363] [ 33.517500] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.518072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.518697] Call Trace: [ 33.518931] [ 33.519115] dump_stack_lvl+0x91/0xf0 [ 33.519433] print_report+0xcc/0x620 [ 33.519754] ? __virt_addr_valid+0x102/0x340 [ 33.520113] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.520527] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.520911] kasan_report+0xbe/0xf0 [ 33.521212] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.521581] vma_interval_tree_remove+0xc75/0xec0 [ 33.521971] vma_prepare+0xc54/0x11a0 [ 33.522282] __split_vma+0x5af/0x950 [ 33.522585] ? __pfx___split_vma+0x10/0x10 [ 33.522913] ? find_held_lock+0x2c/0x110 [ 33.523247] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.523614] ? lock_is_held_type+0x9f/0x120 [ 33.523971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.524354] ? mtree_range_walk+0x632/0x900 [ 33.524739] ? mas_walk+0x5c7/0x7c0 [ 33.525048] do_vmi_munmap+0x1f1/0x2b0 [ 33.525364] mmap_region+0x1f9/0x2660 [ 33.525677] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.526004] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.526451] ? __pfx_lock_acquire+0x10/0x10 [ 33.526797] ? __pfx_mmap_region+0x10/0x10 [ 33.527135] ? security_mmap_addr+0x7d/0xa0 [ 33.527472] ? get_unmapped_area+0x1f5/0x3f0 [ 33.527820] do_mmap+0x854/0xf00 [ 33.528099] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.528413] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.528806] ksys_mmap_pgoff+0x3af/0x500 [ 33.529139] do_syscall_64+0x3f/0x90 [ 33.529450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.529869] RIP: 0033:0x7f79e8d26d82 [ 33.530159] 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 [ 33.531504] RSP: 002b:00007fff91df4a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.532081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79e8d26d82 [ 33.532645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79e8160000 [ 33.533182] RBP: 00007f79e8160000 R08: 0000000000000009 R09: 0000000000001000 [ 33.533723] R10: 0000000000000812 R11: 0000000000000206 R12: 000055874012dec0 [ 33.534272] R13: 00007fff91df4a80 R14: 00007fff91df4ab0 R15: 00007fff91df4e10 [ 33.534815] [ 33.535002] [ 33.535139] Allocated by task 213: [ 33.535408] kasan_save_stack+0x22/0x50 [ 33.535732] kasan_set_track+0x25/0x30 [ 33.536065] __kasan_slab_alloc+0x59/0x70 [ 33.536407] kmem_cache_alloc+0x16b/0x370 [ 33.536798] vm_area_dup+0x20/0x160 [ 33.537097] __split_vma+0x170/0x950 [ 33.537401] split_vma+0xc6/0x110 [ 33.537689] mprotect_fixup+0x8d2/0xb30 [ 33.538016] do_mprotect_pkey+0x87e/0xd40 [ 33.538355] __x64_sys_mprotect+0x78/0xc0 [ 33.538690] do_syscall_64+0x3f/0x90 [ 33.539004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.539417] [ 33.539559] Freed by task 213: [ 33.539815] kasan_save_stack+0x22/0x50 [ 33.540136] kasan_set_track+0x25/0x30 [ 33.540450] kasan_save_free_info+0x2b/0x50 [ 33.540818] __kasan_slab_free+0x10a/0x190 [ 33.541166] kmem_cache_free+0x10d/0x4d0 [ 33.541499] rcu_core+0x8c8/0x2860 [ 33.541789] __do_softirq+0x1b7/0x7d4 [ 33.542106] [ 33.542248] Last potentially related work creation: [ 33.542622] kasan_save_stack+0x22/0x50 [ 33.542960] __kasan_record_aux_stack+0x8e/0xa0 [ 33.543332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.543771] remove_vma+0x139/0x170 [ 33.544099] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.544500] do_vmi_munmap+0x1f1/0x2b0 [ 33.544831] __vm_munmap+0x138/0x3a0 [ 33.545161] __x64_sys_munmap+0x59/0x80 [ 33.545489] do_syscall_64+0x3f/0x90 [ 33.545803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.546219] [ 33.546360] The buggy address belongs to the object at ffff88800cb0e1d0 [ 33.546360] which belongs to the cache vm_area_struct of size 168 [ 33.547280] The buggy address is located 88 bytes inside of [ 33.547280] freed 168-byte region [ffff88800cb0e1d0, ffff88800cb0e278) [ 33.548162] [ 33.548302] The buggy address belongs to the physical page: [ 33.552758] page:0000000029127bf0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb0e [ 33.553442] memcg:ffff88800c703801 [ 33.553715] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.554122] page_type: 0xffffffff() [ 33.554405] raw: 0100000000000200 ffff88800879fc80 ffffea0000389180 dead000000000008 [ 33.554986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c703801 [ 33.555550] page dumped because: kasan: bad access detected [ 33.555965] [ 33.556105] Memory state around the buggy address: [ 33.556482] ffff88800cb0e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.557127] ffff88800cb0e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.557765] >ffff88800cb0e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.558394] ^ [ 33.558817] ffff88800cb0e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.559455] ffff88800cb0e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.560082] ================================================================== [ 33.561101] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.347812] BUG: Bad rss-counter state mm:00000000820f1591 type:MM_FILEPAGES val:33 [ 36.348486] BUG: Bad rss-counter state mm:00000000820f1591 type:MM_ANONPAGES val:22 [ 37.813471] BUG: Bad rss-counter state mm:00000000018d2fe2 type:MM_FILEPAGES val:33 [ 37.815554] BUG: Bad rss-counter state mm:00000000018d2fe2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11347' (ECDSA) to the list of known hosts. 2023/06/20 09:54:25 fuzzer started 2023/06/20 09:54:25 dialing manager at localhost:44161 2023/06/20 09:54:25 checking machine... 2023/06/20 09:54:25 checking revisions... [ 38.643451] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:54:25 testing simple program... [ 38.698511] cgroup: Unknown subsys name 'net' [ 38.843420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:54:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180a7a4 RCX=0000000000000001 RDX=1ffff11002dcdec6 RSI=ffff888016e6f828 RDI=ffffffff8180a7a4 RBP=ffffffff8180a7a4 RSP=ffff888016e6f588 R8 =0000000000000001 R9 =ffff888016e6f618 R10=0000000000038001 R11=0000000000021ee6 R12=0000000000000001 R13=0000000000000000 R14=ffff8880182d3680 R15=ffff88800e8a74c0 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f3824e9d900 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=00007fc304f02008 CR3=000000000dc8e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001d1ff42 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88800e8ff9f8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 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=00007fc305324328 CR3=0000000019ad0000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000