[ 23.942310] BUG: Bad rss-counter state mm:00000000abd8abc7 type:MM_FILEPAGES val:33 [ 23.943567] BUG: Bad rss-counter state mm:00000000abd8abc7 type:MM_ANONPAGES val:22 [ 23.985564] ================================================================== [ 23.986673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.987854] Read of size 8 at addr ffff88800e3ce968 by task sshd/219 [ 23.988797] [ 23.989025] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.990052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.991217] Call Trace: [ 23.991640] [ 23.992075] dump_stack_lvl+0x91/0xf0 [ 23.992684] print_report+0xcc/0x620 [ 23.993330] ? __virt_addr_valid+0x102/0x340 [ 23.994039] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.994845] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.995568] kasan_report+0xbe/0xf0 [ 23.996084] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.996765] vma_interval_tree_remove+0xc75/0xec0 [ 23.997404] vma_prepare+0xc54/0x11a0 [ 23.997951] __split_vma+0x5af/0x950 [ 23.998454] ? __pfx___split_vma+0x10/0x10 [ 23.999023] ? find_held_lock+0x2c/0x110 [ 23.999574] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.000190] ? lock_is_held_type+0x9f/0x120 [ 24.000792] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.001438] ? mtree_range_walk+0x632/0x900 [ 24.002042] ? mas_walk+0x5c7/0x7c0 [ 24.002543] do_vmi_munmap+0x1f1/0x2b0 [ 24.003075] mmap_region+0x1f9/0x2660 [ 24.003581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.004137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.004906] ? __pfx_lock_acquire+0x10/0x10 [ 24.005476] ? __pfx_mmap_region+0x10/0x10 [ 24.006055] ? security_mmap_addr+0x7d/0xa0 [ 24.006615] ? get_unmapped_area+0x1f5/0x3f0 [ 24.007203] do_mmap+0x854/0xf00 [ 24.007672] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.008210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.008835] ksys_mmap_pgoff+0x3af/0x500 [ 24.009368] do_syscall_64+0x3f/0x90 [ 24.009909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.010585] RIP: 0033:0x7fe0864ffd82 [ 24.011082] 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 [ 24.013619] RSP: 002b:00007fff448e21d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.014599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0864ffd82 [ 24.015499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe085939000 [ 24.016416] RBP: 00007fe085939000 R08: 0000000000000009 R09: 0000000000001000 [ 24.017333] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8f4713ec0 [ 24.018269] R13: 00007fff448e21f0 R14: 00007fff448e2220 R15: 00007fff448e2580 [ 24.019190] [ 24.019500] [ 24.019750] Allocated by task 212: [ 24.020209] kasan_save_stack+0x22/0x50 [ 24.020753] kasan_set_track+0x25/0x30 [ 24.021271] __kasan_slab_alloc+0x59/0x70 [ 24.021852] kmem_cache_alloc+0x16b/0x370 [ 24.022393] vm_area_dup+0x20/0x160 [ 24.022880] __split_vma+0x170/0x950 [ 24.023366] split_vma+0xc6/0x110 [ 24.023855] mprotect_fixup+0x8d2/0xb30 [ 24.024382] do_mprotect_pkey+0x87e/0xd40 [ 24.024950] __x64_sys_mprotect+0x78/0xc0 [ 24.025512] do_syscall_64+0x3f/0x90 [ 24.026019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.026710] [ 24.026937] Freed by task 19: [ 24.027341] kasan_save_stack+0x22/0x50 [ 24.027897] kasan_set_track+0x25/0x30 [ 24.028419] kasan_save_free_info+0x2b/0x50 [ 24.029005] __kasan_slab_free+0x10a/0x190 [ 24.029600] kmem_cache_free+0x10d/0x4d0 [ 24.030148] rcu_core+0x8c8/0x2860 [ 24.030614] __do_softirq+0x1b7/0x7d4 [ 24.031122] [ 24.031344] Last potentially related work creation: [ 24.032007] kasan_save_stack+0x22/0x50 [ 24.032545] __kasan_record_aux_stack+0x8e/0xa0 [ 24.033178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.033897] remove_vma+0x139/0x170 [ 24.034377] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.034969] do_vmi_munmap+0x1f1/0x2b0 [ 24.035475] __vm_munmap+0x138/0x3a0 [ 24.035985] __x64_sys_munmap+0x59/0x80 [ 24.036513] do_syscall_64+0x3f/0x90 [ 24.037050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.037772] [ 24.038002] Second to last potentially related work creation: [ 24.038730] kasan_save_stack+0x22/0x50 [ 24.039257] __kasan_record_aux_stack+0x8e/0xa0 [ 24.039876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.040549] remove_vma+0x139/0x170 [ 24.041058] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.041659] do_vmi_munmap+0x1f1/0x2b0 [ 24.042162] mmap_region+0x1f9/0x2660 [ 24.042638] do_mmap+0x854/0xf00 [ 24.043094] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.043588] ksys_mmap_pgoff+0x3af/0x500 [ 24.044109] do_syscall_64+0x3f/0x90 [ 24.044602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.045283] [ 24.045510] The buggy address belongs to the object at ffff88800e3ce910 [ 24.045510] which belongs to the cache vm_area_struct of size 168 [ 24.047031] The buggy address is located 88 bytes inside of [ 24.047031] freed 168-byte region [ffff88800e3ce910, ffff88800e3ce9b8) [ 24.048451] [ 24.048674] The buggy address belongs to the physical page: [ 24.049349] page:0000000084b6d7a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ce [ 24.050486] memcg:ffff88800d619901 [ 24.050937] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.051668] page_type: 0xffffffff() [ 24.052127] raw: 0100000000000200 ffff8880087a0c80 ffffea00003870c0 dead000000000005 [ 24.053072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d619901 [ 24.054003] page dumped because: kasan: bad access detected [ 24.054670] [ 24.054896] Memory state around the buggy address: [ 24.055565] ffff88800e3ce800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.056433] ffff88800e3ce880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.057295] >ffff88800e3ce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.058199] ^ [ 24.059006] ffff88800e3ce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.059870] ffff88800e3cea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.060738] ================================================================== [ 24.061710] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.835585] BUG: Bad rss-counter state mm:00000000f980841a type:MM_FILEPAGES val:33 [ 25.836300] BUG: Bad rss-counter state mm:00000000f980841a type:MM_ANONPAGES val:22 [ 26.272006] BUG: Bad rss-counter state mm:000000002468fd31 type:MM_FILEPAGES val:33 [ 26.272692] BUG: Bad rss-counter state mm:000000002468fd31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26747' (ECDSA) to the list of known hosts. 2023/06/20 14:23:09 fuzzer started 2023/06/20 14:23:10 dialing manager at localhost:36067 2023/06/20 14:23:10 checking machine... 2023/06/20 14:23:10 checking revisions... [ 27.017335] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:23:10 testing simple program... [ 27.062528] cgroup: Unknown subsys name 'net' [ 27.094016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:23:09 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007f16c7a96e07 RCX=ffffffff813a0add RDX=ffffffffffffffff RSI=00007f16c7a96e07 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff888019727660 R8 =0000000000000006 R9 =00007f16c7a96e07 R10=ffffffffffffffff R11=00000000000b6a61 R12=ffff8880197277a0 R13=0000000000000000 R14=ffff888015cc3680 R15=0000000000000000 RIP=ffffffff814c0250 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 00007f16c6f04900 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=00007f16c6ec9008 CR3=000000000dbae000 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=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 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=0000000000000001 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=00007f78164bf3f0 CR3=000000000e39a000 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=3cfe6515a89c7c827142a965a10f1e82 XMM02=000000000011d378ec2efd57dc4c00df XMM03=0000000000121020028e3a830c93626d XMM04=d4dccb8714ac39f300000000000ae988 XMM05=dfcdbad4f1609c370000000000131f30 XMM06=b9b5b2575009613500000000001309a0 XMM07=e042d86d42eb936e00000000001212a0 XMM08=028e3a830c93626d000000000011d3d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000