[ 23.847356] BUG: Bad rss-counter state mm:000000008dcadcb6 type:MM_FILEPAGES val:33 [ 23.848378] BUG: Bad rss-counter state mm:000000008dcadcb6 type:MM_ANONPAGES val:22 [ 23.957880] ================================================================== [ 23.958978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.960034] Read of size 8 at addr ffff88800e747df0 by task sshd/218 [ 23.960891] [ 23.961135] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.962097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.963175] Call Trace: [ 23.963531] [ 23.963852] dump_stack_lvl+0x91/0xf0 [ 23.964410] print_report+0xcc/0x620 [ 23.964938] ? __virt_addr_valid+0x102/0x340 [ 23.965556] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.966240] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.966852] kasan_report+0xbe/0xf0 [ 23.967324] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.967942] vma_interval_tree_remove+0xc75/0xec0 [ 23.968579] vma_prepare+0xc54/0x11a0 [ 23.969062] __split_vma+0x5af/0x950 [ 23.969574] ? __pfx___split_vma+0x10/0x10 [ 23.970162] ? find_held_lock+0x2c/0x110 [ 23.970743] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.971382] ? lock_is_held_type+0x9f/0x120 [ 23.972005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.972699] ? mtree_range_walk+0x632/0x900 [ 23.973327] ? mas_walk+0x5c7/0x7c0 [ 23.973867] do_vmi_munmap+0x1f1/0x2b0 [ 23.974422] mmap_region+0x1f9/0x2660 [ 23.974967] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.975545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.976361] ? __pfx_lock_acquire+0x10/0x10 [ 23.976970] ? __pfx_mmap_region+0x10/0x10 [ 23.977571] ? security_mmap_addr+0x7d/0xa0 [ 23.978178] ? get_unmapped_area+0x1f5/0x3f0 [ 23.978801] do_mmap+0x854/0xf00 [ 23.979294] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.979856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.980525] ksys_mmap_pgoff+0x3af/0x500 [ 23.981102] do_syscall_64+0x3f/0x90 [ 23.981647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.982377] RIP: 0033:0x7f85d5ae9d82 [ 23.982894] 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 [ 23.985214] RSP: 002b:00007fffb4214a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.986228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85d5ae9d82 [ 23.987193] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85d4f23000 [ 23.988155] RBP: 00007f85d4f23000 R08: 0000000000000009 R09: 0000000000001000 [ 23.989107] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f3a6daf70 [ 23.990063] R13: 00007fffb4214a50 R14: 00007fffb4214a80 R15: 00007fffb4214de0 [ 23.990948] [ 23.991247] [ 23.991491] Allocated by task 210: [ 23.991999] kasan_save_stack+0x22/0x50 [ 23.992584] kasan_set_track+0x25/0x30 [ 23.993141] __kasan_slab_alloc+0x59/0x70 [ 23.993743] kmem_cache_alloc+0x16b/0x370 [ 23.994329] vm_area_dup+0x20/0x160 [ 23.994793] __split_vma+0x170/0x950 [ 23.995261] split_vma+0xc6/0x110 [ 23.995709] mprotect_fixup+0x8d2/0xb30 [ 23.996228] do_mprotect_pkey+0x87e/0xd40 [ 23.996810] __x64_sys_mprotect+0x78/0xc0 [ 23.997395] do_syscall_64+0x3f/0x90 [ 23.997938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.998641] [ 23.998859] Freed by task 210: [ 23.999252] kasan_save_stack+0x22/0x50 [ 23.999758] kasan_set_track+0x25/0x30 [ 24.000257] kasan_save_free_info+0x2b/0x50 [ 24.000855] __kasan_slab_free+0x10a/0x190 [ 24.001468] kmem_cache_free+0x10d/0x4d0 [ 24.002042] rcu_core+0x8c8/0x2860 [ 24.002522] __do_softirq+0x1b7/0x7d4 [ 24.002998] [ 24.003215] Last potentially related work creation: [ 24.003802] kasan_save_stack+0x22/0x50 [ 24.004324] __kasan_record_aux_stack+0x8e/0xa0 [ 24.004974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.005698] remove_vma+0x139/0x170 [ 24.006209] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.006781] do_vmi_munmap+0x1f1/0x2b0 [ 24.007267] __vm_munmap+0x138/0x3a0 [ 24.007789] __x64_sys_munmap+0x59/0x80 [ 24.008355] do_syscall_64+0x3f/0x90 [ 24.008891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.009616] [ 24.009862] Second to last potentially related work creation: [ 24.010606] kasan_save_stack+0x22/0x50 [ 24.011117] __kasan_record_aux_stack+0x8e/0xa0 [ 24.011736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.012468] remove_vma+0x139/0x170 [ 24.012980] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.013603] do_vmi_munmap+0x1f1/0x2b0 [ 24.014144] mmap_region+0x1f9/0x2660 [ 24.014680] do_mmap+0x854/0xf00 [ 24.015170] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.015719] ksys_mmap_pgoff+0x3af/0x500 [ 24.016288] do_syscall_64+0x3f/0x90 [ 24.016817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.017531] [ 24.017772] The buggy address belongs to the object at ffff88800e747d98 [ 24.017772] which belongs to the cache vm_area_struct of size 168 [ 24.019421] The buggy address is located 88 bytes inside of [ 24.019421] freed 168-byte region [ffff88800e747d98, ffff88800e747e40) [ 24.021030] [ 24.021276] The buggy address belongs to the physical page: [ 24.022026] page:00000000da9b722c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe747 [ 24.023150] memcg:ffff88800dfebe01 [ 24.023604] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.024363] page_type: 0xffffffff() [ 24.024878] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.025924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfebe01 [ 24.026892] page dumped because: kasan: bad access detected [ 24.027586] [ 24.027830] Memory state around the buggy address: [ 24.028502] ffff88800e747c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.029472] ffff88800e747d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.030447] >ffff88800e747d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.031417] ^ [ 24.032358] ffff88800e747e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.033340] ffff88800e747e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.034313] ================================================================== [ 24.035492] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.195036] BUG: Bad rss-counter state mm:00000000fb5b9e94 type:MM_FILEPAGES val:33 [ 26.196136] BUG: Bad rss-counter state mm:00000000fb5b9e94 type:MM_ANONPAGES val:22 [ 26.709506] BUG: Bad rss-counter state mm:000000007ab3df23 type:MM_FILEPAGES val:33 [ 26.710637] BUG: Bad rss-counter state mm:000000007ab3df23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24999' (ECDSA) to the list of known hosts. 2023/06/21 00:00:09 fuzzer started 2023/06/21 00:00:09 dialing manager at localhost:36067 2023/06/21 00:00:09 checking machine... 2023/06/21 00:00:09 checking revisions... [ 27.441433] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:00:09 testing simple program... [ 27.489530] cgroup: Unknown subsys name 'net' [ 27.537795] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:00:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fcc99fb46c0 CR3=000000000d6b0000 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=2039303a30303a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a30303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff888016af73a0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000004 R13=0000000000000000 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff8180fea0 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 00007f4586ec1900 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=00007f4586e86008 CR3=000000001c820000 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