syzkaller login: [ 49.281879] BUG: Bad rss-counter state mm:000000002c987ff2 type:MM_FILEPAGES val:33 [ 49.283241] BUG: Bad rss-counter state mm:000000002c987ff2 type:MM_ANONPAGES val:22 [ 49.428124] ================================================================== [ 49.429040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.429973] Read of size 8 at addr ffff88800e5135c8 by task sshd/219 [ 49.430723] [ 49.430951] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.431975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.432945] Call Trace: [ 49.433263] [ 49.433543] dump_stack_lvl+0x91/0xf0 [ 49.434038] print_report+0xcc/0x620 [ 49.434518] ? __virt_addr_valid+0x102/0x340 [ 49.435097] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.435723] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.436333] kasan_report+0xbe/0xf0 [ 49.436809] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.437419] vma_interval_tree_remove+0xc75/0xec0 [ 49.438020] vma_prepare+0xc54/0x11a0 [ 49.438490] __split_vma+0x5af/0x950 [ 49.438968] ? __pfx___split_vma+0x10/0x10 [ 49.439496] ? find_held_lock+0x2c/0x110 [ 49.440009] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.440567] ? lock_is_held_type+0x9f/0x120 [ 49.441099] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.441693] ? mtree_range_walk+0x632/0x900 [ 49.442238] ? mas_walk+0x5c7/0x7c0 [ 49.442707] do_vmi_munmap+0x1f1/0x2b0 [ 49.443222] mmap_region+0x1f9/0x2660 [ 49.443697] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.444214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.444922] ? __pfx_lock_acquire+0x10/0x10 [ 49.445458] ? __pfx_mmap_region+0x10/0x10 [ 49.445996] ? security_mmap_addr+0x7d/0xa0 [ 49.446528] ? get_unmapped_area+0x1f5/0x3f0 [ 49.447102] do_mmap+0x854/0xf00 [ 49.447548] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.448050] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.448618] ksys_mmap_pgoff+0x3af/0x500 [ 49.449124] do_syscall_64+0x3f/0x90 [ 49.449601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.450252] RIP: 0033:0x7ff7ccb8fd82 [ 49.450715] 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 [ 49.452829] RSP: 002b:00007ffeaf83fb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.453742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7ccb8fd82 [ 49.454595] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7cbfc9000 [ 49.455432] RBP: 00007ff7cbfc9000 R08: 0000000000000009 R09: 0000000000001000 [ 49.456269] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564662d88ec0 [ 49.457104] R13: 00007ffeaf83fb80 R14: 00007ffeaf83fbb0 R15: 00007ffeaf83ff10 [ 49.457962] [ 49.458251] [ 49.458463] Allocated by task 212: [ 49.458889] kasan_save_stack+0x22/0x50 [ 49.459408] kasan_set_track+0x25/0x30 [ 49.459896] __kasan_slab_alloc+0x59/0x70 [ 49.460416] kmem_cache_alloc+0x16b/0x370 [ 49.460928] vm_area_dup+0x20/0x160 [ 49.461375] __split_vma+0x170/0x950 [ 49.461838] split_vma+0xc6/0x110 [ 49.462274] mprotect_fixup+0x8d2/0xb30 [ 49.462772] do_mprotect_pkey+0x87e/0xd40 [ 49.463328] __x64_sys_mprotect+0x78/0xc0 [ 49.463846] do_syscall_64+0x3f/0x90 [ 49.464321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.464962] [ 49.465174] Freed by task 203: [ 49.465568] kasan_save_stack+0x22/0x50 [ 49.466071] kasan_set_track+0x25/0x30 [ 49.466560] kasan_save_free_info+0x2b/0x50 [ 49.467096] __kasan_slab_free+0x10a/0x190 [ 49.467619] kmem_cache_free+0x10d/0x4d0 [ 49.468137] rcu_core+0x8c8/0x2860 [ 49.468578] __do_softirq+0x1b7/0x7d4 [ 49.469054] [ 49.469266] Last potentially related work creation: [ 49.469841] kasan_save_stack+0x22/0x50 [ 49.470350] __kasan_record_aux_stack+0x8e/0xa0 [ 49.470929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.471569] remove_vma+0x139/0x170 [ 49.472015] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.472657] do_vmi_munmap+0x1f1/0x2b0 [ 49.473138] __vm_munmap+0x138/0x3a0 [ 49.473601] __x64_sys_munmap+0x59/0x80 [ 49.474092] do_syscall_64+0x3f/0x90 [ 49.474561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.475208] [ 49.475425] The buggy address belongs to the object at ffff88800e513570 [ 49.475425] which belongs to the cache vm_area_struct of size 168 [ 49.476872] The buggy address is located 88 bytes inside of [ 49.476872] freed 168-byte region [ffff88800e513570, ffff88800e513618) [ 49.478253] [ 49.478465] The buggy address belongs to the physical page: [ 49.479130] page:00000000fb737d83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe513 [ 49.480207] memcg:ffff8880099bd501 [ 49.480627] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.481264] page_type: 0xffffffff() [ 49.481711] raw: 0100000000000200 ffff88800879fc80 ffffea00003da440 dead000000000002 [ 49.482616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099bd501 [ 49.483525] page dumped because: kasan: bad access detected [ 49.484174] [ 49.484386] Memory state around the buggy address: [ 49.484959] ffff88800e513480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.485803] ffff88800e513500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 49.486645] >ffff88800e513580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.487505] ^ [ 49.488172] ffff88800e513600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 49.489024] ffff88800e513680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.489863] ================================================================== [ 49.490883] Disabling lock debugging due to kernel taint [ 51.110762] BUG: Bad rss-counter state mm:00000000ebeb195d type:MM_FILEPAGES val:33 [ 51.111278] BUG: Bad rss-counter state mm:00000000ebeb195d type:MM_ANONPAGES val:22 [ 51.501969] BUG: Bad rss-counter state mm:00000000f3882239 type:MM_FILEPAGES val:33 [ 51.503008] BUG: Bad rss-counter state mm:00000000f3882239 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55074' (ECDSA) to the list of known hosts. 2023/06/19 17:14:50 fuzzer started 2023/06/19 17:14:51 dialing manager at localhost:44161 2023/06/19 17:14:51 checking machine... 2023/06/19 17:14:51 checking revisions... [ 52.221352] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:14:51 testing simple program... [ 52.270766] cgroup: Unknown subsys name 'net' [ 52.307508] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:14:40 Registers: info registers vcpu 0 RAX=ffffffff82270e29 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f0bf701 RSI=ffff88800f0bf748 RDI=ffff88800f0bf748 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff860d68a6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b6b R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800f0bf750 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f0b5d6e2900 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=00007ffc8f7e5000 CR3=000000000dca8000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd154426d10 CR3=000000000cb3c000 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=044e662cceae7fbc214592634e04e3fa XMM02=000000000011ca78ec2efd57dc4c00df XMM03=00000000001236d034dd8a53e0cd6726 XMM04=7702b1d426c8add100000000000ae988 XMM05=e4cb8bb95a7664b60000000000132f00 XMM06=bf38c20417cd07b50000000000131970 XMM07=e042d86d42eb936e0000000000123950 XMM08=34dd8a53e0cd6726000000000011cad8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000