syzkaller login: [ 28.794318] BUG: Bad rss-counter state mm:0000000043576466 type:MM_FILEPAGES val:33 [ 28.795414] BUG: Bad rss-counter state mm:0000000043576466 type:MM_ANONPAGES val:22 [ 28.849950] ================================================================== [ 28.850852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.851778] Read of size 8 at addr ffff888019dc4058 by task sshd/220 [ 28.852545] [ 28.852760] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.853617] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.854597] Call Trace: [ 28.854915] [ 28.855202] dump_stack_lvl+0x91/0xf0 [ 28.855799] print_report+0xcc/0x620 [ 28.856289] ? __virt_addr_valid+0x102/0x340 [ 28.856849] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.857464] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.858083] kasan_report+0xbe/0xf0 [ 28.858584] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.859211] vma_interval_tree_remove+0xc75/0xec0 [ 28.859809] vma_prepare+0xc54/0x11a0 [ 28.860286] __split_vma+0x5af/0x950 [ 28.860755] ? __pfx___split_vma+0x10/0x10 [ 28.861280] ? find_held_lock+0x2c/0x110 [ 28.861799] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.862358] ? lock_is_held_type+0x9f/0x120 [ 28.862903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.863508] ? mtree_range_walk+0x632/0x900 [ 28.864062] ? mas_walk+0x5c7/0x7c0 [ 28.864542] do_vmi_munmap+0x1f1/0x2b0 [ 28.865031] mmap_region+0x1f9/0x2660 [ 28.865517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.866028] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.866747] ? __pfx_lock_acquire+0x10/0x10 [ 28.867276] ? __pfx_mmap_region+0x10/0x10 [ 28.867803] ? security_mmap_addr+0x7d/0xa0 [ 28.868334] ? get_unmapped_area+0x1f5/0x3f0 [ 28.868885] do_mmap+0x854/0xf00 [ 28.869324] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.869821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.870383] ksys_mmap_pgoff+0x3af/0x500 [ 28.870913] do_syscall_64+0x3f/0x90 [ 28.871392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.872034] RIP: 0033:0x7f29881b5d82 [ 28.872496] 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 [ 28.874665] RSP: 002b:00007fff169b9c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.875577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29881b5d82 [ 28.876426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29875ef000 [ 28.877271] RBP: 00007f29875ef000 R08: 0000000000000009 R09: 0000000000001000 [ 28.878120] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e67a22b20 [ 28.878971] R13: 00007fff169b9ca0 R14: 00007fff169b9cd0 R15: 00007fff169ba030 [ 28.879821] [ 28.880113] [ 28.880329] Allocated by task 213: [ 28.880756] kasan_save_stack+0x22/0x50 [ 28.881260] kasan_set_track+0x25/0x30 [ 28.881753] __kasan_slab_alloc+0x59/0x70 [ 28.882271] kmem_cache_alloc+0x16b/0x370 [ 28.882807] vm_area_dup+0x20/0x160 [ 28.883254] __split_vma+0x170/0x950 [ 28.883717] split_vma+0xc6/0x110 [ 28.884162] mprotect_fixup+0x8d2/0xb30 [ 28.884658] do_mprotect_pkey+0x87e/0xd40 [ 28.885183] __x64_sys_mprotect+0x78/0xc0 [ 28.885706] do_syscall_64+0x3f/0x90 [ 28.886180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.886834] [ 28.887049] Freed by task 213: [ 28.887446] kasan_save_stack+0x22/0x50 [ 28.887951] kasan_set_track+0x25/0x30 [ 28.888448] kasan_save_free_info+0x2b/0x50 [ 28.888979] __kasan_slab_free+0x10a/0x190 [ 28.889502] kmem_cache_free+0x10d/0x4d0 [ 28.890008] rcu_core+0x8c8/0x2860 [ 28.890468] __do_softirq+0x1b7/0x7d4 [ 28.890944] [ 28.891155] Last potentially related work creation: [ 28.891738] kasan_save_stack+0x22/0x50 [ 28.892234] __kasan_record_aux_stack+0x8e/0xa0 [ 28.892809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.893445] remove_vma+0x139/0x170 [ 28.893891] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.894454] do_vmi_munmap+0x1f1/0x2b0 [ 28.894941] __vm_munmap+0x138/0x3a0 [ 28.895403] __x64_sys_munmap+0x59/0x80 [ 28.895899] do_syscall_64+0x3f/0x90 [ 28.896386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.897066] [ 28.897288] The buggy address belongs to the object at ffff888019dc4000 [ 28.897288] which belongs to the cache vm_area_struct of size 168 [ 28.898826] The buggy address is located 88 bytes inside of [ 28.898826] freed 168-byte region [ffff888019dc4000, ffff888019dc40a8) [ 28.900285] [ 28.900509] The buggy address belongs to the physical page: [ 28.901210] page:00000000f755cc0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dc4 [ 28.902342] memcg:ffff888019dc5001 [ 28.902796] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.903472] page_type: 0xffffffff() [ 28.903939] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.904899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dc5001 [ 28.905850] page dumped because: kasan: bad access detected [ 28.906546] [ 28.906769] Memory state around the buggy address: [ 28.907380] ffff888019dc3f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.908274] ffff888019dc3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.909170] >ffff888019dc4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.910058] ^ [ 28.910820] ffff888019dc4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.911707] ffff888019dc4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.912588] ================================================================== [ 28.913644] Disabling lock debugging due to kernel taint [ 30.906656] BUG: Bad rss-counter state mm:00000000ca624753 type:MM_FILEPAGES val:32 [ 30.907810] BUG: Bad rss-counter state mm:00000000ca624753 type:MM_ANONPAGES val:22 [ 31.305475] BUG: Bad rss-counter state mm:000000006c3c89f0 type:MM_FILEPAGES val:33 [ 31.306713] BUG: Bad rss-counter state mm:000000006c3c89f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46497' (ECDSA) to the list of known hosts. 2023/06/20 14:16:55 fuzzer started 2023/06/20 14:16:55 dialing manager at localhost:36067 2023/06/20 14:16:55 checking machine... 2023/06/20 14:16:55 checking revisions... [ 32.017261] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:16:55 testing simple program... [ 32.066943] cgroup: Unknown subsys name 'net' [ 32.105649] cgroup: Unknown subsys name 'rlimit' executing program [ 37.545229] BUG: Bad rss-counter state mm:000000006c31f982 type:MM_FILEPAGES val:181 [ 37.546246] BUG: Bad rss-counter state mm:000000006c31f982 type:MM_ANONPAGES val:50 executing program executing program VM DIAGNOSIS: 14:16:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652b60 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c8467 RDI=ffffffff85652b60 RBP=ffffffff866212df RSP=ffff88806ce09a18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff866212df R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801bf3e1b0 RIP=ffffffff8135bd4f 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 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=00007fa5befec0e0 CR3=000000000f804000 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=2567f898c38b8cbc994a05125f03ed1c XMM02=ec2efd57dc4c00df000000000011a490 XMM03=4b9314551eb99a31000000000011a560 XMM04=170434a3673638b200000000000ae988 XMM05=ed88756fcf618f5900000000001325c8 XMM06=4fda316b135da52b0000000000131668 XMM07=e042d86d42eb936e0000000000121c20 XMM08=4b9314551eb99a31000000000011a560 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff83636c06 RCX=0000000000000001 RDX=1ffff1100281aeec RSI=ffff8880140d7cb0 RDI=ffffffff83636c06 RBP=ffffffff83636c06 RSP=ffff8880140d76c0 R8 =0000000000000001 R9 =ffff8880140d7748 R10=0000000000038001 R11=0000000000091bda R12=ffff8880140d77d0 R13=0000000000000000 R14=ffff888019ff51c0 R15=0000000000000001 RIP=ffffffff811fc6f0 RFL=00000292 [--S-A--] 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 00007f0b01d08900 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=00007fff88c7a000 CR3=000000001cdfe000 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=6720646572637465733a4d41503d706f 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