syzkaller login: [ 37.696847] BUG: Bad rss-counter state mm:00000000af8498bf type:MM_FILEPAGES val:33 [ 37.699028] BUG: Bad rss-counter state mm:00000000af8498bf type:MM_ANONPAGES val:22 [ 37.861396] ================================================================== [ 37.862340] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.863326] Read of size 8 at addr ffff888019ee2228 by task sshd/221 [ 37.864192] [ 37.864416] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.865328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.866370] Call Trace: [ 37.866711] [ 37.867005] dump_stack_lvl+0x91/0xf0 [ 37.867511] print_report+0xcc/0x620 [ 37.868016] ? __virt_addr_valid+0x102/0x340 [ 37.868591] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.869260] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.869905] kasan_report+0xbe/0xf0 [ 37.870397] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.871039] vma_interval_tree_remove+0xc75/0xec0 [ 37.871673] vma_prepare+0xc54/0x11a0 [ 37.872186] __split_vma+0x5af/0x950 [ 37.872683] ? __pfx___split_vma+0x10/0x10 [ 37.873250] ? find_held_lock+0x2c/0x110 [ 37.873793] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.874392] ? lock_is_held_type+0x9f/0x120 [ 37.874971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.875598] ? mtree_range_walk+0x632/0x900 [ 37.876184] ? mas_walk+0x5c7/0x7c0 [ 37.876673] do_vmi_munmap+0x1f1/0x2b0 [ 37.877204] mmap_region+0x1f9/0x2660 [ 37.877712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.878254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.879004] ? __pfx_lock_acquire+0x10/0x10 [ 37.879560] ? __pfx_mmap_region+0x10/0x10 [ 37.880108] ? security_mmap_addr+0x7d/0xa0 [ 37.880663] ? get_unmapped_area+0x1f5/0x3f0 [ 37.881259] do_mmap+0x854/0xf00 [ 37.881709] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.882222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.882811] ksys_mmap_pgoff+0x3af/0x500 [ 37.883341] do_syscall_64+0x3f/0x90 [ 37.883839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.884509] RIP: 0033:0x7f649e66dd82 [ 37.884983] 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 [ 37.887250] RSP: 002b:00007ffcd1d71c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.888197] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f649e66dd82 [ 37.889091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f649daa7000 [ 37.890009] RBP: 00007f649daa7000 R08: 0000000000000009 R09: 0000000000001000 [ 37.890903] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1379b4ec0 [ 37.891784] R13: 00007ffcd1d71c50 R14: 00007ffcd1d71c80 R15: 00007ffcd1d71fe0 [ 37.892679] [ 37.892994] [ 37.893226] Allocated by task 214: [ 37.893679] kasan_save_stack+0x22/0x50 [ 37.894212] kasan_set_track+0x25/0x30 [ 37.894747] __kasan_slab_alloc+0x59/0x70 [ 37.895296] kmem_cache_alloc+0x16b/0x370 [ 37.895841] vm_area_dup+0x20/0x160 [ 37.896320] __split_vma+0x170/0x950 [ 37.896821] split_vma+0xc6/0x110 [ 37.897301] mprotect_fixup+0x8d2/0xb30 [ 37.897820] do_mprotect_pkey+0x87e/0xd40 [ 37.898368] __x64_sys_mprotect+0x78/0xc0 [ 37.898912] do_syscall_64+0x3f/0x90 [ 37.899404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.900077] [ 37.900307] Freed by task 214: [ 37.900730] kasan_save_stack+0x22/0x50 [ 37.901270] kasan_set_track+0x25/0x30 [ 37.901779] kasan_save_free_info+0x2b/0x50 [ 37.902344] __kasan_slab_free+0x10a/0x190 [ 37.902915] kmem_cache_free+0x10d/0x4d0 [ 37.903447] rcu_core+0x8c8/0x2860 [ 37.903923] __do_softirq+0x1b7/0x7d4 [ 37.904435] [ 37.904668] Last potentially related work creation: [ 37.905296] kasan_save_stack+0x22/0x50 [ 37.905826] __kasan_record_aux_stack+0x8e/0xa0 [ 37.906444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.907126] remove_vma+0x139/0x170 [ 37.907604] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.908192] do_vmi_munmap+0x1f1/0x2b0 [ 37.908700] __vm_munmap+0x138/0x3a0 [ 37.909208] __x64_sys_munmap+0x59/0x80 [ 37.909713] do_syscall_64+0x3f/0x90 [ 37.910185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.910830] [ 37.911049] The buggy address belongs to the object at ffff888019ee21d0 [ 37.911049] which belongs to the cache vm_area_struct of size 168 [ 37.912537] The buggy address is located 88 bytes inside of [ 37.912537] freed 168-byte region [ffff888019ee21d0, ffff888019ee2278) [ 37.913958] [ 37.914175] The buggy address belongs to the physical page: [ 37.914850] page:0000000014496ad0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ee2 [ 37.915954] memcg:ffff888016ed3c01 [ 37.916381] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.917030] page_type: 0xffffffff() [ 37.917501] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.918426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ed3c01 [ 37.919337] page dumped because: kasan: bad access detected [ 37.919989] [ 37.920203] Memory state around the buggy address: [ 37.920774] ffff888019ee2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.921633] ffff888019ee2180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.922474] >ffff888019ee2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.923314] ^ [ 37.923865] ffff888019ee2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.924716] ffff888019ee2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.925576] ================================================================== [ 37.926633] Disabling lock debugging due to kernel taint [ 40.351051] BUG: Bad rss-counter state mm:000000008d6f2b05 type:MM_FILEPAGES val:33 [ 40.352052] BUG: Bad rss-counter state mm:000000008d6f2b05 type:MM_ANONPAGES val:22 [ 40.899465] BUG: Bad rss-counter state mm:000000000b365883 type:MM_FILEPAGES val:33 [ 40.900641] BUG: Bad rss-counter state mm:000000000b365883 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45500' (ECDSA) to the list of known hosts. 2023/06/19 11:05:20 fuzzer started 2023/06/19 11:05:20 dialing manager at localhost:44161 2023/06/19 11:05:20 checking machine... 2023/06/19 11:05:20 checking revisions... [ 41.533612] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:05:20 testing simple program... [ 41.588606] cgroup: Unknown subsys name 'net' [ 41.628926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc7db82f180 CR3=000000000e594000 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=2039313a35303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a35303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001a1811d RBX=ffff88800d0c08b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d0c08e8 RBP=ffff88800c23b188 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff88800c1fda70 R14=ffffffff813782a8 R15=ffff88800d72aa80 RIP=ffffffff81846362 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6ed7d4e900 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=00007f6ed7e0b50c CR3=000000000e718000 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