syzkaller login: [ 29.322155] BUG: Bad rss-counter state mm:00000000aa9a0071 type:MM_FILEPAGES val:33 [ 29.323960] BUG: Bad rss-counter state mm:00000000aa9a0071 type:MM_ANONPAGES val:22 [ 29.505828] ================================================================== [ 29.506846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.508006] Read of size 8 at addr ffff888019fddb38 by task sshd/222 [ 29.508854] [ 29.509091] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.510109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.511207] Call Trace: [ 29.511562] [ 29.511885] dump_stack_lvl+0x91/0xf0 [ 29.512430] print_report+0xcc/0x620 [ 29.512983] ? __virt_addr_valid+0x102/0x340 [ 29.513597] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.514271] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.514966] kasan_report+0xbe/0xf0 [ 29.515508] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.516219] vma_interval_tree_remove+0xc75/0xec0 [ 29.516846] vma_prepare+0xc54/0x11a0 [ 29.517379] __split_vma+0x5af/0x950 [ 29.517958] ? __pfx___split_vma+0x10/0x10 [ 29.518565] ? find_held_lock+0x2c/0x110 [ 29.519170] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.519761] ? lock_is_held_type+0x9f/0x120 [ 29.520346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.521039] ? mtree_range_walk+0x632/0x900 [ 29.521705] ? mas_walk+0x5c7/0x7c0 [ 29.522227] do_vmi_munmap+0x1f1/0x2b0 [ 29.522790] mmap_region+0x1f9/0x2660 [ 29.523337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.523925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.524780] ? __pfx_lock_acquire+0x10/0x10 [ 29.525555] ? __pfx_mmap_region+0x10/0x10 [ 29.526343] ? security_mmap_addr+0x7d/0xa0 [ 29.527125] ? get_unmapped_area+0x1f5/0x3f0 [ 29.527933] do_mmap+0x854/0xf00 [ 29.528591] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.529171] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.529856] ksys_mmap_pgoff+0x3af/0x500 [ 29.530438] do_syscall_64+0x3f/0x90 [ 29.531004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.531732] RIP: 0033:0x7f6cfafded82 [ 29.532238] 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 [ 29.534610] RSP: 002b:00007fff27e90658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.535634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cfafded82 [ 29.536538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cfa418000 [ 29.537434] RBP: 00007f6cfa418000 R08: 0000000000000009 R09: 0000000000001000 [ 29.538415] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2e5d9fec0 [ 29.539356] R13: 00007fff27e90670 R14: 00007fff27e906a0 R15: 00007fff27e90a00 [ 29.540286] [ 29.540638] [ 29.540888] Allocated by task 215: [ 29.541380] kasan_save_stack+0x22/0x50 [ 29.542005] kasan_set_track+0x25/0x30 [ 29.542575] __kasan_slab_alloc+0x59/0x70 [ 29.543188] kmem_cache_alloc+0x16b/0x370 [ 29.543735] vm_area_dup+0x20/0x160 [ 29.544221] __split_vma+0x170/0x950 [ 29.544777] split_vma+0xc6/0x110 [ 29.545282] mprotect_fixup+0x8d2/0xb30 [ 29.545895] do_mprotect_pkey+0x87e/0xd40 [ 29.546492] __x64_sys_mprotect+0x78/0xc0 [ 29.547118] do_syscall_64+0x3f/0x90 [ 29.547618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.548282] [ 29.548531] Freed by task 215: [ 29.549002] kasan_save_stack+0x22/0x50 [ 29.549598] kasan_set_track+0x25/0x30 [ 29.550188] kasan_save_free_info+0x2b/0x50 [ 29.550810] __kasan_slab_free+0x10a/0x190 [ 29.551393] kmem_cache_free+0x10d/0x4d0 [ 29.551920] rcu_core+0x8c8/0x2860 [ 29.552401] __do_softirq+0x1b7/0x7d4 [ 29.552962] [ 29.553215] Last potentially related work creation: [ 29.553937] kasan_save_stack+0x22/0x50 [ 29.554522] __kasan_record_aux_stack+0x8e/0xa0 [ 29.555199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.555874] remove_vma+0x139/0x170 [ 29.556371] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.557033] do_vmi_munmap+0x1f1/0x2b0 [ 29.557629] __vm_munmap+0x138/0x3a0 [ 29.558195] __x64_sys_munmap+0x59/0x80 [ 29.558784] do_syscall_64+0x3f/0x90 [ 29.559336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.560099] [ 29.560336] The buggy address belongs to the object at ffff888019fddae0 [ 29.560336] which belongs to the cache vm_area_struct of size 168 [ 29.562000] The buggy address is located 88 bytes inside of [ 29.562000] freed 168-byte region [ffff888019fddae0, ffff888019fddb88) [ 29.563673] [ 29.563944] The buggy address belongs to the physical page: [ 29.564670] page:00000000b8ee2605 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fdd [ 29.565823] memcg:ffff88801679a401 [ 29.566258] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.566942] page_type: 0xffffffff() [ 29.567403] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.568536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801679a401 [ 29.569464] page dumped because: kasan: bad access detected [ 29.570161] [ 29.570381] Memory state around the buggy address: [ 29.570996] ffff888019fdda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.571962] ffff888019fdda80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.572950] >ffff888019fddb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.573865] ^ [ 29.574484] ffff888019fddb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.575361] ffff888019fddc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.576262] ================================================================== [ 29.577301] Disabling lock debugging due to kernel taint [ 31.552298] BUG: Bad rss-counter state mm:00000000c78eb92d type:MM_FILEPAGES val:33 [ 31.553219] BUG: Bad rss-counter state mm:00000000c78eb92d type:MM_ANONPAGES val:22 [ 32.075594] BUG: Bad rss-counter state mm:000000009c74075d type:MM_FILEPAGES val:33 [ 32.076713] BUG: Bad rss-counter state mm:000000009c74075d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43416' (ECDSA) to the list of known hosts. 2023/06/19 14:16:32 fuzzer started 2023/06/19 14:16:32 dialing manager at localhost:44161 2023/06/19 14:16:32 checking machine... 2023/06/19 14:16:32 checking revisions... [ 32.667119] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:16:32 testing simple program... [ 32.728140] cgroup: Unknown subsys name 'net' [ 32.776680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:16:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff84506c8b RDX=000000000003506c RSI=000000000003506c RDI=ffffffff865bbd70 RBP=ffff88800cbdfa40 RSP=ffff88800cbdf978 R8 =0000000000000000 R9 =ffff88800cbdfa28 R10=0000000000038001 R11=00000000000b5311 R12=ffff88800cbdfa48 R13=ffff88800cbdfa30 R14=ffff88800cbdfa29 R15=ffff88800cbdf9e8 RIP=ffffffff8113077a RFL=00000212 [----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 00007f41663f7900 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=00007ffd9f2d7ff8 CR3=0000000019df8000 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=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 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=00007feeafd02690 CR3=000000000c548000 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=2031333a36313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000