syzkaller login: [ 31.457043] BUG: Bad rss-counter state mm:0000000055fdd759 type:MM_FILEPAGES val:33 [ 31.458235] BUG: Bad rss-counter state mm:0000000055fdd759 type:MM_ANONPAGES val:22 [ 31.494590] ================================================================== [ 31.495319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.496026] Read of size 8 at addr ffff88800f5d3c20 by task sshd/220 [ 31.496601] [ 31.496766] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.497416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.498246] Call Trace: [ 31.498490] [ 31.498712] dump_stack_lvl+0x91/0xf0 [ 31.499087] print_report+0xcc/0x620 [ 31.499458] ? __virt_addr_valid+0x102/0x340 [ 31.499876] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.500368] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.500836] kasan_report+0xbe/0xf0 [ 31.501198] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.501670] vma_interval_tree_remove+0xc75/0xec0 [ 31.502129] vma_prepare+0xc54/0x11a0 [ 31.502493] __split_vma+0x5af/0x950 [ 31.502863] ? __pfx___split_vma+0x10/0x10 [ 31.503265] ? find_held_lock+0x2c/0x110 [ 31.503662] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.504089] ? lock_is_held_type+0x9f/0x120 [ 31.504502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.504956] ? mtree_range_walk+0x632/0x900 [ 31.505376] ? mas_walk+0x5c7/0x7c0 [ 31.505740] do_vmi_munmap+0x1f1/0x2b0 [ 31.506112] mmap_region+0x1f9/0x2660 [ 31.506480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.506889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.507430] ? __pfx_lock_acquire+0x10/0x10 [ 31.507795] ? __pfx_mmap_region+0x10/0x10 [ 31.508128] ? security_mmap_addr+0x7d/0xa0 [ 31.508465] ? get_unmapped_area+0x1f5/0x3f0 [ 31.508812] do_mmap+0x854/0xf00 [ 31.509089] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.509403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.509754] ksys_mmap_pgoff+0x3af/0x500 [ 31.510075] do_syscall_64+0x3f/0x90 [ 31.510379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.510795] RIP: 0033:0x7f66ec354d82 [ 31.511084] 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 [ 31.512417] RSP: 002b:00007ffff0f44ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.512983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66ec354d82 [ 31.513516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66eb78e000 [ 31.514043] RBP: 00007f66eb78e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.514569] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdbca80f70 [ 31.515099] R13: 00007ffff0f44ee0 R14: 00007ffff0f44f10 R15: 00007ffff0f45270 [ 31.515631] [ 31.515814] [ 31.515951] Allocated by task 213: [ 31.516221] kasan_save_stack+0x22/0x50 [ 31.516538] kasan_set_track+0x25/0x30 [ 31.516847] __kasan_slab_alloc+0x59/0x70 [ 31.517175] kmem_cache_alloc+0x16b/0x370 [ 31.517500] vm_area_dup+0x20/0x160 [ 31.517787] __split_vma+0x170/0x950 [ 31.518079] split_vma+0xc6/0x110 [ 31.518359] mprotect_fixup+0x8d2/0xb30 [ 31.518677] do_mprotect_pkey+0x87e/0xd40 [ 31.519022] __x64_sys_mprotect+0x78/0xc0 [ 31.519353] do_syscall_64+0x3f/0x90 [ 31.519654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.520059] [ 31.520198] Freed by task 213: [ 31.520447] kasan_save_stack+0x22/0x50 [ 31.520766] kasan_set_track+0x25/0x30 [ 31.521077] kasan_save_free_info+0x2b/0x50 [ 31.521416] __kasan_slab_free+0x10a/0x190 [ 31.521754] kmem_cache_free+0x10d/0x4d0 [ 31.522075] rcu_core+0x8c8/0x2860 [ 31.522357] __do_softirq+0x1b7/0x7d4 [ 31.522663] [ 31.522816] Last potentially related work creation: [ 31.523183] kasan_save_stack+0x22/0x50 [ 31.523501] __kasan_record_aux_stack+0x8e/0xa0 [ 31.523861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.524266] remove_vma+0x139/0x170 [ 31.524550] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.524900] do_vmi_munmap+0x1f1/0x2b0 [ 31.525209] __vm_munmap+0x138/0x3a0 [ 31.525503] __x64_sys_munmap+0x59/0x80 [ 31.525819] do_syscall_64+0x3f/0x90 [ 31.526119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.526523] [ 31.526660] The buggy address belongs to the object at ffff88800f5d3bc8 [ 31.526660] which belongs to the cache vm_area_struct of size 168 [ 31.527599] The buggy address is located 88 bytes inside of [ 31.527599] freed 168-byte region [ffff88800f5d3bc8, ffff88800f5d3c70) [ 31.528555] [ 31.528705] The buggy address belongs to the physical page: [ 31.529185] page:00000000307efd0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5d3 [ 31.529943] memcg:ffff88800dc1e601 [ 31.530241] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.530696] page_type: 0xffffffff() [ 31.531018] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.531664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc1e601 [ 31.532302] page dumped because: kasan: bad access detected [ 31.532761] [ 31.532911] Memory state around the buggy address: [ 31.533312] ffff88800f5d3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.533908] ffff88800f5d3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.534510] >ffff88800f5d3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.535117] ^ [ 31.535482] ffff88800f5d3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.536073] ffff88800f5d3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.536674] ================================================================== [ 31.537456] Disabling lock debugging due to kernel taint [ 33.573281] BUG: Bad rss-counter state mm:000000009fad8ac8 type:MM_FILEPAGES val:33 [ 33.574450] BUG: Bad rss-counter state mm:000000009fad8ac8 type:MM_ANONPAGES val:22 [ 34.089833] BUG: Bad rss-counter state mm:000000007c2d63ad type:MM_FILEPAGES val:33 [ 34.091109] BUG: Bad rss-counter state mm:000000007c2d63ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30790' (ECDSA) to the list of known hosts. 2023/06/20 18:13:36 fuzzer started 2023/06/20 18:13:36 dialing manager at localhost:36067 2023/06/20 18:13:37 checking machine... 2023/06/20 18:13:37 checking revisions... [ 34.872005] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:13:37 testing simple program... [ 34.923923] cgroup: Unknown subsys name 'net' [ 34.962486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:13:36 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09918 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f186 RFL=00000282 [--S----] 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=00007f14f652c040 CR3=000000000c8e0000 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=093162e0b3957da52d4e202c3e6e5cc7 XMM02=000000000011b668ec2efd57dc4c00df XMM03=0000000000121f303eb4e46258b1935e XMM04=37668d004f59594c00000000000ae988 XMM05=19e9129bd510f2350000000000131d58 XMM06=4fda316b135da52b0000000000131be0 XMM07=e042d86d42eb936e00000000001221b0 XMM08=3eb4e46258b1935e000000000011b6c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000003 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8113baf1 RBP=ffff88800fce7f58 RSP=ffff88800fce7ec8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000007 R13=00007f600c0f93ec R14=00007f600c0f93ec R15=ffff888016611280 RIP=ffffffff84511935 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 00007f600b987900 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=00007f600c0f93ec CR3=000000000e96c000 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