syzkaller login: [ 30.950410] BUG: Bad rss-counter state mm:00000000c6344381 type:MM_FILEPAGES val:33 [ 30.951855] BUG: Bad rss-counter state mm:00000000c6344381 type:MM_ANONPAGES val:22 [ 31.060591] ================================================================== [ 31.061650] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.062756] Read of size 8 at addr ffff88800c5473f8 by task sshd/220 [ 31.063869] [ 31.064058] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.064722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.065465] Call Trace: [ 31.065722] [ 31.065936] dump_stack_lvl+0x91/0xf0 [ 31.066313] print_report+0xcc/0x620 [ 31.066686] ? __virt_addr_valid+0x102/0x340 [ 31.067120] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.067589] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.068054] kasan_report+0xbe/0xf0 [ 31.068411] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.068882] vma_interval_tree_remove+0xc75/0xec0 [ 31.069333] vma_prepare+0xc54/0x11a0 [ 31.069697] __split_vma+0x5af/0x950 [ 31.070060] ? __pfx___split_vma+0x10/0x10 [ 31.070460] ? find_held_lock+0x2c/0x110 [ 31.070854] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.071290] ? lock_is_held_type+0x9f/0x120 [ 31.071701] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.072161] ? mtree_range_walk+0x632/0x900 [ 31.072582] ? mas_walk+0x5c7/0x7c0 [ 31.072942] do_vmi_munmap+0x1f1/0x2b0 [ 31.073313] mmap_region+0x1f9/0x2660 [ 31.073681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.074067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.074607] ? __pfx_lock_acquire+0x10/0x10 [ 31.075009] ? __pfx_mmap_region+0x10/0x10 [ 31.075436] ? security_mmap_addr+0x7d/0xa0 [ 31.075840] ? get_unmapped_area+0x1f5/0x3f0 [ 31.076202] do_mmap+0x854/0xf00 [ 31.076470] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.076781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.077127] ksys_mmap_pgoff+0x3af/0x500 [ 31.077440] do_syscall_64+0x3f/0x90 [ 31.077733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.078136] RIP: 0033:0x7fd2d6cb5d82 [ 31.078422] 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 [ 31.079756] RSP: 002b:00007fff469142d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.080318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2d6cb5d82 [ 31.080849] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2d60ef000 [ 31.081372] RBP: 00007fd2d60ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.081896] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2ef029ec0 [ 31.082424] R13: 00007fff469142f0 R14: 00007fff46914320 R15: 00007fff46914680 [ 31.082960] [ 31.083149] [ 31.083281] Allocated by task 213: [ 31.083553] kasan_save_stack+0x22/0x50 [ 31.083862] kasan_set_track+0x25/0x30 [ 31.084162] __kasan_slab_alloc+0x59/0x70 [ 31.084488] kmem_cache_alloc+0x16b/0x370 [ 31.084811] vm_area_dup+0x20/0x160 [ 31.085092] __split_vma+0x170/0x950 [ 31.085387] split_vma+0xc6/0x110 [ 31.085666] mprotect_fixup+0x8d2/0xb30 [ 31.085974] do_mprotect_pkey+0x87e/0xd40 [ 31.086293] __x64_sys_mprotect+0x78/0xc0 [ 31.086623] do_syscall_64+0x3f/0x90 [ 31.086920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.087333] [ 31.087463] Freed by task 203: [ 31.087708] kasan_save_stack+0x22/0x50 [ 31.088024] kasan_set_track+0x25/0x30 [ 31.088325] kasan_save_free_info+0x2b/0x50 [ 31.088655] __kasan_slab_free+0x10a/0x190 [ 31.088977] kmem_cache_free+0x10d/0x4d0 [ 31.089293] rcu_core+0x8c8/0x2860 [ 31.089568] __do_softirq+0x1b7/0x7d4 [ 31.089860] [ 31.089991] Last potentially related work creation: [ 31.090361] kasan_save_stack+0x22/0x50 [ 31.090678] __kasan_record_aux_stack+0x8e/0xa0 [ 31.091040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.091439] remove_vma+0x139/0x170 [ 31.091716] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.092057] do_vmi_munmap+0x1f1/0x2b0 [ 31.092350] __vm_munmap+0x138/0x3a0 [ 31.092635] __x64_sys_munmap+0x59/0x80 [ 31.092945] do_syscall_64+0x3f/0x90 [ 31.093234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.093636] [ 31.093766] The buggy address belongs to the object at ffff88800c5473a0 [ 31.093766] which belongs to the cache vm_area_struct of size 168 [ 31.094683] The buggy address is located 88 bytes inside of [ 31.094683] freed 168-byte region [ffff88800c5473a0, ffff88800c547448) [ 31.095558] [ 31.095693] The buggy address belongs to the physical page: [ 31.096100] page:00000000560d2ad2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc547 [ 31.096766] memcg:ffff888017196501 [ 31.097033] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.097428] page_type: 0xffffffff() [ 31.097705] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.098272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017196501 [ 31.098836] page dumped because: kasan: bad access detected [ 31.099267] [ 31.099397] Memory state around the buggy address: [ 31.099762] ffff88800c547280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.100290] ffff88800c547300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.100813] >ffff88800c547380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.101349] ^ [ 31.101876] ffff88800c547400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.102408] ffff88800c547480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.102934] ================================================================== [ 31.103517] Disabling lock debugging due to kernel taint [ 32.912178] BUG: Bad rss-counter state mm:000000003a37d39b type:MM_FILEPAGES val:33 [ 32.912951] BUG: Bad rss-counter state mm:000000003a37d39b type:MM_ANONPAGES val:22 [ 33.317712] BUG: Bad rss-counter state mm:00000000a493a666 type:MM_FILEPAGES val:33 [ 33.318448] BUG: Bad rss-counter state mm:00000000a493a666 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53561' (ECDSA) to the list of known hosts. 2023/06/21 10:48:37 fuzzer started 2023/06/21 10:48:37 dialing manager at localhost:36067 2023/06/21 10:48:37 checking machine... 2023/06/21 10:48:37 checking revisions... [ 33.988906] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:48:37 testing simple program... [ 34.041304] cgroup: Unknown subsys name 'net' [ 34.098910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:48:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f459d4f9580 CR3=000000000d920000 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=cbbb8c7a156783a3684dad15793dc609 XMM02=eff9b2d0a8fce9cb000000000011a308 XMM03=2c67c8bc2e329bc3000000000011a430 XMM04=f381a4efa6c2642c00000000000ae988 XMM05=edb89ab03a8ba8da0000000000132b88 XMM06=4fda316b135da52b0000000000131978 XMM07=fb795ef6d65770560000000000121ca0 XMM08=2c67c8bc2e329bc3000000000011a430 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019bc77c0 RCX=0000000000000001 RDX=1ffff11003378f0d RSI=ffffffff83867afd RDI=ffff888019bc77cc RBP=ffff888019bc7868 RSP=ffff888019bc76d8 R8 =0000000000000001 R9 =ffff888019bc7738 R10=0000000000038001 R11=000000000008b92e R12=ffff888019bc77c0 R13=0000000000000000 R14=ffff888016d13680 R15=0000000000000024 RIP=ffffffff813ad549 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 00007f0e6f6ec900 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=00007ffc59f28000 CR3=000000001ba9e000 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=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