syzkaller login: [ 30.576161] BUG: Bad rss-counter state mm:0000000086bf954f type:MM_FILEPAGES val:33 [ 30.577424] BUG: Bad rss-counter state mm:0000000086bf954f type:MM_ANONPAGES val:22 [ 30.697401] ================================================================== [ 30.698327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.699294] Read of size 8 at addr ffff888016ca3798 by task sshd/220 [ 30.700090] [ 30.700421] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.701376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.702380] Call Trace: [ 30.702713] [ 30.703004] dump_stack_lvl+0x91/0xf0 [ 30.703500] print_report+0xcc/0x620 [ 30.704001] ? __virt_addr_valid+0x102/0x340 [ 30.704558] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705217] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705852] kasan_report+0xbe/0xf0 [ 30.706332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706974] vma_interval_tree_remove+0xc75/0xec0 [ 30.707580] vma_prepare+0xc54/0x11a0 [ 30.708074] __split_vma+0x5af/0x950 [ 30.708555] ? __pfx___split_vma+0x10/0x10 [ 30.709129] ? find_held_lock+0x2c/0x110 [ 30.709651] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.710241] ? lock_is_held_type+0x9f/0x120 [ 30.710799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.711416] ? mtree_range_walk+0x632/0x900 [ 30.711984] ? mas_walk+0x5c7/0x7c0 [ 30.712460] do_vmi_munmap+0x1f1/0x2b0 [ 30.713008] mmap_region+0x1f9/0x2660 [ 30.713501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.714039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.714782] ? __pfx_lock_acquire+0x10/0x10 [ 30.715320] ? __pfx_mmap_region+0x10/0x10 [ 30.715867] ? security_mmap_addr+0x7d/0xa0 [ 30.716400] ? get_unmapped_area+0x1f5/0x3f0 [ 30.716999] do_mmap+0x854/0xf00 [ 30.717458] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.717975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.718539] ksys_mmap_pgoff+0x3af/0x500 [ 30.719064] do_syscall_64+0x3f/0x90 [ 30.719544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.720203] RIP: 0033:0x7f012d180d82 [ 30.720665] 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 [ 30.722873] RSP: 002b:00007ffc8554ca38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.723813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f012d180d82 [ 30.724735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f012c5ba000 [ 30.725890] RBP: 00007f012c5ba000 R08: 0000000000000009 R09: 0000000000001000 [ 30.727025] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579203b1f60 [ 30.728002] R13: 00007ffc8554ca50 R14: 00007ffc8554ca80 R15: 00007ffc8554cde0 [ 30.728926] [ 30.729260] [ 30.729472] Allocated by task 213: [ 30.729913] kasan_save_stack+0x22/0x50 [ 30.730416] kasan_set_track+0x25/0x30 [ 30.730925] __kasan_slab_alloc+0x59/0x70 [ 30.731449] kmem_cache_alloc+0x16b/0x370 [ 30.731998] vm_area_dup+0x20/0x160 [ 30.732455] __split_vma+0x170/0x950 [ 30.732945] split_vma+0xc6/0x110 [ 30.733406] mprotect_fixup+0x8d2/0xb30 [ 30.733923] do_mprotect_pkey+0x87e/0xd40 [ 30.734442] __x64_sys_mprotect+0x78/0xc0 [ 30.734979] do_syscall_64+0x3f/0x90 [ 30.735452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.736121] [ 30.736334] Freed by task 213: [ 30.736740] kasan_save_stack+0x22/0x50 [ 30.737283] kasan_set_track+0x25/0x30 [ 30.737791] kasan_save_free_info+0x2b/0x50 [ 30.738326] __kasan_slab_free+0x10a/0x190 [ 30.738874] kmem_cache_free+0x10d/0x4d0 [ 30.739381] rcu_core+0x8c8/0x2860 [ 30.739858] __do_softirq+0x1b7/0x7d4 [ 30.740341] [ 30.740557] Last potentially related work creation: [ 30.741171] kasan_save_stack+0x22/0x50 [ 30.741712] __kasan_record_aux_stack+0x8e/0xa0 [ 30.742293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.742956] remove_vma+0x139/0x170 [ 30.743408] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.743991] do_vmi_munmap+0x1f1/0x2b0 [ 30.744477] __vm_munmap+0x138/0x3a0 [ 30.744964] __x64_sys_munmap+0x59/0x80 [ 30.745497] do_syscall_64+0x3f/0x90 [ 30.745993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746636] [ 30.746885] The buggy address belongs to the object at ffff888016ca3740 [ 30.746885] which belongs to the cache vm_area_struct of size 168 [ 30.748386] The buggy address is located 88 bytes inside of [ 30.748386] freed 168-byte region [ffff888016ca3740, ffff888016ca37e8) [ 30.749897] [ 30.750114] The buggy address belongs to the physical page: [ 30.750783] page:0000000096e16c07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ca3 [ 30.751906] memcg:ffff88800f077c01 [ 30.752337] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.753024] page_type: 0xffffffff() [ 30.753476] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.754411] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f077c01 [ 30.755337] page dumped because: kasan: bad access detected [ 30.756024] [ 30.756240] Memory state around the buggy address: [ 30.756860] ffff888016ca3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.757764] ffff888016ca3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.758636] >ffff888016ca3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.759522] ^ [ 30.760042] ffff888016ca3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.760936] ffff888016ca3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.761834] ================================================================== [ 30.762780] Disabling lock debugging due to kernel taint [ 32.353644] BUG: Bad rss-counter state mm:0000000018575f3a type:MM_FILEPAGES val:33 [ 32.354771] BUG: Bad rss-counter state mm:0000000018575f3a type:MM_ANONPAGES val:22 [ 32.804728] BUG: Bad rss-counter state mm:0000000010e35378 type:MM_FILEPAGES val:33 [ 32.805718] BUG: Bad rss-counter state mm:0000000010e35378 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56861' (ECDSA) to the list of known hosts. 2023/06/20 18:04:05 fuzzer started 2023/06/20 18:04:05 dialing manager at localhost:36067 2023/06/20 18:04:05 checking machine... 2023/06/20 18:04:05 checking revisions... [ 33.519751] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:04:05 testing simple program... [ 33.552624] cgroup: Unknown subsys name 'net' [ 33.592581] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:04:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff864b3701 RDX=1ffff1100d9c1385 RSI=ffffffff845137d7 RDI=ffff88806ce09b6c RBP=ffff88806ce09c28 RSP=ffff88806ce09a78 R8 =ffffffff864b37a6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801be437a0 RIP=ffffffff813ad547 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=00007ffc28150ff8 CR3=0000000005482000 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=00007ff0342bc510000055c7b8985790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83637120 RBX=ffffffff85fa4c38 RCX=ffffffff836373c9 RDX=0000000000000000 RSI=ffffffff863b30b6 RDI=ffffffff85fa4c38 RBP=ffffffff85fa4c3c RSP=ffff88801427f150 R8 =ffffffff863b30b6 R9 =ffff88801427f248 R10=0000000000038001 R11=000000000008a89d R12=ffffffff85fa4c38 R13=ffffffff85fa4c38 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007fc6b4e05900 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=00007fbb92e37650 CR3=000000000d934000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=232e30640e882c0000000000000ae988 XMM05=9785876b39763e440000000000132ff8 XMM06=19e9129bd510f2350000000000131e58 XMM07=fb795ef6d65770560000000000121ff8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000