syzkaller login: [ 39.765374] BUG: Bad rss-counter state mm:0000000021ca827b type:MM_FILEPAGES val:33 [ 39.766507] BUG: Bad rss-counter state mm:0000000021ca827b type:MM_ANONPAGES val:22 [ 39.941198] ================================================================== [ 39.942326] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.943438] Read of size 8 at addr ffff88800caff798 by task sshd/220 [ 39.944530] [ 39.944798] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.945828] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.946926] Call Trace: [ 39.947263] [ 39.947564] dump_stack_lvl+0x91/0xf0 [ 39.948095] print_report+0xcc/0x620 [ 39.948611] ? __virt_addr_valid+0x102/0x340 [ 39.949200] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.949865] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.950538] kasan_report+0xbe/0xf0 [ 39.951066] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.951743] vma_interval_tree_remove+0xc75/0xec0 [ 39.952410] vma_prepare+0xc54/0x11a0 [ 39.952939] __split_vma+0x5af/0x950 [ 39.953467] ? __pfx___split_vma+0x10/0x10 [ 39.954063] ? find_held_lock+0x2c/0x110 [ 39.954643] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.955263] ? lock_is_held_type+0x9f/0x120 [ 39.955858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.956528] ? mtree_range_walk+0x632/0x900 [ 39.957137] ? mas_walk+0x5c7/0x7c0 [ 39.957658] do_vmi_munmap+0x1f1/0x2b0 [ 39.958216] mmap_region+0x1f9/0x2660 [ 39.958753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.959314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.960099] ? __pfx_lock_acquire+0x10/0x10 [ 39.960689] ? __pfx_mmap_region+0x10/0x10 [ 39.961272] ? security_mmap_addr+0x7d/0xa0 [ 39.961866] ? get_unmapped_area+0x1f5/0x3f0 [ 39.962476] do_mmap+0x854/0xf00 [ 39.962963] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.963508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.964131] ksys_mmap_pgoff+0x3af/0x500 [ 39.964697] do_syscall_64+0x3f/0x90 [ 39.965225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.965960] RIP: 0033:0x7f37595f9d82 [ 39.966466] 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 [ 39.968822] RSP: 002b:00007ffccdeab168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.969819] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f37595f9d82 [ 39.970767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3758a33000 [ 39.971693] RBP: 00007f3758a33000 R08: 0000000000000009 R09: 0000000000001000 [ 39.972620] R10: 0000000000000812 R11: 0000000000000206 R12: 000055925589fb20 [ 39.973554] R13: 00007ffccdeab180 R14: 00007ffccdeab1b0 R15: 00007ffccdeab510 [ 39.974512] [ 39.974836] [ 39.975074] Allocated by task 212: [ 39.975544] kasan_save_stack+0x22/0x50 [ 39.976098] kasan_set_track+0x25/0x30 [ 39.976634] __kasan_slab_alloc+0x59/0x70 [ 39.977209] kmem_cache_alloc+0x16b/0x370 [ 39.977777] vm_area_dup+0x20/0x160 [ 39.978296] __split_vma+0x170/0x950 [ 39.978808] split_vma+0xc6/0x110 [ 39.979292] mprotect_fixup+0x8d2/0xb30 [ 39.979846] do_mprotect_pkey+0x87e/0xd40 [ 39.980420] __x64_sys_mprotect+0x78/0xc0 [ 39.980995] do_syscall_64+0x3f/0x90 [ 39.981521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.982236] [ 39.982473] Freed by task 203: [ 39.982908] kasan_save_stack+0x22/0x50 [ 39.983463] kasan_set_track+0x25/0x30 [ 39.984005] kasan_save_free_info+0x2b/0x50 [ 39.984595] __kasan_slab_free+0x10a/0x190 [ 39.985235] kmem_cache_free+0x10d/0x4d0 [ 39.985793] rcu_core+0x8c8/0x2860 [ 39.986302] __do_softirq+0x1b7/0x7d4 [ 39.986829] [ 39.987065] Last potentially related work creation: [ 39.987716] kasan_save_stack+0x22/0x50 [ 39.988268] __kasan_record_aux_stack+0x8e/0xa0 [ 39.988906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.989610] remove_vma+0x139/0x170 [ 39.990120] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.990736] do_vmi_munmap+0x1f1/0x2b0 [ 39.991271] __vm_munmap+0x138/0x3a0 [ 39.991786] __x64_sys_munmap+0x59/0x80 [ 39.992333] do_syscall_64+0x3f/0x90 [ 39.992856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.993559] [ 39.993795] The buggy address belongs to the object at ffff88800caff740 [ 39.993795] which belongs to the cache vm_area_struct of size 168 [ 39.995419] The buggy address is located 88 bytes inside of [ 39.995419] freed 168-byte region [ffff88800caff740, ffff88800caff7e8) [ 39.996961] [ 39.997200] The buggy address belongs to the physical page: [ 39.997946] page:000000004ea9a175 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaff [ 39.999134] memcg:ffff888009a84b01 [ 39.999608] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.000378] page_type: 0xffffffff() [ 40.000876] raw: 0100000000000200 ffff88800879fc80 ffffea0000659e80 dead000000000005 [ 40.001895] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a84b01 [ 40.002894] page dumped because: kasan: bad access detected [ 40.003620] [ 40.003856] Memory state around the buggy address: [ 40.004494] ffff88800caff680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.005432] ffff88800caff700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.006387] >ffff88800caff780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.007324] ^ [ 40.007866] ffff88800caff800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 40.008812] ffff88800caff880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 40.009751] ================================================================== [ 40.010829] Disabling lock debugging due to kernel taint [ 41.972924] BUG: Bad rss-counter state mm:00000000e1f088b2 type:MM_FILEPAGES val:33 [ 41.973933] BUG: Bad rss-counter state mm:00000000e1f088b2 type:MM_ANONPAGES val:22 [ 42.501193] BUG: Bad rss-counter state mm:00000000a32db9c8 type:MM_FILEPAGES val:33 [ 42.502205] BUG: Bad rss-counter state mm:00000000a32db9c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17630' (ECDSA) to the list of known hosts. 2023/06/20 07:56:54 fuzzer started 2023/06/20 07:56:55 dialing manager at localhost:44161 2023/06/20 07:56:55 checking machine... 2023/06/20 07:56:55 checking revisions... [ 43.279984] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:56:55 testing simple program... [ 43.327085] cgroup: Unknown subsys name 'net' [ 43.378723] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffaed493300 RCX=ffffffff813a0ac9 RDX=ffff8880144bd1c0 RSI=0000000000000100 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff888014797960 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6cb2 R12=0000000000000000 R13=0000000000000000 R14=ffff8880144bd1c0 R15=ffff88800e7c2d90 RIP=ffffffff814c07e0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffaecc5e900 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=00007ffaec07af70 CR3=0000000010266000 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=25252525252525252525252525252525 XMM01=000000000000000000ff00ff00000000 XMM02=000000000000000000ff000000000000 XMM03=006c616e72756f6a2f646d6574737973 XMM04=6227e7755f10229b00000000000ae988 XMM05=c9443f11995dd61d0000000000135450 XMM06=4fda316b135da52b0000000000133ed0 XMM07=fb795ef6d65770560000000000124718 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ce085c0 RCX=ffffffff812e00e5 RDX=1ffff11002ff52f3 RSI=ffffffff87b86f80 RDI=ffff888017fa9798 RBP=ffff88801914cd10 RSP=ffff888008e57ce8 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=0000000000000287 R13=ffffea0000338200 R14=ffffffff813782a8 R15=ffff88800ce085c0 RIP=ffffffff845135bc RFL=00000092 [--S-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 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=00007ffd31d40000 CR3=000000000e1d8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000