syzkaller login: [ 24.329583] BUG: Bad rss-counter state mm:00000000d79b4dea type:MM_FILEPAGES val:33 [ 24.331371] BUG: Bad rss-counter state mm:00000000d79b4dea type:MM_ANONPAGES val:22 [ 24.478221] ================================================================== [ 24.479137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.480107] Read of size 8 at addr ffff88800f685b38 by task sshd/220 [ 24.480940] [ 24.481182] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.482070] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.483048] Call Trace: [ 24.483372] [ 24.483690] dump_stack_lvl+0x91/0xf0 [ 24.484189] print_report+0xcc/0x620 [ 24.484683] ? __virt_addr_valid+0x102/0x340 [ 24.485236] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.485876] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.486515] kasan_report+0xbe/0xf0 [ 24.486993] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.487625] vma_interval_tree_remove+0xc75/0xec0 [ 24.488235] vma_prepare+0xc54/0x11a0 [ 24.488720] __split_vma+0x5af/0x950 [ 24.489198] ? __pfx___split_vma+0x10/0x10 [ 24.489734] ? find_held_lock+0x2c/0x110 [ 24.490257] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.490830] ? lock_is_held_type+0x9f/0x120 [ 24.491381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.491996] ? mtree_range_walk+0x632/0x900 [ 24.492552] ? mas_walk+0x5c7/0x7c0 [ 24.493027] do_vmi_munmap+0x1f1/0x2b0 [ 24.493519] mmap_region+0x1f9/0x2660 [ 24.494012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.494530] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.495266] ? __pfx_lock_acquire+0x10/0x10 [ 24.495827] ? __pfx_mmap_region+0x10/0x10 [ 24.496365] ? security_mmap_addr+0x7d/0xa0 [ 24.496904] ? get_unmapped_area+0x1f5/0x3f0 [ 24.497455] do_mmap+0x854/0xf00 [ 24.497896] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.498388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.498970] ksys_mmap_pgoff+0x3af/0x500 [ 24.499481] do_syscall_64+0x3f/0x90 [ 24.499972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.500616] RIP: 0033:0x7fc235f52d82 [ 24.501080] 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 [ 24.503219] RSP: 002b:00007ffc87b4ed88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.504148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc235f52d82 [ 24.505008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc23538c000 [ 24.505879] RBP: 00007fc23538c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.506731] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572c7d7bb20 [ 24.507578] R13: 00007ffc87b4eda0 R14: 00007ffc87b4edd0 R15: 00007ffc87b4f130 [ 24.508458] [ 24.508753] [ 24.508974] Allocated by task 213: [ 24.509403] kasan_save_stack+0x22/0x50 [ 24.509916] kasan_set_track+0x25/0x30 [ 24.510424] __kasan_slab_alloc+0x59/0x70 [ 24.510958] kmem_cache_alloc+0x16b/0x370 [ 24.511474] vm_area_dup+0x20/0x160 [ 24.511949] __split_vma+0x170/0x950 [ 24.512419] split_vma+0xc6/0x110 [ 24.512863] mprotect_fixup+0x8d2/0xb30 [ 24.513374] do_mprotect_pkey+0x87e/0xd40 [ 24.513900] __x64_sys_mprotect+0x78/0xc0 [ 24.514420] do_syscall_64+0x3f/0x90 [ 24.514896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.515541] [ 24.515781] Freed by task 213: [ 24.516183] kasan_save_stack+0x22/0x50 [ 24.516688] kasan_set_track+0x25/0x30 [ 24.517186] kasan_save_free_info+0x2b/0x50 [ 24.517720] __kasan_slab_free+0x10a/0x190 [ 24.518260] kmem_cache_free+0x10d/0x4d0 [ 24.518771] rcu_core+0x8c8/0x2860 [ 24.519218] __do_softirq+0x1b7/0x7d4 [ 24.519704] [ 24.519926] Last potentially related work creation: [ 24.520518] kasan_save_stack+0x22/0x50 [ 24.521019] __kasan_record_aux_stack+0x8e/0xa0 [ 24.521595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.522232] remove_vma+0x139/0x170 [ 24.522696] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.523260] do_vmi_munmap+0x1f1/0x2b0 [ 24.523775] __vm_munmap+0x138/0x3a0 [ 24.524250] __x64_sys_munmap+0x59/0x80 [ 24.524749] do_syscall_64+0x3f/0x90 [ 24.525227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.525878] [ 24.526096] The buggy address belongs to the object at ffff88800f685ae0 [ 24.526096] which belongs to the cache vm_area_struct of size 168 [ 24.527582] The buggy address is located 88 bytes inside of [ 24.527582] freed 168-byte region [ffff88800f685ae0, ffff88800f685b88) [ 24.529022] [ 24.529242] The buggy address belongs to the physical page: [ 24.529909] page:00000000a80aee1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf685 [ 24.531003] memcg:ffff88800e3f5001 [ 24.531430] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.532132] page_type: 0xffffffff() [ 24.532582] raw: 0100000000000200 ffff88800879fc80 ffffea00003f0a40 dead000000000003 [ 24.533512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3f5001 [ 24.534440] page dumped because: kasan: bad access detected [ 24.535117] [ 24.535331] Memory state around the buggy address: [ 24.535940] ffff88800f685a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.536815] ffff88800f685a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.537679] >ffff88800f685b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.538541] ^ [ 24.539161] ffff88800f685b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.540033] ffff88800f685c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.540901] ================================================================== [ 24.542018] Disabling lock debugging due to kernel taint [ 26.822868] BUG: Bad rss-counter state mm:00000000a859d6fb type:MM_FILEPAGES val:33 [ 26.824054] BUG: Bad rss-counter state mm:00000000a859d6fb type:MM_ANONPAGES val:22 [ 27.220565] BUG: Bad rss-counter state mm:00000000290f6b4a type:MM_FILEPAGES val:33 [ 27.221910] BUG: Bad rss-counter state mm:00000000290f6b4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47739' (ECDSA) to the list of known hosts. 2023/06/19 23:36:01 fuzzer started 2023/06/19 23:36:01 dialing manager at localhost:44161 2023/06/19 23:36:01 checking machine... 2023/06/19 23:36:01 checking revisions... [ 27.919147] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:36:01 testing simple program... [ 27.963847] cgroup: Unknown subsys name 'net' [ 28.009993] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:00 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff888016f875c0 RDX=1ffff11002df0eaf RSI=ffffffff813ad6d0 RDI=ffff888016f875e8 RBP=ffff888016f875b8 RSP=ffff888016f87518 R8 =0000000000000001 R9 =ffff888016f87560 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016f875e8 R13=0000000000000000 R14=ffff888015af1b40 R15=00000000000000e8 RIP=ffffffff813ad424 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 00007f3fddee0900 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=00007f3fde497618 CR3=000000001c67c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f8c15ebfbe0 CR3=000000001452a000 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=00000000000000000000000000000000 XMM01=fef23d18dbfb71a565413e147ddfde13 XMM02=2c67c8bc2e329bc3000000000011f9c8 XMM03=fb795ef6d65770560000000000123670 XMM04=018030b6f65cea3c00000000000ae988 XMM05=19e9129bd510f2350000000000133218 XMM06=0625418a4c8f34df00000000001323f0 XMM07=e042d86d42eb936e00000000001238f0 XMM08=393a033467830d8b000000000011fa28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000