syzkaller login: [ 35.430522] BUG: Bad rss-counter state mm:0000000036015cf8 type:MM_FILEPAGES val:33 [ 35.431798] BUG: Bad rss-counter state mm:0000000036015cf8 type:MM_ANONPAGES val:22 [ 35.470790] ================================================================== [ 35.471860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.472896] Read of size 8 at addr ffff88800d2c5798 by task sshd/220 [ 35.473760] [ 35.474046] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.475089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.476139] Call Trace: [ 35.476545] [ 35.476833] dump_stack_lvl+0x91/0xf0 [ 35.477324] print_report+0xcc/0x620 [ 35.477806] ? __virt_addr_valid+0x102/0x340 [ 35.478358] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.478992] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.479609] kasan_report+0xbe/0xf0 [ 35.480090] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.480710] vma_interval_tree_remove+0xc75/0xec0 [ 35.481315] vma_prepare+0xc54/0x11a0 [ 35.481794] __split_vma+0x5af/0x950 [ 35.482270] ? __pfx___split_vma+0x10/0x10 [ 35.482806] ? find_held_lock+0x2c/0x110 [ 35.483328] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.483891] ? lock_is_held_type+0x9f/0x120 [ 35.484427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.485035] ? mtree_range_walk+0x632/0x900 [ 35.485585] ? mas_walk+0x5c7/0x7c0 [ 35.486057] do_vmi_munmap+0x1f1/0x2b0 [ 35.486544] mmap_region+0x1f9/0x2660 [ 35.487049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.487560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.488272] ? __pfx_lock_acquire+0x10/0x10 [ 35.488801] ? __pfx_mmap_region+0x10/0x10 [ 35.489336] ? security_mmap_addr+0x7d/0xa0 [ 35.489866] ? get_unmapped_area+0x1f5/0x3f0 [ 35.490418] do_mmap+0x854/0xf00 [ 35.490871] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.491368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.491930] ksys_mmap_pgoff+0x3af/0x500 [ 35.492442] do_syscall_64+0x3f/0x90 [ 35.492917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.493561] RIP: 0033:0x7f1b621b4d82 [ 35.494016] 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 [ 35.496156] RSP: 002b:00007ffd21c34938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.497063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b621b4d82 [ 35.497916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b615ee000 [ 35.498781] RBP: 00007f1b615ee000 R08: 0000000000000009 R09: 0000000000001000 [ 35.499629] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556990596f70 [ 35.500482] R13: 00007ffd21c34950 R14: 00007ffd21c34980 R15: 00007ffd21c34ce0 [ 35.501345] [ 35.501639] [ 35.501853] Allocated by task 213: [ 35.502284] kasan_save_stack+0x22/0x50 [ 35.502799] kasan_set_track+0x25/0x30 [ 35.503296] __kasan_slab_alloc+0x59/0x70 [ 35.503822] kmem_cache_alloc+0x16b/0x370 [ 35.504349] vm_area_dup+0x20/0x160 [ 35.504809] __split_vma+0x170/0x950 [ 35.505274] split_vma+0xc6/0x110 [ 35.505717] mprotect_fixup+0x8d2/0xb30 [ 35.506226] do_mprotect_pkey+0x87e/0xd40 [ 35.506747] __x64_sys_mprotect+0x78/0xc0 [ 35.507287] do_syscall_64+0x3f/0x90 [ 35.507762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.508407] [ 35.508621] Freed by task 213: [ 35.509019] kasan_save_stack+0x22/0x50 [ 35.509520] kasan_set_track+0x25/0x30 [ 35.510018] kasan_save_free_info+0x2b/0x50 [ 35.510551] __kasan_slab_free+0x10a/0x190 [ 35.511088] kmem_cache_free+0x10d/0x4d0 [ 35.511594] rcu_core+0x8c8/0x2860 [ 35.512043] __do_softirq+0x1b7/0x7d4 [ 35.512521] [ 35.512735] Last potentially related work creation: [ 35.513320] kasan_save_stack+0x22/0x50 [ 35.513821] __kasan_record_aux_stack+0x8e/0xa0 [ 35.514401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.515053] remove_vma+0x139/0x170 [ 35.515590] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.516154] do_vmi_munmap+0x1f1/0x2b0 [ 35.516644] __vm_munmap+0x138/0x3a0 [ 35.517140] __x64_sys_munmap+0x59/0x80 [ 35.517653] do_syscall_64+0x3f/0x90 [ 35.518137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.518792] [ 35.519012] Second to last potentially related work creation: [ 35.519698] kasan_save_stack+0x22/0x50 [ 35.520204] __kasan_record_aux_stack+0x8e/0xa0 [ 35.520793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.521445] remove_vma+0x139/0x170 [ 35.521899] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.522466] do_vmi_munmap+0x1f1/0x2b0 [ 35.522964] mmap_region+0x1f9/0x2660 [ 35.523442] do_mmap+0x854/0xf00 [ 35.523894] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.524387] ksys_mmap_pgoff+0x3af/0x500 [ 35.524888] do_syscall_64+0x3f/0x90 [ 35.525372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.526023] [ 35.526252] The buggy address belongs to the object at ffff88800d2c5740 [ 35.526252] which belongs to the cache vm_area_struct of size 168 [ 35.527816] The buggy address is located 88 bytes inside of [ 35.527816] freed 168-byte region [ffff88800d2c5740, ffff88800d2c57e8) [ 35.529281] [ 35.529503] The buggy address belongs to the physical page: [ 35.530184] page:00000000e7732413 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd2c5 [ 35.531319] memcg:ffff88800d62a301 [ 35.531764] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.532433] page_type: 0xffffffff() [ 35.532904] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.533865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d62a301 [ 35.534816] page dumped because: kasan: bad access detected [ 35.535499] [ 35.535722] Memory state around the buggy address: [ 35.536335] ffff88800d2c5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.537223] ffff88800d2c5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.538114] >ffff88800d2c5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.539021] ^ [ 35.539524] ffff88800d2c5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.540414] ffff88800d2c5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.541303] ================================================================== [ 35.542285] Disabling lock debugging due to kernel taint [ 37.539084] BUG: Bad rss-counter state mm:00000000c6601b23 type:MM_FILEPAGES val:33 [ 37.540101] BUG: Bad rss-counter state mm:00000000c6601b23 type:MM_ANONPAGES val:22 [ 38.097847] BUG: Bad rss-counter state mm:00000000b1da5776 type:MM_FILEPAGES val:33 [ 38.099172] BUG: Bad rss-counter state mm:00000000b1da5776 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38888' (ECDSA) to the list of known hosts. 2023/06/19 22:50:24 fuzzer started 2023/06/19 22:50:24 dialing manager at localhost:44161 2023/06/19 22:50:24 checking machine... 2023/06/19 22:50:24 checking revisions... [ 38.725358] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:50:24 testing simple program... [ 38.773632] cgroup: Unknown subsys name 'net' [ 38.852600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:50:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe0ad483c8 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=00007f52bda7a510000055d578fd3790 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=ffffffff85d3bed0 RBX=1ffff1100282ff01 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88801417f7e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf361a0 R15=0000000000000000 RIP=ffffffff8180eeb6 RFL=00000002 [-------] 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 00007f5c5f3ee700 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=00007f36f7f4ce80 CR3=0000000018f84000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033323a3035 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000