syzkaller login: [ 60.332175] BUG: Bad rss-counter state mm:00000000099ddb24 type:MM_FILEPAGES val:33 [ 60.333582] BUG: Bad rss-counter state mm:00000000099ddb24 type:MM_ANONPAGES val:22 [ 60.494559] ================================================================== [ 60.495525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.496548] Read of size 8 at addr ffff8880186c36b0 by task sshd/220 [ 60.497454] [ 60.497691] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.498605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.499683] Call Trace: [ 60.500029] [ 60.500342] dump_stack_lvl+0x91/0xf0 [ 60.500903] print_report+0xcc/0x620 [ 60.501440] ? __virt_addr_valid+0x102/0x340 [ 60.502047] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.502735] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.503425] kasan_report+0xbe/0xf0 [ 60.503958] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.504659] vma_interval_tree_remove+0xc75/0xec0 [ 60.505326] vma_prepare+0xc54/0x11a0 [ 60.505857] __split_vma+0x5af/0x950 [ 60.506379] ? __pfx___split_vma+0x10/0x10 [ 60.506968] ? find_held_lock+0x2c/0x110 [ 60.507546] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.508171] ? lock_is_held_type+0x9f/0x120 [ 60.508784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.509463] ? mtree_range_walk+0x632/0x900 [ 60.510072] ? mas_walk+0x5c7/0x7c0 [ 60.510602] do_vmi_munmap+0x1f1/0x2b0 [ 60.511146] mmap_region+0x1f9/0x2660 [ 60.511672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.512244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.513046] ? __pfx_lock_acquire+0x10/0x10 [ 60.513638] ? __pfx_mmap_region+0x10/0x10 [ 60.514229] ? security_mmap_addr+0x7d/0xa0 [ 60.514829] ? get_unmapped_area+0x1f5/0x3f0 [ 60.515419] do_mmap+0x854/0xf00 [ 60.515889] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.516446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.517034] ksys_mmap_pgoff+0x3af/0x500 [ 60.517584] do_syscall_64+0x3f/0x90 [ 60.518120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.518822] RIP: 0033:0x7f67317cfd82 [ 60.519317] 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 [ 60.521647] RSP: 002b:00007ffc05ac36b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.522624] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67317cfd82 [ 60.523496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6730c09000 [ 60.524413] RBP: 00007f6730c09000 R08: 0000000000000009 R09: 0000000000001000 [ 60.525332] R10: 0000000000000812 R11: 0000000000000206 R12: 000056303bddcec0 [ 60.526277] R13: 00007ffc05ac36d0 R14: 00007ffc05ac3700 R15: 00007ffc05ac3a60 [ 60.527234] [ 60.527556] [ 60.527794] Allocated by task 213: [ 60.528271] kasan_save_stack+0x22/0x50 [ 60.528793] kasan_set_track+0x25/0x30 [ 60.529290] __kasan_slab_alloc+0x59/0x70 [ 60.529876] kmem_cache_alloc+0x16b/0x370 [ 60.530448] vm_area_dup+0x20/0x160 [ 60.530954] __split_vma+0x170/0x950 [ 60.531473] split_vma+0xc6/0x110 [ 60.531964] mprotect_fixup+0x8d2/0xb30 [ 60.532544] do_mprotect_pkey+0x87e/0xd40 [ 60.533127] __x64_sys_mprotect+0x78/0xc0 [ 60.533710] do_syscall_64+0x3f/0x90 [ 60.534236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.534922] [ 60.535140] Freed by task 213: [ 60.535598] kasan_save_stack+0x22/0x50 [ 60.536160] kasan_set_track+0x25/0x30 [ 60.536717] kasan_save_free_info+0x2b/0x50 [ 60.537311] __kasan_slab_free+0x10a/0x190 [ 60.537918] kmem_cache_free+0x10d/0x4d0 [ 60.538489] rcu_core+0x8c8/0x2860 [ 60.538990] __do_softirq+0x1b7/0x7d4 [ 60.539528] [ 60.539769] Last potentially related work creation: [ 60.540448] kasan_save_stack+0x22/0x50 [ 60.541016] __kasan_record_aux_stack+0x8e/0xa0 [ 60.541663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.542387] remove_vma+0x139/0x170 [ 60.542872] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.543453] do_vmi_munmap+0x1f1/0x2b0 [ 60.544016] __vm_munmap+0x138/0x3a0 [ 60.544549] __x64_sys_munmap+0x59/0x80 [ 60.545107] do_syscall_64+0x3f/0x90 [ 60.545637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.546356] [ 60.546599] The buggy address belongs to the object at ffff8880186c3658 [ 60.546599] which belongs to the cache vm_area_struct of size 168 [ 60.548246] The buggy address is located 88 bytes inside of [ 60.548246] freed 168-byte region [ffff8880186c3658, ffff8880186c3700) [ 60.549850] [ 60.550093] The buggy address belongs to the physical page: [ 60.550841] page:000000000d9448b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186c3 [ 60.552070] memcg:ffff8880186c4001 [ 60.552554] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.553332] page_type: 0xffffffff() [ 60.553838] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b68c0 dead000000000003 [ 60.554866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880186c4001 [ 60.555881] page dumped because: kasan: bad access detected [ 60.556628] [ 60.556868] Memory state around the buggy address: [ 60.557525] ffff8880186c3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.558495] ffff8880186c3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.559458] >ffff8880186c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.560439] ^ [ 60.561095] ffff8880186c3700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 60.562067] ffff8880186c3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 60.563032] ================================================================== [ 60.564166] Disabling lock debugging due to kernel taint [ 62.488333] BUG: Bad rss-counter state mm:00000000457ba7c3 type:MM_FILEPAGES val:33 [ 62.489356] BUG: Bad rss-counter state mm:00000000457ba7c3 type:MM_ANONPAGES val:22 [ 62.983931] BUG: Bad rss-counter state mm:0000000046fcd584 type:MM_FILEPAGES val:33 [ 62.984941] BUG: Bad rss-counter state mm:0000000046fcd584 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38532' (ECDSA) to the list of known hosts. 2023/06/21 06:25:48 fuzzer started 2023/06/21 06:25:48 dialing manager at localhost:36067 2023/06/21 06:25:48 checking machine... 2023/06/21 06:25:48 checking revisions... [ 63.719846] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:25:48 testing simple program... [ 63.770385] cgroup: Unknown subsys name 'net' [ 63.813816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:25:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002d1ef6b RCX=0000000000000000 RDX=ffff88801a173680 RSI=ffffffff844fe9e2 RDI=ffff8880168f7b78 RBP=ffff8880168f7b78 RSP=ffff8880168f7b48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888008f7a808 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844f8496 RFL=00000293 [--S-A-C] 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 00007fb4a3492900 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=00007fb4a3a49618 CR3=000000000c92a000 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=0000000000000000 RBX=0000000000200000 RCX=ffffffff818a3365 RDX=ffff888014630000 RSI=0000000000200000 RDI=0000000000200000 RBP=000000076386cd5e RSP=ffff88801462f5b8 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000001 R12=ffff88801462f78c R13=eee88cadefc2844e R14=ffff88801462f750 R15=ffff88800ff88035 RIP=ffffffff814c0408 RFL=00000206 [-----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 00007fefb1e76900 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=00007fefb129b840 CR3=000000000da60000 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=2a7290c105353f2000000000000ae988 XMM05=0aa07d622ad73c600000000000132848 XMM06=4fda316b135da52b0000000000131638 XMM07=fb795ef6d65770560000000000121910 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000