syzkaller login: [ 30.862577] BUG: Bad rss-counter state mm:0000000054ea9cf1 type:MM_FILEPAGES val:33 [ 30.864205] BUG: Bad rss-counter state mm:0000000054ea9cf1 type:MM_ANONPAGES val:22 [ 31.045915] ================================================================== [ 31.046901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.047898] Read of size 8 at addr ffff88800f67d058 by task sshd/221 [ 31.048681] [ 31.048906] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.049867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.050862] Call Trace: [ 31.051184] [ 31.051481] dump_stack_lvl+0x91/0xf0 [ 31.052062] print_report+0xcc/0x620 [ 31.052584] ? __virt_addr_valid+0x102/0x340 [ 31.053136] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053788] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054405] kasan_report+0xbe/0xf0 [ 31.054902] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.055552] vma_interval_tree_remove+0xc75/0xec0 [ 31.056182] vma_prepare+0xc54/0x11a0 [ 31.056685] __split_vma+0x5af/0x950 [ 31.057272] ? __pfx___split_vma+0x10/0x10 [ 31.057826] ? find_held_lock+0x2c/0x110 [ 31.058348] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.058942] ? lock_is_held_type+0x9f/0x120 [ 31.059582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.060224] ? mtree_range_walk+0x632/0x900 [ 31.060818] ? mas_walk+0x5c7/0x7c0 [ 31.061316] do_vmi_munmap+0x1f1/0x2b0 [ 31.061845] mmap_region+0x1f9/0x2660 [ 31.062402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.062963] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.063712] ? __pfx_lock_acquire+0x10/0x10 [ 31.064243] ? __pfx_mmap_region+0x10/0x10 [ 31.064856] ? security_mmap_addr+0x7d/0xa0 [ 31.065418] ? get_unmapped_area+0x1f5/0x3f0 [ 31.065985] do_mmap+0x854/0xf00 [ 31.066431] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.066980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.067644] ksys_mmap_pgoff+0x3af/0x500 [ 31.068179] do_syscall_64+0x3f/0x90 [ 31.068690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.069389] RIP: 0033:0x7fe7f38f0d82 [ 31.069936] 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 [ 31.072151] RSP: 002b:00007ffd36df9e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.073153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7f38f0d82 [ 31.074053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7f2d2a000 [ 31.075022] RBP: 00007fe7f2d2a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.075907] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e669b70ec0 [ 31.076792] R13: 00007ffd36df9e90 R14: 00007ffd36df9ec0 R15: 00007ffd36dfa220 [ 31.077755] [ 31.078054] [ 31.078270] Allocated by task 214: [ 31.078714] kasan_save_stack+0x22/0x50 [ 31.079224] kasan_set_track+0x25/0x30 [ 31.079752] __kasan_slab_alloc+0x59/0x70 [ 31.080342] kmem_cache_alloc+0x16b/0x370 [ 31.080882] vm_area_dup+0x20/0x160 [ 31.081362] __split_vma+0x170/0x950 [ 31.081843] split_vma+0xc6/0x110 [ 31.082282] mprotect_fixup+0x8d2/0xb30 [ 31.082802] do_mprotect_pkey+0x87e/0xd40 [ 31.083324] __x64_sys_mprotect+0x78/0xc0 [ 31.083886] do_syscall_64+0x3f/0x90 [ 31.084383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.085099] [ 31.085413] Freed by task 214: [ 31.085830] kasan_save_stack+0x22/0x50 [ 31.086334] kasan_set_track+0x25/0x30 [ 31.086840] kasan_save_free_info+0x2b/0x50 [ 31.087382] __kasan_slab_free+0x10a/0x190 [ 31.087964] kmem_cache_free+0x10d/0x4d0 [ 31.088530] rcu_core+0x8c8/0x2860 [ 31.089015] __do_softirq+0x1b7/0x7d4 [ 31.089560] [ 31.089794] Last potentially related work creation: [ 31.090419] kasan_save_stack+0x22/0x50 [ 31.090964] __kasan_record_aux_stack+0x8e/0xa0 [ 31.091570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.092214] remove_vma+0x139/0x170 [ 31.092782] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.093384] do_vmi_munmap+0x1f1/0x2b0 [ 31.093894] __vm_munmap+0x138/0x3a0 [ 31.094362] __x64_sys_munmap+0x59/0x80 [ 31.094893] do_syscall_64+0x3f/0x90 [ 31.095434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096133] [ 31.096352] The buggy address belongs to the object at ffff88800f67d000 [ 31.096352] which belongs to the cache vm_area_struct of size 168 [ 31.097951] The buggy address is located 88 bytes inside of [ 31.097951] freed 168-byte region [ffff88800f67d000, ffff88800f67d0a8) [ 31.099375] [ 31.099617] The buggy address belongs to the physical page: [ 31.100354] page:00000000cbdcea21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf67d [ 31.101542] memcg:ffff8880165c0701 [ 31.102113] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.102860] page_type: 0xffffffff() [ 31.103375] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.104314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165c0701 [ 31.105281] page dumped because: kasan: bad access detected [ 31.106071] [ 31.106291] Memory state around the buggy address: [ 31.106882] ffff88800f67cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.107772] ffff88800f67cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.108753] >ffff88800f67d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.109661] ^ [ 31.110418] ffff88800f67d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.111378] ffff88800f67d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.112270] ================================================================== [ 31.113543] Disabling lock debugging due to kernel taint [ 32.871823] BUG: Bad rss-counter state mm:0000000034960248 type:MM_FILEPAGES val:33 [ 32.872578] BUG: Bad rss-counter state mm:0000000034960248 type:MM_ANONPAGES val:22 [ 33.292562] BUG: Bad rss-counter state mm:00000000e2f4820c type:MM_FILEPAGES val:33 [ 33.294113] BUG: Bad rss-counter state mm:00000000e2f4820c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6111' (ECDSA) to the list of known hosts. 2023/06/21 06:50:09 fuzzer started 2023/06/21 06:50:09 dialing manager at localhost:36067 2023/06/21 06:50:09 checking machine... 2023/06/21 06:50:09 checking revisions... [ 34.088190] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:50:09 testing simple program... [ 34.145401] cgroup: Unknown subsys name 'net' [ 34.243067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:50:09 Registers: info registers vcpu 0 RAX=ffffffff83680836 RBX=ffffffff85fa8d94 RCX=ffffffff836808b8 RDX=0000000000000000 RSI=ffffffff863b9296 RDI=ffffffff85fa8d78 RBP=ffffffff85fa8d98 RSP=ffff888014357150 R8 =ffffffff863b9296 R9 =ffff888014357248 R10=0000000000038001 R11=000000000008b8ed R12=ffffffff85fa8d9c R13=ffffffff85fa8d78 R14=ffffffff85fa8d88 R15=dffffc0000000000 RIP=ffffffff8112fc4f 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 00007ff434b1f900 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=00007ff433f97e10 CR3=000000000ed24000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=69a929d6edc3bb9f00000000000ae988 XMM05=d5c10728bcefabe30000000000132828 XMM06=c291bd5c70af25b900000000001318c8 XMM07=fb795ef6d65770560000000000121c00 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015939b40 RSI=ffffffff83ab18a9 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016af7508 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000051 R11=0000092900000929 R12=0000000000000000 R13=0000000000000051 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab18a9 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 00007f9ccff06900 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=00007f9cd04bd618 CR3=000000000ecfe000 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=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