syzkaller login: [ 31.025164] BUG: Bad rss-counter state mm:00000000b0ebd1ab type:MM_FILEPAGES val:33 [ 31.026411] BUG: Bad rss-counter state mm:00000000b0ebd1ab type:MM_ANONPAGES val:22 [ 31.065303] ================================================================== [ 31.066214] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.067142] Read of size 8 at addr ffff88800b35c228 by task sshd/220 [ 31.067904] [ 31.068122] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.069147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.070141] Call Trace: [ 31.070460] <TASK> [ 31.070745] dump_stack_lvl+0x91/0xf0 [ 31.071252] print_report+0xcc/0x620 [ 31.071735] ? __virt_addr_valid+0x102/0x340 [ 31.072282] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.072895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073507] kasan_report+0xbe/0xf0 [ 31.073987] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074613] vma_interval_tree_remove+0xc75/0xec0 [ 31.075215] vma_prepare+0xc54/0x11a0 [ 31.075697] __split_vma+0x5af/0x950 [ 31.076166] ? __pfx___split_vma+0x10/0x10 [ 31.076697] ? find_held_lock+0x2c/0x110 [ 31.077216] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.077783] ? lock_is_held_type+0x9f/0x120 [ 31.078352] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.078962] ? mtree_range_walk+0x632/0x900 [ 31.079515] ? mas_walk+0x5c7/0x7c0 [ 31.079989] do_vmi_munmap+0x1f1/0x2b0 [ 31.080485] mmap_region+0x1f9/0x2660 [ 31.080967] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.081479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.082200] ? __pfx_lock_acquire+0x10/0x10 [ 31.082736] ? __pfx_mmap_region+0x10/0x10 [ 31.083267] ? security_mmap_addr+0x7d/0xa0 [ 31.083799] ? get_unmapped_area+0x1f5/0x3f0 [ 31.084353] do_mmap+0x854/0xf00 [ 31.084787] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.085282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.085851] ksys_mmap_pgoff+0x3af/0x500 [ 31.086364] do_syscall_64+0x3f/0x90 [ 31.086843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.087502] RIP: 0033:0x7f64da235d82 [ 31.087963] 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 [ 31.090105] RSP: 002b:00007fffafa565f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.091022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64da235d82 [ 31.091868] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64d966f000 [ 31.092719] RBP: 00007f64d966f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.093568] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbec993ec0 [ 31.094424] R13: 00007fffafa56610 R14: 00007fffafa56640 R15: 00007fffafa569a0 [ 31.095298] </TASK> [ 31.095603] [ 31.095817] Allocated by task 212: [ 31.096267] kasan_save_stack+0x22/0x50 [ 31.096807] kasan_set_track+0x25/0x30 [ 31.097312] __kasan_slab_alloc+0x59/0x70 [ 31.097849] kmem_cache_alloc+0x16b/0x370 [ 31.098403] vm_area_dup+0x20/0x160 [ 31.098863] __split_vma+0x170/0x950 [ 31.099322] split_vma+0xc6/0x110 [ 31.099760] mprotect_fixup+0x8d2/0xb30 [ 31.100254] do_mprotect_pkey+0x87e/0xd40 [ 31.100776] __x64_sys_mprotect+0x78/0xc0 [ 31.101291] do_syscall_64+0x3f/0x90 [ 31.101768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102405] [ 31.102619] Freed by task 13: [ 31.103005] kasan_save_stack+0x22/0x50 [ 31.103506] kasan_set_track+0x25/0x30 [ 31.103999] kasan_save_free_info+0x2b/0x50 [ 31.104525] __kasan_slab_free+0x10a/0x190 [ 31.105110] kmem_cache_free+0x10d/0x4d0 [ 31.105644] rcu_core+0x8c8/0x2860 [ 31.106102] __do_softirq+0x1b7/0x7d4 [ 31.106594] [ 31.106821] Last potentially related work creation: [ 31.107439] kasan_save_stack+0x22/0x50 [ 31.107965] __kasan_record_aux_stack+0x8e/0xa0 [ 31.108553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.109201] remove_vma+0x139/0x170 [ 31.109663] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.110253] do_vmi_munmap+0x1f1/0x2b0 [ 31.110743] __vm_munmap+0x138/0x3a0 [ 31.111217] __x64_sys_munmap+0x59/0x80 [ 31.111717] do_syscall_64+0x3f/0x90 [ 31.112197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.112840] [ 31.113054] The buggy address belongs to the object at ffff88800b35c1d0 [ 31.113054] which belongs to the cache vm_area_struct of size 168 [ 31.114550] The buggy address is located 88 bytes inside of [ 31.114550] freed 168-byte region [ffff88800b35c1d0, ffff88800b35c278) [ 31.115999] [ 31.116226] The buggy address belongs to the physical page: [ 31.116929] page:00000000610fa2e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb35c [ 31.118065] memcg:ffff8880169dfa01 [ 31.118530] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.119216] page_type: 0xffffffff() [ 31.119687] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.120648] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169dfa01 [ 31.121590] page dumped because: kasan: bad access detected [ 31.122287] [ 31.122509] Memory state around the buggy address: [ 31.123115] ffff88800b35c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.124008] ffff88800b35c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.124905] >ffff88800b35c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.125810] ^ [ 31.126408] ffff88800b35c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.127309] ffff88800b35c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.128209] ================================================================== [ 31.129386] Disabling lock debugging due to kernel taint [ 33.531479] BUG: Bad rss-counter state mm:0000000001679a42 type:MM_FILEPAGES val:33 [ 33.532244] BUG: Bad rss-counter state mm:0000000001679a42 type:MM_ANONPAGES val:22 [ 33.973801] BUG: Bad rss-counter state mm:00000000b00b4bd3 type:MM_FILEPAGES val:33 [ 33.975565] BUG: Bad rss-counter state mm:00000000b00b4bd3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62496' (ECDSA) to the list of known hosts. 2023/06/20 01:08:09 fuzzer started 2023/06/20 01:08:09 dialing manager at localhost:44161 2023/06/20 01:08:09 checking machine... 2023/06/20 01:08:09 checking revisions... [ 34.697726] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:08:09 testing simple program... [ 34.744096] cgroup: Unknown subsys name 'net' [ 34.789728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:08:08 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=0000000000000001 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=00007ffc4ff3bb18 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=00007f87a24a15100000558a88ddb790 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b15f4 RDX=1ffff1100d9e134f RSI=ffff888016d17c80 RDI=ffff88806cf09a78 RBP=ffff888016d17c80 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000008a85c R12=0000000000000008 R13=ffff88806cf09ac0 R14=ffff888016d17c80 R15=ffff88806cf09a78 RIP=ffffffff8113040f RFL=00000212 [----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 00007f6536053900 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=00007f653660a618 CR3=0000000009680000 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=563412feff00545000000000000080fe 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