syzkaller login: [ 30.890833] BUG: Bad rss-counter state mm:00000000855482db type:MM_FILEPAGES val:33 [ 30.891851] BUG: Bad rss-counter state mm:00000000855482db type:MM_ANONPAGES val:22 [ 31.055266] ================================================================== [ 31.056251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.057261] Read of size 8 at addr ffff888019f7aed8 by task sshd/220 [ 31.058230] [ 31.058480] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.059419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.060454] Call Trace: [ 31.060796] [ 31.061095] dump_stack_lvl+0x91/0xf0 [ 31.061623] print_report+0xcc/0x620 [ 31.062186] ? __virt_addr_valid+0x102/0x340 [ 31.062780] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.063449] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.064104] kasan_report+0xbe/0xf0 [ 31.064622] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.065289] vma_interval_tree_remove+0xc75/0xec0 [ 31.065926] vma_prepare+0xc54/0x11a0 [ 31.066452] __split_vma+0x5af/0x950 [ 31.066950] ? __pfx___split_vma+0x10/0x10 [ 31.067516] ? find_held_lock+0x2c/0x110 [ 31.068078] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.068680] ? lock_is_held_type+0x9f/0x120 [ 31.069250] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.069894] ? mtree_range_walk+0x632/0x900 [ 31.070463] ? mas_walk+0x5c7/0x7c0 [ 31.070942] do_vmi_munmap+0x1f1/0x2b0 [ 31.071439] mmap_region+0x1f9/0x2660 [ 31.071931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.072448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.073167] ? __pfx_lock_acquire+0x10/0x10 [ 31.073709] ? __pfx_mmap_region+0x10/0x10 [ 31.074278] ? security_mmap_addr+0x7d/0xa0 [ 31.074811] ? get_unmapped_area+0x1f5/0x3f0 [ 31.075362] do_mmap+0x854/0xf00 [ 31.075801] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.076292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.076850] ksys_mmap_pgoff+0x3af/0x500 [ 31.077359] do_syscall_64+0x3f/0x90 [ 31.077839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.078514] RIP: 0033:0x7fdfde2d9d82 [ 31.078968] 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 [ 31.081069] RSP: 002b:00007ffd3999eb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.081960] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfde2d9d82 [ 31.082831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfdd713000 [ 31.083665] RBP: 00007fdfdd713000 R08: 0000000000000009 R09: 0000000000001000 [ 31.084499] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563524dbfec0 [ 31.085347] R13: 00007ffd3999eb90 R14: 00007ffd3999ebc0 R15: 00007ffd3999ef20 [ 31.086208] [ 31.086500] [ 31.086721] Allocated by task 213: [ 31.087146] kasan_save_stack+0x22/0x50 [ 31.087646] kasan_set_track+0x25/0x30 [ 31.088137] __kasan_slab_alloc+0x59/0x70 [ 31.088661] kmem_cache_alloc+0x16b/0x370 [ 31.089172] vm_area_dup+0x20/0x160 [ 31.089625] __split_vma+0x170/0x950 [ 31.090103] split_vma+0xc6/0x110 [ 31.090539] mprotect_fixup+0x8d2/0xb30 [ 31.091039] do_mprotect_pkey+0x87e/0xd40 [ 31.091559] __x64_sys_mprotect+0x78/0xc0 [ 31.092078] do_syscall_64+0x3f/0x90 [ 31.092548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.093184] [ 31.093399] Freed by task 213: [ 31.093797] kasan_save_stack+0x22/0x50 [ 31.094322] kasan_set_track+0x25/0x30 [ 31.094812] kasan_save_free_info+0x2b/0x50 [ 31.095334] __kasan_slab_free+0x10a/0x190 [ 31.095861] kmem_cache_free+0x10d/0x4d0 [ 31.096365] rcu_core+0x8c8/0x2860 [ 31.096802] __do_softirq+0x1b7/0x7d4 [ 31.097279] [ 31.097494] Last potentially related work creation: [ 31.098081] kasan_save_stack+0x22/0x50 [ 31.098575] __kasan_record_aux_stack+0x8e/0xa0 [ 31.099148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.099882] remove_vma+0x139/0x170 [ 31.100336] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.100893] do_vmi_munmap+0x1f1/0x2b0 [ 31.101371] __vm_munmap+0x138/0x3a0 [ 31.101837] __x64_sys_munmap+0x59/0x80 [ 31.102347] do_syscall_64+0x3f/0x90 [ 31.102821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103454] [ 31.103669] The buggy address belongs to the object at ffff888019f7ae80 [ 31.103669] which belongs to the cache vm_area_struct of size 168 [ 31.105115] The buggy address is located 88 bytes inside of [ 31.105115] freed 168-byte region [ffff888019f7ae80, ffff888019f7af28) [ 31.106512] [ 31.106730] The buggy address belongs to the physical page: [ 31.107380] page:000000008c0e86de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7a [ 31.108453] memcg:ffff88800fa12601 [ 31.108888] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.109528] page_type: 0xffffffff() [ 31.109972] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.110888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fa12601 [ 31.111787] page dumped because: kasan: bad access detected [ 31.112434] [ 31.112650] Memory state around the buggy address: [ 31.113216] ffff888019f7ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.114080] ffff888019f7ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.114922] >ffff888019f7ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.115762] ^ [ 31.116481] ffff888019f7af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.117323] ffff888019f7af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.118168] ================================================================== [ 31.119117] Disabling lock debugging due to kernel taint [ 33.474044] BUG: Bad rss-counter state mm:000000006c766bf4 type:MM_FILEPAGES val:33 [ 33.475101] BUG: Bad rss-counter state mm:000000006c766bf4 type:MM_ANONPAGES val:22 [ 33.979705] BUG: Bad rss-counter state mm:00000000cfd16b37 type:MM_FILEPAGES val:33 [ 33.980711] BUG: Bad rss-counter state mm:00000000cfd16b37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22702' (ECDSA) to the list of known hosts. 2023/06/19 21:50:44 fuzzer started 2023/06/19 21:50:45 dialing manager at localhost:44161 2023/06/19 21:50:45 checking machine... 2023/06/19 21:50:45 checking revisions... [ 34.623198] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:50:45 testing simple program... [ 34.668329] cgroup: Unknown subsys name 'net' [ 34.706556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:50:44 Registers: info registers vcpu 0 RAX=1ffff11002d6afcf RBX=dffffc0000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81390a68 RBP=ffff888015e051c0 RSP=ffff888016b57e58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888015e05a38 R13=ffff888015e051c0 R14=1ffff11002bc0b47 R15=0000000000000000 RIP=ffffffff811fc403 RFL=00000216 [----AP-] 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 00007fc85222e900 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=00007fc8527e5618 CR3=000000000dd8e000 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=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 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=00007fc985d933f0 CR3=000000000e990000 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=4baee1ece057c196eb40713f1221b654 XMM02=2c67c8bc2e329bc3000000000011cd60 XMM03=fb795ef6d65770560000000000124308 XMM04=1f8993094635fd3100000000000ae988 XMM05=19e9129bd510f2350000000000133ea8 XMM06=cd1bfc1b283d54690000000000132d10 XMM07=e042d86d42eb936e0000000000124588 XMM08=66c35009e97df818000000000011cdc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000