Hello, syzbot found the following issue on: HEAD commit: 788220eee30d Merge tag 'pm-6.11-rc7' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a2189f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=6217aa8bbaeb1577 dashboard link: https://syzkaller.appspot.com/bug?extid=086fa22d07b56091fd1e compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f72c76601a03/disk-788220ee.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/89cddc06c675/vmlinux-788220ee.xz kernel image: https://storage.googleapis.com/syzbot-assets/22a1d1d497f6/bzImage-788220ee.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+086fa22d07b56091fd1e@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-use-after-free in bt_accept_dequeue+0x582/0x600 net/bluetooth/af_bluetooth.c:249 Read of size 8 at addr ffff8880336f0500 by task krfcommd/2839 CPU: 0 UID: 0 PID: 2839 Comm: krfcommd Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 bt_accept_dequeue+0x582/0x600 net/bluetooth/af_bluetooth.c:249 l2cap_sock_accept+0x2c8/0x650 net/bluetooth/l2cap_sock.c:351 kernel_accept+0x1d3/0x380 net/socket.c:3607 rfcomm_accept_connection net/bluetooth/rfcomm/core.c:1971 [inline] rfcomm_process_sessions net/bluetooth/rfcomm/core.c:2030 [inline] rfcomm_run+0x3a7/0x5220 net/bluetooth/rfcomm/core.c:2126 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 9307: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4162 [inline] __kmalloc_noprof+0x1e8/0x400 mm/slub.c:4174 kmalloc_noprof include/linux/slab.h:685 [inline] sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2096 sk_alloc+0x36/0xb90 net/core/sock.c:2149 bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148 l2cap_sock_alloc.constprop.0+0x35/0x180 net/bluetooth/l2cap_sock.c:1877 l2cap_sock_new_connection_cb+0x101/0x240 net/bluetooth/l2cap_sock.c:1468 l2cap_connect.constprop.0+0x765/0x1270 net/bluetooth/l2cap_core.c:3980 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline] l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline] l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514 hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline] hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028 process_one_work+0x9c8/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 11681: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x12a/0x3b0 mm/slub.c:4598 sk_prot_free net/core/sock.c:2132 [inline] __sk_destruct+0x5eb/0x720 net/core/sock.c:2224 sk_destruct+0xc2/0xf0 net/core/sock.c:2239 __sk_free+0xf4/0x3e0 net/core/sock.c:2250 sk_free+0x6a/0x90 net/core/sock.c:2261 sock_put include/net/sock.h:1884 [inline] l2cap_sock_kill net/bluetooth/l2cap_sock.c:1250 [inline] l2cap_sock_kill+0x171/0x2d0 net/bluetooth/l2cap_sock.c:1235 l2cap_sock_close_cb+0x44/0x60 net/bluetooth/l2cap_sock.c:1557 l2cap_conn_del+0x3be/0x730 net/bluetooth/l2cap_core.c:1787 l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline] hci_conn_failed+0x1c6/0x370 net/bluetooth/hci_conn.c:1265 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583 hci_disconnect_all_sync.constprop.0+0x104/0x3c0 net/bluetooth/hci_sync.c:5606 hci_suspend_sync+0x772/0xab0 net/bluetooth/hci_sync.c:6083 hci_suspend_dev+0x2ac/0x480 net/bluetooth/hci_core.c:2826 hci_suspend_notifier+0x28d/0x2f0 net/bluetooth/hci_core.c:2412 notifier_call_chain+0xbc/0x410 kernel/notifier.c:93 notifier_call_chain_robust kernel/notifier.c:128 [inline] blocking_notifier_call_chain_robust kernel/notifier.c:353 [inline] blocking_notifier_call_chain_robust+0xc9/0x170 kernel/notifier.c:341 pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102 snapshot_open+0x198/0x2b0 kernel/power/user.c:77 misc_open+0x3dd/0x4c0 drivers/char/misc.c:165 chrdev_open+0x270/0x6f0 fs/char_dev.c:414 do_dentry_open+0x922/0x15f0 fs/open.c:959 vfs_open+0x82/0x3f0 fs/open.c:1089 do_open fs/namei.c:3727 [inline] path_openat+0x2141/0x2d20 fs/namei.c:3886 do_filp_open+0x1dc/0x430 fs/namei.c:3913 do_sys_openat2+0x17a/0x1e0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1442 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880336f0000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1280 bytes inside of freed 2048-byte region [ffff8880336f0000, ffff8880336f0800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880336f6000 pfn:0x336f0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810 raw: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000 head: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810 head: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea0000cdbc01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5518, tgid 5518 (kworker/0:7), ts 1161965798443, free_ts 1161930025325 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2325 allocate_slab mm/slub.c:2488 [inline] new_slab+0x84/0x260 mm/slub.c:2541 ___slab_alloc+0xdac/0x1870 mm/slub.c:3727 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817 __slab_alloc_node mm/slub.c:3870 [inline] slab_alloc_node mm/slub.c:4029 [inline] __do_kmalloc_node mm/slub.c:4161 [inline] __kmalloc_node_track_caller_noprof+0x355/0x430 mm/slub.c:4181 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:605 __alloc_skb+0x164/0x380 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6526 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2815 sock_alloc_send_skb include/net/sock.h:1778 [inline] mld_newpack.isra.0+0x1ed/0x790 net/ipv6/mcast.c:1746 add_grhead+0x299/0x340 net/ipv6/mcast.c:1849 add_grec+0x111e/0x1670 net/ipv6/mcast.c:1987 mld_send_cr net/ipv6/mcast.c:2113 [inline] mld_ifc_work+0x41f/0xca0 net/ipv6/mcast.c:2650 page last free pid 11267 tgid 11267 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3992 [inline] slab_alloc_node mm/slub.c:4041 [inline] __kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4188 kmalloc_noprof include/linux/slab.h:681 [inline] call_modprobe kernel/module/kmod.c:84 [inline] __request_module+0x2c6/0x6c0 kernel/module/kmod.c:173 dev_load+0x1ff/0x240 net/core/dev_ioctl.c:646 dev_ioctl+0x473/0x10c0 net/core/dev_ioctl.c:710 sock_do_ioctl+0x19e/0x280 net/socket.c:1236 sock_ioctl+0x22e/0x6c0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x196/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff8880336f0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880336f0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880336f0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880336f0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880336f0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:779 [inline] BUG: KASAN: slab-use-after-free in bt_accept_dequeue+0x1f6/0x600 net/bluetooth/af_bluetooth.c:253 Write of size 4 at addr ffff8880336f0080 by task krfcommd/2839 CPU: 1 UID: 0 PID: 2839 Comm: krfcommd Tainted: G B 6.11.0-rc6-syzkaller-00268-g788220eee30d #0 Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:779 [inline] bt_accept_dequeue+0x1f6/0x600 net/bluetooth/af_bluetooth.c:253 l2cap_sock_accept+0x2c8/0x650 net/bluetooth/l2cap_sock.c:351 kernel_accept+0x1d3/0x380 net/socket.c:3607 rfcomm_accept_connection net/bluetooth/rfcomm/core.c:1971 [inline] rfcomm_process_sessions net/bluetooth/rfcomm/core.c:2030 [inline] rfcomm_run+0x3a7/0x5220 net/bluetooth/rfcomm/core.c:2126 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 9307: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4162 [inline] __kmalloc_noprof+0x1e8/0x400 mm/slub.c:4174 kmalloc_noprof include/linux/slab.h:685 [inline] sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2096 sk_alloc+0x36/0xb90 net/core/sock.c:2149 bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148 l2cap_sock_alloc.constprop.0+0x35/0x180 net/bluetooth/l2cap_sock.c:1877 l2cap_sock_new_connection_cb+0x101/0x240 net/bluetooth/l2cap_sock.c:1468 l2cap_connect.constprop.0+0x765/0x1270 net/bluetooth/l2cap_core.c:3980 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline] l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline] l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514 hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline] hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028 process_one_work+0x9c8/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 11681: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x12a/0x3b0 mm/slub.c:4598 sk_prot_free net/core/sock.c:2132 [inline] __sk_destruct+0x5eb/0x720 net/core/sock.c:2224 sk_destruct+0xc2/0xf0 net/core/sock.c:2239 __sk_free+0xf4/0x3e0 net/core/sock.c:2250 sk_free+0x6a/0x90 net/core/sock.c:2261 sock_put include/net/sock.h:1884 [inline] l2cap_sock_kill net/bluetooth/l2cap_sock.c:1250 [inline] l2cap_sock_kill+0x171/0x2d0 net/bluetooth/l2cap_sock.c:1235 l2cap_sock_close_cb+0x44/0x60 net/bluetooth/l2cap_sock.c:1557 l2cap_conn_del+0x3be/0x730 net/bluetooth/l2cap_core.c:1787 l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline] hci_conn_failed+0x1c6/0x370 net/bluetooth/hci_conn.c:1265 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583 hci_disconnect_all_sync.constprop.0+0x104/0x3c0 net/bluetooth/hci_sync.c:5606 hci_suspend_sync+0x772/0xab0 net/bluetooth/hci_sync.c:6083 hci_suspend_dev+0x2ac/0x480 net/bluetooth/hci_core.c:2826 hci_suspend_notifier+0x28d/0x2f0 net/bluetooth/hci_core.c:2412 notifier_call_chain+0xbc/0x410 kernel/notifier.c:93 notifier_call_chain_robust kernel/notifier.c:128 [inline] blocking_notifier_call_chain_robust kernel/notifier.c:353 [inline] blocking_notifier_call_chain_robust+0xc9/0x170 kernel/notifier.c:341 pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102 snapshot_open+0x198/0x2b0 kernel/power/user.c:77 misc_open+0x3dd/0x4c0 drivers/char/misc.c:165 chrdev_open+0x270/0x6f0 fs/char_dev.c:414 do_dentry_open+0x922/0x15f0 fs/open.c:959 vfs_open+0x82/0x3f0 fs/open.c:1089 do_open fs/namei.c:3727 [inline] path_openat+0x2141/0x2d20 fs/namei.c:3886 do_filp_open+0x1dc/0x430 fs/namei.c:3913 do_sys_openat2+0x17a/0x1e0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1442 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880336f0000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff8880336f0000, ffff8880336f0800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880336f6000 pfn:0x336f0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810 raw: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000 head: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810 head: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea0000cdbc01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5518, tgid 5518 (kworker/0:7), ts 1161965798443, free_ts 1161930025325 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2325 allocate_slab mm/slub.c:2488 [inline] new_slab+0x84/0x260 mm/slub.c:2541 ___slab_alloc+0xdac/0x1870 mm/slub.c:3727 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817 __slab_alloc_node mm/slub.c:3870 [inline] slab_alloc_node mm/slub.c:4029 [inline] __do_kmalloc_node mm/slub.c:4161 [inline] __kmalloc_node_track_caller_noprof+0x355/0x430 mm/slub.c:4181 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:605 __alloc_skb+0x164/0x380 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6526 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2815 sock_alloc_send_skb include/net/sock.h:1778 [inline] mld_newpack.isra.0+0x1ed/0x790 net/ipv6/mcast.c:1746 add_grhead+0x299/0x340 net/ipv6/mcast.c:1849 add_grec+0x111e/0x1670 net/ipv6/mcast.c:1987 mld_send_cr net/ipv6/mcast.c:2113 [inline] mld_ifc_work+0x41f/0xca0 net/ipv6/mcast.c:2650 page last free pid 11267 tgid 11267 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3992 [inline] slab_alloc_node mm/slub.c:4041 [inline] __kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4188 kmalloc_noprof include/linux/slab.h:681 [inline] call_modprobe kernel/module/kmod.c:84 [inline] __request_module+0x2c6/0x6c0 kernel/module/kmod.c:173 dev_load+0x1ff/0x240 net/core/dev_ioctl.c:646 dev_ioctl+0x473/0x10c0 net/core/dev_ioctl.c:710 sock_do_ioctl+0x19e/0x280 net/socket.c:1236 sock_ioctl+0x22e/0x6c0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x196/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff8880336eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880336f0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880336f0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880336f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880336f0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This report is generated by a bot. 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