bisecting cause commit starting from 9b5bcb193a3bba4b96ead86df52602e3951655ba building syzkaller on 49ca1f59e37fcf63dc38a6bd2b60fcc47a0a708e testing commit 9b5bcb193a3bba4b96ead86df52602e3951655ba compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 31fbe599d491d420b1760555baa4d126c7c66c61972c129af9460b68df0c8ae4 run #0: crashed: KASAN: use-after-free Read in __dev_queue_xmit run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK reproducer seems to be flaky testing release v5.15 testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 23b867ff5df3d6cb6b498368a18ae79abf8004bbd96dea98ad38033811273ce5 all runs: OK # git bisect start 9b5bcb193a3bba4b96ead86df52602e3951655ba 8bb7eca972ad531c9b149c0a51ab43a417385813 Bisecting: 7944 revisions left to test after this (roughly 13 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [2219b0ceefe835b92a8a74a73fe964aa052742a2] Merge tag 'soc-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc testing commit 2219b0ceefe835b92a8a74a73fe964aa052742a2 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 955a5347dc85f91e4ef71b989d1e57b3eef54092cca4556a2b50e580fd523ef5 all runs: OK # git bisect good 2219b0ceefe835b92a8a74a73fe964aa052742a2 Bisecting: 3970 revisions left to test after this (roughly 12 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [dab334c98bf3563f57dc694242192f9e1cc95f96] Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux testing commit dab334c98bf3563f57dc694242192f9e1cc95f96 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b9ea5a3a05cba5d85185eefb7e74d177fd34ecdffda2321189a2c9917393a025 all runs: OK # git bisect good dab334c98bf3563f57dc694242192f9e1cc95f96 Bisecting: 1988 revisions left to test after this (roughly 11 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [6b38e2fb70b6682fd8f8cd24c03597e27fec3df3] Merge tag 's390-5.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux testing commit 6b38e2fb70b6682fd8f8cd24c03597e27fec3df3 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 8bc1c74285d1fb5a47781dfc7eda00aaccbb0b560c4b9a34253d586a1b735151 run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good 6b38e2fb70b6682fd8f8cd24c03597e27fec3df3 Bisecting: 994 revisions left to test after this (roughly 10 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [242e696e035fca96e972773023f20adfba124d10] mlxsw: reg: Adjust PPCNT register to support local port 255 testing commit 242e696e035fca96e972773023f20adfba124d10 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 run #0: crashed: KASAN: use-after-free Read in __dev_queue_xmit run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect bad 242e696e035fca96e972773023f20adfba124d10 Bisecting: 523 revisions left to test after this (roughly 9 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [af22d0550705dcb4142362b232f972bfab486b89] nfc: fdp: Merge the same judgment testing commit af22d0550705dcb4142362b232f972bfab486b89 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b0c38ec27b4a65dc7fe6512c7c1f6b18ec2ef12b0eb8d7c36aef54f26e1275a6 all runs: OK # git bisect good af22d0550705dcb4142362b232f972bfab486b89 Bisecting: 257 revisions left to test after this (roughly 8 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [ba2cacc18cb1c2f1bdaf5a1ccae22d16ca6420a0] Merge tag 'usb-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb testing commit ba2cacc18cb1c2f1bdaf5a1ccae22d16ca6420a0 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6a5c30d9ecef6777936f7643c280d202f5d0efec9b68d078dde5f609abc3c3a3 all runs: OK # git bisect good ba2cacc18cb1c2f1bdaf5a1ccae22d16ca6420a0 Bisecting: 121 revisions left to test after this (roughly 7 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [c5c17547b778975b3d83a73c8d84e8fb5ecf3ba5] Merge tag 'net-5.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net testing commit c5c17547b778975b3d83a73c8d84e8fb5ecf3ba5 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: bb117e845288f75e8d2d6c52bfcf530226d7afe9a779f45b8c028c416aa3e99e all runs: OK # git bisect good c5c17547b778975b3d83a73c8d84e8fb5ecf3ba5 Bisecting: 60 revisions left to test after this (roughly 6 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [b99658452355d316debee11079e8f1c6c1029355] net: dsa: ocelot: felix: utilize shared mscc-miim driver for indirect MDIO access testing commit b99658452355d316debee11079e8f1c6c1029355 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f8fd36ba0cd4274d911585159671745ebb3bd34eb0f06ea9bf16ecaf36450e6a run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good b99658452355d316debee11079e8f1c6c1029355 Bisecting: 30 revisions left to test after this (roughly 5 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [47327e198d42c77322dbe175817499d2d7ddc26a] net: prestera: acl: migrate to new vTCAM api testing commit 47327e198d42c77322dbe175817499d2d7ddc26a compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 all runs: OK # git bisect good 47327e198d42c77322dbe175817499d2d7ddc26a Bisecting: 15 revisions left to test after this (roughly 4 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [c2fbcc94d511e963d7fefa91d5f5748e8906f1cf] iavf: Refactor string format to avoid static analysis warnings testing commit c2fbcc94d511e963d7fefa91d5f5748e8906f1cf compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 run #0: crashed: KASAN: use-after-free Read in __dev_queue_xmit run #1: crashed: KASAN: use-after-free Read in __dev_queue_xmit run #2: OK run #3: crashed: KASAN: use-after-free Read in __dev_queue_xmit run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect bad c2fbcc94d511e963d7fefa91d5f5748e8906f1cf Bisecting: 7 revisions left to test after this (roughly 3 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [aeb5d11fd1efc96fefed850782a1ab62c4624c82] iavf: Add change MTU message testing commit aeb5d11fd1efc96fefed850782a1ab62c4624c82 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good aeb5d11fd1efc96fefed850782a1ab62c4624c82 Bisecting: 3 revisions left to test after this (roughly 2 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [b231b59a2f96bbc3f4759d2e8ecaa1c71a9e7616] iavf: Enable setting RSS hash key testing commit b231b59a2f96bbc3f4759d2e8ecaa1c71a9e7616 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 all runs: OK # git bisect good b231b59a2f96bbc3f4759d2e8ecaa1c71a9e7616 Bisecting: 1 revision left to test after this (roughly 1 step) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [349181b7b86367bfe66341c6fc2708f01c568f0d] iavf: Fix static code analysis warning testing commit 349181b7b86367bfe66341c6fc2708f01c568f0d compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM run #1: crashed: KASAN: use-after-free Read in __dev_queue_xmit run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect bad 349181b7b86367bfe66341c6fc2708f01c568f0d Bisecting: 0 revisions left to test after this (roughly 0 steps) warning: unable to access '/syzkaller/.config/git/ignore': Permission denied warning: unable to access '/syzkaller/.config/git/attributes': Permission denied [4d0dbd9678ad604963e9eab212fefb78a9fdb4aa] iavf: Refactor iavf_mac_filter struct memory usage testing commit 4d0dbd9678ad604963e9eab212fefb78a9fdb4aa compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 all runs: OK # git bisect good 4d0dbd9678ad604963e9eab212fefb78a9fdb4aa warning: unable to access '/syzkaller/.config/git/attributes': Permission denied 349181b7b86367bfe66341c6fc2708f01c568f0d is the first bad commit commit 349181b7b86367bfe66341c6fc2708f01c568f0d Author: Karen Sornek Date: Mon Aug 30 10:38:01 2021 +0200 iavf: Fix static code analysis warning Change min() to min_t() to fix static code analysis warning of possible overflow. Signed-off-by: Paul Greenwalt Signed-off-by: Karen Sornek Tested-by: Konrad Jankowski Signed-off-by: Tony Nguyen drivers/net/ethernet/intel/iavf/iavf_txrx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) culprit signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 parent signature: 38f99ec68b7cd4f26b0cf607de4ecd072f8b760bf10a26060d33a810881ab567 Reproducer flagged being flaky revisions tested: 16, total time: 3h22m45.579120191s (build: 1h50m37.064049339s, test: 1h30m30.932314548s) first bad commit: 349181b7b86367bfe66341c6fc2708f01c568f0d iavf: Fix static code analysis warning recipients (to): ["anthony.l.nguyen@intel.com" "karen.sornek@intel.com" "konrad0.jankowski@intel.com" "paul.greenwalt@intel.com"] recipients (cc): [] crash: KASAN: use-after-free Read in __dev_queue_xmit ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 ================================================================== BUG: KASAN: use-after-free in __dev_queue_xmit+0x26fe/0x2d20 net/core/dev.c:4073 Read of size 8 at addr ffff88805c42c408 by task aoe_tx0/1228 CPU: 0 PID: 1228 Comm: aoe_tx0 Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 __dev_queue_xmit+0x26fe/0x2d20 net/core/dev.c:4073 tx+0x59/0x80 drivers/block/aoe/aoenet.c:63 kthread+0x1c5/0x380 drivers/block/aoe/aoecmd.c:1230 kthread+0x3ab/0x480 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Allocated by task 13285: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522 kvmalloc include/linux/slab.h:741 [inline] kvzalloc include/linux/slab.h:749 [inline] netif_alloc_netdev_queues net/core/dev.c:9507 [inline] alloc_netdev_mqs+0x6c2/0xd60 net/core/dev.c:10202 rtnl_create_link+0x856/0xb60 net/core/rtnetlink.c:3182 __rtnl_newlink+0xc4a/0x13e0 net/core/rtnetlink.c:3447 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3505 rtnetlink_rcv_msg+0x31d/0x8d0 net/core/rtnetlink.c:5570 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2487 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1341 netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1912 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:724 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2409 ___sys_sendmsg+0xd3/0x150 net/socket.c:2463 __sys_sendmsg+0xb2/0x140 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 13285: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xff/0x130 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749 slab_free mm/slub.c:3513 [inline] kfree+0xf6/0x560 mm/slub.c:4561 netif_free_tx_queues net/core/dev.c:9495 [inline] free_netdev+0x8d/0x4e0 net/core/dev.c:10259 netdev_run_todo+0x72e/0x910 net/core/dev.c:9948 rtnl_unlock net/core/rtnetlink.c:112 [inline] rtnetlink_rcv_msg+0x325/0x8d0 net/core/rtnetlink.c:5571 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2487 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1341 netlink_sendmsg+0x706/0xbf0 net/netlink/af_netlink.c:1912 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:724 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2409 ___sys_sendmsg+0xd3/0x150 net/socket.c:2463 __sys_sendmsg+0xb2/0x140 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88805c42c400 which belongs to the cache kmalloc-cg-512 of size 512 The buggy address is located 8 bytes inside of 512-byte region [ffff88805c42c400, ffff88805c42c600) The buggy address belongs to the page: page:ffffea0001710b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5c42c head:ffffea0001710b00 order:2 compound_mapcount:0 compound_pincount:0 memcg:ffff88805c849901 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 ffff88800fc42dc0 raw: 0000000000000000 0000000000100010 00000001ffffffff ffff88805c849901 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4092, ts 123347057714, free_ts 8781636551 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0xa6f/0x2f10 mm/page_alloc.c:4149 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369 alloc_slab_page mm/slub.c:1793 [inline] allocate_slab mm/slub.c:1930 [inline] new_slab+0x32d/0x4a0 mm/slub.c:1993 ___slab_alloc+0x91a/0xfd0 mm/slub.c:3022 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109 slab_alloc_node mm/slub.c:3200 [inline] __kmalloc_node_track_caller+0x2cb/0x360 mm/slub.c:4956 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x8a/0x270 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1127 [inline] alloc_skb_with_frags+0x73/0x540 net/core/skbuff.c:5930 sock_alloc_send_pskb+0x636/0x7c0 net/core/sock.c:2581 unix_dgram_sendmsg+0x35a/0x16f0 net/unix/af_unix.c:1895 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:724 sock_write_iter+0x211/0x370 net/socket.c:1057 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write+0x4b0/0x600 fs/read_write.c:503 vfs_write+0x609/0x900 fs/read_write.c:590 ksys_write+0x171/0x1d0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3388 free_contig_range+0xa8/0xf0 mm/page_alloc.c:9271 destroy_args+0x7e/0x503 mm/debug_vm_pgtable.c:1016 debug_vm_pgtable+0x1ee5/0x1f69 mm/debug_vm_pgtable.c:1330 do_one_initcall+0xbe/0x440 init/main.c:1297 do_initcall_level init/main.c:1370 [inline] do_initcalls init/main.c:1386 [inline] do_basic_setup init/main.c:1405 [inline] kernel_init_freeable+0x5ab/0x605 init/main.c:1610 kernel_init+0x14/0x130 init/main.c:1499 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff88805c42c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805c42c380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88805c42c400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805c42c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805c42c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================